Steel wire coil conveying equipment

Abstract

The present invention provides a steel wire coil conveying system that enables accurate measurement of the temperature of the dense and coarse parts of the steel wire coil. [Solution] The steel wire coil conveying equipment 1 is provided, comprising a conveyor 2 that conveys steel wire coils 5 along the conveying direction, a radiation thermometer 3 installed above the conveyor 2, and a back plate 4 installed below the conveyor 2, wherein the conveyor 2 is equipped with a plurality of conveying rolls 6 spaced apart along the conveying direction, the back plate 4 is provided with an opening 4a, the opening 4a is positioned to overlap with the gap 6a between two adjacent conveying rolls 6, and the radiation thermometer 3 has a linear measurement scanning range S that extends in the width direction, and the measurement scanning range S is directed towards the gap 6a between two conveying rolls 6.

Description

[Technical Field]

[0001] This invention relates to a conveying system for steel wire coils. [Background technology]

[0002] After hot rolling, the steel wire is transported on a conveyor in a spiral shape, for example, by a laing head. On the conveyor, the steel wire is shaped into non-concentric, overlapping rings. Hereinafter, the steel wire in this non-concentric, overlapping ring shape is referred to as a steel wire coil. The steel wire coil is transported by the conveyor to a controlled cooling facility and cooled at a predetermined cooling rate.

[0003] Incidentally, a steel wire coil consists of multiple rings made of steel wires that overlap each other. As a result, the steel wire coil has dense sections where the steel wires overlap closely and loose sections where the overlap is minimal. When the steel wire coil is viewed from above, the dense sections are located on both sides in the width direction perpendicular to the conveying direction, while the loose sections are located in the center of the width direction. In the dense sections, the steel wires overlap, so the cooling rate tends to be slower, while in the loose sections, the steel wires do not overlap, so the cooling rate tends to be faster. Thus, the cooling rate tends to differ between the dense and loose sections of the steel wire coil, which presents a problem in that the entire steel wire coil cannot be cooled uniformly.

[0004] Furthermore, in the regulated cooling line for steel wire rods, the temperature of the steel wire rod coils is measured from the side using a radiation thermometer installed on the side of the conveyor. As a result, the surface temperature of the dense parts facing the radiation thermometer can be measured relatively accurately, but the surface temperature of the coarse parts located outside the measurement range of the radiation thermometer cannot be measured accurately.

[0005] Furthermore, taking advantage of the characteristics of radiation thermometers that can measure the temperature in a certain range, it has been considered to install radiation thermometers above the conveyor to measure the surface temperature of both the dense and coarse parts of steel wire coils being transported on the conveyor. However, the temperature of steel wire coils being transported on the conveyor is not always constant, and relatively hot and relatively cold steel wire coils are transported in no particular order. For example, if relatively hot steel wire coils are transported continuously, the temperature of the transport rolls that make up the conveyor and the back plate installed below the conveyor will gradually rise. Subsequently, when relatively cold steel wire coils are transported, the temperature of the transport rolls and back plate may exceed the surface temperature of the relatively cold coarse part of the steel wire coil. In this case, the surface temperature of the dense part of the relatively hot steel wire coil can be measured, but the surface temperature of the coarse part cannot be measured accurately. In order to understand the temperature variation of steel wire coils, it is necessary to accurately measure the surface temperature of the coarse part.

[0006] Patent documents 1 to 3 describe conventional methods for measuring the temperature of steel wire. However, none of the methods described in patent documents 1 to 3 accurately measured the temperature of the dense and coarse parts of the steel wire coil. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2002-039865 [Patent Document 2] Japanese Patent Application Publication No. 10-192948 [Patent Document 3] Special Publication No. 2019-505384 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] The present invention has been made in view of the above circumstances, and aims to provide a steel wire coil conveying device that enables accurate measurement of the temperature of the dense and coarse parts of the steel wire coil. Means for Solving the Problems

[0009] To solve the above problems, the present invention adopts the following configurations. [1] A conveyance facility having a function of measuring the surface temperature of a steel wire rod coil while conveying the hot-rolled steel wire rod coil, the conveyance facility comprising: a conveyor that conveys the steel wire rod coils, which are placed in non-concentric, mutually overlapping ring shapes, along the conveyance direction; a radiation thermometer installed above the conveyor to measure the surface temperature of the steel wire rod coil; a back plate installed below the conveyor; wherein the conveyor is provided with a plurality of conveyance rolls arranged at intervals along the conveyance direction, the back plate is provided with an opening, the opening of the back plate is arranged at a position overlapping the gap between two adjacent conveyance rolls, the radiation thermometer has a linear measurement scanning range extending in the width direction orthogonal to the conveyance direction, and the measurement scanning range of the radiation thermometer is directed toward the gap between the two conveyance rolls. [2] The conveyance facility for a steel wire rod coil according to [1], wherein a mesh material is arranged in the opening. [3] The conveyance facility for a steel wire rod coil according to [1], wherein a distance H between the conveyor and the radiation thermometer satisfies the range of formula (1). (R c / tan50°)≦H≦{(1000ψ / r s ) 2 -R c 2} 0.5 …(1) Here, in formula (1), R c is 1 / 2 the width [mm] in the width direction occupied by the steel wire rod coil placed on the conveyor, ψ is the diameter [mm] of the steel wire rod constituting the steel wire rod coil, and r s is the spatial resolution [mrad] in the instantaneous field of view of the radiation thermometer. [4] The opening has a rectangular shape with long sides extending along the width direction and short sides extending along the conveyance direction, A distance M between the short sides is larger than a width 2R in the width direction occupied by the steel wire rod coil placed on the conveyor c , and a distance N between the long sides is larger than a diameter ψ of a steel wire rod constituting the steel wire rod coil, the conveyance facility for a steel wire rod coil according to [1]. [5] The radiation thermometer continuously measures the surface temperature of the steel wire rod coil passing through the measurement scanning range, a plurality of measurement positions are set in the measurement scanning range, and a maximum value of the measurement temperature during continuous measurement at the measurement positions is output as the surface temperature of the steel wire rod constituting the steel wire rod coil, the conveyance facility for a steel wire rod coil according to [1]. [Effect of the Invention]

[0010] According to the present invention, it is possible to provide a conveyance facility for a steel wire rod coil that enables accurate measurement of temperatures of a dense portion and a loose portion of the steel wire rod coil. [Brief Description of the Drawings]

[0011] [Figure 1] A schematic diagram showing a conveyance facility for a steel wire rod coil that is an embodiment of the present invention. [Figure 2] A schematic perspective view showing a main part of the conveyance facility for a steel wire rod coil that is an embodiment of the present invention. [Figure 3] A schematic plan view showing a main part of the conveyance facility for a steel wire rod coil that is an embodiment of the present invention. [Figure 4] A schematic plan view showing a back plate provided in the conveyance facility for a steel wire rod coil that is an embodiment of the present invention. [Figure 5] A diagram showing a relationship between a radiation angle and a measurement error when the surface temperature of a steel wire rod is measured by a radiation thermometer. [Figure 6] A diagram for explaining the height of the installation position of the radiation thermometer in the conveyance facility for a steel wire rod coil that is an embodiment of the present invention. [Figure 7]This figure illustrates a method for measuring the surface temperature of a steel wire coil using a steel wire coil conveying equipment, which is an embodiment of the present invention. [Figure 8] This figure illustrates a method for measuring the surface temperature of a steel wire coil using a steel wire coil conveying equipment, which is an embodiment of the present invention. [Figure 9] This figure illustrates a method for measuring the surface temperature of a steel wire coil using a steel wire coil conveying equipment, which is an embodiment of the present invention. [Figure 10] A graph showing an example of the measurement results of the surface temperature of a steel wire coil using a steel wire coil conveying equipment that is an embodiment of the present invention. [Figure 11] A graph showing an example of measurement results for the surface temperature of steel wire coils using a steel wire coil conveying system of a comparative configuration. [Modes for carrying out the invention]

[0012] The following describes a steel wire coil conveying system that is an embodiment of this specification. The conveying equipment 1 of this embodiment has the function of measuring the surface temperature of the steel wire coil 5 while conveying the steel wire coil 5 after hot rolling. This function is realized by the conveyor 2 and the radiation thermometer 3. More specifically, as shown in Figures 1 to 4, the conveying equipment 1 of this embodiment comprises the conveyor 2, the radiation thermometer 3 installed above the conveyor 2, and the back plate 4 installed below the conveyor 2.

[0013] The steel wire coil 5 being transported is placed on the conveyor belt 2. That is, the steel wire coil 5 is wound spirally by the winding machine 11 of the hot rolling equipment, and then placed on the conveyor belt 2 for transport. The steel wire coil 5 is shaped into a nearly circular ring shape with non-concentric rings overlapping each other. Here, the individual circular rings that make up the steel wire coil 5 are sometimes called steel wire rings 5a. Also, the direction perpendicular to the transport direction L of the steel wire coil 5 is defined as the width direction W. The width of the steel wire coil 5 along the width direction W is 2R c (mm) is specified. cR is half the width [mm] of the width W occupied by the steel wire coil 5 placed on the conveyor 2. c This can be said to be the radius of the steel wire ring 5a, and 2R c This can be said to be the diameter of the steel wire ring 5a.

[0014] The conveyor 2 is equipped with multiple conveying rolls 6. The conveying rolls 6 are spaced apart along the conveying direction L of the steel wire coil 5. The length Lr of the conveying roll 6 is equal to the width 2R along the width direction W of the steel wire coil 5. c It is greater than (mm). Also, the distance Lg between the conveying rolls 6 is greater than the diameter of the steel wire ring 5a that makes up the steel wire coil 5. As a result, the steel wire coil 5 does not fall off the conveying rolls 6 during transport. Note that the distance Lg between the conveying rolls 6 is the shortest distance between the roll surfaces of adjacent conveying rolls 6.

[0015] The radiation thermometer 3 is positioned above the conveyor 2. The radiation thermometer 3 has a linear measurement scanning range S that extends in the width direction W. The radiation thermometer 3 is capable of measuring the surface temperature of the steel wire coil 5 as it passes through the measurement scanning range S. The measurement scanning range S of the radiation thermometer 3 is directed towards the gap 6a between the conveying rolls 6. Furthermore, it is preferable that the radiation thermometer 3 be positioned above the center of the steel wire coil 5 in the width direction W as it is being conveyed on the conveyor 2. The installation height of the radiation thermometer 3 from the conveyor 2 will be described later.

[0016] The back plate 4 is positioned below the conveyor rolls 6. The back plate 4 is made of a metal plate such as a steel plate. The distance between the conveyor rolls 6 and the back plate 4 is, for example, about 50 to 300 mm. The back plate 4 is attached to a support part (not shown) that supports the conveyor rolls 6 in order to improve the overall strength of the conveyor 2. The back plate 4 also plays a role in receiving and collecting scale that falls off the steel wire coils 5 during conveyance.

[0017] The back panel 4 of this embodiment is provided with an opening 4a. The opening 4a of the back panel 4 is positioned to overlap with the gap 6a between two adjacent conveying rolls 6. That is, the opening 4a is located directly below the gap 6a between the two conveying rolls 6. The measurement scanning range S of the radiation thermometer 3 is directed towards the gap 6a. Therefore, the opening 4a of the back panel 4 is located on the extension of the measurement scanning range S of the radiation thermometer 3.

[0018] Figure 4 shows the back plate 4 and one steel wire ring 5a that constitutes the steel wire coil 5. As shown in Figure 4, the opening 4a has a rectangular shape when viewed from the radiation thermometer 3 side. The longer side of the rectangle is parallel to the width direction W. The shorter side is parallel to the conveying direction L. The distance M between the shorter sides is the width 2R occupied by the steel wire coil 5 placed on the conveyor 2. c It is preferable that the size be larger. The distance N between the long sides is preferably larger than the diameter ψ of the steel wire constituting the steel wire coil 5. It is more preferable that the size of the opening 4a occupies the same range as the overlapping measurement scanning range S of the radiation thermometer 3 when it overlaps with the surface of the back plate 4, or a range larger than the overlapping measurement scanning range S.

[0019] A metal mesh material may be fitted into the opening 4a of the back panel 4.

[0020] Next, we will explain the radiation thermometer 3 in detail. Since the cross-sectional shape of the steel wire constituting the steel wire coil 5 is circular, the surface of the steel wire is curved. Therefore, when using a non-contact infrared radiation thermometer 3, it is necessary to eliminate the effect of the decrease in radiation intensity due to the radiation angle. If the effect of the decrease in radiation intensity is not taken into consideration, the accuracy of temperature measurement of the steel wire coil 5 will decrease significantly. In particular, when the angle of the surface of the steel wire with respect to the direction of incidence of infrared radiation (hereinafter referred to as the radiation angle) exceeds 50°, the radiation intensity decreases significantly, and the accuracy of temperature measurement decreases. Therefore, the distance between the steel wire coil 5 and the radiation thermometer 3 must be set to a distance that can neutralize the effect of the radiation angle. Specifically, the installation height of the radiation thermometer 3 relative to the conveyor 2 must be adjusted so that the measurement error due to the effect of the radiation angle is 1°C or less.

[0021] Therefore, we will consider the installation height of the radiation thermometer 3 with reference to Figures 5 and 6. Figure 5 shows the relationship between the radiation angle and the error in the measured temperature. In Figure 5, the semicircular line represents the contour line of the surface of a 5.2 mm diameter steel wire when viewed in cross-section. The horizontal axis is the dimension in the diameter direction of the steel wire, and the vertical axis is the difference between the output value of the measurement taken by the radiation thermometer 3 when the surface temperature of the steel wire heated to 800°C is measured, and the actual temperature (800°C). As shown in Figure 5, it can be seen that the difference between the measurement taken by the radiation thermometer 3 and the actual temperature (800°C) increases sharply as you approach the end in the diameter direction of the steel wire. In the example shown in Figure 5, the position where the difference begins to increase sharply corresponds to a radiation angle of 50°. The range in which the radiation angle is within 50° is a range of 1.6 mm from the center of the steel wire (a range of 3.2 mm in width). Within this range, the error is less than 1°C, and it can be seen that measurement is possible with relatively good accuracy. Here, the range in which the radiation angle to the surface of the steel wire is within 50° is referred to as the measurable range. If the measurement area of ​​the radiation thermometer 3 falls within the measurable range, it can be said that accurate measurement is possible.

[0022] As described above, in order to neutralize the effect of the radiation angle on the steel wire coil 5 and reduce the error to less than 1°C, the detection resolution of the radiation thermometer 3 must fall within a region unaffected by the radiation angle. By examining the spatial instantaneous field resolution of the radiation thermometer 3, which is unaffected by the radiation angle, based on the relationship between the radiation angle and emissivity, it can be determined that the resolution must be at least 3 pixels relative to the diameter ψ of the steel wire.

[0023] Specifically, it is preferable that the distance H between the conveyor 2 and the radiation thermometer 3 satisfies the range of equation (1).

[0024] (R c ( / tan50°)≦H≦{(1000ψ / r s ) 2 -R c 2} 0.5 …(1)

[0025] However, in equation (1), R c is the width [mm] of half the width W occupied by the steel wire coil 5 placed on the conveyor 2, ψ is the diameter [mm] of the steel wire constituting the steel wire coil 5, and r s This is the spatial resolution [mrad] in the instantaneous field of view of the radiation thermometer 3.

[0026] The following explains equation (1). When infrared radiation is emitted from the radiation thermometer 3 towards the steel wire coil 5 on the conveyor 2, the radiation angle of the infrared radiation is largest at the end of the steel wire coil 5 in the width direction W. Also, as mentioned above, if the radiation angle exceeds 50°, the measurement error becomes significantly larger. Therefore, the radiation angle at the end of the steel wire coil 5 in the width direction W on the conveyor 2 must be within 50°. In that case, the distance H between the conveyor 2 and the radiation thermometer 3 must satisfy the following equation (2).

[0027] tanθ=R c / H ≤ tan50° …(2)

[0028] By rearranging equation (2), we obtain equation (3).

[0029] R c / tan50°≦H …(3)

[0030] Next, in order to neutralize the effect of non-uniform radiation intensity on the surface of the steel wire, as mentioned above, a resolution of 3 pixels or more is required for the diameter ψ (mm) of the steel wire. Therefore, the spatial resolution r in the instantaneous field of view required for the radiation thermometer 3 is... s (mrad) must satisfy equation (4). Here, d(mm) in equation (4) is the straight-line distance between the radiation thermometer 3 and the end of the steel wire coil 5, as shown in Figure 6, and d is equal to H and R by the Pythagorean theorem. c It can be expressed in equation (5) using .

[0031] r s ×d / 1000 ≤ φ / 3 …(4)

[0032] d=(H 2 +R c 2 ) 0.5 …(5)

[0033] From equations (4) and (5), the installation condition equation for ensuring the required spatial resolution in the instantaneous field of view of the radiation thermometer 3 is given by equation (6).

[0034] H≦((1000φ / r s ) 2 -R c 2 ) 0.5 …(6)

[0035] From equations (3) and (6), the installation height H is as given in equation (1).

[0036] Furthermore, the radiation thermometer 3 is configured to output the maximum value of the peak of the measured temperature during continuous measurement as the surface temperature of the steel wire. That is, the radiation thermometer 3 continuously measures the surface temperature of the steel wire coil 5 as it passes through the measurement scanning range S. Multiple measurement positions can be set within the measurement scanning range S. At each measurement position, the measured temperature rises sharply each time the steel wire ring 5a of the steel wire coil 5 passes over time. When the change in measured temperature over time is plotted on a graph with the measured temperature on the vertical axis and elapsed time on the horizontal axis, intermittent peaks in the measured temperature appear. The radiation thermometer 3 is configured to output the maximum value of these peaks as the surface temperature of the steel wire.

[0037] Next, we will explain how to measure the surface temperature of the steel wire coil 5 using the conveying equipment 1 shown in Figures 1 to 3.

[0038] As shown in Figures 1 to 3, after hot rolling, the steel wire is shaped into a spiral by a winding machine 11 and then placed on a conveyor 2. The steel wire placed on the conveyor 2 is shaped into non-concentric, overlapping rings, forming a steel wire coil 5. The steel wire rings 5a that make up the steel wire coil 5 are continuous with each other.

[0039] As the steel wire coil 5 is transported by the conveyor 2, it sequentially passes through the measurement scanning range S of the radiation thermometer 3. The radiation thermometer 3 continuously measures the surface temperature of the steel wire coil 5 as it passes through the measurement scanning range S. Multiple measurement positions are set within the measurement scanning range S, and the surface temperature of the steel wire coil 5 is continuously measured at each measurement position.

[0040] Figure 7 shows an example where the measurement position is set to the center of the width direction W of the steel wire coil 5. Figure 7 shows the measurement line S1 at the measurement position. Figure 8 is a graph showing the relationship between the measured temperature and elapsed time at the measurement position shown in Figure 7. As shown in Figure 8, as time progresses, each time the steel wire ring 5a constituting the steel wire coil 5 passes through the measurement line S1 in the measurement scanning range S, the measured temperature repeatedly rises and falls sharply, and intermittent peaks in the measured temperature appear. The maximum value of these peaks is the surface temperature of the steel wire.

[0041] The central position in the width direction W of the steel wire coil 5 shown in Figure 7 is a rough area where the steel wires do not overlap. In other words, the maximum value of the peak shown in Figure 8 indicates the surface temperature in the rough area.

[0042] In the rougher parts, the cooling rate is relatively high because the steel wires do not overlap. Therefore, the surface temperature of the rougher parts of the steel wire coil 5 is the lowest.

[0043] Looking at the graph of measured temperatures shown in Figure 8, a relatively constant, low-temperature distribution appears between the peaks. The measured temperature between these peaks is the background temperature. In other words, it is the measured temperature during the time when the steel wire ring 5a constituting the steel wire coil 5 is not passing through the measurement scanning range S.

[0044] In this embodiment, the transport equipment 1 is equipped with a back panel 4, but the opening 4a of the back panel 4 is directly below the measurement scanning range S of the radiation thermometer 3. Therefore, the temperature of the back panel 4 is not detected as background temperature. Also, the measurement scanning range S of the radiation thermometer 3 is Since the temperature of the conveyor rolls 6 is directed towards the gap 6a between the conveyor rolls 6, the temperature of the conveyor rolls 6 is not detected as the background temperature. Therefore, even if the temperature of the back plate 4 or the conveyor rolls 6 rises as the steel wire coil 5 is conveyed, this temperature rise is not reflected in the background temperature. Consequently, the background temperature remains relatively low.

[0045] This allows for a large temperature difference between the time the steel wire passes through and the time it does not, making it possible to continuously measure the temperature of the steel wire. In particular, it becomes possible to accurately measure the surface temperature of the rough part of the steel wire coil 5, which can be relatively cold.

[0046] It is believed that the background temperature is the temperature of the floor located below the back panel 4. Because the floor has a large heat capacity, even if it is affected by thermal radiation from the steel wire coil 5, the temperature will be almost the same as the ambient temperature in which the conveying equipment 1 is installed.

[0047] Furthermore, even if a mesh member is placed in the opening 4a, the mesh member has a smaller surface area that receives heat radiation from the steel wire coil 5, and the convective heat dissipation surface area increases, so the temperature of the mesh member will be significantly lower than that of the wire coil.

[0048] Furthermore, the distinction between the temperature when the steel wire coil 5 is passing through and the temperature when it is not passing through may be determined by artificial intelligence that has undergone machine learning.

[0049] Figure 9 shows the surface temperature measurement results when multiple measurement positions are set within the measurement scanning range S. In Figure 9, the symbols s1 to s8 are measurement lines corresponding to the multiple measurement positions. Measurement line s1 is the line through which the coarse part of the steel wire coil 5 passes. Measurement lines s7 and s8 are the lines through which the dense part of the steel wire coil 5 passes. Multiple steel wire rings 5a constituting the steel wire coil 5 pass intermittently through the measurement lines s1 to s8 below.

[0050] Furthermore, the graph shown at the bottom of Figure 9 plots the highest and lowest surface temperatures of the multiple steel wire rings 5a that intermittently passed through each measurement line s1 to s8. The highest and lowest temperatures here represent the highest and lowest temperatures of the multiple steel wire rings 5a contained in one steel wire coil 5. As is clear from Figure 9, both the highest and lowest temperatures are higher in measurement line s7, which passes through the dense part of the steel wire coil 5, than in measurement line s1, which passes through the coarser part. In addition, the graph in Figure 9 allows us to understand the distribution of surface temperature in the steel wire coil 5.

[0051] Regarding the surface temperature distribution, it can be seen that the temperature distribution in the width direction W of the steel wire coil 5 can be determined from the temperature differences between each measurement line s1 to s8. Furthermore, it can be seen that the temperature distribution in the transport direction L of the steel wire coil 5 can also be determined from the difference between the highest and lowest temperatures of each measurement line s1 to s8.

[0052] Furthermore, Figure 10 shows the results of measuring the temperature distribution of the steel wire coil 5 using the conveying equipment 1 of this embodiment. Figure 11 shows the results of measuring the temperature distribution of the steel wire coil 5 using a comparative conveying equipment equipped with a back plate without an opening.

[0053] In Figures 10 and 11, the horizontal axis represents the distance from the center of the steel wire coil 5 in the width direction W, and the vertical axis represents the surface temperature. Each plot shows the temperature at multiple measurement locations within the measurement scanning range S of the radiation thermometer 3. Furthermore, in Figures 10 and 11, the max temperature is the highest temperature in the steel wire coil 5, and the min temperature is the lowest temperature in the steel wire coil 5. The highest temperature in Figures 10 and 11 is approximately the temperature of the dense part, and the lowest temperature in Figures 10 and 11 is approximately the temperature of the coarse part.

[0054] Furthermore, in the comparative configuration, if the temperature of the back plate 4 is higher than the lowest temperature of the steel wire coil 5, a control mechanism is in place to forcibly set the measurement temperature to 450°C.

[0055] In the embodiment shown in Figure 10, it can be seen that the lowest temperature (coarse temperature) of the steel wire coil 5 can be accurately measured. On the other hand, in the comparative configuration shown in Figure 11, most of the lowest temperature (coarse temperature) of the steel wire coil 5 falls at the threshold of 450°C. Therefore, in the comparative configuration, the lowest temperature (coarse temperature) of the steel wire coil 5 cannot be accurately measured. This is because there is no opening 4a in the back plate 4, and the radiation thermometer 3 measured the back plate 4, which was in a relatively high temperature state, when the steel wire coil 5 was not passing through it.

[0056] As described above, the conveying equipment 1 of this embodiment makes it possible to accurately measure the temperature of the dense and coarse parts of the steel wire coil 5. [Explanation of Symbols]

[0057] 1…Conveying equipment 2... Conveyor 3... Radiation thermometer 4…Back plate 4a...Opening 5...Steel wire coil 5a...Steel wire ring 6…Conveyor Roll 6a...Void

Claims

1. A conveying device equipped with a function to measure the surface temperature of a steel wire coil while conveying the steel wire coil after hot rolling, A conveyor that transports the non-concentric, overlapping ring-shaped steel wire coils along the transport direction, A radiation thermometer is installed above the conveyor to measure the surface temperature of the steel wire coil, The conveyor is further equipped with a back panel installed below it, The conveyor is equipped with a plurality of conveying rolls that are spaced apart along the conveying direction. The aforementioned back panel is provided with an opening, The opening in the back panel is positioned to overlap with the gap between two adjacent conveying rolls. The aforementioned radiation thermometer has a linear measurement scanning range that extends in the width direction perpendicular to the transport direction, A conveying apparatus for steel wire coils, wherein the measuring scanning range of the radiation thermometer is directed towards the gap between the two conveying rolls.

2. The steel wire coil conveying equipment according to claim 1, wherein a mesh material is arranged in the opening.

3. The steel wire coil conveying equipment according to claim 1, wherein the distance H between the conveyor and the radiation thermometer satisfies the range of formula (1). (R ｃ / tan50°)≦H≦{(1000ψ / r ｓ ) ２ -R ｃ ２ } ０．５ …(1) However, in equation (1), R ｃ is the width [mm] of half the width in the width direction occupied by the steel wire coil placed on the conveyor, ψ is the diameter [mm] of the steel wire constituting the steel wire coil, and r ｓ is the spatial resolution [mrad] in the instantaneous field of view of the aforementioned radiation thermometer.

4. The opening is rectangular in shape, with its longer side aligned with the width direction and its shorter side aligned with the transport direction. The distance M between the short sides is the width 2R in the width direction occupied by the steel wire coil placed on the conveyor ｃ greater than, The steel wire coil conveying equipment according to claim 1, wherein the distance N between the long sides is greater than the diameter ψ of the steel wire constituting the steel wire coil.

5. The aforementioned radiation thermometer continuously measures the surface temperature of the steel wire coil as it passes through the measurement scanning range. The steel wire coil conveying equipment according to claim 1, wherein a plurality of measurement positions are set in the measurement scanning range, and the maximum value of the measurement temperature during continuous measurement at the measurement position is output as the surface temperature of the steel wire constituting the steel wire coil.

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