EP2543890B1 - Sicherheitskomponente - Google Patents

Sicherheitskomponente Download PDF

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Publication number
EP2543890B1
EP2543890B1 EP11172516.4A EP11172516A EP2543890B1 EP 2543890 B1 EP2543890 B1 EP 2543890B1 EP 11172516 A EP11172516 A EP 11172516A EP 2543890 B1 EP2543890 B1 EP 2543890B1
Authority
EP
European Patent Office
Prior art keywords
digital valve
digital
valve group
control
safety
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.)
Not-in-force
Application number
EP11172516.4A
Other languages
English (en)
French (fr)
Other versions
EP2543890A1 (de
Inventor
Pekka Pihola
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.)
Valmet Technologies Oy
Original Assignee
Valmet Technologies Oy
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 Valmet Technologies Oy filed Critical Valmet Technologies Oy
Priority to EP11172516.4A priority Critical patent/EP2543890B1/de
Priority to CN201210230426.7A priority patent/CN102865451B/zh
Publication of EP2543890A1 publication Critical patent/EP2543890A1/de
Application granted granted Critical
Publication of EP2543890B1 publication Critical patent/EP2543890B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
    • F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
    • F15B11/0426—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling the number of pumps or parallel valves switched on
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/30575—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve in a Wheatstone Bridge arrangement (also half bridges)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • F15B2211/40576—Assemblies of multiple valves
    • F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths
    • 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
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members

Definitions

  • the invention relates to a safety component according to the preamble part of claim 1.
  • a safety component is a device or a part that forms one unit and that is exchangeable and that provides for a safety function and that when malfunctioning endangers persons within its working area and that is not needed for functioning of the machine or machinery that it is combined with and that could be replaced by an ordinary component for the machine or machinery to function.
  • the functional components of machines or machinery are not considered as safety components but instead they are especially designed for providing a safety function.
  • Safety components are defined in Machinery Directive 2006/42/EC.
  • the present invention relates especially to safety components as defined in Appendix 5 item 5 Valves meant for controlling dangerous movements of machines that have a special function of detecting failure.
  • Hydraulic and pneumatic systems and actuators used in them are generally used for the generation of motions and forces. Actuators get their driving force from a hydraulic or pneumatic aggregate in the form of a pressure medium i.e. fluid that can be in form of gas, liquid, a mixture of gas and liquid and sometimes even comprising medium in solid form.
  • a pressure medium i.e. fluid that can be in form of gas, liquid, a mixture of gas and liquid and sometimes even comprising medium in solid form.
  • Safety design of machines and machinery is usually based on stopping movement of a moving machine part before someone is entering the area of danger due to this movement, for example gates with electric locks are provided.
  • gates with electric locks are provided in prior art.
  • devices base on detecting a human are used as safety components but in practise many on them have deficiencies that make their use as safety components restricted to certain, limited uses as they seldom have properties that provide for fault tolerance.
  • WO publication 2009/077650 is disclosed a known method for dealing with faults occurring during the manufacture of a material web in which digital valve group / digital valve groups is/are arranged for controlling and adjusting normal functions of a machine or a machine part not as safety components.
  • the safety valve known from this publication is a valve that controls the hydraulic actuator in, for example overload situations.
  • GB patent application publication 2367868 is disclosed a delayed rear brake application in electro-hydraulic braking system in which in emergency a master cylinder mechanically couple to the brake pedal can supply fluid directly to front brake actuators in a push-through mode via digital valves.
  • WO publication 2007/087030 is disclosed a versatile emergency shutdown device controller which may be used in various different emergency shutdown configurations and in one example a digital valve controller is disclosed for use with the emergency shutdown.
  • a similar device is also known from WO 2010/136253 .
  • An object of the invention is to further develop the technology of safety components so that controllability and adjustability, and operational reliability would be improved, and the need for service of the functions or actuators would decrease.
  • a non-limiting further object of the invention is to provide a safety component that reliably provides a slow movement that is safe when process or maintenance requires someone to be in an area of danger but does not allow anyone present i.e. provides safety when machine or machinery is working in fast speed.
  • the safety component is arranged by means of at least one digital valve group and the safety component comprises a control valve that comprises at least two digital valve groups and that the safety component control valve has means for providing safety function and means for providing functional property, such as work function.
  • the safety component is arranged by means of at least two digital valve groups.
  • a valve for a fluid system that utilises the digital technique and by which speed of a movement can be restricted with very high reliability.
  • a safety component that combines safety to a component with a functional property is created.
  • the digital valve functioning as safety component is two ways safe as substantially simultaneously both the work side flow and the return side flow back to the tank are limited.
  • a digital valve group comprising at least two digital valves a safety component combines limiting of speed of a movement (flow) as required with chosen valve groups and coils and an electrically controllable group is created. Double control can be provided according to an advantageous feature by a safety relay. Thus by the invention the safety function is provided reliably as hardware.
  • speed (flow of fluid) is defined by affecting the electrical connection of a valve.
  • speed flow of fluid
  • more than one speed can be defined for the valve.
  • the present invention provides for many advantages.
  • the fluid system is simplified which brings cost savings both in relation to the functional property and especially in relation to the safety properties in product and production safety and no more two separate component systems are needed.
  • the invention provides for possibilities of creating safety function in combination with force, energy etc. functions that are controllable by digital valve technique. As the system is simplified also testing, repairing and using is easier which all factors lower the production cost of machine as well as advance safety of the machine.
  • the digital valve technique is also known as being safe even when malfunctions occur. Also the possible malfunction is better controllable than in connection with prior art control valves since a problem in direction of working of shank does not stop functioning of the other valves. As a property of this digital valve technique is high level of fault tolerance and detecting of problems, one single failure does not in practice lead to non-functioning of safety properties.
  • Especially advantageous embodiments of the invention are such hydraulic systems for a slitter winder or reeler, in which big force and big position accuracy are needed simultaneously.
  • Such embodiments typically comprise functions affecting the fibrous web of a wound fibrous web roll or starts, motions and stops of heavy machine parts.
  • a feature common to all of these is that the processing efficiency of the fibrous web improves, the faster the function in question can be performed.
  • Most often the function is related to a transaction outside the actual wind-up step, such as the beginning or end of the winding up, when the production speed has had to be reduced lower than normal in order to perform the function in question.
  • the invention is advantageously used in connection with fiber web machine applications, for example in connection with secondary carriage of a reel-up, with rotating device of a tambour and in connection with maintenance stages of different machine parts of fiber web machines.
  • liquid is mainly used of the pressure medium, but actually this is a fluid, the characteristics of which especially include flow-ability.
  • This fluid can be liquid, gas or, for example, a mixture of liquid and gas or a mixture of some other, for example, solid component part.
  • Digital hydraulics refers to a system, in which at least part of the components is based on digital valves.
  • a digital valve group refers to a valve unit, in which there is at least one digital valve group, which again contains a number of digital valves connected in parallel in relation to the fluid flow passing through the digital valve group.
  • a digital valve again refers to a valve intended for adjusting the fluid's volume flow, the valve having 2 - N different stepped discrete adjustment modes, especially 2 different discrete adjustment modes (open/closed), and for which the control signal to be brought from the control system has advantageously been digitalised, such as binary form.
  • the digital valve has advantageously two modes; it is either fully open or fully closed. When the digital valve is open, the entire volume flow of liquid allowed by the digital valve passes through it, and when the digital valve is closed, no liquid at all passes through it.
  • such a digitally controllable digital valve having two modes is also called an on/off valve and an on/off digital valve.
  • the digital valve can also have more than two modes, in which case the valve is driven in a stepped manner from one mode to another.
  • the digital valve can have three positions; it lets the liquid flow pass to a first or second direction, or then the valve does not allow any fluid to pass through it.
  • the adjusting directive (control signal) is of a digital nature, such as binary. According to the adjusting directive, the volume flow from the digital valve group and the pressure caused by the flow are adjusted by opening a certain valve combination of the digital valve group so that a desired opening of the digital valve group and a desired volume flow of the fluid are achieved. Deviating from an analogue valve, each digital valve connected in parallel can only have a limited number of adjusting modes, i.e. the digital valve only has certain discrete flowing modes.
  • each digital valve has three modes: open / closed / quick opening.
  • each digital valve preferably has simply the on/off mode; when open, the valve lets a certain volume flow through it; when closed, it completely prevents the fluid from passing through.
  • the digital valve group consists of digital valves with two modes (on/off). In this case, two successive digital valves with nominal volume flow amounts, the volume flow passing through the valve with bigger nominal volume flow in the open position is always two times bigger than the volume flow of the valve with smaller nominal volume flow.
  • a binary control signal can then be brought to such a digital value group, in which the control signal's magnitude has been converted into a binary number.
  • an analogue valve is adjusted with a control signal (adjusting directive), the magnitude of which is 12 units, the analogue valve stem moves a quantity comparable with 12 control units, in which case the valve lets through a volume flow that has increased respectively.
  • adjusting directive the magnitude of which is 12 units
  • control signal (adjusting directive) of 12 units, in which the sizes of the volume flows the digital valves 1, 2, 3, 4, 5 let through are respectively 1, 2, 4, 8 and 16 units
  • FIG. 1 a schematically presented example of an advantageous embodiment of the invention is illustrated.
  • This example is based on that movements of a machine part are adjusted by a hydraulic or pneumatic actuator 5 giving the movement stroke.
  • the pressure line 11 is for to inlet fluid flow for providing the movement strokes and the return line 12 is for the fluid medium low to the tank.
  • This example comprises a control valve 10 creating at the same time the safety component.
  • the safety component i.e. the control valve comprises four digital valve groups DV which simultaneously create functions for the safety component 10 (see examples in figure 2 -4 ).
  • Digital valve group DV1 provides for the control of work movement of actuator 5
  • digital valve group DV4 provides for control of return movement of actuator 5
  • digital valve groups DV2 and DV3 provide for control return flow back to tank.
  • control messages used by the digital valve groups and transmitted by the adjusting system are both in digital form, which achieves the considerable benefit in relation to analogue valves that the adjusting information does not need to be converted from digital to analogue so that no information can disappear when converting the digital control message from the adjusting system into an analogue control message.
  • a digital valve groups DV in the control valve and safety component combination 10, it is possible to control the volume flow of the hydraulic or pneumatic actuator 5 in a very exact manner.
  • the operation of the digital valve groups DV is considerably fast so that it is possible to control the same hydraulic or pneumatic actuator 5 with the same digital valve group both when changing from fast i.e. production speed required by a big change in volume flow and when changing to low speed for example for maintenance that requires a relatively small change in volume flow.
  • control valve 10 is provided by the control of both one digital valve group DV1; DV4 for work stroke and one return flow controlling digital valve group DV2; DV3 simultaneously and thus providing for strong double safety guard as needed.
  • figure 1 also an enlargement of one digital valve group DV is shown as det A.
  • FIGS 2-4 are illustrated examples for providing the control system for one digital valve group DV. In these figures only few examples of electrical control for one digital group are illustrated but it is clear to one skilled in the art that the possibilities have a large variety.
  • the machine control system comprises single binary valves Q and in the example of figures 2-4 single binary valves Q5 - Q8 are provided with control devices K1, K2 that can be for example safety relays, safety logic units (safety PLCs), relay connections, safety controls built on relays etc.
  • safety devices K1, K2 safety function is created such that at least partly opening of binary valves connected, i.e. in this example binary valves Q5 - Q8 is prevented.
  • the electrical control of one digital valve group can be created by breaking the electric inlet card of the output of logic, by breaking each output separately, by breaking one set of outputs.
  • the digital valve group DV can also consist of several on/off valves with different diameters or valves that otherwise let through different volume flows. These valves are controlled to open and close by a different control unit so that it is possible to achieve the desired pressure/flow on the side of the cylinder piston and arm.
  • the valve response times are fast, typically 1 - 5 ms.
  • Figure 1 illustrates a general graph of a safety component 10 created by a control valve that is applicable in a variety of different kind of objects, in which there are two directions of movement and the component 10 comprises four individual digital valve groups DV. If only one direction of movement is applicable only two individual digital valve groups are needed. These arrangements are especially advantageously suited for basic level solutions, in which quite extreme resolution is not necessarily needed but by the same principles more complicated systems can be created if needed.
  • the invention is advantageously used in connection with fiber web machine applications, for example in connection with secondary carriage of a reel-up, with rotating device of a tambour and in connection with maintenance stages of different machine parts of fiber web.
  • the movement is in two directions and four digital valves DV are needed and in connection with the example of the rotating device of a tambour when rotating in one direction two digital valves DV are needed.
  • the maintenance application of the present invention could be for example pressure roll control and its maintenance stage.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Claims (8)

  1. Sicherheitskomponente zum Steuern von Bewegungen von Maschinen, wobei die Bewegungen durch ein Fluidsystem erzeugt werden, wobei die Sicherheitskomponente (10) mittels wenigstens zwei Digitalventilgruppen (DV) gebildet ist, wobei das Sicherheitskomponenten-Steuerventil (10) eine Einrichtung zur Erzeugung einer Sicherheitsfunktion und eine Einrichtung zur Erzeugung einer funktionalen Eigenschaft, wie z. B. einer Arbeitsfunktion, aufweist,
    dadurch gekennzeichnet, dass
    die Sicherheitskomponente (10) ein Steuerventil aufweist, das zwei Digitalventilgruppen (DV) für jede Bewegungsrichtung aufweist, und dass die Sicherheitskomponente im Wesentlichen simultan mittels einer Digitalventilgruppe (DV1; DV4) für eine Arbeitsseitenströmung gesteuert wird, wobei eine Digitalventilgruppe (DV1) die Steuerung der Arbeitsbewegung erzeugt und eine Digitalventilgruppe (DV4) die Steuerung der Rückwärtsbewegung erzeugt und eine Digitalventilgruppe (DV2; DV3) die Rückströmungsseiten zurück zu dem Tank erzeugt.
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Digitalventilgruppe aus mehreren An-/Aus-Ventilen mit unterschiedlichen Durchmessern besteht.
  3. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Digitalventilgruppe aus mehreren An-/Aus-Ventilen mit identischen Durchmessern besteht.
  4. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Digitalventilgruppe aus mehreren An-/Aus-Ventilen mit unterschiedlichen Volumenströmen besteht.
  5. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    das Steuersignal für die Digitalventilgruppe digital ist, wie z. B. binär.
  6. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    das Steuersignal von jedem Digitalventil in der Digitalventilgruppe binär ist, so dass das Signal 0 oder 1 lautet.
  7. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    die Sicherheitskomponente in einer Faserbahnmaschine vorgesehen ist.
  8. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, dass
    das Digitalventil dafür vorgesehen ist, seine Fehler selbst zu überwachen, die Fehler bei anderen Digitalventilen in dem Digitalventilsystem zu kompensieren und den Fehler zu dem Steuersystem zu berichten.
EP11172516.4A 2011-07-04 2011-07-04 Sicherheitskomponente Not-in-force EP2543890B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11172516.4A EP2543890B1 (de) 2011-07-04 2011-07-04 Sicherheitskomponente
CN201210230426.7A CN102865451B (zh) 2011-07-04 2012-07-04 安全组件

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11172516.4A EP2543890B1 (de) 2011-07-04 2011-07-04 Sicherheitskomponente

Publications (2)

Publication Number Publication Date
EP2543890A1 EP2543890A1 (de) 2013-01-09
EP2543890B1 true EP2543890B1 (de) 2018-09-05

Family

ID=45418978

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11172516.4A Not-in-force EP2543890B1 (de) 2011-07-04 2011-07-04 Sicherheitskomponente

Country Status (2)

Country Link
EP (1) EP2543890B1 (de)
CN (1) CN102865451B (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013004437A1 (de) * 2013-02-20 2014-08-21 Robert Bosch Gmbh Hydraulisches Sicherheits- und Bewegungsregelsystem
CN113607405B (zh) * 2021-07-28 2022-07-29 燕山大学 一种数字阀组多故障检测装置及其诊断方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000052374A1 (en) * 1999-03-04 2000-09-08 Fisher Controls International, Inc. Emergency shutdown test system
GB2367868A (en) * 2000-10-14 2002-04-17 Trw Ltd Delayed rear brake application in electro-hydraulic (EHB) braking systems
US20020145515A1 (en) * 2001-04-05 2002-10-10 Snowbarger Jimmie L. System to manually initiate an emergency shutdown test and collect diagnostic data in a process control environment
US20070018127A1 (en) * 2005-07-20 2007-01-25 Fisher Controls International Llc Emergency shutdown system
WO2007087030A1 (en) * 2006-01-20 2007-08-02 Fisher Controls International Llc Versatile emergency shutdown device controller
DE102009026608A1 (de) * 2009-05-29 2010-12-02 Metso Paper, Inc. Verfahren zum Entfernen von Fremdstoffen aus einem digitalhydraulischen Druckregler eines Hydrauliksystems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI113794B (fi) * 2002-11-14 2004-06-15 Metso Paper Inc Menetelmä ja järjestely pitkänomaisen telavälineen paikan ja/tai voiman säätämiseksi
FI120317B (fi) * 2007-12-14 2009-09-15 Metso Paper Inc Menetelmä materiaalirainan valmistuksen aikaisten häiriöiden käsittelemiseksi ja laitteisto menetelmän toteuttamiseksi kalanterissa
DE202009013507U1 (de) * 2009-07-31 2010-02-11 Robert Bosch Gmbh Hydraulische Steuerung mit Digitalhydraulik
DE102009055308A1 (de) * 2009-12-23 2011-06-30 Metso Paper, Inc. Anordnung zur Regelung der Position einer Walze oder des Spaltdrucks eines Walzenspalts in einer Faserstoffbahnmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000052374A1 (en) * 1999-03-04 2000-09-08 Fisher Controls International, Inc. Emergency shutdown test system
GB2367868A (en) * 2000-10-14 2002-04-17 Trw Ltd Delayed rear brake application in electro-hydraulic (EHB) braking systems
US20020145515A1 (en) * 2001-04-05 2002-10-10 Snowbarger Jimmie L. System to manually initiate an emergency shutdown test and collect diagnostic data in a process control environment
US20070018127A1 (en) * 2005-07-20 2007-01-25 Fisher Controls International Llc Emergency shutdown system
WO2007087030A1 (en) * 2006-01-20 2007-08-02 Fisher Controls International Llc Versatile emergency shutdown device controller
DE102009026608A1 (de) * 2009-05-29 2010-12-02 Metso Paper, Inc. Verfahren zum Entfernen von Fremdstoffen aus einem digitalhydraulischen Druckregler eines Hydrauliksystems

Also Published As

Publication number Publication date
EP2543890A1 (de) 2013-01-09
CN102865451A (zh) 2013-01-09
CN102865451B (zh) 2016-03-09

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