CN108633264B - Cooling device - Google Patents
Cooling device Download PDFInfo
- Publication number
- CN108633264B CN108633264B CN201580085790.0A CN201580085790A CN108633264B CN 108633264 B CN108633264 B CN 108633264B CN 201580085790 A CN201580085790 A CN 201580085790A CN 108633264 B CN108633264 B CN 108633264B
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- water tank
- nozzle
- nozzles
- cooling apparatus
- 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.)
- Active
Links
Images
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/20—Temperature
- B21B2261/21—Temperature profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2263/00—Shape of product
- B21B2263/04—Flatness
- B21B2263/06—Edge waves
Landscapes
- 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)
- Nozzles (AREA)
Abstract
A cooling device of an embodiment of the present invention includes: a water tank including an accommodating space arranged above the material to be cooled and accommodating a refrigerant supplied from the outside; and a plurality of nozzles provided inside the housing space, each of the nozzles including one or more refrigerant inlet ports into which the refrigerant flows, the plurality of nozzles being disposed at a distance from a center portion of the housing space toward an edge portion of the housing space, and ejecting the refrigerant flowing in through the refrigerant inlet port toward the material to be cooled, a height of the refrigerant inlet port being proportional to a distance separating the refrigerant inlet port from the center portion of the housing space.
Description
Technical Field
The present invention relates to a cooling device, and more particularly, to a cooling device that pours cooling water into a predetermined width of a material to be cooled, based on a water level of a water tank provided above the material to be cooled.
Background
In general, in a hot rolling process for producing a rolled strip, a billet heated to a certain temperature in a heating furnace is rolled into a bar shape by primary rough rolling, a final rolling work is performed in a strip shape by a finishing mill, cooling water is poured into upper and lower portions of the strip while passing through a Run Out Table (Run Out Table) composed of a plurality of rolls to secure a coiling temperature, and then a hot rolled plate is produced in a spiral shape by a coiler.
The run-out table is a step of conveying a strip material, which is a material that is finish-rolled by heating in a heating furnace and rough rolling, before the strip material is finally curled by a curler, and in this step, the material is cooled to a target temperature to determine the material quality and strength of a product. During the cooling process, the retained water falling toward the widthwise central portion of the strip flows out through the edge portions of the strip, and the temperature of both edge portions is generally lower than that of the central portion. In this process, the first, previously cooled or supercooled edge portion undergoes volumetric contraction, and then the subsequent, cooled central portion begins to undergo volumetric contraction. Due to such temperature deviations, differences in the volume contraction time occur, which are represented by the wave shape of the strip.
In particular, in the cooling step in the hot rolling step, the strip is usually cooled at a high temperature of about 600 degrees or more, and therefore, depending on the type of steel, a phase transformation zone occurs during cooling to cause volume expansion, and the volume expansion occurs at the edge portion that is cooled before the center portion of the strip. Therefore, when the phase change of the edge portion of a certain section starts, the volume of the edge portion which is cooled first expands, and a phenomenon of volume contraction while being cooled occurs in the high-temperature central portion which has not entered the phase change section, which is a typical mechanism for generating the waveform of the edge portion.
Disclosure of Invention
Technical problem to be solved
The purpose of the present invention is to prevent the occurrence of edge waviness in a step of cooling a material to be cooled to a curling temperature.
Another object of the present invention is to provide a cooling device for a material to be cooled, which has a quick response and can stably supply cooling water.
Other objects of the present invention will become more apparent from the detailed description and the accompanying drawings.
(II) technical scheme
A cooling device of an embodiment of the present invention includes: a water tank including an accommodating space arranged above the material to be cooled and accommodating the refrigerant; and a plurality of nozzles including one or more refrigerant inlet ports provided in the housing space to allow the refrigerant to flow therein, the plurality of nozzles being disposed at a distance from a center portion of the housing space toward an edge portion of the housing space and injecting the refrigerant toward the material to be cooled, a height of the refrigerant inlet port being proportional to a distance by which the refrigerant inlet port is spaced from the center portion of the housing space.
The water tank may include a spray plate including a plurality of installation holes arranged at intervals and having an internal thread formed on an inner circumferential surface thereof, and the nozzle may include an external thread formed on an outer circumferential surface thereof and screwed and fastened to the internal thread of the installation hole, and a position of the nozzle may be adjusted by rotating the nozzle.
The plurality of nozzles may be arranged in a direction parallel to a width direction of the material to be cooled.
The above nozzle may include: a nozzle body including the male screw and disposed substantially perpendicular to the injection plate, the nozzle body including an injection flow path formed therein and an injection port formed at a lower end of the injection flow path; and a nozzle cover fastened to an upper portion of the nozzle body and having a plurality of the refrigerant inflow ports formed therein.
The nozzle cover may be screwed and fastened to the nozzle body, and the height of the refrigerant inlet may be adjusted by rotating the nozzle cover.
The injection plate may include a plurality of auxiliary installation holes which are spaced apart from each other so as to penetrate through one surface of the injection plate facing the material to be cooled and are located at a central portion of the accommodation space, and the cooling device may further include an auxiliary nozzle including an auxiliary inlet port which communicates with the plurality of auxiliary installation holes and is located at a height lower than the refrigerant inlet port.
The above-mentioned basin can include: an internal water tank including a side plate disposed in parallel to a direction of spacing the plurality of nozzles; and a supply pipe for supplying the refrigerant to the inside of the inner water tank, wherein the side plate includes an edge portion including an upper end higher than the central portion and an upper end of the central portion.
The upper end height of the edge portion may gradually increase toward the edge portion of the receiving space.
The cooling device may further include a mesh fixed to an inner circumferential surface of the inner water tank and arranged in parallel with a direction in which the plurality of nozzles are spaced apart from each other.
The mesh may include an upper mesh and a lower mesh positioned at a lower portion of the upper mesh.
The supply pipe may be disposed at the center of the receiving space, and the mesh may be disposed at both sides of the supply pipe and in contact with the supply pipe.
The above-mentioned basin can include: an internal water tank including the receiving space and a side plate arranged in parallel to a direction of spacing the plurality of nozzles; and an outer water tank disposed outside the inner water tank and surrounding the inner water tank, wherein the spray plate is disposed between the inner water tank and the outer water tank and is disposed higher than lower ends of the inner water tank and the outer water tank.
The water tank may further include an auxiliary receiving space formed at an upper portion of the spray plate between the inner water tank and the outer water tank.
A cooling apparatus of another embodiment of the present invention may include: a water tank including an accommodating space arranged above the material to be cooled and accommodating a refrigerant supplied from the outside; and a plurality of nozzles provided inside the housing space, the plurality of nozzles including a refrigerant inlet port for selectively allowing the refrigerant to flow therein according to a water level of the refrigerant, and a discharge port for discharging the refrigerant flowing therein toward the material to be cooled.
The height of the coolant inlet port may gradually increase in the width direction of the material to be cooled.
The water tank may include: an internal housing space for receiving the supply of the refrigerant; and an external housing space into which the refrigerant overflowing from the internal housing space flows, wherein the plurality of nozzles are provided in the external housing space.
The water tank may include a side plate for dividing the inner receiving space and the outer receiving space, and a central portion of the side plate may be lower than edge portions located on both sides of the central portion.
The height of the side plate corresponding to the width direction of the material to be cooled may be higher than the height of the plurality of nozzles.
The cooling device may further include an auxiliary nozzle including an auxiliary inlet provided at a center of the receiving space and disposed at a lower height than the plurality of refrigerant inlets, and the plurality of nozzles may be disposed at both sides of the auxiliary nozzle.
(III) advantageous effects
According to an embodiment of the present invention, it is possible to improve ease of manufacturing, pouring stability, and pouring responsiveness by improving high installation costs, complicated structures and materials in use, and frequent troubles due to a severe working environment, which are caused by a conventional edge shielding method. Therefore, the amount of cooling water can be easily changed in the width direction, whereby the overcooling of the edge portion of the steel sheet can be prevented, and the productivity and quality of the final product can be improved.
Drawings
Fig. 1 is a diagram schematically showing a general hot rolling apparatus.
Fig. 2 is a diagram illustrating the cause of the edge waveform generated in the cooling step.
Fig. 3 is a view showing a cooling device using a shield edge portion.
Fig. 4 is a diagram schematically showing a cooling device of an embodiment of the present invention.
Fig. 5 to 8 are diagrams illustrating the cooling device shown in fig. 4.
Fig. 9 and 10 are views showing states in which the cooling devices shown in fig. 5 and 8 are operated.
Fig. 11 and 12 are diagrams illustrating a process of adjusting the height of the nozzle shown in fig. 5.
Fig. 13 is a diagram showing a modification of the cooling apparatus shown in fig. 5.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below with reference to the attached fig. 1 to 10. The various embodiments of the present invention may be modified in various ways, and it should not be understood that the scope of the present invention is limited by the embodiments described below. The present embodiment is provided to explain the present invention in more detail to those skilled in the art to which the present invention pertains. Therefore, for a more clear description, the shapes of the respective members shown in the drawings may be exaggerated.
Fig. 1 is a diagram schematically showing a general hot rolling apparatus. As shown in fig. 1, the hot rolling apparatus includes: a heating furnace 11 for heating a slab (slab) 1; a roughing mill 12 for roughing the rolled material heated in the heating furnace 11; a finishing mill 13 for finishing-rolling a rough-rolled material (e.g., a bar); a Run Out Table (Run Out Table)14 that conveys a rolled material (for example, a strip (slip)) that is finish-rolled; and a crimper 15 for crimping the conveyed rolled material into a rolled sheet.
The billet 1 is rolled into a coil by passing through a heating furnace 11, a roughing mill 12, a finishing mill 13, a Run Out Table (Run Out Table)14, and a crimper 15 in this order. When the rough-rolled billet (or bar) 1 is advanced to the finishing rolling mill 13, the rolling speeds of a plurality of rolling mills disposed in the finishing rolling mill 13 are individually controlled to finish-roll the rolled material. In this way, all the work of curling the rolled material 1 into a coil by the curler 15 after the heating furnace 11 is heated is generally referred to as "hot rolling".
In the Run Out Table (Run Out Table)14 in the hot rolling step, as a step of conveying the strip 1 before the strip 1, which is the rolled material 1 subjected to the heating furnace 11 and rough rolling and finish rolling, is finally curled by the curler 15, the material quality and strength of the product are determined by cooling the strip 1 to a target temperature in the step. In this case, a problem of the waveform of the strip material as a shape defect due to cooling variation in the width direction, which is a persistent problem, occurs by the following mechanism.
Fig. 2 is a diagram illustrating the cause of the edge waveform generated in the cooling step. As shown in fig. 2, in the cooling process in the run-out Table (RunOut Table)14, the cooling water falling down to the center portion in the width direction of the strip 1 flows out through the edge portion of the strip 1, and therefore the temperature of the edge portion is generally lower than that of the center portion of the strip 1. In this process, the edge portions of the strip which were previously cooled or supercooled undergo volume contraction first, and then the central portion of the strip 1 which is subsequently cooled begins to undergo volume contraction. Due to such temperature deviation, the volume contraction time varies, which is expressed by the waveform shape of the strip 1.
In particular, in the cooling process in the hot rolling process, the strip 1 is cooled in a high temperature state of usually 600 degrees or more, and thus a phase transformation zone occurs during the cooling process depending on the steel type to cause volume expansion, which, as described above, occurs before the central portion of the strip 1 is cooled before the edge portion of the strip which is cooled first. Therefore, when the phase transition of the edge portion starts to occur in a certain fixed interval, the edge portion expands in volume toward the cooled edge portion, and a phenomenon of volume contraction while being cooled occurs in a high-temperature central portion that has not entered the phase transition interval, which is a typical mechanism of the waveform generation in the edge portion.
Fig. 3 is a diagram showing a strip cooling apparatus using a conventional shield edge. As shown in fig. 3, this apparatus is an apparatus for preventing overcooling of the edge portion of the conventional strip 1 by a method for preventing a wave from being generated at the edge portion. That is, in order to reduce the cooling deviation occurring in the width direction of the strip 1 when cooling is performed on the run-out table 14, Edge masking (Edge Mask) equipment 18 is attached to both ends of a lamellar tank (LaminarBank) 20.
Since the cooling water falling to the central portion in the width direction of the strip 1 flows out through the edge portion of the strip 1 during the cooling process, the temperature of the edge portion is lower than that of the central portion, and cooling deviation in the width direction occurs, and the edge portion shield 18 provided to improve such a problem is automatically position-controlled so that the cooling water poured from the layer tank 20 is not poured to the edge portion of at most 300mm in the entire width of the hot-rolled strip 1 or not poured to the edge portion of at most 150mm on one side, as a means for shielding the cooling water poured from the layer tank 20 so as not to be poured to both end portions of the strip 1.
However, the above-described edge supercooling preventing method has two problems of high cost for installing the equipment and difficulty in maintaining the equipment. The edge shield 18 is connected to a motor via a chain, power of the motor is transmitted to a drive shaft via the chain, and the edge shield 18 is connected to the drive shaft and moves in the width direction. In the hot rolling step, since the high-temperature strip of 600 ℃. Therefore, scale is formed on the motor portion, the drive shaft, and the bearing connecting the drive shaft and the chain, which are exposed to high temperature and corroded, and thus, an equipment failure frequently occurs due to overload of the motor.
In the case of a sensor (not shown) for detecting the position of the strip 1, the position detection is not smooth due to the generation of high-temperature steam, a control failure in the width direction frequently occurs, and it takes much time to fix the raw scale entering the connecting portion between the drive shaft and the chain and remove the fixed raw scale when the inspection edge portion is shielded 18. Such difficulty in maintenance and inspection frequently causes a problem that the important function of preventing supercooling at the edge portion becomes incomplete.
Fig. 4 is a diagram schematically showing a cooling device according to an embodiment of the present invention, and fig. 5 to 8 are diagrams showing the cooling device shown in fig. 4. The cooling device is arranged above a roller table 14 for conveying the strip 1 rolled by the final rolling mill 13.
As shown in fig. 5 and 8, the cooling device includes an inner water tank 20 and an outer water tank 30. The internal water tank 20 includes an internal housing space capable of housing the refrigerant, and the supply pipe 35 is disposed inside the internal housing space and supplies the refrigerant to the internal housing space. The supply pipe 35 is disposed substantially parallel to the width direction of the strip 1. The supply pipe 35 includes a plurality of supply holes 35a through which a refrigerant supplied from the outside passes
35a are accommodated in the internal accommodating space. On the other hand, unlike the present embodiment, the supply pipe 35 may be provided outside the internal housing space to supply the refrigerant to the internal housing space.
The mesh member is fixed to the inner circumferential surface of the inner water tank 20 and supported by the outer circumferential surface of the supply pipe 35. The mesh member includes an upper mesh 62 and a lower mesh 64, and has a rectangular cylinder shape disposed substantially parallel to the supply pipe 35.
The outer water tank 30 is provided outside the inner water tank 20, surrounds the inner water tank 20, and the open upper portion of the outer water tank 30 is closed from the outside by a cover 31. As shown in fig. 8, the front and rear side plates of the external water tank 30 are spaced apart from the front and rear side plates of the internal water tank 20.
The spray plates 40 are respectively provided between the front side plate of the inner water tank 20 and the front side plate of the outer water tank 30 and between the rear side plate of the inner water tank 20 and the rear side plate of the outer water tank 30, and by this structure, the spray plates 40 are respectively formed in the outer housing spaces located outside the inner housing spaces at the upper portions thereof.
The inner and outer receiving spaces are defined by front and rear side plates of the inner water tank 20, and as shown in fig. 5, the front and rear side plates include an edge upper end 20a located above the nozzle 50 and a central upper end 20b located above the auxiliary nozzle 60. At this time, the central portion upper end 20b is horizontally disposed, and the edge portion upper end 20a is upwardly obliquely disposed from one end (or both ends) of the central portion upper end 20 b.
As shown in fig. 5, the spray plate 40 includes a plurality of installation holes 41 and a plurality of auxiliary installation holes 42, and is disposed substantially parallel to the width direction of the strip 1 and positioned above the strip 1. In particular, the central portion (or the midpoint) of the spray plate 40 corresponds to the central portion (or the midpoint) of the strip 1, and the edge portions of the spray plate 40 correspond to the edge portions of the strip 1.
A plurality of auxiliary installation holes 42 are formed in the central portion of the injection plate 40, and a plurality of installation holes 41 are formed on both sides (only one side is shown in fig. 5) of the plurality of auxiliary installation holes 42. The auxiliary installation hole 42 is formed in a tapered shape (tapered type) having a cross-sectional area decreasing downward, and the installation hole 41 is formed in a straight cylindrical shape (straight type) having a thread formed on an inner peripheral surface.
The nozzles 50 are provided in the installation hole 41 and are spaced apart in the width direction of the strip 1. As shown in fig. 6, the nozzle 50 includes a nozzle body 52 and a nozzle cover 54, the nozzle cover 54 is fastened to the nozzle body 52 by screwing, and the nozzle body 52 is fastened to the installation hole 41 by screwing.
The nozzle cover 54 includes one or more refrigerant inlets 54a penetrating in the vertical direction, and the refrigerant inlets 54a communicate with the flow paths 53 of the nozzle body 52 in a state where the nozzle cover 54 is fastened to the nozzle body 52. The nozzle cover 54 includes a screw thread formed on an inner circumferential surface thereof, and the nozzle cover 54 is fastened to an upper end portion 57 of the nozzle body 52 by a screw-coupling manner.
The diameters of the upper end portion 57 and the lower end portion 55 of the nozzle body 52 are reduced to form a step. The nozzle body 52 includes a screw thread formed on an outer circumferential surface of the upper end portion 57, and is fastened to the screw thread of the nozzle cover 54 by screw coupling. The nozzle body 52 includes a screw formed on the outer peripheral surface of the lower end portion 55, and is fastened to a screw formed on the inner peripheral surface of the installation hole 41 by screw fastening. Therefore, the height of the nozzle 50 can be adjusted by the rotation of the nozzle body 52, and the height of the refrigerant inflow port 54a can be adjusted by the rotation of the nozzle cover 54.
The nozzle body 52 includes a flow path 53 formed therein and an injection port 53a formed at a lower end of the flow path 53, and the flow path 53 communicates with a refrigerant inlet 54 a. Since the upper end of the flow path 53 is formed in a tapered shape having an upwardly increasing cross-sectional area, the refrigerant can smoothly flow into the flow path 53 through the refrigerant inlet 54 a.
The auxiliary nozzle 60 is provided in the auxiliary installation hole 42, and the auxiliary nozzle 60 includes a refrigerant inflow port 62 communicating with the auxiliary installation hole 42. Since the auxiliary installation hole 42 is formed in a tapered shape with a cross-sectional area decreasing downward, the refrigerant can smoothly flow into the auxiliary installation hole 42 through the refrigerant inlet 62.
As shown in fig. 5, the nozzles 50 are provided on both sides (only one side is shown in fig. 5) with respect to the auxiliary nozzle 60, and the heights h1 to h6 of the upper ends of the nozzles 50 are increased in proportion to the distance d by which the nozzles 50 are spaced from the auxiliary nozzle 60 (or the central portion of the internal housing space). Therefore, the heights h1 to h6 of the refrigerant inlet 54a increase in proportion to the distance. The upper end height h0 of the auxiliary nozzle 60 is lower than the upper end heights h1 to h6 of the nozzles 50.
Fig. 9 and 10 are views showing the operating states of the cooling device shown in fig. 5 and 8. Next, an operation method of the cooling device will be described with reference to fig. 9 and 10. As described above, the coolant is supplied to the internal housing space of the cooling device (specifically, the internal water tank 20) through the supply pipe 35. The refrigerant is supplied to the internal housing space through the supply holes 35a, and foreign substances can be filtered through the mesh holes 64a of the lower mesh 64 and the mesh holes 62a of the upper mesh 62. At this time, it is preferable that the mesh holes 64a have a diameter larger than that of the mesh holes 62 a.
As shown in fig. 10, the refrigerant flows through the front side plate and the rear side plate of the inner tank 20 and flows into the external accommodation space. Next, as shown in fig. 9, the refrigerant flows into the auxiliary nozzle 60 through the refrigerant inlet 62 and is jetted toward the tapes 1, and flows into the nozzle 50 through the refrigerant inlet 54a and is jetted toward the tapes 1, according to the water level of the refrigerant stored in the external storage space.
That is, as the water level of the refrigerant increases, the refrigerant is first injected through the refrigerant inlet 62, and then the refrigerant is sequentially injected from the refrigerant inlet 54a located at the lowest position to the refrigerant inlet 54a located at the highest position. Therefore, when the worker wants to adjust the casting width of the refrigerant, the worker determines whether or not to supply the refrigerant to the nozzle 50 according to the level of the refrigerant when adjusting the level of the refrigerant in the external receiving space, thereby adjusting the cooling range of the strip 1.
At this time, as shown in fig. 9, the spray plate 40 is disposed higher than the lower end of the inner water tank 20 and the lower end of the outer water tank 30, and the refrigerant sprayed from the spray plate 40 is guided toward the lower portion of the inner water tank 20 and the lower portion of the outer water tank 30 protruding from the lower portion of the spray plate 40, thereby preventing the refrigerant from being sprayed to unnecessary portions.
The present invention has been described in detail with reference to preferred embodiments, but it is also possible to realize a plurality of embodiments in a different manner. Therefore, the technical spirit and scope of the claims described below are not limited to the preferred embodiments.
Modes for carrying out the invention
Preferred embodiments of the present invention will be described in more detail below with reference to fig. 11 to 13. The embodiments of the present invention may be modified in various ways, and therefore, the scope of the present invention should not be construed as being limited to the embodiments described below. A plurality of the embodiments are provided to explain the present invention in more detail to those skilled in the art to which the present invention pertains. Therefore, for a more clear description, the shapes of the respective members shown in the drawings may be exaggerated.
Fig. 11 and 12 are diagrams illustrating a process of adjusting the height of the nozzle shown in fig. 5. As previously explained, the height of the nozzle 50 can be adjusted by the rotation of the nozzle body 52, and the height of the refrigerant inflow port 54a can be adjusted by the rotation of the nozzle cover 54.
As shown in fig. 11, when the nozzle cover 54 is rotated, the height of the refrigerant inlet 54a is increased, and thus the refrigerant is prevented from flowing into the nozzle 50 through the refrigerant inlet 54a (compare with fig. 9). Conversely, when the height of the refrigerant inlet 54a is reduced by rotating the nozzle cover 54, the refrigerant can be caused to flow into the nozzle 50 through the refrigerant inlet 54 a. That is, the user can determine whether or not to eject the refrigerant through the nozzles 50 by rotating the nozzle cover 54 for each nozzle 50 regardless of the water level of the refrigerant (adjusting the water level of the refrigerant takes a long time and affects the entire nozzles 50), thereby making it possible to realize asymmetrical ejection of the refrigerant with respect to the center of the strip 1.
As shown in fig. 12, since the height of the refrigerant inlet 54a is increased when the nozzle body 52 is rotated, the refrigerant can be prevented from flowing into the nozzle 50 through the refrigerant inlet 54a (compare with fig. 9). Conversely, when the height of the refrigerant inlet 54a is reduced by rotating the nozzle body 52, the refrigerant can be caused to flow into the nozzle 50 through the refrigerant inlet 54 a. That is, by rotating the nozzle body 52 and determining whether or not to eject the refrigerant through each nozzle 50 with respect to the nozzle 50, it is possible to achieve asymmetrical ejection of the refrigerant at the center of the strip 1.
On the other hand, in the present embodiment, the case where the height of the refrigerant inlet 54a is adjusted by rotating the nozzle cover 54 or the nozzle body 52 has been described, but the scope of the present invention is not limited thereto, and the height of the refrigerant inlet 54a can be adjusted by another embodiment. In addition, the nozzle cover 54 or the nozzle body 52 may be rotated by a driving device such as a motor.
Fig. 13 is a diagram showing a modification of the cooling apparatus shown in fig. 5. Unlike fig. 5 shown previously, the refrigerant inflow port 52a may be formed at a side surface of the nozzle 50. As shown in fig. 13, the nozzles 50 are provided on both sides (only one side is shown in fig. 5) with respect to the sub-nozzle 60, and the heights h1 to h6 of the refrigerant inlet 54a increase in proportion to the distance d from the sub-nozzle 60 (or the central portion of the internal housing space).
The present invention has been described in detail by way of preferred embodiments, but it is also possible to realize embodiments in a different manner. Therefore, the technical spirit and scope of the claims described below are not limited to the preferred embodiments.
Industrial applicability
The present invention can be applied to various types of cooling devices.
Claims (18)
1. A cooling device is characterized in that a cooling device is provided,
the method comprises the following steps:
a water tank including an accommodating space arranged above the material to be cooled and accommodating the refrigerant; and
a plurality of nozzles including one or more refrigerant inflow ports provided in the housing space to allow the refrigerant to flow therein, the plurality of nozzles being disposed at intervals from a central portion of the housing space toward an edge portion of the housing space and injecting the refrigerant toward the material to be cooled,
the height of the refrigerant inlet is proportional to the distance separating the refrigerant inlet from the center of the housing space.
2. The cooling apparatus according to claim 1,
the water tank includes a spray plate including a plurality of installation holes arranged at intervals and having an internal thread formed on an inner circumferential surface thereof,
the nozzle includes a male screw formed on an outer peripheral surface thereof and screwed and fastened to the female screw of the installation hole, and a position of the nozzle is adjusted by rotating the nozzle.
3. The cooling apparatus according to claim 1 or 2,
the plurality of nozzles are arranged in a direction parallel to the width direction of the material to be cooled.
4. The cooling apparatus according to claim 2,
the above-mentioned nozzle includes:
a nozzle body including the male screw and disposed substantially perpendicular to the injection plate, the nozzle body including an injection flow path formed therein and an injection port formed at a lower end of the injection flow path; and
and a nozzle cover fastened to an upper portion of the nozzle body and having a plurality of the refrigerant inflow ports formed therein.
5. The cooling apparatus according to claim 4,
the nozzle cover is screwed and fastened to the nozzle body, and the height of the refrigerant inlet can be adjusted by rotating the nozzle cover.
6. The cooling apparatus according to claim 2,
the spray plate includes a plurality of auxiliary holes which are arranged at intervals so as to penetrate through one surface of the spray plate facing the material to be cooled and are located in a central portion of the housing space,
the cooling device further includes an auxiliary nozzle including an auxiliary inlet port communicating with the plurality of auxiliary installation holes and disposed at a height lower than the refrigerant inlet port.
7. The cooling apparatus according to claim 1,
the above-mentioned basin includes:
an internal water tank including a side plate disposed in parallel to a direction of spacing the plurality of nozzles; and
a supply pipe for supplying the refrigerant to the interior of the internal water tank,
the side plate includes an edge portion including an upper end higher than the central portion and an upper end of the central portion.
8. The cooling apparatus according to claim 7,
the height of the upper end of the edge part gradually increases toward the edge part of the accommodating space.
9. The cooling apparatus according to claim 7,
the cooling device further includes a mesh which is fixedly provided on an inner circumferential surface of the inner water tank and is arranged in parallel to a direction in which the plurality of nozzles are spaced apart from each other.
10. The cooling apparatus of claim 9,
the mesh includes an upper mesh and a lower mesh positioned below the upper mesh.
11. The cooling apparatus of claim 9,
the supply pipe is arranged at the center of the containing space,
the mesh is disposed on both sides of the supply pipe and is in contact with the supply pipe.
12. The cooling apparatus according to claim 2,
the above-mentioned basin includes:
an internal water tank including the receiving space and a side plate arranged in parallel to a direction of spacing the plurality of nozzles; and
an outer water tank disposed outside the inner water tank and surrounding the inner water tank,
the spray plate is disposed between the inner water tank and the outer water tank, and is disposed higher than lower ends of the inner water tank and the outer water tank.
13. The cooling apparatus of claim 12,
the water tank further includes an auxiliary receiving space formed at an upper portion of the spray plate between the inner water tank and the outer water tank.
14. A cooling device is characterized in that a cooling device is provided,
the method comprises the following steps:
a water tank including an accommodating space arranged above the material to be cooled and accommodating a refrigerant supplied from the outside; and
a plurality of nozzles provided inside the housing space, the plurality of nozzles including a refrigerant inlet port for selectively allowing the refrigerant to flow therein according to a water level of the refrigerant and a spray port for spraying the refrigerant flowing therein toward the material to be cooled,
the height of the coolant inlet port gradually increases in the width direction of the material to be cooled.
15. The cooling apparatus of claim 14,
the above-mentioned basin includes:
an internal housing space for receiving the supply of the refrigerant; and
an external housing space into which the refrigerant overflowing from the internal housing space flows,
the plurality of nozzles are disposed in the external receiving space.
16. The cooling apparatus of claim 15,
the water tank includes a side plate for dividing the inner receiving space and the outer receiving space,
the height of the central portion of the side plate is lower than that of the edge portions positioned on both sides of the central portion.
17. The cooling apparatus of claim 16,
the height of the side plate corresponding to the width direction of the material to be cooled is higher than the height of the plurality of nozzles.
18. The cooling apparatus of claim 14,
the cooling device further includes an auxiliary nozzle including an auxiliary inlet provided at a center of the accommodating space and disposed at a height lower than the plurality of refrigerant inlets,
the plurality of nozzles are disposed at both sides of the auxiliary nozzle.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2015-0181265 | 2015-12-17 | ||
| KR1020150181265A KR101726763B1 (en) | 2015-12-17 | 2015-12-17 | Apparatus for cooling |
| PCT/KR2015/013995 WO2017104881A1 (en) | 2015-12-17 | 2015-12-21 | Cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108633264A CN108633264A (en) | 2018-10-09 |
| CN108633264B true CN108633264B (en) | 2020-04-07 |
Family
ID=58579711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580085790.0A Active CN108633264B (en) | 2015-12-17 | 2015-12-21 | Cooling device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20190084021A1 (en) |
| EP (1) | EP3391977A4 (en) |
| JP (1) | JP2018538144A (en) |
| KR (1) | KR101726763B1 (en) |
| CN (1) | CN108633264B (en) |
| WO (1) | WO2017104881A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102010057B1 (en) * | 2017-12-11 | 2019-08-12 | 주식회사 포스코 | Cooling apparatus |
| KR102217531B1 (en) * | 2018-11-21 | 2021-02-19 | 주식회사 포스코 | Hot strip cooling apparatus and control system of the same |
| KR102300915B1 (en) * | 2020-05-27 | 2021-09-10 | 현대제철 주식회사 | Uniform cooling device for hot-rolled steel sheet and control method therefor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2684971Y (en) * | 2004-01-06 | 2005-03-16 | 朱萃汉 | A continuous casting two-cooling chamber casting blank gas cooling apparatus |
| CN1997759A (en) * | 2004-06-30 | 2007-07-11 | 株式会社Posco | Hot rolled strip cooling device with coolant header |
| KR101008071B1 (en) * | 2008-05-29 | 2011-01-13 | 주식회사 포스코 | Cooling Apparatus for Rolling Line |
| KR20120071711A (en) * | 2010-12-23 | 2012-07-03 | 주식회사 포스코 | Cooling header |
| CN104107839A (en) * | 2014-06-26 | 2014-10-22 | 武汉钢铁(集团)公司 | Method and device for improving super-rapid cooling evenness of hot rolled steel plate |
| KR101481616B1 (en) * | 2013-08-08 | 2015-01-12 | 주식회사 포스코 | Apparatus for cooling strip |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100311782B1 (en) * | 1996-08-14 | 2001-12-17 | 이구택 | Laminar flow cooling device enabling widthwise uniformed cooling |
| JP2000051921A (en) * | 1998-08-03 | 2000-02-22 | Nkk Corp | Cooling device and cooling method for high-temperature steel sheet |
| DE10025639A1 (en) * | 2000-05-24 | 2001-11-29 | Sms Demag Ag | Nozzle bar for cooling or descaling metal billets, especially rolled stock |
| KR100560805B1 (en) * | 2001-06-29 | 2006-03-14 | 주식회사 포스코 | Device for injecting oil depending on widths of strip |
| KR101330871B1 (en) * | 2011-10-28 | 2013-11-18 | 현대제철 주식회사 | Cooling device for rolling mill |
-
2015
- 2015-12-17 KR KR1020150181265A patent/KR101726763B1/en active IP Right Grant
- 2015-12-21 CN CN201580085790.0A patent/CN108633264B/en active Active
- 2015-12-21 US US16/063,638 patent/US20190084021A1/en not_active Abandoned
- 2015-12-21 EP EP15910802.6A patent/EP3391977A4/en not_active Withdrawn
- 2015-12-21 WO PCT/KR2015/013995 patent/WO2017104881A1/en active Application Filing
- 2015-12-21 JP JP2018531109A patent/JP2018538144A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2684971Y (en) * | 2004-01-06 | 2005-03-16 | 朱萃汉 | A continuous casting two-cooling chamber casting blank gas cooling apparatus |
| CN1997759A (en) * | 2004-06-30 | 2007-07-11 | 株式会社Posco | Hot rolled strip cooling device with coolant header |
| KR101008071B1 (en) * | 2008-05-29 | 2011-01-13 | 주식회사 포스코 | Cooling Apparatus for Rolling Line |
| KR20120071711A (en) * | 2010-12-23 | 2012-07-03 | 주식회사 포스코 | Cooling header |
| KR101481616B1 (en) * | 2013-08-08 | 2015-01-12 | 주식회사 포스코 | Apparatus for cooling strip |
| CN104107839A (en) * | 2014-06-26 | 2014-10-22 | 武汉钢铁(集团)公司 | Method and device for improving super-rapid cooling evenness of hot rolled steel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| KR101726763B1 (en) | 2017-04-13 |
| JP2018538144A (en) | 2018-12-27 |
| EP3391977A4 (en) | 2019-01-23 |
| US20190084021A1 (en) | 2019-03-21 |
| CN108633264A (en) | 2018-10-09 |
| WO2017104881A1 (en) | 2017-06-22 |
| EP3391977A1 (en) | 2018-10-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101374613B (en) | Cooling method of steel plate | |
| EP1935522B1 (en) | Reversing rolling mill with cooling facility and corresponding method of cooling a steel plate or sheet | |
| CN108633264B (en) | Cooling device | |
| CN100404154C (en) | Controllable cooling method for thick steel plate, thick steel plate manufactured by the controllable cooling method, and cooling device for the thick steel plate | |
| EP2540407B1 (en) | Steel plate cooling system and steel plate cooling method | |
| US9308563B2 (en) | Manufacturing method of hot-rolled steel sheet | |
| KR101052453B1 (en) | Cooling device and cooling method of hot rolled steel strip | |
| JP2007061838A (en) | Hot-rolling equipment and method for steel plate | |
| KR20120104415A (en) | Cooling device for hot-rolled steel sheets | |
| US11413670B2 (en) | Cooling device and cooling method of hot-rolled steel sheet | |
| KR101481616B1 (en) | Apparatus for cooling strip | |
| JP4954932B2 (en) | Manufacturing method of hot-rolled steel sheet | |
| TWI731415B (en) | Cooling device for hot-rolled steel sheet and cooling method for hot-rolled steel sheet | |
| JP4337157B2 (en) | Steel plate cooling method and apparatus | |
| KR101431037B1 (en) | Apparatus and method for cooling strip | |
| KR20190009368A (en) | Cooling method and cooling device for hot-rolled steel sheet | |
| KR101028801B1 (en) | Device for manufacturing high strength wires and the method thereof | |
| KR101649325B1 (en) | Apparatus for cooling strip | |
| JP2003048003A (en) | Method for manufacturing hot-rolled steel sheet | |
| JP5278580B2 (en) | Hot-rolled steel plate cooling device and cooling method | |
| KR101235767B1 (en) | Coil box | |
| KR102090549B1 (en) | Apparatus and method for controlling head's temperature of thick hot rolled steel plate | |
| RU23803U1 (en) | DEVICE FOR COOLING A RENT IN THE STREAM STREAM | |
| JP2005169453A (en) | Method for manufacturing hot-rolled steel strip | |
| KR20110120522A (en) | Device of a uniform laminar flow for cooling hot steel strip equipped to descaler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: Seoul, South Kerean Patentee after: POSCO Holdings Co.,Ltd. Address before: Gyeongbuk, South Korea Patentee before: POSCO |
|
| CP03 | Change of name, title or address | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230515 Address after: Gyeongbuk, South Korea Patentee after: POSCO Co.,Ltd. Address before: Seoul, South Kerean Patentee before: POSCO Holdings Co.,Ltd. |
|
| TR01 | Transfer of patent right |