EP2956584B1 - Verfahren zum beheizen einer einbaubohle eines strassenfertigers - Google Patents

Verfahren zum beheizen einer einbaubohle eines strassenfertigers Download PDF

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Publication number
EP2956584B1
EP2956584B1 EP13707801.0A EP13707801A EP2956584B1 EP 2956584 B1 EP2956584 B1 EP 2956584B1 EP 13707801 A EP13707801 A EP 13707801A EP 2956584 B1 EP2956584 B1 EP 2956584B1
Authority
EP
European Patent Office
Prior art keywords
current generator
voltage
heating elements
paver
charged
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
EP13707801.0A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2956584A1 (de
Inventor
Uwe Trox
Giuseppe ROMANO
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.)
Ammann Schweiz AG
Original Assignee
Ammann Schweiz AG
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Filing date
Publication date
Application filed by Ammann Schweiz AG filed Critical Ammann Schweiz AG
Publication of EP2956584A1 publication Critical patent/EP2956584A1/de
Application granted granted Critical
Publication of EP2956584B1 publication Critical patent/EP2956584B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/48—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for laying-down the materials and consolidating them, or finishing the surface, e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/0014—Devices wherein the heating current flows through particular resistances
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
    • E01C2301/10—Heated screeds

Definitions

  • the invention relates to a method for heating a screed equipped with an electric heater screed paver and a road paver, in particular for carrying out the method, according to the preambles of the independent claims.
  • an electric screed heater for example, electric heating rods are distributed in the screed, which are powered by a powered by the primary drive source, usually a diesel engine, three-phase alternator with three-phase.
  • a powered by the primary drive source usually a diesel engine
  • three-phase alternator with three-phase.
  • Common practice is to operate the screed heater permanently and at full power. As a result, however, the alternator, especially under unfavorable operating conditions, permanently high load and energy is wasted.
  • a first aspect of the invention relates to a method for heating a screed of a paver with a heater having a plurality of electrical heating elements.
  • These are preferably designed as resistance heating elements.
  • other electrical heating elements such as e.g. Quartz heater.
  • other heating devices e.g. Gas burner, to use.
  • the electric heating elements are supplied with a current generator with electric current, so that they produce heat as intended, for heating the screed.
  • the heating power of the electric heating elements of the heating device is changed by the fact that the electrical voltage with which they are applied, is changed.
  • the primary driving engine is spared and, in the case of an internal combustion engine, e.g. Diesel engine, fuel saved.
  • a three-phase alternator As a power generator for supplying the heating elements with electric current, a three-phase alternator is used. Such generators are powerful, robust and inexpensive available as standard components.
  • the electrical voltage with which at least some of the heating elements are acted upon, is changed by the fact that these heating elements are temporarily connected in star connection and temporarily in delta connection with the alternator.
  • the electrical heating elements of the heater so configurable that with them a symmetrical load of the alternator is possible.
  • the heating elements are each subjected to the electrical voltage which lies between the respective phases of the three-phase generator, which connect them to one another.
  • the heating elements are each subjected to a much smaller electrical voltage.
  • a heating device which comprises at least two groups of electric heating elements, which are operable both in star connection and in delta connection with the three-phase generator, and the electrical voltage with which these heating elements are acted upon is changed in that these groups temporarily simultaneously be connected in star connection with the power generator and / or temporarily connected simultaneously in delta connection with the power generator, and temporarily connected in the mutual alternating cycle in star and delta connection to the power generator.
  • the electrical voltage with which the heating elements or the heating elements are applied, and consequently the heating power of the heating device also changed by the fact that the electrical voltage generated by the power generator is changed.
  • the electrical voltage with which the electrical heating elements of the heater are applied, depending on one or more operating parameters of the paver, the screed and / or the power generator is changed.
  • Such parameters can be, for example, the temperatures of components, in particular of the working components, of tamper strips, screed plates and / or pressure strips of the screed, the temperature of the asphalt to be installed at a certain location within the asphalt paver, especially directly in front of the screed, the speed of the paver and / or the winding temperatures of the power generator. This makes it possible to optimally adapt the heating of the screed to the respective requirements and circumstances.
  • the electrical voltage with which the electric heating elements are acted upon exceeding a temperature at the power generator such as a measured at the winding of the power generator temperature, and / or when a temperature at the screed is exceeded or in the vicinity of the screed, eg a temperature of working components of the screed.
  • the electrical voltage applied to the electrical heating elements falls below a temperature at the current generator, e.g. a measured at the winding of the power generator temperature, and / or falls below a temperature at the screed or in the vicinity of the screed, e.g. a temperature of working components of the screed, increase.
  • the heat output can be optimally adapted to the respective requirements within the capacity of the power generator.
  • the electrical voltage with which the electrical heating elements are acted upon temporarily set such that the power generator runs in overload operation.
  • the electrical voltage with which the electrical heating elements are acted upon set such that the power generator in overload operation runs, preferably at maximum overload.
  • the electrical voltage is then reduced to a voltage at which of the Generator in nominal or partial load mode is running.
  • the electrical voltage with which the electrical heating elements are applied starting from a voltage at which the power generator runs in the nominal load or partial load operation, depending on one or more operating parameters of the paver, the screed and / or the power generator is temporarily increased to a voltage at which the power generator is in overload operation.
  • Such operation is particularly useful when a shorter part load operating phase is followed by a short term substantially increased heating energy demand, e.g. if after a break in which the screed is kept at a lower temperature than the operating temperature in order to save energy, it should be brought back to operating temperature as quickly as possible.
  • a second aspect of the invention relates to a road paver which is preferably suitable for carrying out the method according to the first aspect of the invention.
  • the paver comprises a screed which is equipped with an electric heater with a plurality of electric heating elements.
  • the heating elements are preferably designed as resistance heating elements.
  • the paver includes a power generator for applying electrical power to the heating elements to generate heat.
  • the asphalt paver has devices with which the electrical voltage with which the electrical heating elements are subjected during normal operation can be changed in a targeted manner to change the heating power of the heating device.
  • the heating power of the screed can be controlled or regulated without switching on and off of the heating elements, which makes them more energy-efficient Operation is possible and the life of both the heating elements and the generator can be significantly improved.
  • the driving motor is constantly charged, whereby this is spared and in the case of an internal combustion engine, such as diesel engine, fuel is saved.
  • the power generator of the paver is designed as a three-phase alternator and the heater comprises a plurality of electrical heating elements with which the three phases of the alternator can be preferably symmetrically loaded during normal operation.
  • Such generators are relatively powerful, robust and inexpensive and also allow operation of multiple electrical heating elements either in star and delta connection.
  • the means for varying the electrical voltage with which the electrical heating elements are acted upon is designed such that with them these heating elements of the heater can be connected both in star connection as well as in delta connection with the power generator.
  • delta connection the heating elements are each subjected to the electrical voltage which lies between the phases of the three-phase generator, which connect them to one another.
  • star connection the heating elements are each subjected to a much smaller electrical voltage.
  • the heating device has at least two groups of electric heating elements which can be operated independently of one another both in star connection and in delta connection with the three-phase generator.
  • the means for varying the electrical voltage with which these groups of electrical heating elements are applied are designed such that with them these groups of heating elements both simultaneously in star connection and / or simultaneously in delta connection as well as each other can be alternately connected in star and delta connection to the power generator.
  • the means for varying the electrical voltage with which the electrical heating elements can be acted upon also designed such that with them a change in the electrical voltage generated by the power generator is possible.
  • these devices are advantageously designed such that with them the excitation current of the power generator and / or the drive speed of the power generator can be changed, which then leads to change the electrical voltage generated by the power generator.
  • the means for varying the electrical voltage comprise a controller by means of which this voltage can be changed automatically in accordance with one or more operating parameters of the paver, the screed and / or the power generator.
  • the controller advantageously has means for determining specific temperatures at the power generator, preferably for determining a winding temperature of the power generator, and / or facilities for determining certain temperatures on the screed or in the vicinity of the screed, preferably for determining the temperature of working components of the Screed, and is designed such that with it the electrical voltage with which the one or more electrical heating elements in the intended Operation can be applied, can be changed depending on the determined temperatures.
  • the controller is designed such that it, the electric voltage applied to the electric heating elements, when a temperature at the power generator, e.g. a measured at the winding of the power generator temperature, and / or when a temperature at the screed or in the vicinity of the screed, e.g. a temperature of working components of the screed, can reduce, preferably to a predetermined value.
  • a temperature at the power generator e.g. a measured at the winding of the power generator temperature
  • a temperature at the screed or in the vicinity of the screed e.g. a temperature of working components of the screed
  • the controller is designed such that it controls the electrical voltage applied to the electric heating elements when the temperature falls below a temperature at the current generator, e.g. a winding temperature of the power generator, and / or falls below a temperature at the screed or in the vicinity of the screed, e.g. a certain temperature of working components of the screed, can increase, preferably to a predetermined value.
  • a temperature at the current generator e.g. a winding temperature of the power generator
  • a temperature at the screed or in the vicinity of the screed e.g. a certain temperature of working components of the screed
  • the controller is designed such that it temporarily the electrical voltage with which the electric heating elements are applied in such a way can set the current generator to operate in overload mode.
  • the controller comprises an operating mode in which the initial heating of the screed, the electrical voltage applied to the electric heating elements is set such that the power generator is in overload operation, preferably at maximum overload, and at Exceeding a temperature at the power generator, preferably a certain winding temperature of the power generator, and / or when exceeding a temperature at the screed, preferably a certain temperature of working components of the screed, the electrical voltage with which the one or more electrical heating elements are applied to a voltage is reduced, at which the power generator runs in nominal load operation or in partial load operation.
  • the controller is designed such that it controls the electrical voltage with which the electrical heating elements are applied, starting from a voltage at which the current generator runs in the nominal load or partial load mode, depending on one or more operating parameters of the paver , which can temporarily increase the screed and / or the power generator to a voltage at which the power generator is in overload operation.
  • This makes it possible to provide a significantly higher than the nominal heating power available in the short term, for example, if after a break in which the screed is kept at a lower temperature than the operating temperature in order to save energy, this again should be brought to operating temperature as quickly as possible.
  • Fig. 1 shows the diagram of a heater of the screed of a first paver with associated control for carrying out the inventive method.
  • this heater includes as main components a three-phase alternator 1, a plurality of heating element groups 2a-2x each comprising three identical electrical resistance heating elements 2, which are arranged in the screed 10 of the paver, and a computer-aided control unit 3 for controlling or adjusting the heating power of the heating elements.
  • a three-phase alternator 1 a plurality of heating element groups 2a-2x each comprising three identical electrical resistance heating elements 2, which are arranged in the screed 10 of the paver, and a computer-aided control unit 3 for controlling or adjusting the heating power of the heating elements.
  • the groups 2a-2x of heating elements 2 are via a common voltage regulator 4, a common ground fault monitoring device 5 (insulation meter, fault current monitoring), a common main contactor 6 (galvanic isolation) and each group 2a-2x on group fuses 7a-7x (line protection) and circuit breaker 8a-8x (electronic or electromechanical) in star connection with the three phases L1, L2, L3 of the alternator 1 connected or connectable.
  • the generator 1, the voltage regulator 4, the ground fault monitor 5 and the screed 10 are galvanically connected to each other for electrical equipotential bonding.
  • the generator 1 is equipped with a temperature sensor 9, from which the control unit 3 receives a generator temperature actual value Tg via the voltage regulator 4. In addition, the control unit 3 receives from the voltage regulator 4 a generator voltage actual value U.
  • the screed 10 has, for each heating element group 2a-2x, a temperature sensor 11a-11x assigned to this group, which detects a screed temperature in the region of the associated heating element group 2a-2x and is connected to the control unit 3 in order to supply it to the respective temperature sensor. Actual value Ta-Tx to be played.
  • the ground fault monitoring 5 supplies the control unit 3 with the current insulation value IS and can be controlled by the control unit 3 for test or reset purposes T / R.
  • the main contactor 6 notifies the control unit 3 of its current switching state I / 0 and receives its switching commands S1 from the control unit 3.
  • the circuit breakers 8a-8x also receive their switching commands S2 from the control unit 3,
  • the setting or regulation of the heating power of the heating element groups 2a-2x is carried out by the control unit 3. This tells the voltage regulator 4 a desired generator voltage setpoint Us, which corresponds to a desired heat output, and the voltage regulator then changes the excitation current for the excitation winding 12th until the generator voltage actual value U corresponds to the generator voltage setpoint Us.
  • the heating element groups 2a-2x can be intermittently interrupted by the control unit 3 by means of the respective power switches 8a-8x via S2 to further reduce the heating power. and be turned off, which is preferably success in alternating cycle success.
  • the desired heating power or the desired generator voltage setpoint Us can be determined by the control unit 3 in various ways.
  • control unit 3 it is possible for the control unit 3 to communicate a desired screed temperature, whereupon the control unit continuously compares the screed temperatures Ta-Tx determined with the temperature sensors 11a-11x with the desired screed temperature and, according to a suitable algorithm, the required heating power and the associated generator voltage setpoint Us determined and leaves over the voltage regulator 4.
  • control unit 3 It is also possible to operate the control unit 3 programmatically to automated to achieve a certain temperature profile at the screed.
  • the control unit 3 has e.g. via a "cold start operating mode" in which it increases the generator voltage U by setting a corresponding generator voltage setpoint Us such that the generator 1 initially, while its windings are still cold, at maximum allowable overload for the initial rapid heating of the screed 10 runs and upon reaching a certain measured generator temperature Tg automatically reduced to a generator voltage U at which the generator 1 runs in the nominal load or partial load operation.
  • a cold start operating mode in which it increases the generator voltage U by setting a corresponding generator voltage setpoint Us such that the generator 1 initially, while its windings are still cold, at maximum allowable overload for the initial rapid heating of the screed 10 runs and upon reaching a certain measured generator temperature Tg automatically reduced to a generator voltage U at which the generator 1 runs in the nominal load or partial load operation.
  • the temperature sensor 9 serves as overload protection for the generator 1 in the present heating device. If the measured generator temperature Tg exceeds a specific threshold value, then the control unit 3 automatically reduces the requested generator voltage to relieve the generator 1.
  • Fig. 2 shows the diagram of a heater of the screed of a second, according to the invention road paver with associated control for performing the inventive method.
  • This heater differs from the in Fig. 1 shown merely in that they instead of the simple circuit breaker for each heating element group 2a-2x a switching unit 13a-13x, with which the respective group 2a-2x by means of a switching command S from the control unit 3 either in star or delta connection with the three phases L1, L2, L3 of the alternator 1 can be connected or can be separated from the generator 1.
  • the heating element groups 2a-2x can be used to further reduce the heating power not only intermittently on and off by the control unit 3 by means of the respective power switch 8a-8x, as in the heater according to Fig. 1 the case is, but also alternately operated in star and delta connection, which preferably takes place in alternating cycles, or even exclusively in star connection, depending on how much heating power is to be made available.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Machines (AREA)
EP13707801.0A 2013-02-14 2013-02-14 Verfahren zum beheizen einer einbaubohle eines strassenfertigers Not-in-force EP2956584B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2013/000031 WO2014124545A1 (de) 2013-02-14 2013-02-14 Verfahren zum beheizen einer einbaubohle eines strassenfertigers

Publications (2)

Publication Number Publication Date
EP2956584A1 EP2956584A1 (de) 2015-12-23
EP2956584B1 true EP2956584B1 (de) 2017-04-12

Family

ID=47832832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13707801.0A Not-in-force EP2956584B1 (de) 2013-02-14 2013-02-14 Verfahren zum beheizen einer einbaubohle eines strassenfertigers

Country Status (5)

Country Link
US (1) US20150361626A1 (pt)
EP (1) EP2956584B1 (pt)
CN (1) CN105189870A (pt)
BR (1) BR112015018038A2 (pt)
WO (1) WO2014124545A1 (pt)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3413460A1 (de) * 2017-06-09 2018-12-12 KW-Generator GmbH & Co. KG Baumaschine, insbesondere strassenbaumaschine, wie strassenfertiger
DE102021120008A1 (de) 2021-08-02 2023-02-02 Generator.Technik.Systeme Gmbh & Co. Kg Straßenbaumaschine, Drehstromgenerator sowie Verfahren zum Betrieb der Straßenbaumaschine und zur Dimensionierung des Drehstromgenerators

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015012298A1 (de) 2015-09-23 2017-03-23 Abg Allgemeine Baumaschinen-Gesellschaft Mbh Verfahren zum Betrieb eines selbstfahrenden Straßenfertigers und Straßenfertiger hierfür
EP3382099B1 (de) 2017-03-29 2019-03-27 Joseph Vögele AG Strassenfertiger mit heizelement für eine einbaubohle
PL3527721T3 (pl) 2018-02-19 2021-05-04 Joseph Vögele AG Wykańczarka z regulatorami mocy do elektrycznych urządzeń grzejnych deski równającej
EP3569764B1 (de) * 2018-05-15 2021-07-28 Joseph Vögele AG Verfahren zum vorausschauenden steuern eines strassenfertigers
EP4116493A1 (de) 2021-07-07 2023-01-11 Joseph Vögele AG Strassenfertiger mit heizeinrichtung sowie verfahren

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DE3303452C2 (de) * 1983-02-02 1986-03-13 Herbert Kannegiesser Gmbh + Co, 4973 Vlotho Heizeinrichtung für eine Vorrichtung zum Verkleben flächenförmiger Textilstücke
EP1165892A4 (en) * 1999-02-11 2004-10-06 Ingersoll Rand Co CONTROL DEVICE FOR THE HEATING SYSTEM OF A PULLING BAR
DE19912248A1 (de) * 1999-03-18 2000-09-21 Voegele Ag J Verfahren zum Beheizen der Einbaubohle eines Straßenfertigers, sowie elektrische Heizeinrichtung
US7641419B1 (en) * 2001-09-24 2010-01-05 Caterpillar Paving Products Inc Heating control system for a screed
ES2242699T3 (es) * 2001-11-28 2005-11-16 Ipsen International Gmbh Procedimiento para el calentamiento electrico de hornos para el tratamiento termico de piezas de trabajo metalicas.
PL2256247T5 (pl) * 2009-05-25 2018-02-28 Joseph Vögele AG Wykańczarka
WO2011135846A1 (ja) * 2010-04-27 2011-11-03 範多機械株式会社 道路舗装機械
US8297875B1 (en) * 2011-06-21 2012-10-30 Caterpillar Paving Products Inc. Screed heating control
DE202011108347U1 (de) * 2011-11-25 2012-01-11 Joseph Vögele AG Beheizter Materialbunker

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3413460A1 (de) * 2017-06-09 2018-12-12 KW-Generator GmbH & Co. KG Baumaschine, insbesondere strassenbaumaschine, wie strassenfertiger
DE102017209805A1 (de) * 2017-06-09 2018-12-13 Kw-Generator Gmbh & Co. Kg Baumaschine, insbesondere Straßenbaumaschine, wie Straßenfertiger
DE102021120008A1 (de) 2021-08-02 2023-02-02 Generator.Technik.Systeme Gmbh & Co. Kg Straßenbaumaschine, Drehstromgenerator sowie Verfahren zum Betrieb der Straßenbaumaschine und zur Dimensionierung des Drehstromgenerators

Also Published As

Publication number Publication date
EP2956584A1 (de) 2015-12-23
BR112015018038A2 (pt) 2017-07-11
CN105189870A (zh) 2015-12-23
WO2014124545A1 (de) 2014-08-21
US20150361626A1 (en) 2015-12-17

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