EP2540407B1 - Système de refroidissement de plaque d'acier et procédé de refroidissement de plaque d'acier - Google Patents

Système de refroidissement de plaque d'acier et procédé de refroidissement de plaque d'acier Download PDF

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Publication number
EP2540407B1
EP2540407B1 EP11809748.4A EP11809748A EP2540407B1 EP 2540407 B1 EP2540407 B1 EP 2540407B1 EP 11809748 A EP11809748 A EP 11809748A EP 2540407 B1 EP2540407 B1 EP 2540407B1
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EP
European Patent Office
Prior art keywords
spray nozzle
steel plate
row group
water
nozzle row
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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EP11809748.4A
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German (de)
English (en)
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EP2540407A4 (fr
EP2540407A1 (fr
Inventor
Ryuji Yamamoto
Yoshihiro Serizawa
Tomoya Oda
Naonori KAWAMURA
Naotaka TAWARA
Hidetaka Agario
Kenichi Ogawa
Kouji SHUTOU
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Nippon Steel Corp
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Nippon Steel and Sumitomo Metal Corp
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Application filed by Nippon Steel and Sumitomo Metal Corp filed Critical Nippon Steel and Sumitomo Metal Corp
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Publication of EP2540407A4 publication Critical patent/EP2540407A4/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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0233—Spray nozzles, Nozzle headers; Spray systems
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • 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
    • B21B45/02—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 lubricating, cooling, or cleaning
    • B21B45/0203—Cooling
    • B21B45/0209—Cooling devices, e.g. using gaseous coolants
    • B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
    • B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates

Definitions

  • the present invention relates to a steel plate cooling system and a steel plate cooling method that cool a steel plate obtained by hot rolling while allowing the steel plate to pass horizontally and restrictively between constraining rolls.
  • a hot steel plate after finish rolling of hot rolling is cooled to a predetermined temperature while being constrained and conveyed between constraining rolls after a finish rolling machine.
  • a cooling system for example, a plurality of spray nozzles that sprays cooling water to the upper and lower surfaces, respectively, of the hot steel plate, is arranged between respective constraining roll pairs, and the hot steel plate is cooled using the cooling water.
  • the aspect of cooling after this finish rolling becomes an important factor that determines the mechanical properties of the steel plate, workability, and weldability, and it is thus important to uniformly cool the hot steel plate to a predetermined temperature.
  • the hot steel plate is cooled using cooling water as described above, on the upper surface side of the hot steel plate, it is difficult to uniformly cool the hot steel plate due to the influence of water flow on a surface that accumulates on the hot steel plate. That is, although the water on the surface on the hot steel plate is discharged in the width direction of the hot steel plate, the water on the surface interferes with a water jet stream of the cooling water sprayed onto the hot steel plate. This makes the cooling water non-uniform in the width direction of the hot steel plate.
  • Patent Document 1 discloses a cooling method of adjusting the collision area of the water jet stream from the spray nozzle or adjusting the spread angle of the water jet stream, causing the water jet stream to sufficiently reach the upper surface of the hot steel plate.
  • cooling capacity can be sufficiently secured and the hot steel plate can be uniformly cooled.
  • the cooling capacity required for the cooling system differs depending on the type, usage, or the like of the steel plate. Accordingly, the cooling system is desired to be able to uniformly cool the hot steel plate as described above, and select a cooling capacity control range across a broad range.
  • the nozzle load pressure of the spray nozzle becomes small. It is thereby difficult to secure the area of a collision portion (hereinafter, referred to as a "spray pattern") of the water jet stream from the spray nozzle to the hot steel plate. For this reason, in the cooling method described in Patent Document 1, the water jet stream from a spray nozzle is influenced by the water on the surface in the case where the cooling water amount is small, and it is difficult to uniformly cool the hot steel plate.
  • Patent Document 2 discloses a cooling system that has spray nozzles that have different amounts of cooling water to be sprayed, and uses the spray nozzles separately according to the required cooling capacity (cooling water amount).
  • a water jet stream with a large amount of cooling water from a spray nozzle affects a water jet stream with a small amount of cooling water in a case where the difference between the amounts of cooling water sprayed from the respective spray nozzles is large when the upper surface of the hot steel plate is cooled, the cooling water becomes non-uniform in the width direction of the hot steel plate. Since non-uniformity of cooling occurs if the spray nozzles with different amounts of cooling water in this way are simultaneously used, the conditions that the cooling system can be applied are limited and the cooling capacity range may not be sufficiently broadened.
  • Patent Document 3 discloses a cooling system including air-water spray nozzles that spray two fluids (air and cooling water) in order to secure a spray pattern.
  • the air-water spray nozzles need an air compressor, air piping, or the like for supplying air, and thus the manufacturing costs of the cooling system become high.
  • the nozzle structure of the air-water spray nozzles is complicated, and is apt to clog, maintenance costs also become high in addition to the manufacturing costs of the cooling system.
  • the pressure control of air and water is complicated, it is difficult to keep the air-water ratio constant, and the cooling capacity changes depending on the air-water ratio. As such, the cooling system has a problem of too many influencing factors, and it is difficult to perform precise cooling capacity control.
  • GB2062520 A discloses a cooling sheet metal with water sprays wherein upper and lower roller conveyer sections reciprocate a steel sheet.
  • WO2008/035510 A1 discloses a method for cooling a steel plate wherein a region of the plate cooled by nozzles is divided.
  • the present invention has been invented in view of the above-described problems, and an object thereof is to provide a steel plate cooling system and a steel plate cooling method that uniformly cool the hot steel plate after hot rolling while broadly controlling cooling capacity when the steel plate is cooled.
  • GB2062520 A discloses a cooling sheet metal with water sprays wherein upper and lower roller conveyer sections reciprocate a steel sheet.
  • WO2008/035510 A1 discloses a method for cooling a steel plate wherein a region of the plate cooled by nozzles is divided.
  • uniform cooling can be performed in a wide cooling capacity range with a smaller number of spray nozzles, a smaller number of nozzle rows, and a smaller number of flow rate regulating valves. Additionally, since the facility configuration is simple, and there is one type of nozzle, reduction in facility construction costs or reduction in maintenance costs can be achieved.
  • FIG 1 is a side view showing a schematic configuration of a portion of a hot-rolling facility having a cooling system 1 related to the present embodiment.
  • a finish rolling machine 2, a hot correcting device 3, and the cooling system 1 are provided in this order in a plate passing direction of a steel plate (hot steel plate) H in the hot-rolling facility.
  • the rolling mill 2 hot-rolls the steel plate H that is discharged from a heating furnace (not shown) and is rolled by a roughing rolling machine (not shown).
  • the hot correcting device 3 corrects the shape of the steel plate H after finish rolling.
  • the cooling system 1 cools the steel plate H after hot correction to a predetermined temperature, for example, 350°C. This allows the steel plate H rolled in the finish rolling machine 2 to be shape-corrected in the hot correcting device 3 and then cooled by the cooling system 1 during conveyance.
  • the hot correcting device 3 may be located on the downstream side (rear surface side) of the cooling system 1. Otherwise, the hot correcting devices 3 may be provided on both sides of the upper side and the lower side with the steel plate H of the cooling system 1 interposed therebetween.
  • the cooling system 1 includes a plurality of constraining roll pairs 10, upper cooling apparatuses 11, and lower cooling apparatuses 12, and a control unit 5.
  • the plurality of constraining roll pairs 10 includes constraining rolls 10a arranged above the steel plate H, and the conveying rolls 10b arranged below the steel plate.
  • the constraining rolls 10a and the conveying rolls 10b are lined up in the horizontal direction in the plate passing direction of the steel plate H, and allow the steel plate H to pass restrictively therebetween.
  • Each constraining roll pair 10 is constituted by two constraining rolls arranged up and down.
  • the steel plate H is conveyed in a state where the steel plate is sandwiched between the upper and lower constraining rolls.
  • the lower constraining roll may be referred to as a conveying roll.
  • constraining rolls 10a and the conveying rolls 10b sandwich the steel plate H.
  • An upper cooling apparatus 11 that cools the upper surface side of the steel plate H and a lower cooling apparatus 12 that cools the lower surface side of the steel plate H are arranged, respectively, between adjacent constraining roll pairs 10 and 10.
  • the upper cooling apparatus 11 and the lower cooling apparatus 12 are arranged so as to be opposed to each other with the steel plate H interposed therebetween. This configuration enables the cooling system 1 to cool the upper and lower surfaces of the steel plate H.
  • the upper cooling apparatus 11 and the lower cooling apparatus 12 have a plurality of spray nozzle rows 21.
  • the spray nozzle rows 21 are arranged in the plate passing direction of the steel plate H, and each of the spray nozzle rows 21 has a plurality of identical spray nozzles 20 lined up in the width direction of the steel plate H.
  • the lower cooling apparatus 12 is provided with a plurality of spray nozzles arranged side by side in the plate passing direction and width direction of the steel plate H, for example, full cone spray nozzles (not shown). Although the full cone nozzles of the lower cooling apparatus 12 are not shown, these nozzles have a slightly larger amount of ejected water than the full cone spray nozzles of the upper cooling apparatus 11 shown in FIG. 2 . Cooling water is sprayed onto the steel plate H from the full cone spray nozzles, and the steel plate H is cooled by a water jet stream of the cooling water from the lower surface side.
  • the upper cooling apparatus 11 has a plurality of spray nozzles that sprays cooling water onto the upper surface of the steel plate H, that is, the full cone spray nozzles 20 in the present embodiment.
  • the full cone spray nozzle 20, as shown in FIG. 4 can spray a conic water jet stream.
  • a plurality of full cone spray nozzles 20, as shown in FIGS. 2 and 3 forms nozzle rows in the width direction of the steel plate H, and a plurality of the nozzle rows is lined up in the plate passing direction.
  • the spray nozzle rows 21 arranged side by side in nine rows are configured.
  • the plurality of spray nozzles 20 is arranged side by side in the width direction of the steel plate H. That is, the plurality of full cone nozzles 20 is alternately arranged in a horizontal cross-sectional view. This configuration allows the cooling water sprayed from the full cone spray nozzles 20 to be sprayed onto the upper surface of the steel plate H.
  • the nine spray nozzle rows 21 a to 21 i are classified into the spray nozzle rows 21 a to 21 c that are respective spray nozzle rows 21 located on the relative upstream side and the spray nozzle rows 21 d to 21i that are respective spray nozzle rows located on the relative downstream side, when viewed in the plate passing direction.
  • the spray nozzle rows are grouped into two nozzle row group 22 and nozzle row groups 23 that are arranged in the plate passing direction of the steel plate H.
  • a nozzle row group arranged on the upstream side (the upstream side of the steel plate H) of the steel plate H is referred to as an upstream spray nozzle row group 22, and a nozzle row group arranged on the downstream side (the downstream side of the steel plate H) of the steel plate H is referred to as a downstream spray nozzle row group 23.
  • the upstream spray nozzle row group 22 is constituted by, for example, three spray nozzle rows 21 a to 21 c
  • the downstream spray nozzle row group 23 is constituted by, for example six spray nozzle rows 21d to 21i.
  • a supply pipe 24 that supplies cooling water to each of the full cone spray nozzles 20 is connected to the full cone spray nozzle 20.
  • the supply pipe 24 extends vertically upward from the full cone spray nozzle 20, and the other end portion of the supply pipe 24 is arranged within a nozzle box 30 that can store cooling water.
  • the inside of the nozzle box 30 is partitioned into two storage chambers 31 and 32.
  • the supply pipes 24 of the full cone spray nozzles 20 of the upstream spray nozzle row group 22 are accommodated in the upstream storage chamber 31 arranged on the upstream side of the steel plate H.
  • the supply pipes 24 of the full cone spray nozzles 20 of the downstream spray nozzle row group 23 is accommodated in the downstream storage chamber 32 arranged on the downstream side of the steel plate H. Cooling water is always stored up to the positions of the other end portions of the supply pipes 24 in each of the storage chambers 31 and 32. Thereby, if cooling water is supplied from a header 40 to be described below to the storage chambers 31 and 32, the cooling water is supplied to the full cone spray nozzles 20 via the supply pipes 24.
  • a supply header 40 that supplies cooling water to the nozzle box 30 (the upstream spray nozzle row group 22 and the downstream spray nozzle row group 23) is arranged above (on the upstream side of) the nozzle box 30.
  • a flow rate regulating valve 41 is provided above (on the upstream side of) the supply header 40. The opening or closing of the flow rate regulating valve 41 allows cooling water to circulate through the inside of the supply header 40, and the flow rate of the cooling water to be supplied to the inside of the supply header 40 to be adjusted (controlled).
  • Piping 42 communicated with the supply header 40 is connected to the upstream storage chamber 31.
  • An on-off control valve (first control valve) 43 is interposed in the piping 42, and the permission or prohibition (on or off, or opening or closing of the valve) of supply of the cooling water from the supply header 40 to the upstream storage chamber 31 (upstream spray nozzle row group 22) is controlled by the on-off control valve 43.
  • piping 44 communicating with the supply header 40 is also connected to the downstream storage chamber 32.
  • An on-off control valve (second control valve) 45 is interposed in the piping 44, and the permission or prohibition (on or off, or opening or closing of the valve) of supply of the cooling water from the supply header 40 to the downstream storage chamber 32 (downstream spray nozzle row group 23) is controlled by the on-off control valve 45.
  • control unit 5 controls the cooling water sprayed toward the steel plate H from the plurality of spray nozzle rows 21.
  • the mutually adjacent intervals a are the same in the plate passing direction of the respective spray nozzle rows 21 that belong to the upstream spray nozzle row group 22. It is preferable that the mutually adjacent intervals b are the same in the plate passing direction of the respective the spray nozzle rows 21 that belong to the downstream spray nozzle row group 23.
  • the adjacent interval c between the spray nozzle rows 21 c arranged closest to the downstream spray nozzle row group 23 side among the respective the spray nozzle rows 21 that belong to the upstream spray nozzle row group 22 and the spray nozzle row 21 d arranged closest to the upstream spray nozzle row group 22 side among the respective spray nozzle rows 21 that belong to the downstream spray nozzle row group 23 is equal to the adjacent interval a and the adjacent interval b. That is, it is preferable that all the adjacent intervals of the respective spray nozzle rows 21 in the plate passing direction are the same.
  • a required cooling water amount is determined from a cooling rate or cooling stop temperature required for the steel plate H.
  • the flow rate regulating valve 41 is controlled by the control unit 5 and the flow rate of the cooling water to be supplied to the supply header 40 is regulated so that the cooling water of the cooling water amount is supplied.
  • both the on-off control valves 43 and 45 are opened by the control unit 5.
  • cooling water is supplied to the upstream storage chamber 31 from the supply header 40, for example by opening the on-off control valve 43.
  • the cooling water within the upstream storage chamber 31 is sprayed onto the steel plate H via the supply pipes 24 of the upstream spray nozzle row group 22, and the full cone spray nozzles 20.
  • cooling water is sprayed onto the steel plate H via the downstream storage chamber 32, the supply pipes 24 of the downstream spray nozzle row group 23, and the full cone spray nozzles 20 from the supply header 40, for example by opening the on-off control valve 45.
  • spraying of cooling water is controlled in every nozzle row group 22 or 23.
  • the spray angle ⁇ of a water jet stream from the full cone spray nozzle 20 shown in FIG. 4 depends on the nozzle load pressure of the full cone spray nozzle 20.
  • the results that the inventors have investigated regarding this point are shown in FIG 5 .
  • the horizontal axis of FIG 5 represents the nozzle load pressure, and the vertical axis represents the change rate of the spray angle. Referring to FIG. 5 , it can be seen that the change rate of the spray angle of the full cone spray nozzle 20 decreases abruptly when the nozzle load pressure is equal to or lower than about 0.04 MPa (dotted line in FIG. 5 ).
  • the nozzle load pressure of the full cone spray nozzle 20 is required to be equal to or higher than 0.04 MPa.
  • the nozzle load pressure is set to be equal to or higher than 0.04 MPa, this is just an example.
  • the inventors have investigated the cooling water amount of the full cone spray nozzle 20 that is required to secure a nozzle load pressure of 0.04 MPa or higher, that is, to secure the spray pattern.
  • the results are shown in FIG. 6 .
  • the horizontal axis of FIG. 6 represents the nozzle load pressure, and the vertical axis represents the cooling water amount of the full cone spray nozzle 20.
  • the range of the cooling water amount that secures the spray pattern it can be seen that the range of the ratio of the maximum water amount and minimum water amount of the full cone spray nozzle 20 is within a range of about 3:1.
  • FIG. 7 shows the relationship between the nozzle load pressure of the full cone spray nozzle 20, and the water amount density of the cooling water supplied from the upper cooling apparatus 11.
  • the water amount density represents the cooling water amount per unit area of the cooling water sprayed onto the steel plate H between the constraining roll pair 10a and 10b arranged with the steel plate H interposed therebetween. Accordingly, although the water amount density or the cooling water amount may be described hereinbelow, both have the same meaning.
  • the cooling capacity required for the cooling system 1 that is, the required cooling water amount, (water amount density) differs depending on the type, usage, or the like of the steel plate H.
  • the required cooling water amount is larger than the maximum water amount of the upstream spray nozzle row group 22 (the range of an upper solid line in the graph of FIG. 7 )
  • cooling water is sprayed onto the upper surface of the steel plate H from both the upstream spray nozzle row group 22 and the downstream spray nozzle row group 23, for example, as shown in FIG. 8 .
  • the cooling water amount is larger than the maximum water amount of the upstream spray nozzle row group 22, the water on the surface 50 that accumulates on the steel plate H spreads to the entire upper surface of the steel plate H between the constraining roll pairs 10 and 10.
  • the steel plate H is uniformly cooled at least in the width direction of the steel plate H. Accordingly, in order to avoid the influence of the water on the surface 50, it is necessary to secure the spray pattern of each full cone spray nozzle 20.
  • the nozzle load pressure of the full cone spray nozzle 20 is required to be equal to or higher than 0.04 MPa.
  • this nozzle load pressure can be secured and the steel plate H can be suitably cooled.
  • the nozzle load pressure of the full cone spray nozzle 20 also decreases.
  • the required cooling water amount density is equal to or lower than about 0.55 m 3 /m 2 /min in FIG. 7 , that is, lower than the maximum water amount of the upstream spray nozzle row group 22
  • the nozzle load pressure of 0.04 MPa cannot be secured in each of the full cone spray nozzles 20.
  • the required water amount density is a water amount density that is equal to or lower than about 0.55 m 3 /m 2 /min (the range of the lower solid line in the graph of FIG. 7 ), that is, lower than the maximum water amount of the upstream spray nozzle row group 22, as shown in FIG 9 , the water on the surface 50 on the steel plate H becomes a small amount, and the water on the surface 50 flows in the plate passing direction of the steel plate H, that is, toward the downstream side of the steel plate H, with the movement of the steel plate H.
  • the spraying of the cooling water from the downstream spray nozzle row group 23 is stopped as described above.
  • the upper solid line shifts to the lower solid line, and the nozzle load pressure of the full cone spray nozzle 20 in the upstream spray nozzle row group 22 rises abruptly. Accordingly, the spray pattern of the full cone spray nozzle 20 can be secured, and the steel plate H can be suitably cooled.
  • the ratio of the number (nine rows) of rows of all the spray nozzle rows 21a to 21i and the number (three rows) of rows of the spray nozzle rows 21 a to 21c of the upstream spray nozzle row group 22 be the ratio of the maximum water amount and minimum water amount of the full cone spray nozzle 20, that is, the above-described 3:1.
  • the nozzle load pressure of each full cone spray nozzle 20 becomes small compared to a case where the number of rows of the upstream spray nozzle row group 22 is three. Then, in a case where the required cooling water amount has further decreased, and the number of rows of the upstream spray nozzle row group 22 is three, the spray pattern can be secured. However, in a case where the number of rows of the upstream spray nozzle row group 22 is equal to or higher than four, a case where the spray pattern cannot be secured occurs.
  • the range of the water amount density in which the spray pattern can be secured and the steel plate H can be suitably cooled in a case where the number of rows of the upstream spray nozzle row group 22 is equal to or higher than four becomes narrow compared to the range of the water amount density in a case where the number of rows of the upstream spray nozzle row group 22 is three.
  • the ratio of the maximum water amount density and minimum water amount density, that is, the cooling capacity control range, of controllable cooling water becomes a wide range of 9:1.
  • the ratio of the number of rows of all the spray nozzle rows 21a to 21i and the number of rows of the spray nozzle rows 21a to 21c of the upstream spray nozzle row group 22 be an integer ratio that is the same as or approaches the ratio of the maximum water amount and minimum water amount of the full cone spray nozzle 20.
  • the ratio of the maximum water amount and minimum water amount of the full cone spray nozzle 20 is 3:1.
  • the ratio of the number of rows of all the spray nozzle rows 21 a to 21i and the number of rows of the spray nozzle rows 21 a to 21 c of the upstream spray nozzle row group 22 is set to 3:1.
  • the ratio of the numbers of the spray nozzle rows is not limited to this. If the ratio of the numbers of the spray nozzle rows is the ratio of the maximum water amount and minimum water amount of a spray nozzle as described above, the ratio of the numbers of the spray nozzle rows can be set to various values.
  • the ratio of the number (seven rows) of rows of all the spray nozzle rows and the number (three rows) of rows of the spray nozzle rows of the upstream spray nozzle row group is also set to 7:3.
  • the ratio of the number of rows of all the spray nozzle rows 21a to 21i and the number of rows of the spray nozzle rows 21 a to 21c of the upstream spray nozzle row group 22 may be set to an integer ratio approaching the ratio of the maximum water amount and minimum water amount of the full cone spray nozzle 20.
  • the ratio of the maximum water amount in a case where the minimum water amount is set to 1 is set to an integer by rounding off to the closest integer.
  • the ratio of the maximum water amount and minimum water amount of the full cone spray nozzle is 1:3.1
  • the ratio can be 1:3 by rounding off 3.1 to the closest integer.
  • the integer ratio of the maximum water amount and minimum water amount of the full cone spray nozzle 20 obtained in this way may be set to an integer ratio to approach the above.
  • an uncontrollable water amount density range be between the maximum water amount density and the minimum water amount density. Therefore, it is preferable to approximate the ratio of the number of rows of all the spray nozzle rows and the number of rows of the spray nozzle rows of the upstream spray nozzle row group 22 so as to become smaller than the ratio of the maximum water amount and minimum water amount of a spray nozzle.
  • the ratio of the maximum water amount and the minimum water amount is about four, and may be equal to or lower than four. If needed, the upper limit may be 3.5,3, or 2.5.
  • the water on the surface 50 may flow to and accumulate on the downstream side of the steel plate H depending on a required cooling water amount.
  • the upstream spray nozzle row group 22 be arranged so that the cooling water sprayed from the upstream spray nozzle row group 22 does not interfere with the water on the surface 50.
  • the upstream spray nozzle row group 22 be arranged so that cooling water is sprayed from the upstream spray nozzle row group 22 toward a position of the upstream side in the plate passing direction not overlapped with the region of the water on the surface 50 that accumulates on the steel plate H.
  • the inventors keenly studied the range over which the water on the surface 50 is present on the steel plate H in a case where cooling water is sprayed only from the upstream spray nozzle row group 22. Specifically, first, the cooling water of the water amount density W of the maximum water amount of the upstream spray nozzle row group 22 was sprayed from the upper cooling apparatus H to the steel plate H in a state where the steel plate H is made stationary, and the height hc of the water on the surface at the center in the plate width direction was derived through experiments.
  • X 0 Horizontal range of water on the surface 50 (m)
  • hc Height (m) of water on the surface 50 at center in plate width direction in a case where steel plate H is in a stationary state
  • S Distance m between centers of constraining roll pairs 10 and 10
  • Ls Plate passing speed (m/min) of steel plate H
  • W Water amount density (m 3 /m 2 /min) of cooling water sprayed from upper cooling apparatus 11
  • B Width (m) of steel plate H.
  • "0.04" is a constant having a dimension of (m (-1/3) /min (2/3) ).
  • the range X 0 where the water on the surface 50 is present on the steel plate H is calculated by the above Formula (1).
  • the position of an upstream end portion of the range X 0 where the water on the surface 50, as shown in FIG 9 is almost the same as the position of an upstream end portion of the downstream spray nozzle row group 23.
  • the upstream spray nozzle row group 22 is arranged at a position where a water jet stream of the cooling water sprayed from the downstream spray nozzle row 21 c does not interfere with the water on the surface 50, that is, at a position where a downstream end portion of the water jet stream is apart from the center of downstream constraining roll pair 10 by the range X 0 or higher.
  • the upstream spray nozzle row group 22 sprays cooling water to a place with almost no water on the surface 50, the region of the steel plate H that the sprayed cooling water hits is uniformly cooled. That is, since the direction in which the water on the surface 50 flows is the same as the plate passing direction of the steel plate H, the water on the surface 50 is seldom stirred. By suppressing stirring of the water on the surface 50 in this way, the steel plate H can be uniformly cooled.
  • the spraying of the cooling water onto the upper surface of the steel plate H is controlled in each nozzle row group 22 or 23.
  • the required cooling capacity is high, that is, in a case where the required cooling water amount is smaller than the maximum water amount of the upstream spray nozzle row group 22 (the range of the upper solid line in the graph of FIG. 7 )
  • the cooling water of which the flow rate has been controlled by the flow rate regulating valve 41 is first supplied to the supply header 40.
  • both the on-off control valves 43 and 45 are opened, and cooling water is sprayed onto the upper surface of the steel plate H from all the nozzle row groups 22 and 23.
  • the nozzle load pressure of the full cone spray nozzle 20 is high, even if the water on the surface 50 accumulates on the steel plate H, the spray pattern of each full cone spray nozzle 20 can be secured and the water on the surface 50 is forcibly stirred as a whole.
  • the steel plate H can be uniformly cooled. Accordingly, the steel plate H can be uniformly cooled to a predetermined temperature.
  • the flow rate of cooling water is first controlled by the flow rate regulating valve 41, and this cooling water is supplied to the supply header 40. Then, only the on-off control valve 43 is opened, for example cooling water is sprayed onto the upper surface of the steel plate H only from the upstream spray nozzle row group 22 of the steel plate H, and the spraying of the cooling water from the downstream spray nozzle row group 23 of the steel plate is stopped.
  • the amount of cooling water sprayed onto the steel plate H can be set to a predetermined water amount. Additionally, the water on the surface 50 on the steel plate H becomes a small amount, and the water on the surface 50 flows in the plate passing direction of the steel plate H, that is, to the downstream side of the steel plate H, with the movement of the steel plate H. For this reason, the cooling water sprayed to the upstream side of the steel plate H can cool the steel plate H uniformly without being influenced by the water on the surface 50. Accordingly, the steel plate H can be uniformly cooled to a predetermined temperature. According to the present embodiment as described above, the steel plate H can be uniformly cooled to a predetermined temperature while controlling the cooling capacity over a broad range.
  • the water on the surface 50 flows to the upstream side from a spraying region. Since the direction in which the water on the surface 50 flows and the plate passing direction of the steel plate H are reverse, an irregular flow occurs in the water on the surface 50, and cooling of the steel plate H becomes uneven in the width direction or the longitudinal direction on the upstream side of the spraying region. Accordingly, it is not preferable to spray cooling water only from the downstream spray nozzle row group 23.
  • cooling capacities of all the full cone spray nozzles 20 are the same in the upper cooling apparatus 11.
  • cooling water becomes uneven with respect to the steel plate H.
  • cooling water does not become uneven with respect to the steel plate H because the cooling water sprayed from the full cone spray nozzles 20 can be kept from affecting each other.
  • cooling capacity control range can be selected over a broad range.
  • the cooling capacities of all the full cone spray nozzles 20 are the same, there is also an effect that the control of the full cone spray nozzles 20 when cooling the steel plate H becomes easy.
  • the ratio of the number of rows of all the spray nozzle rows 21 a to 21 i and the number of rows of the spray nozzle rows 21 a to 21c of the upstream spray nozzle row group 22 is set to the ratio of the maximum water amount and minimum water amount of each full cone spray nozzle 20. For this reason, in a case where the required cooling capacity has decreased, as described above, the spraying of the cooling water from the downstream spray nozzle row group 23 can be stopped at a suitable timing. Accordingly, the cooling capacity control range can be maximized, while securing the required cooling capacity.
  • the upstream spray nozzle row group 22 is arranged at a position where a water jet stream of the cooling water sprayed from the upstream spray nozzle row group 22 does not interfere with the water on the surface 50, the cooling water sprayed from the spray nozzle rows 21 c of the downstream is not influenced by the water on the surface 50.
  • the spray pattern of each full cone spray nozzle 20 can be secured as described above. Accordingly, even in a case where the required cooling capacity is low, the steel plate H can be suitably cooled.
  • the steel plate H can be uniformly cooled in the present embodiment as described above, the inventors have verified this effect. Specifically, in a case where the required cooling water amount is smaller than the maximum water amount of the upstream spray nozzle row group 22, as shown in FIG 9 , cooling water was sprayed onto the steel plate H only from the upstream spray nozzle row group 22.
  • FIG. 11 The horizontal axis of FIG. 11 represents the positions of the steel plate H in the width direction, and the vertical axis represents the cooling rates of the steel plate H in the respective positions in the width direction. Referring to FIG. 11 , it is confirmed that the cooling rates become almost uniform in the width direction of the steel plate H, and the steel plate H can be uniformly cooled.
  • FIGS. 12 to 15 show a second embodiment, and show a steel plate cooling system.
  • steel materials are thick plates, and members and apparatuses above a steel plate will be described. In the following description, the description of the same members as those of the first embodiment is omitted.
  • the second embodiment is different from the first embodiment in that water supply headers are provided in the upstream spray nozzle row group and downstream spray nozzle row group, respectively, and that the flow rate regulating valve is provided in each water supply header.
  • a steel plate cooling system 100 includes an upper cooling apparatus 111 and a lower cooling apparatus 112.
  • the upper cooling apparatus 111 includes a small-flow-rate cooling unit (upstream spray nozzle row group) 110 and a large-flow-rate nozzle cooling unit (downstream spray nozzle row group) 130.
  • the small-flow-rate cooling unit 110 and the large-flow-rate nozzle cooling unit 130 are arranged above the steel plate H.
  • the small-flow-rate cooling unit 110 includes a small-flow-rate water supply header (first water supply header) 117.
  • the small-flow-rate water supply header 117 supplies cooling water to the small-flow-rate cooling unit 110.
  • the large-flow-rate nozzle cooling unit 130 includes a large-flow-rate water supply header (second supply header) 137.
  • the large-flow-rate water supply header 137 supplies cooling water to the large-flow-rate nozzle cooling unit 130.
  • the steel plate cooling system 100 includes a flow rate regulating valve (first flow rate regulating valve) 114 that adjusts the flow rate of the cooling water to be supplied to the small-flow-rate water supply header 117, and a flow rate regulating valve (second flow rate regulating valve) 134 that adjusts the flow rate of the cooling water to be supplied to the large-flow-rate water supply header 137.
  • first flow rate regulating valve first flow rate regulating valve
  • second flow rate regulating valve second flow rate regulating valve
  • flow rate regulating valves 114 and 134 are connected to a flow rate adjusting unit (control unit) 149.
  • a channel switching three-way valve 115 or 135 that is one of on-off control valves is connected to the flow rate adjusting unit 149.
  • the flow rate adjusting unit 149 controls the opening or closing of the flow rate regulating valves 114 and 134 and the channel switching three-way valves 115 and 135, and controls the cooling water made to be sprayed toward the steel plate H from a plurality of cooling water spray nozzles 126.
  • the small-flow-rate water supply header 117 is connected to a cooling water tank (not shown) via a small-flow-rate cooling water supply pipe 112.
  • the flow rate regulating valve 114 and the channel switching three-way valve 115 are attached to the small-flow-rate cooling water supply pipe 112.
  • One outlet of the channel switching three-way valve 115 is connected to the small-flow-rate water supply header 117 via the small-flow-rate cooling water supply pipe 112.
  • switching of this direction is referred to as opening.
  • the outer outlet of the channel switching three-way valve 115 is connected to the cooling water tank (not shown) via a return pipe (not shown).
  • switching of this direction is referred to as closing.
  • the large-flow-rate nozzle cooling unit 130 also includes the large-flow-rate cooling water supply pipe 132, the flow rate regulating valve 134, and the channel switching three-way valve 135.
  • the flow rate regulating valve 114 of the small-flow-rate cooling unit 110 and the flow rate regulating valve 134 of the large-flow-rate nozzle cooling unit 130 preferably have degrees of opening that become a water supply amount density proportional to the ratio of the number of cooling water spray nozzles of the large-flow-rate nozzle cooling unit 130 to the number of cooling water spray nozzles of the small-flow-rate cooling unit 110.
  • the amount of cooling water from the cooling water spray nozzles 126 of the small-flow-rate cooling unit 110 and the amount of cooling water from cooling water spray nozzles 146 of the large-flow-rate nozzle cooling unit 130 are uniformly maintained, so that the steel plate H can be uniformly cooled.
  • the small-flow-rate cooling unit 110 includes a small-flow-rate nozzle header 122
  • the large-flow-rate nozzle cooling unit 130 includes a large-flow-rate cooling water nozzle header 142.
  • small-flow-rate nozzle water supply pipes 119 are connected to the small-flow-rate nozzle header 122
  • large-flow-rate nozzle water supply pipes 139 are connected to the large-flow-rate nozzle header 142.
  • the small-flow-rate cooling water spray nozzles 126 are attached to the small-flow-rate nozzle header 122
  • the large-flow-rate cooling water spray nozzles 146 are attached to the large-flow-rate nozzle header 142.
  • the small-flow-rate cooling water spray nozzles 126 and the large-flow-rate cooling water spray nozzles 146 are the same. Additionally, the intervals of the small-flow-rate cooling water spray nozzles 126 and the large-flow-rate cooling water spray nozzles 146 in the plate passing direction are equal. Moreover, the intervals of the cooling water spray nozzles 126 and 146 of the adjacent small-flow-rate cooling unit 110 and large-flow-rate nozzle cooling unit 130 in the plate passing direction are also equal to the intervals of the other cooling water spray nozzles 126 and 146 in the plate passing direction. Thereby, deviation decreases in the accumulated amount of the water on the surface, and the steel plate is uniformly cooled.
  • the small-flow-rate cooling water spray nozzles 126 penetrates through a bottom plate 124 of the small-flow-rate nozzle header 122, cooling water inlets 127 of upper ends thereof are located near a top plate 123, and jetting ports 28 of lower ends thereof protrude downward from the bottom plate 124.
  • the large-flow-rate nozzle header 142 has the same structure as the small-flow-rate nozzle header 122, and the large-flow-rate cooling water spray nozzles 146 have the same structure as the small-flow-rate cooling water spray nozzles 126.
  • the interval g between the top plate 123 of the small-flow-rate nozzle header 122 and the cooling water inlets 127 of the small-flow-rate cooling water spray nozzles 126 and the interval g between the top plate 143 of the large-flow-rate nozzle header 142 and cooling water inlets 147 of the large-flow-rate cooling water spray nozzles 146 be set to 3 to 8 mm. If the interval g is less than 3 mm, the pressures applied to the cooling water inlets do not become equal, and water is apt to come out in the cooling water spray nozzles nearest to the nozzle water supply pipes 119 and 139. Thereby, the difference between the amounts of water sprayed from the respective spray nozzles 126 and 146 may occur.
  • interval g exceeds 8 mm, excessive time is taken until the small-flow-rate nozzle header 122 and the large-flow-rate nozzle header 142 are filled with water after water filling begins. Moreover, if the interval g exceeds 8 mm, when the water filling from the cooling water spray nozzles 126 and 146 is stopped, water will drip from the cooling water spray nozzles 126 and 146 until all the water accumulated between the cooling water inlets 127 and 147 and the top plates 123 and 142 of the headers is exhausted.
  • a small-flow-rate cooling unit 150 and a large-flow-rate nozzle cooling unit 170 below the steel plate H that are the same as the small-flow-rate cooling unit 110 and the large-flow-rate nozzle cooling unit 130 are arranged above the steel plate H.
  • the intervals g are respectively the interval g between a bottom plate 164 of a small-flow-rate nozzle header 162 and cooling water inlets 167 of small-flow-rate cooling water spray nozzles 166 and the interval g between a bottom plate 184 of a large-flow-rate nozzle header 182 and cooling water inlets 187 of large-flow-rate cooling water spray nozzles 186.
  • FIG. 14 schematically shows the arrangement of the small-flow-rate cooling water spray nozzles 126 (166) and the large-flow-rate cooling water spray nozzles 146 (186).
  • a number of the small-flow-rate cooling water spray nozzles 126 (166) and a number of the large-flow-rate cooling water spray nozzles 146 (186) are arranged at regular intervals, respectively, in the steel plate width direction and the steel plate conveying direction.
  • the small-flow-rate cooling water spray nozzles 126 (166) and the large-flow-rate cooling water spray nozzles 146 (186) have the same nozzle diameter, and the number of the small-flow-rate cooling water spray nozzles is smaller than the number of the large-flow-rate cooling water spray nozzles.
  • FIG. 15 shows the relationship between the water supply amount density (m 3 /m 2 /min) and the nozzle water supply pressure (MPa).
  • a spray pattern securing limit pressure is a nozzle water supply pressure (for example, 30 kPa) of whether or not a predetermined spray pattern determined according to the nozzle can be secured.
  • a nozzle water supply pressure for example, 30 kPa
  • the nozzle water supply pressure it is necessary to set the nozzle water supply pressure to be equal to or higher than the spray pattern securing limit pressure. For this reason, in the cooling of the steel plate (steel material) H, a water supply amount density for obtaining a required cooling rate (determined depending on the constituents of the steel material and the material quality to be secured) is determined.
  • cooling water is supplied to both the small-flow-rate nozzle header 122 and the large-flow-rate nozzle header 142 if the determined water supply amount density is within a range of b to c as shown in FIG 15 , and cooling water is supplied only to the small-flow-rate nozzle header 122 if the water supply amount density is within a range of a to b.
  • the spraying water amount and fuel spraying pressure from the respective nozzles via the small-flow-rate nozzle header 122 and the large-flow-rate nozzle header 142 are adjusted by the flow rate regulating valves 114 and 134 so as to become constant.
  • the steel plate cooling system 100 includes the flow rate adjusting unit 149 on the steel plate upper surface side.
  • the flow rate adjusting unit 149 controls the cooling water to be sprayed toward the steel plate H from the small-flow-rate cooling water spray nozzles 126 and the large-flow-rate cooling water spray nozzles 146.
  • a cooling rate is determined by, for example, a host computer from the constituents of a target steel plate, mechanical properties (material quality), or the like, and a zone water supply amount density is obtained from this cooling rate and the plate thickness of the target steel plate.
  • a nozzle header (both the large-flow-rate water supply header 137 and the small-flow-rate water supply header 117, or only the small-flow-rate water supply header 117) to be used is determined from the zone water supply amount density and FIG 15 .
  • the zone water supply amount density obtained in this way, and the information on a nozzle header to supply water are input to the flow rate adjusting unit 149.
  • a water supply amount density ratio is further input to the flow rate adjusting unit 149.
  • the flow rate adjusting unit 149 input the valve opening signals of the flow rate regulating valves 114 and 134, and the signals for opening the channel switching three-way valves 115 and 135, on the basis of the input zone water supply amount density, nozzle header information, and water supply amount density ratio.
  • the flow rate adjusting unit 149 closes the channel switching three-way valve 115, and opens the channel switching three-way valve 135, and outputs the valve opening signal of the flow rate regulating valve 134. Additionally, in a case where the nozzle header information relates to using only the small-flow-rate water supply header 117, the flow rate adjusting unit 149 closes the channel switching three-way valve 135, and opens the channel switching three-way valve 115, and outputs the valve opening signal of the flow rate regulating valve 114. Additionally, a flow rate adjusting unit 189 on the lower surface side of the steel plate H (control unit) is also the same.
  • the cooling units 110 and 130 upper cooling apparatus 111) above the steel plate
  • the cooling units 150 and 170 lower cooling apparatus 112 below the steel plate H
  • a cooling water supply pipe 152, a water supply header 157, a nozzle water supply pipe 159, the nozzle header 162, the cooling water spray nozzles 166, and a cooling water supply pipe 172, a water supply header 177, a nozzle water supply pipe 179, the nozzle header 182, and the cooling water spray nozzles 186 have the same structure as the upper cooling apparatus 111 above the steel plate H.
  • the flow rate regulating valves 154 and 174, the channel switching three-way valves 155 and 175, and the flow rate adjusting unit 189 also have the same structure as the upper cooling apparatus 111 above the steel plate H.
  • the zone water supply amount density (For example, 1.5 m 3 /m 2 /min) of a cooling zone where the steel plate cooling system 100 is arranged information on a nozzle header to supply water (for example, the large-flow-rate water supply header 137 and the small-flow-rate water supply header 117), and the water supply amount density ratio (for example, 2.0) of the large-flow-rate nozzle cooling unit 130 to the small-flow-rate cooling unit 110 are input to the flow rate adjusting unit 189 above the steel plate H top from the host computer.
  • the flow rate adjusting unit 149 determines the respective water supply amount densities (For example, small-flow-rate cooling unit: 0.5 m 3 /m 2 /min, and large-flow-rate nozzle cooling unit: 1.0 m 3 /m 2 /min) of the small-flow-rate cooling unit 110 and the large-flow-rate nozzle cooling unit 130, determines the opening degrees of the flow rate regulating valves 114 and 134 on the basis of the determined respective water supply amount densities, and outputs to the flow rate regulating valves 114 and 134 the opening degree information from which the above water supply amount densities are obtained.
  • the flow rate regulating valves 114 and 134 operate if this opening degree information is input, and have opening degrees corresponding to the information.
  • the cooling water of the small-flow-rate cooling water supply pipe 112 passes sequentially through the small-flow-rate water supply header 117 and the small flow rate nozzle water supply pipes 119, and flows into the small flow rate unit 122.
  • the cooling water of the large-flow-rate cooling water supply pipe 132 passes sequentially through the large-flow-rate water supply header 137 and the large-flow-rate nozzle water supply pipes 139, and flows into the large flow rate unit 142.
  • the small flow rate unit 122 and the large flow rate unit 142 are filled with cooling water in a short time, and the cooling water is sprayed almost simultaneously from the small-flow-rate-side cooling water spray nozzles 126 of the small flow rate unit 122, and the large-flow-rate-side cooling water spray nozzles 146 of the large flow rate unit 142.
  • the water supply amount density ratio to be output from the above host computer to the flow rate adjusting units 149 and 189 is calculated from the cooling zone water supply amount density.
  • the water supply amount density ratio be a water supply amount density ratio proportional to the number of nozzles of the large-flow-rate nozzle header 142 to the number of nozzles of the small-flow-rate nozzle header 122 or a value close thereto, in either case, it is necessary to set the pressures within both the headers 122 and 142 to a value equal to or higher than the spray pattern securing limit pressure.
  • the cooling units 150 and 170 below the steel plate H are similarly adjusted.
  • the opening degree of the flow rate regulating valve 114 of the unit 110 that is a water supply target is determined, and actuating signals are output from the host computer to the flow rate adjusting units 149 and 189, similar to above, with respect to the flow rate regulating valve 114 and the channel switching three-way valve 115.
  • the present invention is not limited to the above first and the second embodiments. That is,
  • the present invention is useful when a steel plate obtained by hot rolling is cooled while allowing the steel plate to pass horizontally and restrictively between constraining rolls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Strip Materials And Filament Materials (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (6)

  1. Système de refroidissement de plaque d'acier (1) comprenant :
    une pluralité de paires de rouleaux de contrainte (10) qui permettent à une plaque d'acier de passer entre eux de manière restrictive ; et
    un appareil de refroidissement supérieur (11) et un appareil de refroidissement inférieur (12) qui sont agencés entre les paires de rouleaux de contrainte (10) de sorte à être opposés l'un à l'autre, la plaque d'acier étant intercalée entre eux, et possèdent une pluralité de rangées de buses de pulvérisation,
    dans lequel la pluralité de rangées de buses de pulvérisation sont formées dans une direction de passage de plaque de la plaque d'acier, et chacune des rangées de buses de pulvérisation (21) possède une pluralité de buses de pulvérisation identiques (20) alignées dans une direction de la largeur de la plaque d'acier, et
    dans lequel lorsqu'elles sont vues dans la direction de passage de plaque, les rangées de buses de pulvérisation (21) sont chacune classées en un groupe de rangées de buses de pulvérisation en amont (22) situé sur un côté en amont relatif et en un groupe de rangées de buses de pulvérisation en aval (23) situé sur un côté en aval relatif,
    le système de refroidissement de plaque d'acier comprenant en outre :
    un collecteur d'alimentation en eau (40) qui fournit une eau de refroidissement au groupe de rangées de buses de pulvérisation en amont (22) et au groupe de rangées de buses de pulvérisation en aval (23) ;
    une vanne de régulation de débit (41) qui régule le débit de l'eau devant être fournie au collecteur d'alimentation en eau (40) ;
    une première vanne de commande (43) qui commande une autorisation ou interdiction de fourniture de l'eau de refroidissement devant être fournie par le collecteur d'alimentation en eau au groupe de rangées de buses de pulvérisation en amont (22) ; et
    une seconde vanne de commande (45) qui commande une autorisation ou interdiction de fourniture de l'eau de refroidissement devant être fournie par le collecteur d'alimentation en eau au groupe de rangées de buses de pulvérisation en aval (23),
    dans lequel un nombre de buses de pulvérisation (20) qui appartiennent au groupe de rangées de buses de pulvérisation en amont (22) est plus petit qu'un nombre de buses de pulvérisation (20) qui appartiennent au groupe de rangées de buses de pulvérisation en aval (23), et
    comprenant en outre une unité de commande (5) qui commande la pulvérisation d'une eau de refroidissement vers la plaque d'acier à partir de la pluralité de rangées de buses de pulvérisation (21),
    dans lequel l'unité de commande (5) commande la pulvérisation de l'eau de refroidissement de sorte que l'eau de refroidissement est amenée à être pulvérisée à la fois depuis le groupe de rangées de buses de pulvérisation en amont (22) et le groupe de rangées de buses de pulvérisation en aval (23) dans un cas où une quantité totale d'eau devant être pulvérisée vers la plaque d'acier est supérieure ou égale à une quantité de pulvérisation maximale du groupe de rangées de buses de pulvérisation en amont (22), et l'eau de refroidissement est amenée à être pulvérisée uniquement à partir du groupe de rangées de buses de pulvérisation en amont (22) dans un cas où la quantité totale de l'eau est inférieure à la quantité de pulvérisation maximale du groupe de rangées de buses de pulvérisation en amont (22).
  2. Système de refroidissement de plaque d'acier comprenant :
    une pluralité de paires de rouleaux de contrainte (10) qui permettent à une plaque d'acier de passer entre eux de manière restrictive ; et
    une pluralité d'appareils de refroidissement supérieurs (111) et une pluralité d'appareils de refroidissement inférieurs (112) qui sont agencés entre les paires de rouleaux de contrainte (10) de sorte à être opposés les uns aux autres, la plaque d'acier étant intercalée entre eux, et possèdent une pluralité de rangées de buses de pulvérisation entre chaque paire de rouleaux de contrainte (10),
    dans lequel la pluralité de rangées de buses de pulvérisation sont formées dans une direction de passage de plaque de la plaque d'acier, et chacune des rangées de buses de pulvérisation possède une pluralité de buses de pulvérisation identiques alignées dans une direction de la largeur de la plaque d'acier ;
    dans lequel lorsqu'elles sont vues dans la direction de passage de plaque, les rangées de buses de pulvérisation sont classées chacune en un groupe de rangées de buses de pulvérisation en amont (22) situé sur un côté en amont relatif et un groupe de rangées de buses de pulvérisation en aval (23) situé sur un côté en aval relatif, et
    dans lequel un nombre des buses de pulvérisation qui appartiennent au groupe de rangées de buses de pulvérisation en amont (22) est plus petit qu'un nombre des buses de pulvérisation qui appartiennent au groupe de rangées de buses de pulvérisation en aval (23),
    le système de refroidissement de plaque d'acier comprenant en outre :
    un premier collecteur d'alimentation en eau (117) qui fournit une eau de refroidissement au groupe de rangées de buses de pulvérisation en amont ;
    un second collecteur d'alimentation en eau (137) qui fournit une eau de refroidissement au groupe de rangées de buses de pulvérisation en aval ;
    une première vanne de régulation de débit (114) qui régule un débit de l'eau de refroidissement devant être fournie au premier collecteur d'alimentation en eau ;
    une seconde vanne de régulation de débit (134) qui régule un débit de l'eau de refroidissement devant être fournie au second collecteur d'alimentation en eau ; et
    une unité de commande qui commande la pulvérisation de l'eau de refroidissement vers la plaque d'acier à partir de la pluralité de rangées de buses de pulvérisation,
    dans lequel l'unité de commande commande la pulvérisation de l'eau de refroidissement de sorte que l'eau de refroidissement est amenée à être pulvérisée à la fois depuis le groupe de rangées de buses de pulvérisation en amont (122) et le groupe de rangées de buses de pulvérisation en aval (142) dans un cas où une quantité totale d'eau devant être pulvérisée vers la plaque d'acier est supérieure ou égale à une quantité de pulvérisation maximale du groupe de rangées de buses de pulvérisation en amont, et l'eau de refroidissement est amenée à être pulvérisée uniquement à partir du groupe de rangées de buses de pulvérisation en amont dans un cas où la quantité totale de l'eau est inférieure à la quantité de pulvérisation maximale du groupe de rangées de buses de pulvérisation en amont.
  3. Système de refroidissement de plaque d'acier selon la revendication 1 ou 2,
    dans lequel les intervalles mutuellement adjacents, dans la direction de passage de plaque, des rangées de buses de pulvérisation respectives qui appartiennent au groupe de rangées de buses de pulvérisation en amont (22) sont identiques, et
    dans lequel les intervalles mutuellement adjacents, dans la direction de passage de plaque, des rangées de buses de pulvérisation respectives qui appartiennent au groupe de rangées de buses de pulvérisation en aval (23) sont identiques.
  4. Système de refroidissement de plaque d'acier selon l'une quelconque des revendications 1 à 3,
    dans lequel tous les intervalles adjacents des rangées de buses de pulvérisation respectives dans la direction de passage de plaque sont identiques.
  5. Système de refroidissement de plaque d'acier selon l'une quelconque des revendications 1 à 3,
    dans lequel le groupe de rangées de buses de pulvérisation (22) est agencé de sorte qu'une eau de refroidissement est pulvérisée à partir du groupe de rangées de buses de pulvérisation en amont (22) vers une position plus proche du côté en amont dans la direction de passage de plaque qu'une région d'un écoulement d'eau sur une surface qui s'accumule sur la plaque d'acier lorsqu'une quantité de pulvérisation maximale est amenée à être pulvérisée à partir du groupe de rangées de buses de pulvérisation en amont.
  6. Procédé de refroidissement de plaque d'acier utilisant un système de refroidissement de plaque d'acier selon l'une quelconque des revendications 1 à 5, le procédé étant caractérisé en ce que
    une région d'un écoulement d'eau sur une surface qui s'accumule sur la plaque d'acier lorsque l'eau de refroidissement est amenée à être pulvérisée à la quantité de pulvérisation maximale à partir du groupe de rangées de buses de pulvérisation en amont (22) est obtenue au préalable ; et
    le groupe de rangées de buses de pulvérisation en amont (22) est agencé de telle sorte que l'eau de refroidissement est pulvérisée à partir du groupe de rangées de buses de pulvérisation en amont (22) vers une position plus proche d'un côté en amont dans la direction de passage de plaque que la région.
EP11809748.4A 2010-07-22 2011-07-22 Système de refroidissement de plaque d'acier et procédé de refroidissement de plaque d'acier Active EP2540407B1 (fr)

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JP2010164522 2010-07-22
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PCT/JP2011/066742 WO2012011578A1 (fr) 2010-07-22 2011-07-22 Système de refroidissement de plaque d'acier et procédé de refroidissement de plaque d'acier

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JP (1) JP4903920B1 (fr)
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Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102847732B (zh) * 2012-08-20 2015-03-25 燕山大学 一种大型筒节热轧喷淋冷却方法
DE102012215599A1 (de) * 2012-09-03 2014-03-06 Sms Siemag Ag Verfahren und Vorrichtung zur dynamischen Versorgung einer Kühleinrichtung zum Kühlen von Metallband oder sonstigem Walzgut mit Kühlmittel
EP2767352A1 (fr) 2013-02-14 2014-08-20 Siemens VAI Metals Technologies GmbH Refroidissement d'une bande métallique avec dispositif de soupapes réglé selon la position
EP2777836A1 (fr) * 2013-03-14 2014-09-17 Siemens VAI Metals Technologies GmbH Dispositif de refroidissement doté de poutres de pulvérisation avec sorties allongées
WO2018055918A1 (fr) * 2016-09-23 2018-03-29 新日鐵住金株式会社 Dispositif et procédé de refroidissement de tôle d'acier laminée à chaud
WO2018056164A1 (fr) * 2016-09-23 2018-03-29 新日鐵住金株式会社 Dispositif et procédé de refroidissement de tôle d'acier laminée à chaud
WO2018119550A1 (fr) * 2016-12-26 2018-07-05 宝山钢铁股份有限公司 Mécanisme de refroidissement de feuillard en acier à bande mince coulé en continu et son procédé de refroidissement
RU2741033C1 (ru) * 2017-09-28 2021-01-22 ДжФЕ СТИЛ КОРПОРЕЙШН Производственная установка для производства стального листа и способ производства стального листа
DE102018202843A1 (de) * 2018-02-26 2019-08-29 Sms Group Gmbh Kühlvorrichtung zum Kühlen eines zu kühlenden Guts
KR102329511B1 (ko) * 2018-04-30 2021-11-19 주식회사 포스코 압연설비 및 압연방법
CN109374675A (zh) * 2018-12-14 2019-02-22 安徽工业大学 研究矩阵排布喷嘴快速冷却高温板(坯)传热的实验装置
PL3763836T3 (pl) * 2019-07-11 2023-09-11 John Cockerill S.A. Urządzenie chłodzące do nadmuchiwania gazu na powierzchnię przemieszczającej się taśmy
CN113245381B (zh) * 2020-03-24 2022-11-18 宝山钢铁股份有限公司 一种无缝钢管定径后的在线冷却系统及其冷却方法
CN114592112B (zh) * 2022-02-25 2023-03-17 东北大学 一种钢板回火后柔性冷却装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851042A (en) 1955-10-11 1958-09-09 British Thomson Houston Co Ltd Cooling equipment
US3533261A (en) 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled
DE2023799A1 (de) 1969-05-16 1970-11-19 General Electric Co., Sehenectady, N.Y. (V.St.A.) Temperaturregelsystem für einen Walzenrolltisch
GB2062520A (en) 1979-11-09 1981-05-28 Sumitomo Metal Ind Cooling sheet metal with water sprays
JPH10180338A (ja) 1996-12-24 1998-07-07 Kawasaki Steel Corp 熱間仕上圧延におけるスケール疵防止方法
EP0997203B1 (fr) 1998-10-31 2004-02-11 SMS Demag AG Procédé et système pour contrôler des lignes de refroidissement
WO2008035510A1 (fr) 2006-09-19 2008-03-27 Nippon Steel Corporation Procédé de refroidissement d'une plaque en acier

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63118018A (ja) * 1986-11-07 1988-05-23 Sumitomo Metal Ind Ltd 厚鋼板の冷却方法
JP3287253B2 (ja) * 1997-01-29 2002-06-04 日本鋼管株式会社 高温鋼板の冷却方法
JP3276318B2 (ja) * 1997-08-28 2002-04-22 三菱重工業株式会社 鋼板端部の冷却装置
CN201346566Y (zh) * 2008-12-29 2009-11-18 中冶南方工程技术有限公司 中厚钢板控制冷却侧喷系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851042A (en) 1955-10-11 1958-09-09 British Thomson Houston Co Ltd Cooling equipment
US3533261A (en) 1967-06-15 1970-10-13 Frans Hollander Method and a device for cooling hot-rolled metal strip on a run-out table after being rolled
DE2023799A1 (de) 1969-05-16 1970-11-19 General Electric Co., Sehenectady, N.Y. (V.St.A.) Temperaturregelsystem für einen Walzenrolltisch
GB2062520A (en) 1979-11-09 1981-05-28 Sumitomo Metal Ind Cooling sheet metal with water sprays
JPH10180338A (ja) 1996-12-24 1998-07-07 Kawasaki Steel Corp 熱間仕上圧延におけるスケール疵防止方法
EP0997203B1 (fr) 1998-10-31 2004-02-11 SMS Demag AG Procédé et système pour contrôler des lignes de refroidissement
WO2008035510A1 (fr) 2006-09-19 2008-03-27 Nippon Steel Corporation Procédé de refroidissement d'une plaque en acier

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
VEREIN DEUTSCHE R EISENHÜTTENLEUTE, BERICHT ÜBER DEN METEC CONGRESS 94 VOM 20. BIS 22. JUNI 1994 ;, 1994, Düsseldorf, XP055316131
YI ZHENG ET AL.: "?Distributed model predictive control for plant-wide hot-rolled strip laminar cooling process", JOURNAL OF PROCESS CONTROL;, October 2009 (2009-10-01), pages 1427 - 1437, XP055316128

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EP2540407A4 (fr) 2013-11-13
WO2012011578A1 (fr) 2012-01-26
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KR20120120972A (ko) 2012-11-02
CN102834193A (zh) 2012-12-19
BR112012024915A2 (pt) 2016-07-12
EP2540407A1 (fr) 2013-01-02
KR101266736B1 (ko) 2013-05-28
JP4903920B1 (ja) 2012-03-28
JPWO2012011578A1 (ja) 2013-09-09

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