JPH08168804A - Device for controlling coiling temperature of hot rolled stock - Google Patents

Abstract

PURPOSE: To estimate speed variation of steel in cooling equipment and to obtain the optimum water injecting pattern by using an estimated speed pattern prepared based on various kinds of information of a finishing mill. CONSTITUTION: This device is provided with a speed estimating device 8 for estimating the speed of a part S(i) of the steel in the cooling equipment R based on the estimated speed pattern prepared based on speed control information, rolling length and the finishing speed of the steel S and calculating device 9 for the quantity of cooling water for calculating the quantity of cooling water of the part S(i) from the estimated speed and actual data of the temp. and thickness on the outlet side of the finishing mill. Opening and closing of each water injecting bank are controlled in accordance with water injecting pattern in each water injecting bank which is determined based on the quantity of cooling water with water injecting pattern calculating device 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-rolled steel coiling temperature control device for controlling hot-rolled hot-rolled steel material at a predetermined coiling temperature by cooling the hot-rolled hot-rolled steel material in a cooling facility. It is a thing.

[0002]

2. Description of the Related Art Generally, in hot rolling equipment for steel products, the temperature of the steel material at the exit side of the finishing mill is adjusted by adjusting the rolling speed (finishing speed) mainly in the finishing mill upstream of the cooling equipment. The finishing outlet temperature) is controlled to a desired temperature.

Further, in the cooling equipment installed downstream of the finishing rolling mill, the temperature of the steel material (winding) on the inlet side of the winder installed downstream of the cooling equipment is adjusted by adjusting the amount of cooling water for cooling the rolled material. The taking temperature) is controlled to a desired temperature.

Thus, by controlling the finish outlet temperature and the coiling temperature to desired temperatures, uniform mechanical properties of the steel material can be secured. That is, in order to make the mechanical properties of the steel material uniform, it is necessary that the finishing temperature control and the winding temperature control be simultaneously performed with high accuracy.

However, since both of these temperature controls are individually performed, fluctuations in the finishing outlet speed due to the finishing temperature control become disturbances in the winding temperature control.

FIG. 5 shows a conventional coiling temperature control apparatus for hot rolled steel material. In the figure, 1 is a finish rolling machine for steel material S as a rolled material, 3 is a winding machine for steel material S, and 4 is a finish rolling machine. It is a finishing outlet side thermometer that measures the temperature of the steel material S that is discharged from the apparatus 1 and is conveyed to the cooling equipment.

Further, 5 is a finishing delivery side thickness gauge for measuring the thickness of the steel material S after finish rolling, 6 is a finishing speed detector for measuring the conveying speed of the steel material S from the finishing rolling mill 1 to the cooling equipment R, 7
Is a winding thermometer for measuring the temperature after cooling by the cooling facility R.

The cooling facility R comprises a cooling zone 2a for feedforward control and a cooling zone 2b for feedback control.

Further, 8 is a speed predicting device for predicting the speed of the steel material S based on the output of the finishing speed detector 6, and 9 is the prediction result and the above-mentioned finishing outlet thermometer 4 and finishing outlet plate thickness gauge 5.
This is a cooling water amount calculation device that calculates the cooling water amount according to each detection output of.

Further, 10 is a water injection pattern calculation device for determining a water injection pattern based on the calculated cooling water amount,
Reference numeral 11 denotes a bank opening / closing device that controls opening / closing of the bank according to the water injection pattern.

Next, the operation will be described. Here, the steel material portion S (i) which is a part of the steel material S immediately below the finishing outlet side thermometer 4 will be considered. Now, the speed when the steel material portion S (i) is just below the finishing outlet side thermometer 4 is the same as the finishing speed Vf in the finishing rolling mill 1 at that time. Therefore, in the speed predicting device 8, the finishing speed Vf From the speed record,
An average predicted velocity V'when the steel material portion S (i) reaches the cooling zone 2a of the cooling facility R and is cooled is calculated.

Next, in the cooling water amount calculation device 9, the predicted speed V'of the steel material S in the cooling facility R, the finish outlet temperature by the finish outlet thermometer 4, the finish outlet plate thickness by the finish outlet plate thickness gauge 5, etc. From the actual data, the amount of cooling water required to cool the steel material portion S (i) to the target winding temperature is calculated.

Further, like the steel material S (i), the amount of cooling water is similarly calculated for the portions before and after the steel material portion S (i), and in the water injection pattern calculation device 10, the cooling zone 2a of the cooling equipment R is calculated. The cooling water pouring pattern, that is, the pattern of the pouring water amount of each pouring bank forming the cooling facility R is determined.

At this time, in consideration of the response delay of the cooling facility R, the water injection pattern is calculated so that the water injection is started earlier.

[0015]

Since the conventional hot-rolled steel coiling temperature control device is constructed as described above, the finish when the steel material portion S (i) exists directly under the finish-side thermometer. In order to predict the speed of the steel material portion S (i) in the cooling equipment R using the actual value of the speed, the speed of the steel material portion S (i) reaches the cooling equipment R from directly below the finishing outlet thermometer 4. There was a problem that it could not be dealt with in the case of a sudden change in the period.

For example, in the conventional speed prediction method, the finishing speed Vf at which the steel material portion S (i) is directly below the finishing temperature gauge 4 is shown.
(I) and the finish side thermometer 4 before the steel part S (i)
By calculating the acceleration of the finishing speed Vf from the finishing speed Vf (i-1) immediately below the finishing outlet side thermometer 4 of the steel material portion S (i-1) that has passed below, and multiplying this by the gain G, Assuming that the acceleration rate is maintained until the steel material portion S (i) reaches the cooling equipment, the steel material portion S (i) is maintained.
The velocity V ′ in the cooling equipment R of (i) is V ′ = G ·
Prediction is performed based on the calculation result of (Vf (i-1) -Vf (i)) + Vf (i).

Each steel material portion S of the steel material S in this example
FIG. 6 shows the relationship between (1) to S (n) of the finishing speed Vf immediately below the finishing outlet thermometer 4, the speed V immediately below the cooling equipment R, and the predicted speed V ′ in the cooling equipment R.

Therefore, according to FIG. 6, the finishing speed Vf
In the range a, the acceleration gradually increases, so the predicted speed V ′ becomes smaller than the speed V and insufficient cooling occurs, and in the range b, the predicted speed V ′ changes at the switching portion from the range a to the range b. There is a problem that supercooling occurs due to the increase, and in addition, in the range c, the predicted speed V ′ becomes higher than the speed V, so that supercooling occurs.

The predicted speed in the cooling equipment R is a speed at a fixed point in the cooling equipment R, and the value is fixed by the gain G in the above calculation.

For example, when the gain G is 7.0, the predicted speed V'of the steel material portion S (i) in the cooling equipment R is
The steel material portion S (i) predicts the speed at a point in the cooling equipment R which has advanced by 7 units from the finishing outlet side thermometer 4.

Therefore, in the actual cooling, the water injection is performed in an arbitrary range in the cooling facility R, and therefore the predicted speed V '
However, there is a problem that the cooling speed V is different and overcooling or undercooling occurs.

Further, conventionally, since table data having a fixed value obtained by converting the above-mentioned response delay of the cooling facility R into a distance is prepared and the water injection pattern is calculated using this, if the finishing speed Vf varies greatly. However, there is a problem that overcooling or undercooling occurs because the distance corresponding to the response delay does not match.

The present invention has been made in order to solve the above problems, and by using the predicted speed pattern created based on various speed information of the finish rolling mill, the speed of the steel material in the cooling equipment can be improved. An object of the present invention is to obtain a coiling temperature control device for hot-rolled steel that can predict fluctuations and obtain an optimum water injection pattern (required cooling water injection amount) corresponding to the fluctuations.

According to the present invention, the speed of the steel material in the cooling equipment is predicted using the speed pattern prepared in advance from the rolling length and the finishing speed as well as the temperature on the finishing entry side and the length from the tip of the steel article on the finishing entry side. By doing so, it is an object of the present invention to obtain a coiling temperature control device for hot-rolled steel that can obtain an optimum water injection pattern corresponding to this.

According to the present invention, a hot-rolled steel material capable of obtaining an optimum water-injection pattern corresponding to the speed of the steel material within the water-injection range after limiting the water-injection area where water is actually injected into the steel material It is an object of the present invention to obtain a winding temperature control device of.

According to the present invention, the water injection timing can be corrected for the steel material portion for which the required water amount has been calculated based on the predicted speed, in accordance with the predicted speed, so that the water injection can be performed without shifting the water injection timing. An object of the present invention is to obtain a coiling temperature control device for hot-rolled steel material, which is capable of accurately controlling coiling temperature by pouring a required amount of cooling water into various places.

[0027]

According to a first aspect of the present invention, there is provided a hot-rolled steel coiling temperature control device based on a predicted speed pattern created on the basis of speed control information, a rolling length and a finishing speed of a steel material. A speed prediction device that predicts the speed of the steel material part in the cooling equipment, and a cooling water amount calculation device that calculates the cooling water amount of the steel material part from the actual data of the predicted speed, the finish outlet temperature, and the finish outlet plate thickness are provided. The opening / closing device controls the opening / closing of each water injection bank according to the water injection pattern in each water injection bank determined by the water injection pattern calculation device based on the above.

A hot-rolled steel coiling temperature control device according to a second aspect of the present invention includes a finishing-side thermometer for measuring the finishing-side temperature of a steel material hot-rolled by a finishing rolling mill, and the finishing-side thermometer. A length measuring device that measures the length from the tip of the steel material directly below the thermometer, and on the finishing output side of the finishing rolling mill, a rolling length measuring device that measures the rolling length from the distance from the tip of the steel material is provided,
In the speed prediction device, using the speed pattern table created in advance based on the finishing inlet temperature, the length of the steel material by the length measuring instrument, the rolling length and the finishing speed of the steel material on the finishing outlet side, It is designed to predict the speed of the steel material part in the cooling equipment.

In the coiling temperature controller for hot rolled steel according to the third aspect of the present invention, the speed prediction predicts the speed at which the steel material reaches the cooling equipment and is cooled from the finishing speed output by the finishing speed detector. The amount of cooling water is calculated based on the equipment and the predicted data of the predicted speed, the finish outlet temperature of the finish rolling mill, and the finish outlet plate thickness, and from this amount of cooling water, the speed predicting device is filled with water in the cooling facility. And a cooling water amount calculation device that recalculates the cooling water amount is provided, and the water injection pattern is calculated based on the recalculated cooling water amount.

The hot-rolled steel coiling temperature control device according to the invention of claim 4 is provided with a water injection pattern calculation device for calculating a water injection pattern based on the predicted speed predicted by the speed prediction device and the response delay time of the cooling equipment, Depending on the above water injection pattern,
The opening and closing of each water injection bank is controlled by a bank opening and closing device.

[0031]

According to the first aspect of the present invention, there is provided a speed control device for a rolling mill disposed upstream of a cooling facility, wherein the coiling temperature control device for hot rolled steel material is speed control information such as a steel material acceleration rate and maximum speed. Is calculated, based on the calculation result, a speed pattern in the cooling equipment is created by the speed prediction device, the speed of the steel material in the cooling equipment is predicted, and the cooling water amount and the water injection pattern are utilized by using the prediction result. Determine and control the opening and closing of the bank according to this water injection pattern to achieve optimum winding temperature control.

The hot-rolled steel coiling temperature control device according to the second aspect of the present invention stores in advance the speed pattern table based on the correlation between the inlet temperature and the outlet temperature of the finish rolling mill, the steel material length, and the like. The speed of the steel material is predicted according to a certain speed pattern, the amount of cooling water and the water injection pattern are determined using this prediction result, and the bank is opened and closed according to this water injection pattern to realize the optimum coiling temperature control.

In the coiling temperature controller for hot rolled steel according to the third aspect of the present invention, after limiting the water injection range in the cooling equipment, the speed of the steel material in this water injection range is predicted, and cooling is performed using this prediction result. The amount of water and the water injection pattern are determined, and the opening and closing of the bank is controlled according to this water injection pattern to realize the optimum winding temperature control.

In the coiling temperature controller for hot rolled steel according to the invention of claim 4, the time delay from when the cooling water is poured in the cooling equipment to when it hits the hot rolled steel is predicted,
The water injection pattern is selected moment by moment, and the opening and closing of the bank is controlled according to each of these water injection patterns to achieve optimum winding temperature control.

[0035]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a finish rolling machine for steel material S as a rolled material, 3 is a winder for steel material S, 4 is a finish rolling machine for measuring the temperature of the steel material S that exits the finish rolling machine 1 and is conveyed to a cooling facility. It is a side thermometer.

Further, 5 is a finish delivery side thickness gauge for measuring the plate thickness of the steel material S after finish rolling, 6 is a finishing speed detector for measuring the conveying speed of the steel material S from the finishing rolling mill 1 to the cooling equipment R, 7
Is a winding thermometer for measuring the temperature after cooling by the cooling facility R.

The cooling facility R is composed of a cooling zone 2a for feedforward control and a cooling zone 2b for feedback control.

Further, 8 is a speed predicting device for predicting the speed of the steel material S on the basis of the outputs of the finishing speed detector 6 and the outputs of the finishing rolling speed control device and the rolling length measuring device which will be described later, and 9 is this prediction. The cooling water amount calculation device calculates the amount of cooling water according to the results and the detection outputs of the finish outlet side thermometer 4 and the finish outlet side plate thickness gauge 5.

Further, 10 is a water injection pattern calculation device for determining a water injection pattern based on the calculated cooling water amount,
Reference numeral 11 denotes a bank opening / closing device that controls opening / closing of the bank according to the water injection pattern.

Further, 12 is the velocity at the tip of the steel material S, the acceleration rate, the deceleration rate, the maximum speed, and the final velocity at the tail end of the steel material S is calculated from the measured values, and this is input to the speed prediction device 8 as speed control information. This is a finishing rolling speed control device.

Further, 13 is a rolling length measuring device for measuring the rolling length from the distance from the tip of the steel material S on the exit side of the finish rolling mill 1, and the measurement output is also inputted to the speed predicting device 8.

Next, the operation will be described. First, the finish rolling speed controller 12 calculates the speed at the tip of the steel material S, the acceleration rate, the deceleration rate, the maximum speed, and the final speed at the tail end of the steel material S as speed information. Then, the speed information calculated by the finish rolling speed control device 12 and the length of the steel material S are transmitted to the speed prediction device 8 in advance.

On the other hand, the speed predicting device 8 creates a predicted speed pattern from this speed information, and measures the distance from the tip of the steel material S on the exit side of the finish rolling machine 1 to the rolling length measuring machine 13.
While measuring the length by using the above predicted speed pattern,
The speed V ′ of the steel material portion S (i) immediately below the finishing outlet thermometer 4 in the cooling facility R is predicted.

Next, in the cooling water amount calculation device 9, the predicted speed V'of the steel material S in the cooling equipment R, the finish outlet temperature by the finish outlet thermometer 4, the finish outlet sheet thickness by the finish outlet plate thickness gauge 5, etc. From the actual data, the amount of cooling water required to cool the steel material portion S (i) to the target winding temperature is calculated.

Further, like the steel material S (i), the amount of cooling water is similarly calculated for the portions before and after the steel material portion S (i), and in the water injection pattern calculation device 10, the cooling zone 2a of the cooling equipment R is calculated. The cooling water pouring pattern, that is, the pattern of the pouring water amount of each pouring bank forming the cooling facility R is determined.

In this embodiment, the speed control information of the finish rolling mill 1 is automatically obtained in advance by the finish rolling speed control device 12, so that the speed control information and the rolling length information of the steel material S can be more accurately measured. The change in speed of the steel material S on the winding side can be predicted, and therefore, the winding temperature can be controlled with higher accuracy using such a predicted value.

Example 2. FIG. 2 shows another embodiment of the present invention, in which 14 is a finishing-side thermometer for measuring the finishing-side temperature of the steel material S, and 15 is a tip of the steel material S immediately below the finishing-side thermometer 14. A length measuring device that measures the length of
Each of these measured outputs is input to the speed prediction device 8.

Reference numeral 16 is a speed pattern table determined in advance on the basis of target values such as finish exit temperature, finish exit plate thickness, steel grade, etc., finish entry temperature, and finish exit temperature of the steel material S. . In addition, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and duplicate description thereof will be omitted.

Next, the operation will be described. First, steel material S
While measuring the distance from the tip of the steel material S immediately below the finishing entry side thermometer 14 with the length measuring device 15, the finishing entry temperature of the steel article S is measured by the finishing entry thermometer 14.

Next, the speed predicting device 8 preliminarily calculates the target value of the distance from the length measuring device 15, the finish outlet temperature of the steel S, the finish outlet plate thickness, the type of steel, etc. and the actual finish inlet temperature. Using the speed pattern table 16 prepared, while measuring the distance from the tip of the steel material S on the delivery side of the finishing rolling mill 1 by the rolling length measuring device 13, the steel material portion S immediately below the finishing delivery side thermometer 4 is measured. The speed V ′ in the cooling zone 2a of the cooling facility R of (i) is predicted.

Next, in the cooling water amount calculation device 9, the predicted speed V ′ of the steel material S in the cooling equipment R, the finish outlet temperature by the finish outlet thermometer 4, the finish outlet plate thickness by the finish outlet plate thickness gauge 5, etc. From the actual data, the amount of cooling water required to cool the steel material portion S (i) to the target winding temperature is calculated.

Similarly to the steel material S, the amount of cooling water is similarly calculated for the portions before and after the steel material portion S (i), and the cooling water in the cooling zone 2a of the cooling equipment R is calculated in the water injection pattern calculation device 10. The water injection pattern, that is, the water injection amount pattern of each water injection bank forming the cooling facility R is determined.

In this embodiment, when the speed control of the finishing rolling mill 1 is performed by the intervention of the operator, the actual values of the finishing side temperature and the finishing side temperature, the length of the steel material S, and the speed pattern corresponding to the finishing speed are set. By predicting, the winding temperature control can be performed accurately with respect to the speed at the time of operator intervention.

Example 3. FIG. 3 is a flow chart showing a winding temperature control procedure by the winding temperature control device of another embodiment of the present invention. Referring to the drawing, in the winding temperature control device of FIG. 5, the speed of the cooling facility R in the range where injection is performed in the cooling facility R, which is predicted using the predicted speed V ′ at the center, for example, is V ″.

First, the predicted speed V'is obtained by speed prediction (step ST1), and the cooling water amount calculation device 9 calculates the cooling water amount of the cooling facility R using this predicted speed V '(step ST2). Next, the water injection range in the cooling facility R is calculated from this amount of cooling water (step ST
3).

Further, the velocity V ″ of the steel material portion S (i) in the center of the water injection range is re-estimated by the velocity predicting device 8 (step ST4), and the cooling water amount calculating device 9 is used to cool the steel material portion S (i). The amount of cooling in R is recalculated (step ST2).

In this way, similar calculations are performed before and after the steel material portion S (i), and the water injection pattern calculation device 10
The water injection pattern of the cooling equipment R is calculated by (step S
T5), the winding temperature is controlled.

Conventionally, using the predicted speed at the fixed point in the cooling equipment R, step ST1 → step ST2 →
Although the cooling amount is calculated in the order of step ST5, in this embodiment, the place where the steel material S is actually poured is limited, and then the speed of the steel material S is predicted to calculate a more appropriate amount of water injection. it can.

Example 4. FIG. 4 shows another embodiment of the present invention. In the figure, 17 is a line connecting the speed prediction device 8 and the water injection pattern calculation device 10. This line 17 indicates the predicted speed calculated by the speed prediction device 8. Notify the water injection pattern calculation device 10.

The same components as those shown in FIG. 1 are denoted by the same reference numerals, and the duplicated description will be omitted.

Next, the operation will be described. First, for the steel material portion S (i) immediately below the finish outlet temperature 4, the speed Vf immediately below the finish outlet thermometer 4 is measured, and the cooling facility R
Calculate the predicted velocity V'at.

Next, the predicted speed V'is loaded into the water injection pattern calculation device 10 to calculate the predicted speed V'here.
Water injection start correction distance ΔL from the response delay time of cooling equipment R
T is calculated, and the steel material portion S (i-ΔLT) located ahead of the steel material portion S (i) by ΔLT is the cooling zone 2 of the cooling facility R.
Water injection is started when the tip of the water injection range of a is reached.

The above water injection timing correction is carried out for the steel material portions S (1) to S (n) of the entire length of the steel material S to determine the water injection pattern. These processes are executed by the water injection pattern calculation device 10. Further, the response delay time of the cooling facility R, that is, the steel material S hot-rolled after the cooling water is injected
For the delay time until hitting, the one stored as table data is read and used.

According to this embodiment, the water injection timing is corrected for the steel material portion S (i) for which the required amount of water has been calculated based on the predicted speed, by correcting the water injection timing according to the predicted speed. Water can be reliably injected, and the coiling temperature of the hot rolled steel material can be controlled accurately.

[0065]

As described above, according to the invention of claim 1, the speed of the steel material portion in the cooling equipment is determined based on the speed control information, the rolling length, and the predicted speed pattern created based on the finishing speed of the steel material. A speed predicting device for predicting, a predicting speed, a finish outlet temperature, and a cooling water amount calculating device for calculating the cooling water amount of the steel material portion from the actual data of the finishing outlet plate thickness are provided, and the water injection pattern calculating device is based on the cooling water amount. Depending on the decided water injection pattern in each water injection bank,
Since each water injection bank is configured to be opened and closed, the speed variation of the steel material in the cooling equipment is predicted by the predicted speed pattern created based on various speed information of the finishing rolling mill, and the optimal water injection pattern ( The effect is that the required cooling water injection amount) can be obtained.

According to the invention of claim 2, from the tip of the steel material immediately below the finishing entry side thermometer for measuring the finishing entry side temperature of the steel material hot-rolled by the finishing rolling mill. And a rolling length measuring device for measuring the rolling length from the distance from the tip of the steel material on the finishing exit side of the finishing rolling mill, and a speed prediction device for the finishing feeding side. Using a speed pattern table created in advance based on the temperature, the length of the steel material by the length measuring instrument, the rolling length, and the finishing speed of the finishing side steel material, the speed of the steel material part in the cooling equipment for the steel material is predicted. Since it was configured as
In addition to the rolling length and finishing speed, the speed of the steel material in the cooling equipment was predicted using the speed pattern prepared in advance from the temperature on the finishing entrance side and the length from the steel tip on the finishing entrance side, and this was dealt with. This has the effect of obtaining the optimum water injection pattern (required cooling water injection amount).

According to the invention of claim 3, a speed predicting device for predicting a speed at which the steel material portion reaches the cooling equipment and is cooled from the finishing speed output from the finishing speed detector, and the predicted speed and The amount of cooling water is calculated based on the actual data of the finish outlet temperature and finish outlet plate thickness of the finishing rolling mill, and the speed predictor predicts the water injection range in the cooling equipment from this amount of cooling water, and A cooling water amount calculation device for calculating the cooling water amount was provided, and the water injection pattern was calculated based on the recalculated cooling water amount.Therefore, the water injection range in which the steel material is actually injected is limited, and then this water injection is performed. There is an effect that the velocity of the steel material in the range is predicted and the optimum water injection pattern corresponding to this is obtained.

According to the invention of claim 4, a water injection pattern calculation device for calculating a water injection pattern based on the predicted speed predicted by the speed prediction device and the response delay time of the cooling equipment is provided, and each water injection bank is provided in accordance with the water injection pattern. Since it was configured to control the opening and closing by the bank opening and closing device, the water injection timing is corrected by correcting the water injection timing according to the above estimated speed for the steel material part that calculated the required water amount based on the estimated speed. There is an effect that not only water can be injected, but also an optimal water injection pattern can be obtained in which a required amount of cooling water is injected into a required place to realize the winding temperature control with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram showing a coiling temperature control device for hot rolled steel according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a coiling temperature control device for hot rolled steel according to another embodiment of the present invention.

FIG. 3 is a flow chart of a water injection amount calculation processing procedure showing the operation of the coiling temperature control device for hot rolled steel according to another embodiment of the present invention.

FIG. 4 is a block diagram showing a coiling temperature controller for hot rolled steel according to another embodiment of the present invention.

FIG. 5 is a configuration diagram of a conventional hot-rolled steel coiling temperature control device.

FIG. 6 is an explanatory diagram showing the relationship between the predicted speed and the actual speed at the time of cooling in the cooling equipment of the conventional winding temperature control device.

[Explanation of symbols]

1 finishing rolling mill, 4 finishing delivery side thermometer, 5 finishing delivery side plate thickness gauge, 6 finishing speed detector, 8 speed predicting device, 9 cooling water amount calculating device, 10 water injection pattern calculating device, 11
Bank opening / closing device, 12 Finish rolling speed control device, 13
Rolling length measuring instrument, 14 Finishing entry side thermometer, 15 Length measuring instrument,
16 Speed pattern table, R cooling equipment.

Claims (4)

[Claims] 1. A finishing rolling speed control device for outputting speed control information of a steel material hot-rolled by a finishing rolling mill, and a rolling length is measured on a finishing delivery side of the finishing rolling mill from a distance from the tip of the steel material. Rolling length measuring device, the speed control information, a speed prediction device that predicts the speed of the steel material part in the cooling equipment based on the predicted speed pattern created based on the rolling length and the finishing speed of the steel material, and this predicted A cooling water amount calculation device that calculates the amount of cooling water required to cool the steel material part and the parts before and after it to the target coiling temperature from the actual data of the predicted speed, finish outlet temperature, and finish outlet plate thickness, and A water injection pattern calculation device that determines the water injection pattern in each water injection bank of the cooling facility based on the amount of cooling water, and a van that controls the opening and closing of each water injection bank according to the above water injection pattern. A coiling temperature control device for hot-rolled steel, which includes a switchgear. 2. A finishing entry side thermometer for measuring a finishing entry side temperature of a steel material hot-rolled by a finishing rolling mill, and a measurement for measuring a length from a tip end of the steel article immediately below the finishing entry side thermometer. A length measuring machine, on the finishing exit side of the finishing rolling mill, a rolling length measuring device that measures the rolling length from the distance from the tip of the steel material, the finishing entry side temperature, the length of the steel material measured by the length measuring machine, and the pressure Using a speed pattern table created in advance based on the finishing speed of the steel material on the extension and finishing side, a speed prediction device for predicting the speed of the steel material part in the cooling equipment for the steel material,
A cooling water amount calculation device that calculates the amount of cooling water required to cool the above steel material portion and the portions before and after this to the target coiling temperature based on the predicted data of the predicted speed, finish outlet temperature, and finish outlet plate thickness. And a hot-rolled steel material including a water-filling pattern calculation device that determines a water-filling pattern in each water-filling bank of the cooling facility based on the amount of cooling water, and a bank opening / closing device that controls opening / closing of each water-filling bank according to the water-filling pattern. Winding temperature control device. 3. A speed predicting device for predicting a speed at which a steel material portion reaches a cooling facility and is cooled from a finishing speed output from a finishing speed detector, and the predicted speed and the finishing delivery side of a finishing rolling mill. Temperature, based on the actual data of the finish delivery side plate thickness, calculate the cooling water amount, from this cooling water amount to the speed prediction device to determine the water injection range in the cooling equipment and re-predict the speed at the center of this water injection range, A cooling water amount calculation device for recalculating the cooling water amount, a water injection pattern calculation device for determining the water injection pattern in each water injection bank of the cooling facility based on the recalculated cooling water amount, and each water injection bank according to the water injection pattern For controlling the winding temperature of a hot rolled steel material, which comprises a bank opening / closing device for controlling opening / closing. 4. A speed predicting device for predicting a speed at which a steel material portion reaches a cooling facility and is cooled from a finishing speed output from a finishing speed detector, and the predicted speed and the finishing delivery side of a finishing rolling mill. A cooling water amount calculation device that calculates the amount of cooling water required to cool the steel material part and the parts before and after it to the target winding temperature based on the actual data of temperature and finish delivery side plate thickness, and the speed prediction device Winding of hot-rolled steel material equipped with a water injection pattern calculation device that calculates a water injection pattern based on the speed predicted by the above and the response delay time of the cooling facility, and a bank opening / closing device that controls the opening / closing of each water injection bank according to the water injection pattern. Temperature control device.