EP2337642B2 - Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable - Google Patents

Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable Download PDF

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Publication number
EP2337642B2
EP2337642B2 EP09782752.1A EP09782752A EP2337642B2 EP 2337642 B2 EP2337642 B2 EP 2337642B2 EP 09782752 A EP09782752 A EP 09782752A EP 2337642 B2 EP2337642 B2 EP 2337642B2
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EP
European Patent Office
Prior art keywords
descaling
pressure
converter
electric motor
nozzles
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.)
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Application number
EP09782752.1A
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German (de)
English (en)
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EP2337642B1 (fr
EP2337642A2 (fr
Inventor
Guido Bodden
Jochen Wermke
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.)
Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
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Publication date
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Application filed by Primetals Technologies Germany GmbH filed Critical Primetals Technologies Germany GmbH
Priority to PL09782752T priority Critical patent/PL2337642T3/pl
Priority to EP09782752.1A priority patent/EP2337642B2/fr
Publication of EP2337642A2 publication Critical patent/EP2337642A2/fr
Application granted granted Critical
Publication of EP2337642B1 publication Critical patent/EP2337642B1/fr
Publication of EP2337642B2 publication Critical patent/EP2337642B2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
    • B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically

Definitions

  • the pump is operated by means of the electric motor continuously and at constant speed. This is associated with a constant flow rate of the Entzu mattersffens per unit time.
  • the nozzles in the at least one descaling area are switched through, that is to say spray the liquid descaling agent onto the metal strand to be descaled, this is not a problem.
  • the delivered quantity of descaling agent must otherwise be "consumed”. If the high-pressure storage device still has absorption capacity, the subsidized descaling agent is taken over into the high-pressure storage device. From there, it will be fed back into the high-pressure piping system at a later date. In contrast, when the high-pressure storage device is filled, a return valve is opened in the prior art. The descaling agent is returned to the low-pressure supply network via the return valve.
  • the object of the present invention is to develop a descaling device of the type mentioned in such a way that it is more economical to operate.
  • a descaling device of the type mentioned above is further developed in such a way that the electric motor is connected via a converter to an electrical supply network, that the converter is connected to a control device and that the control device is designed such that it controls the converter so that the Electric motor is operated at variable speed. Furthermore, the control device determines a drive state of the converter, which in turn determines the speed of the electric motor, based on a Ist Stirllgrades the high-pressure storage device in conjunction with a Sollyogllgrad the high-pressure storage device determines the Sollyogllgrad on the basis of other variables as a function of time and regulates the Ist spallgrad on the respective Soll Stahl. Alternatively or additionally, when determining the activation state, the control device takes into account a total load of the electrical supply network and / or a total load of the low-pressure supply network.
  • the inventive design significantly reduces the operating costs of the descaling device. There is therefore an economical operation of the descaling device according to the invention, although the initial cost of the descaling device according to the invention is greater than the purchase cost of a descaling device of the prior art.
  • the converter is designed as a DC link converter.
  • the electric motor is operable with greater dynamics.
  • control device is designed such that it controls the inverter such that the variable speed always remains above a minimum speed, which in turn is greater than zero.
  • FIG. 1 For example, a plant of the metal-producing industry has various plant components. Purely by way of example are in FIG. 1 a continuous casting 1 and a rolling mill 2 shown. In the continuous casting a metal strand 3 is generated. The metal strand 3 is rolled in the rolling mill 2.
  • the metal strand 3 is formed in many cases as a steel strand. However, this is not mandatory. Alternatively, the metal strand 3 could be formed, for example, as an aluminum strand, as a copper strand, as a brass strand, etc. Furthermore, the metal strand 3 is often formed as a metal strip. However, this is not absolutely necessary. Alternatively, the metal strand 3 may have, for example, a rod shape or a tubular shape.
  • the metal strand 3 is made of steel and is band-shaped, the metal strand 3 is thus designed as a steel strip, the plant of the metal-producing industry is often designed as a heavy plate mill.
  • a descaling device E is present.
  • the descaling device E has Entzu precises Suitee 4 to 6.
  • the Entzu concernings Colour 4 is the continuous casting 1 downstream.
  • the Entzu concernings Society 5 is upstream of the rolling mill 2.
  • the Entzu concernings Society 6 is downstream of the rolling mill 2.
  • Each descaling section 4 to 6 has a number of nozzles 7 arranged in the respective descaling section 4 to 6.
  • a liquid descaling agent 8 is sprayed onto the metal strand 3 under high pressure in order to desalt the metal strand 3.
  • the liquid descaling agent 8 - usually water with or without additives - is supplied to the nozzles 7 via a high-pressure line system 9, to which the nozzles 7 are connected.
  • the Entzu matters Schemee 4 to 6 are independently operable. As shown by FIG. 1 This is achieved in that each Entzu concernings Scheme 4 to 6 each have a main valve 10 is assigned, by means of which the supply of the Entzu mecanicsstoffs 8 to the respective Entzu concernings Scheme 4 to 6 is switched on and off.
  • the main valves 10 are independently switchable.
  • each descaling region 4 to 6 has a multiplicity of groups of nozzles 7, which can each be switched via a separate valve independently of all the other nozzles of the same and of the other descaling regions 4 to 6.
  • this is in the context of the present invention of minor importance, so apart from a representation of the individual valves per group of nozzles 7.
  • the high-pressure line system 9 is fed via a pump 11, which is connected to the high-pressure line system 9.
  • the liquid descaler 8 is conveyed from a low-pressure supply network 12 under high pressure into the high-pressure line system 9.
  • the pump 11 is connected for this purpose with an electric motor 13 which drives the pump 11.
  • a high-pressure storage device 14 is further connected. From the high-pressure storage device 14, the high-pressure liquid Entzu matterssstoff 8 is bufferable.
  • a maximum delivery rate of the pump 11 is designed such that the maximum delivery rate is less than the maximum demand for Entzu precisesstoff 8.
  • the maximum capacity of the pump 11 and the capacity of the high-pressure storage device 14 are coordinated so that the need for liquid Entzu concerningsstoff 8, which is not covered by the maximum capacity of the pump 11, can be removed from the high-pressure storage device 14.
  • the pump 11 is driven by the electric motor 13, wherein the shortage of liquid descaling 8 is removed from the high-pressure storage device 14.
  • the high-pressure storage device 14 is replenished.
  • the prior art electric motor 13 Since the prior art electric motor 13 is operated continuously and at a constant speed, it is sufficient in the prior art for the electric motor 13 to be connected directly to an electrical supply network 16 (usually a three-phase system). In the embodiment according to the invention, however, the electric motor 13 is connected via an inverter 17 to the electrical supply network 16.
  • the inverter 17 may be formed in individual cases as a direct converter. However, it is preferred that the inverter 17 according to the in FIG. 2 shown embodiment is designed as a DC link converter. In this embodiment, the inverter 17 and with it the electric motor 13 with higher dynamics are operable.
  • the inverter 17 is connected to a control device 18 control technology.
  • the control device 18 is designed such that it controls the converter 17 such that the electric motor 13 is operated at a variable speed n.
  • FIG. 3 purely by way of example shows a curve of the rotational speed n of the electric motor 13 as a function of the time t. Obviously, the speed n varies over the time t. Regardless of the actual value of the rotational speed n, however, the rotational speed n is always above a minimum rotational speed nmin, which in turn is greater than zero. Furthermore, the speed n always remains below a maximum speed nmax. In particular, due to the fact that the rotational speed n always remains above the minimum rotational speed nmin, the electric motor 13 and the pump 11 thus rotate continuously, the wear can be minimized.
  • the control device 18 is usually designed as a software programmable control device. It can determine a drive state S of the converter 17, which in turn determines the speed n of the electric motor 13, in various ways.
  • the control device 18 determines the control state S based on a Ist Stahlllgrades F of the high-pressure storage device 14 in conjunction with a fixed Soll Shellgrad F * of the high-pressure storage device 14.
  • the controller 18 can realize a two- or multi-point controller. It is better, however, if the control device 18 takes into account the Ist Stahlllgrad F and other variables in determining the driving state.
  • control device 18 can use the other variables to determine the desired fill level F * as a function of the time t and to regulate the actual fill level F to the respective desired fill level F *.
  • control device 18 can determine the desired fill level F * as a function of an operating state B of at least one of the descaling regions 4 to 6.
  • the size of the time interval ⁇ t can also be taken into account in determining the desired fill level F *. From a cost point of view, it may also be useful to take into account a total load I of the electrical supply network 16 and / or a total load W of the low-pressure supply network 12 when determining the drive state S and / or the desired fill level F *.
  • the present invention has many advantages.
  • the descaling device E according to the invention can be operated more cost-effectively than a comparable descaling device of the prior art.
  • the current load of the electrical supply network 16 is smaller than in the prior art.
  • the energy yield is improved.
  • the return valve 15 can be made smaller than is possible in the prior art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Claims (3)

  1. Dispositif de décapage,
    - dans lequel le dispositif de décapage présente au moins un secteur de décapage (4 à 6),
    - dans lequel, dans le au moins un secteur de décapage (4 à 6) sont agencées une pluralité de buses (7), au moyen desquelles un produit décapant liquide (8) est vaporisé sous haute pression sur une billette métallique (3) à décaper,
    - dans lequel les buses (7) sont raccordées à un système de conduite haute pression (9) par l'intermédiaire duquel le produit décapant liquide (8) est acheminé jusqu'aux buses (7),
    - dans lequel, une pompe (11), entraînée par un moteur électrique (13) et au moyen de laquelle le produit décapant liquide (8) peut être transporté sous haute pression dans le système de conduite haute pression (9) à partir d'un réseau d'alimentation basse pression (12), est raccordée au système de conduite haute pression (9),
    - dans lequel, un dispositif accumulateur haute pression (14), grâce auquel le produit décapant liquide (8) se trouvant sous haute pression peut être stocké temporairement, est raccordé au système de conduite haute pression (9),
    caractérisé en ce que
    le moteur électrique (13) est raccordé à un réseau d'alimentation électrique (16) par l'intermédiaire d'un convertisseur (17), ledit convertisseur (17) est relié à un dispositif de commande (18) en utilisant des procédés de commande, le dispositif de commande (18) est réalisé de telle manière qu'il excite le convertisseur (17) de sorte que le moteur électrique (13) est entraîné avec un régime variable (n), et le dispositif de commande (18)
    - détermine un état d'excitation (S) du convertisseur (17), qui pour sa part définit le régime (n) du moteur électrique (13), à l'aide d'un degré de remplissage effectif (F) du dispositif accumulateur haute pression (14) en lien avec un degré de remplissage théorique (F*) du dispositif accumulateur haute pression (14), détermine le degré de remplissage théorique (F*) à l'aide d'autres grandeurs en fonction du temps (t), et règle le degré de remplissage effectif (F) sur le degré de remplissage théorique (F*) respectif, et/ou
    - prend en compte une charge totale (I) du réseau d'alimentation électrique (16) lors de la détermination de l'état de commande (S) et/ou
    - prend en compte une charge totale (W) du réseau d' alimentation basse pression (12) lors de la détermination de l'état d'excitation (S).
  2. Dispositif de décapage selon la revendication 1,
    caractérisé en ce que,
    le convertisseur (17) est réalisé sous forme de circuit intermédiaire.
  3. Dispositif de décapage selon la revendication 1 ou 2,
    caractérisé en ce que,
    le dispositif de commande (18) est réalisé de telle manière qu'il régule le convertisseur (17) de telle manière que le régime variable (n) reste constamment au-dessus d'un régime minimal (nmin) qui est pour sa part supérieur à zéro.
EP09782752.1A 2008-10-07 2009-09-08 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable Active EP2337642B2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL09782752T PL2337642T3 (pl) 2008-10-07 2009-09-08 Urządzenie do usuwania zgorzeliny z napędem pompy o zmiennej prędkości obrotowej
EP09782752.1A EP2337642B2 (fr) 2008-10-07 2009-09-08 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP08017562A EP2174729A1 (fr) 2008-10-07 2008-10-07 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable
EP09782752.1A EP2337642B2 (fr) 2008-10-07 2009-09-08 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable
PCT/EP2009/061617 WO2010040614A2 (fr) 2008-10-07 2009-09-08 Dispositif de décalaminage pourvu d'un entraînement de pompe à régime variable

Publications (3)

Publication Number Publication Date
EP2337642A2 EP2337642A2 (fr) 2011-06-29
EP2337642B1 EP2337642B1 (fr) 2013-11-13
EP2337642B2 true EP2337642B2 (fr) 2017-07-26

Family

ID=40010829

Family Applications (2)

Application Number Title Priority Date Filing Date
EP08017562A Withdrawn EP2174729A1 (fr) 2008-10-07 2008-10-07 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable
EP09782752.1A Active EP2337642B2 (fr) 2008-10-07 2009-09-08 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP08017562A Withdrawn EP2174729A1 (fr) 2008-10-07 2008-10-07 Dispositif d'allumage doté d'un entraînement de pompe à vitesse de rotation variable

Country Status (4)

Country Link
EP (2) EP2174729A1 (fr)
CN (1) CN102176984B (fr)
PL (1) PL2337642T3 (fr)
WO (1) WO2010040614A2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2420329A1 (fr) * 2010-08-18 2012-02-22 Siemens Aktiengesellschaft Installation d'allumage
CN102155394A (zh) * 2011-04-08 2011-08-17 本溪水泵有限责任公司 安装在除鳞泵液缸体下部的气控装置
CN103191937B (zh) * 2012-01-10 2014-12-03 宝山钢铁股份有限公司 热连轧机分段除鳞控制方法
JP5790528B2 (ja) * 2012-02-09 2015-10-07 東芝三菱電機産業システム株式会社 圧延デスケーリング装置の制御装置
CN102615059B (zh) * 2012-03-27 2014-03-05 宝山钢铁股份有限公司 平整机用高压水枪清洗方法
CN102755997A (zh) * 2012-07-26 2012-10-31 宝钢不锈钢有限公司 热轧高压除鳞系统的安全节能控制装置及其控制方法
CN104209354B (zh) * 2014-07-17 2015-12-30 镇江金昶坤能源设备有限公司 轧钢除鳞系统的喷水泵节能控制方法
CN105268687B (zh) * 2015-11-12 2017-12-08 国网新疆电力公司和田供电公司 高压供电绝缘子清洗装置及使用方法
PE20190294A1 (es) * 2016-07-29 2019-02-28 Siemens Ag Procedimiento para el direccionamiento de un motor para arrancar un molino
EP3599037A1 (fr) 2018-07-25 2020-01-29 Primetals Technologies Germany GmbH Section de refroidissement à réglage de flux de liquide de refroidissement à l'aide des pompes
CN108906749B (zh) * 2018-09-12 2021-02-26 马鞍山钢铁股份有限公司 钢坯除鳞机高压水泵的控制方法
CN111069148A (zh) * 2019-12-19 2020-04-28 龙游龙辉电镀有限公司 一种接地棒用清洗设备及其清洗方法
CN111715711B (zh) * 2020-05-06 2022-03-29 唐山钢铁集团有限责任公司 一种热轧板带产线高效除鳞控制方法

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DE4328303A1 (de) † 1992-12-23 1994-06-30 Juergen Gaydoul Einrichtung zum Entzundern von warmem Walzgut

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DE2605011C2 (de) * 1976-02-10 1978-04-13 Fried. Krupp Huettenwerke Ag, 4630 Bochum Verfahren und Vorrichtung zum Entzundern beim kontinuierlichen Umformen, insbesondere Walzen, von langgestrecktem, metallischem Gut, insbesondere Stahl
DE4330519B4 (de) * 1993-09-09 2004-08-05 Sms Demag Ag Entzunderungsvorrichtung
JP3755942B2 (ja) * 1996-10-22 2006-03-15 株式会社荏原電産 ポンプ用インバータユニット
CN1177655C (zh) * 2001-09-20 2004-12-01 长沙矿山研究院 电液控卸荷阀高压水热态除鳞系统
CN100563862C (zh) * 2007-11-12 2009-12-02 二重集团（德阳）重型装备股份有限公司 热连轧生产线的高压水除鳞系统

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
DE4328303A1 (de) † 1992-12-23 1994-06-30 Juergen Gaydoul Einrichtung zum Entzundern von warmem Walzgut

Also Published As

Publication number Publication date
CN102176984A (zh) 2011-09-07
WO2010040614A3 (fr) 2010-07-15
WO2010040614A2 (fr) 2010-04-15
EP2174729A1 (fr) 2010-04-14
CN102176984B (zh) 2013-11-20
PL2337642T3 (pl) 2014-04-30
EP2337642B1 (fr) 2013-11-13
EP2337642A2 (fr) 2011-06-29

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