WO2018134965A1 - Dispositif de surveillance d'isolation pour pièces de transport de produits laminés - Google Patents

Dispositif de surveillance d'isolation pour pièces de transport de produits laminés Download PDF

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Publication number
WO2018134965A1
WO2018134965A1 PCT/JP2017/001923 JP2017001923W WO2018134965A1 WO 2018134965 A1 WO2018134965 A1 WO 2018134965A1 JP 2017001923 W JP2017001923 W JP 2017001923W WO 2018134965 A1 WO2018134965 A1 WO 2018134965A1
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WO
WIPO (PCT)
Prior art keywords
insulation
measurement
rolled material
insulating
monitoring device
Prior art date
Application number
PCT/JP2017/001923
Other languages
English (en)
Japanese (ja)
Inventor
康治 堂上
英二 橋本
Original Assignee
東芝三菱電機産業システム株式会社
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 東芝三菱電機産業システム株式会社 filed Critical 東芝三菱電機産業システム株式会社
Priority to PCT/JP2017/001923 priority Critical patent/WO2018134965A1/fr
Priority to TW106107964A priority patent/TWI624670B/zh
Publication of WO2018134965A1 publication Critical patent/WO2018134965A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
    • B65G43/02—Control devices, e.g. for safety, warning or fault-correcting detecting dangerous physical condition of load carriers, e.g. for interrupting the drive in the event of overheating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • 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
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications

Definitions

  • the present invention relates to an insulation monitoring device for a rolled material conveyance unit.
  • a rolled material is heated to a temperature that can be rolled in a heating furnace, and is roughly rolled by a roughing mill and formed into a state called a rough bar. Furthermore, a product formed into a desired plate thickness is obtained by applying a rough bar to a finishing mill.
  • an induction heating device is installed for the purpose of raising the temperature and soaking the coarse bar.
  • the temperature of the both ends of the coarse bar in the width direction is particularly likely to decrease, and therefore edge heaters are installed to raise the temperature of both ends.
  • induction heating devices are arranged at both ends of the coarse bar as edge heaters.
  • An eddy current is generated in the coarse bar by interlinking the magnetic flux generated from the heating coil of the induction heating device with the coarse bar, and the coarse bar is heated by the Joule heat generated by the eddy current.
  • the table roll is insulated, the generation of shaft current can be suppressed. Therefore, it is effective to monitor the insulation state of the table roll on a daily or regular basis.
  • an insulation monitoring device that monitors the insulation state of such a table roll (insulation transport unit) safely and accurately is provided.
  • the first voltage dividing circuit is configured to include the insulation resistance of the insulating conveyance unit disposed before and after the induction heating device that heats the rolled material as one of the resistors that divides the power supply voltage for measurement.
  • An insulation monitoring device for a rolled material conveying section comprising: a manual measurement terminal box for performing the measurement, and an automatic measurement circuit constituting a second voltage dividing circuit including the insulation resistance as one of resistors for dividing the measurement power supply voltage.
  • the schematic diagram which shows the structure of the insulation monitoring apparatus of embodiment The schematic diagram of an insulation conveyance part.
  • FIG. 1 is a schematic diagram illustrating a configuration of an insulation monitoring apparatus according to an embodiment.
  • the insulation monitoring device of the embodiment includes a manual measurement terminal box 5 and an automatic measurement circuit 50.
  • the manual measurement terminal box 5 constitutes a first voltage dividing circuit
  • the automatic measuring circuit 50 constitutes a second voltage dividing circuit.
  • FIG. 7 is a schematic diagram of a rolled material conveyance line according to the embodiment.
  • FIG. 7 shows, for example, a conveyance line between a rough rolling mill and a finish rolling mill in a hot rolling line.
  • the rolled material (rough bar) 3 after the rough rolling is transported from the right to the left in FIG. 7 on the plurality of transport units 20a and 20b.
  • the induction heating device 10 is arranged on the transfer line. In FIG. 7, two induction heating apparatuses 10 are shown, for example.
  • the induction heating device 10 heats both ends of the rolled material (coarse bar) 3 in the width direction (depth direction on the paper surface).
  • the plurality of transport units 20a and 20b include a plurality of insulating transport units 20a disposed before and after the induction heating device 10 (upstream and downstream in the transport direction). In FIG. 7, for example, five insulating conveyance units 20 a are arranged before and after the induction heating device 10.
  • FIG. 2 is a schematic diagram of the insulating conveyance unit 20a.
  • the insulating conveyance unit 20a includes a table roll 4, a bearing 1 that rotatably supports the table roll 4, and a support unit 21 that supports the bearing 1 on the ground.
  • a plurality of table rolls 4 are arranged apart from each other in the conveying direction of the rolled material 3.
  • the table roll 4, the bearing 1, and the support portion 21 are made of metal having sufficient strength for transporting the rolled material 3.
  • the insulating plate 2 is sandwiched between the support portions 21.
  • the insulating plate 2 insulates between the ground and the table roll 4.
  • Each end of one table roll 4 is supported on the ground via the bearing 1 and the support portion 21.
  • the insulating plate 2 is sandwiched between the support portions 21 at both ends.
  • a transport unit 20b having no insulating plate 2 is arranged as shown in FIG.
  • FIG. 3 is a schematic diagram showing the connection between the manual measurement terminal box 5 and the insulating conveyance section 20a.
  • the manual measurement terminal box 5 includes a tester 6 and a plurality of measurement terminals 7.
  • the tester 6 may not be permanently installed in the manual measurement terminal box 5 but may be brought to the manual measurement terminal box 5 by the measurer during measurement.
  • the manual measurement terminal box 5 is installed in, for example, a safety passage or the vicinity thereof, which is a place away from the transfer area.
  • the wiring 90 is connected to the insulation conveyance part 20a so that the insulation board 2 pinched
  • the wiring 90 is laid to the manual measurement terminal box 5 and connected to the measurement terminal 7.
  • a plurality of measurement terminals 7 are provided corresponding to locations (a plurality of insulating plate installation portions) for insulation measurement.
  • a plurality of measurement terminals 7 electrically connected to the plurality of insulated transfer units 20a are collected in a manual measurement terminal box 5 installed at a location away from the transfer area.
  • the measurer can perform insulation measurement using the tester 6 without leaving the manual measurement terminal box 5. The measurer can safely measure insulation even when the rolled material 3 is being conveyed.
  • the manual measurement terminal box 5 includes a first voltage dividing circuit including a measurement power supply (battery inside the tester 6), a resistance for dividing the power supply voltage (resistance inside the tester 6), and an insulation resistance of the insulating conveyance unit 20a. It is composed.
  • FIG. 4 is a circuit diagram showing the concept of the automatic measurement circuit 50.
  • the automatic measurement circuit 50 follows a general analog tester circuit. This is because it is common to use a tester for manual measurement, and it is preferable for the measurer to manage and evaluate measured values from the same perspective, whether manual or automatic. It is.
  • Measurement is performed with a voltage dividing circuit that uses a dry cell inside the tester to pass a current through the magnification resistance inside the tester. A voltage corresponding to the current flowing through the magnification resistor inside the tester appears. A current corresponding to this voltage and the resistance inside the tester is generated to move the meter. The number of ⁇ is assigned to the scale according to this current.
  • FIG. 5 is a schematic diagram of the insulation monitoring apparatus excluding the manual measurement terminal box 5 from FIG.
  • the automatic measurement circuit 50 constitutes a second voltage dividing circuit including a measurement power supply (DC power supply), a resistance R1 that divides the power supply voltage VDC , an insulation resistance R2 of the insulating conveyance unit 20a, and an analog input unit 8. is doing.
  • the insulation monitoring device further includes a control unit 9 and a display device 11.
  • the resistance value R3 of the analog input unit 8 is generally very high and can be ignored in the calculation formula.
  • the controller 9 calculates the resistance value Rn from the voltage Vn input to the analog input unit 8 in the automatic measuring circuit 50 and the above-described calculation formula Vn / (V DC -Vn) ⁇ R1.
  • the control unit 9 can output (screen display) the calculated value to the display device 11 as an insulation resistance value for evaluating the insulation state of the insulation transport unit 20a.
  • control unit 9 can compare the insulation resistance value obtained from the automatic measurement circuit 50 with the management value and output the comparison result to the display device 11.
  • FIG. 9 is a graph showing an example of data processing of insulation monitoring measurement data by the control unit 9.
  • FIG. 9 shows the time variation of the insulation resistance value.
  • the control value threshold value
  • the table roll 4 of the insulating conveyance unit 20a disposed before and after the induction heating device 10 in the rolling line is internally water-cooled. This is to prevent the outside water for cooling the table roll from being applied to the induction heating device 10 in order to keep the insulation of the induction heating device 10 which is an electrical product. For this reason, the internal water-cooled table roll 4 disposed before and after the induction heating device 10 cannot obtain an insulation resistance value of a megohm level required for a general electric product, and is a few kilohm level. Therefore, the management value of the insulation resistance can be set, for example, from 1 k ⁇ to 2 k ⁇ .
  • an induction current indicated by a broken line in FIG. 6B flows through the rolled material 3 to the ground.
  • the induction current due to the operation of the induction heating device 10 or the rolling material 3 riding on the table roll 4 to be measured is a disturbance that lowers the measurement accuracy.
  • a measurement person avoids measurement disturbance by performing a measurement by visually checking that the induction heating apparatus 10 is stopped and the rolled material 3 is not on the table roll 4 to be measured. Can do.
  • the state where the induction heating device 10 is stopped and the rolled material 3 is not on the table roll 4 to be measured can be provided as logic and reflected in the measurement command.
  • control unit 9 receives the detection of the off state of the induction heating device 10 and the state in which the rolled material 3 is not on the table roll 4 to be measured, and the insulating conveyance unit to be measured by the automatic measurement circuit 50. Measurement of the insulation resistance of 20a is performed.
  • rolling material detection sensors 13 a and 13 b and a measuring roll (pulse counter) 14 are installed in the rolling line in order to perform conveyance control of the rolled material 3.
  • the measuring roll 14 calculates the conveyance speed of the rolled material 3.
  • the rolling material detection sensors 13a and 13b are, for example, MD (Hot Metal Detector) or a thermometer.
  • FIG. 7 illustrates five insulated table rolls (insulation rolls) 4. Then, No. 1, No. 2, No. 3, No. 4, No. 5 are given to the five insulating rolls 4 in order from the upstream side in the conveying direction of the rolled material 3.
  • An entrance-side rolled material detection sensor 13a is installed in the vicinity of the most upstream insulating roll 4 to which No. 1 is attached.
  • An exit-side rolled material detection sensor 13b is installed in the vicinity of the most downstream insulating roll 4 to which No. 5 is attached.
  • the control unit 9 detects that the rolled material 3 is not on the insulating roll 4 to be measured, and that the induction heating device 10 is not in operation, and performs measurement. Outputs a command.
  • the connection points (switches) SW1, SW2, and SW3 shown in FIG. 5 are turned on, and automatic resistance measurement of the insulation transfer unit 20a to be measured is performed.
  • FIGS. 8A and 8B are tables showing conditions for executing insulation monitoring measurement (conditions for outputting measurement commands).
  • FIG. 8A shows common conditions for the five insulating rolls 4.
  • FIG. 8B shows a case where conditioning is performed for each insulating roll 4.
  • the rolled material 3 Since there are many cases where a plurality of rolled materials (coarse bars) 3 are transported one after another without putting a gap on the characteristics of the rolling operation, the rolled material 3 is not on any of the insulating rolls 4. It may be difficult.
  • the measurement timing can be sequentially set from the upstream insulating roll 4 through which the rolled material 3 has already passed.
  • the tail end of the rolled material 3 has passed the insulating roll 4 of No. 1 by the off detection of the detection sensor 13a on the entry side, the on detection of the detection sensor 13b on the exit side, and the distance calculation by the measuring roll 14. Can be detected.
  • the controller 9 turns on the measurement command for the No. 1 insulating roll 4.
  • the insulation measurement of the insulating roll 4 can be performed even during the rolling operation without stopping the rolling operation.
  • the insulation monitoring device and the monitoring method according to the embodiment described above it is possible to grasp the decreasing tendency of the insulation resistance of the table roll 4 in time series with a very simple device configuration. This can be utilized for an efficient plan of periodic inspection around the table roll 4, frequency of cleaning, and work amount. Moreover, it can be expected to predict in advance the possibility of arc spots.
  • the present invention is not limited to a hot rolling line in which an edge heater is installed, but can also be applied to a plant or facility having an element whose insulation resistance is to be measured and monitored.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Control Of Conveyors (AREA)
  • General Induction Heating (AREA)

Abstract

La présente invention concerne un dispositif de surveillance d'isolation pour des pièces de transport de produits laminés comprenant : une boîte de borne de mesure manuelle constituant un premier circuit de division de tension qui comprend, en tant qu'une des résistances pour diviser une tension d'alimentation électrique de mesure, une résistance d'isolation de pièces de transport d'isolation disposées avant et après un dispositif de chauffage par induction qui chauffe un produit laminé; et un circuit de mesure automatique constituant un second circuit de division de tension qui comprend la résistance d'isolation en tant qu'une des résistances pour diviser la tension d'alimentation électrique de mesure. L'état d'isolation des pièces de transport d'isolation est ainsi surveillé de manière sûre et précise.
PCT/JP2017/001923 2017-01-20 2017-01-20 Dispositif de surveillance d'isolation pour pièces de transport de produits laminés WO2018134965A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2017/001923 WO2018134965A1 (fr) 2017-01-20 2017-01-20 Dispositif de surveillance d'isolation pour pièces de transport de produits laminés
TW106107964A TWI624670B (zh) 2017-01-20 2017-03-10 軋延材搬送部之絕緣監視裝置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/001923 WO2018134965A1 (fr) 2017-01-20 2017-01-20 Dispositif de surveillance d'isolation pour pièces de transport de produits laminés

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Publication Number Publication Date
WO2018134965A1 true WO2018134965A1 (fr) 2018-07-26

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4846670U (fr) * 1971-10-01 1973-06-19
JPH05281272A (ja) * 1992-03-30 1993-10-29 Sakai Tekkosho:Kk 絶縁抵抗自動測定装置
JP2003048010A (ja) * 2001-08-02 2003-02-18 Nkk Corp 圧延用搬送ローラ絶縁抵抗監視方法及びシステム並びに圧延材の製造方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640058C2 (de) * 1996-09-30 1999-06-10 Heraeus Sensor Nite Gmbh Leiterplatte mit Zugentlastung für Anschluß-Kabel, Verfahren zu deren Herstellung und Verbindung sowie deren Verwendung
JP4739792B2 (ja) * 2005-03-31 2011-08-03 東芝三菱電機産業システム株式会社 誘導加熱装置及び誘導加熱装置のアークスポット抑制方法
US8289031B1 (en) * 2011-05-16 2012-10-16 Rao Dantam K Apparatus for measuring insulation characteristics of coated steel sheet
JP6197890B2 (ja) * 2014-02-14 2017-09-20 東芝三菱電機産業システム株式会社 圧延機の電動機速度制御装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4846670U (fr) * 1971-10-01 1973-06-19
JPH05281272A (ja) * 1992-03-30 1993-10-29 Sakai Tekkosho:Kk 絶縁抵抗自動測定装置
JP2003048010A (ja) * 2001-08-02 2003-02-18 Nkk Corp 圧延用搬送ローラ絶縁抵抗監視方法及びシステム並びに圧延材の製造方法

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TWI624670B (zh) 2018-05-21
TW201827840A (zh) 2018-08-01

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