EP2337642A2 - Dispositif de décalaminage pourvu d'un entraînement de pompe à régime variable - Google Patents

Dispositif de décalaminage pourvu d'un entraînement de pompe à régime variable

Info

Publication number
EP2337642A2
EP2337642A2 EP09782752A EP09782752A EP2337642A2 EP 2337642 A2 EP2337642 A2 EP 2337642A2 EP 09782752 A EP09782752 A EP 09782752A EP 09782752 A EP09782752 A EP 09782752A EP 2337642 A2 EP2337642 A2 EP 2337642A2
Authority
EP
European Patent Office
Prior art keywords
descaling
pressure
electric motor
nozzles
liquid
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.)
Granted
Application number
EP09782752A
Other languages
German (de)
English (en)
Other versions
EP2337642B2 (fr
EP2337642B1 (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
Original Assignee
Siemens AG
Siemens Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=40010829&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2337642(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 present invention relates to a descaling device
  • the descaling device has at least one Entzun- range
  • Descaling agent can be sprayed onto a metal strand to be descaled under high pressure
  • nozzles are connected to a high-pressure line system, via which the liquid descaling agent can be fed to the nozzles,
  • a pump driven by an electric motor is connected to the high-pressure line system, by means of which the liquid descaling device can be conveyed from a low-pressure supply network under high pressure into the high-pressure line system,
  • 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 matters- means per unit time.
  • the nozzles in the at least one descaling area are switched through, ie spray the liquid descaling agent onto the metal strand to be descaled, this is not a problem.
  • the nozzles are switched off, the pumped quantity of the descaling agent has to be "consumed" elsewhere -Storage- device still has absorption capacity, the subsidized Entzu matterssstoff is taken into the high-pressure storage device. From there, it will be fed back into the high-pressure piping system at a later date.
  • 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 aforementioned type is developed in such a way that the electric motor is connected to an electrical supply network via a converter, that the converter is connected in terms of control technology to a control device and that the control device is designed such that it controls the converter in such a way that the Electric motor is operated at variable speed.
  • 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 costs of the descaling device according to the invention are greater than the purchase costs of a descaling device of the prior art.
  • the converter is designed as a DC link converter.
  • the electric motor can be operated 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.
  • control device is designed such that it controls the converter as a function of at least one of the following variables:
  • FIG. 1 shows schematically a plant of the metal-producing industry
  • FIG. 2 shows an electric motor and its connection to an electrical supply network
  • FIG. 3 shows by way of example a speed curve as a function of FIG
  • FIG. 4 shows schematically the operation of a control device.
  • a plant of the metal-producing industry has various plant components.
  • Are purely exemplary 1 shows a continuous casting plant 1 and a rolling mill 2.
  • 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 Supershafte 4 to 6 are independently operable. According to the illustration of FIG. 1, this is achieved in that a respective main valve 10 is assigned to each descaling region 4 to 6, by means of which the supply of the descaling agent 8 to the respective descaling region 4 to 6 can be 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 desaturation 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.
  • the descaling device E is operated essentially as follows:
  • the operation of the descaling areas 4 to 6 takes place intermittently. For each descaling region 4 to 6, therefore, there is a phase during which the liquid descaling agent 8 is sprayed onto the metal strand 3. Likewise, there is a phase during which the liquid descaling agent 8 is not sprayed onto the metal strand 3.
  • 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 electric motor 13 and with it the pump 11 are operated at a constant speed.
  • a return valve 15 must be opened, so that funded by the pump 11 Entzu concerningsstoff 8 from the high-pressure line system 9 and the high pressure Memory device 14 can be deducted.
  • 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 rotary power network). 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 converter 17 is designed as a DC link converter in accordance with the embodiment shown in FIG. 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.
  • 3 shows purely by way of example a profile 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, ie the electric motor 13 and the pump 11 rotate continuously, the wear can be minimized.
  • the control device 18 is usually designed as a software programmable control device. It can a drive state S of the inverter 17, which in turn the
  • Speed n of the electric motor 13 determines determined in various ways.
  • the control device 18 determines the control state S based on a Ist divellgrades 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 is more cost-effective to operate 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)

Abstract

L'invention concerne un dispositif de décalaminage (E) présentant au moins une zone de décalaminage (4 à 6). Cette ou ces zones de décalaminage (4 à 6) comportent un certain nombre de buses (7) au moyen desquelles un agent de décalaminage liquide (8) peut être pulvérisé sous haute pression sur une barre de métal (3) à décalaminer. Les buses (7) sont reliées à un système de canalisations à haute pression (9) par l'intermédiaire duquel l'agent de décalaminage liquide (8) peut être acheminé jusqu'aux buses (7). Une pompe (11) entraînée par un moteur électrique (13) est reliée au système de canalisations à haute pression (9), cette pompe (11) servant à transporter l'agent de décalaminage liquide (8) sous haute pression dans le système de canalisations à haute pression (9) depuis un réseau d'alimentation à basse pression (12). Un dispositif d'accumulation haute pression (14) permettant d'accumuler l'agent de décalaminage liquide (8) sous haute pression est relié au système de canalisations à haute pression (9). Le moteur électrique (13) est relié à un réseau d'alimentation électrique (16) par l'intermédiaire d'un convertisseur (17). Ce convertisseur (17) est relié à un dispositif de commande (18) à des fins de commande. Le dispositif de commande (18) est conçu pour commander le convertisseur (17) de telle sorte que le moteur électrique (13) puisse fonctionner à un régime variable (n).
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 true EP2337642A2 (fr) 2011-06-29
EP2337642B1 EP2337642B1 (fr) 2013-11-13
EP2337642B2 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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Also Published As

Publication number Publication date
CN102176984A (zh) 2011-09-07
EP2337642B2 (fr) 2017-07-26
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

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