CN109590336B - Control system and method for steel billet spacing - Google Patents
Control system and method for steel billet spacing Download PDFInfo
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- CN109590336B CN109590336B CN201811398105.1A CN201811398105A CN109590336B CN 109590336 B CN109590336 B CN 109590336B CN 201811398105 A CN201811398105 A CN 201811398105A CN 109590336 B CN109590336 B CN 109590336B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 66
- 239000010959 steel Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000010079 rubber tapping Methods 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 37
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000033764 rhythmic process Effects 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/005—Control of time interval or spacing between workpieces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
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- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a control system and a control method for a steel billet space, which comprise a controller, a first thermal detector and a second thermal detector, wherein the first thermal detector and the second thermal detector are respectively connected with the controller; the first thermal detector and the second thermal detector are arranged beside the tapping roller way along the tapping roller way; wherein the second thermal detector is in front of the first thermal detector in the billet discharging direction; the first thermal detector and the second thermal detector are separated by a certain distance; wherein the distance from the first thermal detector to one end of the tapping roller mill side is less than the specified length of one steel billet. The invention can detect the condition that the head of two adjacent steel billets are not pushed against the tail of the furnace outlet roller way and the distance is too small, and automatically adjust the distance between the steel billets when the condition occurs, thereby preventing the accident that the steel billets need to be cut to be waste.
Description
Technical Field
The invention belongs to the technical field of automatic control of a continuous rolling production line, and particularly relates to a control system and method for a billet spacing.
Background
The two-bar process in the steel rolling mill consists of a heat accumulating type stepping heating furnace and a bar rolling production line. The normal production flow is as follows: and (3) feeding the steel billet into a furnace, heating the steel billet in the heating furnace to the required temperature, feeding the steel billet into a rolling area through a furnace discharging roller way for rolling, and discharging a finished product in a finish rolling area. During normal production, due to the influences of a plurality of factors such as the change (1-3 seconds) of the action period of the walking beam in the heating furnace area, the uneven wear of the roll surface of the discharging roller way, the bending and slipping of steel billets, the cascade speed regulation of the rolling area and the like, the steel tapping rhythm cannot be ensured to be completely consistent, and the hourly output is restricted. Therefore, the two-bar process always requires operators to shorten the steel-making time as much as possible to improve the production rhythm, but the two-bar process is influenced by the factors to cause steel-making accidents. When a corresponding post finds that the steel is connected and gives an alarm, the flying shears must be started to break off in due time to pull apart the red steel space, so that accidents are avoided, and the condition of cutting waste is often generated. If the steel time is prolonged to avoid accidents, the hourly production is directly lost, and the two are difficult to be selected. The careful operation of the post of the two-bar process can not be lost all the time, and the result of untimely breakage can cause the fine rolling steel piling or flying shear not to cut the head and the tail.
Disclosure of Invention
A first object of the present invention is to overcome the disadvantages and drawbacks of the prior art and to provide a billet spacing control system capable of automatically adjusting the spacing between billets to prevent the occurrence of an accident that the billets should be scrapped.
A second object of the present invention is to provide a method for controlling a billet pitch based on the first object control system.
The first purpose of the invention is realized by the following technical scheme: a control system for the distance between steel billets comprises a controller, a first thermal detector and a second thermal detector, wherein the first thermal detector and the second thermal detector are respectively connected with the controller; the first thermal detector and the second thermal detector are arranged beside the tapping roller way along the tapping roller way; wherein the second thermal detector is in front of the first thermal detector in the billet discharging direction; the first thermal detector and the second thermal detector are separated by a certain distance; wherein the distance from the first thermal detector to one end of the tapping roller mill side is less than the specified length of one steel billet.
Preferably, the first thermal detector and the second thermal detector are spaced apart by 1.2 meters.
Preferably, the controller is connected with a run-out roller way operation control system.
Preferably, the controller is a controller in a run-out roller way operation control system.
Preferably, the controller is a PLC.
The second purpose of the invention is realized by the following technical scheme: a method for controlling a billet pitch based on the system for controlling a billet pitch according to the first aspect of the present invention includes the steps of:
step S1: firstly, setting the distance between a first thermal detector and a second thermal detector as the distance which needs to be satisfied by the tail of one billet at the head of two adjacent billets and the head of the next billet; the first thermal detector and the second thermal detector which are arranged beside the furnace discharging roller way respectively carry out thermal detection work; when the steel billet passes through the first thermal detector, the first thermal detector sends a thermal detection signal to the controller, and when the steel billet passes through the second thermal detector, the second thermal detector sends a thermal detection signal to the controller;
the controller judges whether the two adjacent steel billets on the discharging roller way have the situation that the heads do not push against the tails but the distance is too small according to the thermal detection signals; the method specifically comprises the following steps:
when the controller detects the heat detection signal sent by the first heat detector, the counter value is added by a 1;
when the controller detects the heat detection signal sent by the second heat detector, the counter value is increased by a 2;
when the controller detects that the heat detection signal sent by the first heat detector disappears, adding a3 to the counter value;
when the controller detects that the heat detection signal sent by the second heat detector disappears, the counter value is cleared;
when the counter value reaches 2a1+ a2+ a3, the controller judges that the two adjacent billets on the furnace roller way have the condition that the heads and the tails of the two billets are not pushed, but the distance between the two billets is too small; wherein a1, a2 and a3 are constant;
step S2, when the controller judges that the two adjacent steel billets on the tapping roller way have the condition that the heads do not push against the tails but the distance between the two adjacent steel billets is too small, controlling the tapping roller way to stop running; and then, restarting the furnace discharging roller way when the controller detects that the heat detection signal sent by the second heat detector disappears.
Preferably, the value of a1 is 1.
Preferably, the value of a2 is 1.
Preferably, the value of a3 is 1.
Compared with the prior art, the invention has the following advantages and effects:
(1) the control system for the steel billet spacing comprises a controller, a first thermal detector and a second thermal detector, wherein the first thermal detector and the second thermal detector are respectively connected with the controller; the first thermal detector and the second thermal detector are arranged beside the tapping roller way along the tapping roller way; wherein the second thermal detector is in front of the first thermal detector in the billet discharging direction; the first thermal detector and the second thermal detector are separated by a certain distance; wherein the distance from the first thermal detector to one end of the tapping roller mill side is less than the specified length of one steel billet. In the invention, the controller can judge whether the adjacent two billets in the tapping roller way have the condition that the head is not pushed against the tail but the distance is too small by detecting the heat detection signals of the first heat detector and the second heat detector, thereby controlling the operation of the tapping roller way according to the condition, realizing the adjustment of the distance between the billets and preventing the accident that the billets need to be cut.
(2) In the method for controlling the billet spacing, when two thermal detectors including the first thermal detector and the second thermal detector exist in a control system, the controller can determine whether the distance between the head and the tail of two adjacent billets is too small through the counting function of the counter, wherein in the process that each billet runs in a discharging roller way, the billet firstly passes through the first thermal detector and then passes through the second thermal detector, when the controller detects a thermal detection signal sent by the first thermal detector, the counter value of the counter is added with a1, and when the controller detects a thermal detection signal sent by the second thermal detector, the counter value of the counter is added with a 2; when the controller detects that the heat detection signal sent by the first heat detector disappears, adding a3 to the counter value; when the controller detects that the heat detection signal sent by the second heat detector disappears, the counter value is cleared; when the distance between the head and the tail of two adjacent billets is too small, the head of the next billet reaches the first thermal detector because the tail of the first billet does not pass through the second thermal detector, in the invention, the counter value reaches the value of 2a1+ a2+ a3, and when the distance between the head and the tail of two adjacent billets is large enough, namely the distance between the head and the tail of the first billet does not pass through the second thermal detector, the head of the next billet does not reach the first thermal detector, and the counter value is cleared. Therefore, in the invention, whether the distance between two adjacent billets is too small without ejecting the billets can be judged by whether the counter value reaches the value of 2a1+ a2+ a3, and when the condition occurs, the tapping roller table is controlled to stop running for a corresponding time so as to adjust the distance between two adjacent billets to be proper, so that the judgment is rapid and simple.
Drawings
FIG. 1 is a schematic view of the installation of two thermal detectors in the control system of the present invention.
Fig. 2 is a block circuit diagram of the control system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
Examples
The embodiment discloses a control system for a billet spacing, which comprises a controller, a first thermal detector and a second thermal detector, wherein the first thermal detector and the second thermal detector are respectively connected with the controller; the first thermal detector and the second thermal detector are arranged beside the tapping roller way along the tapping roller way; wherein the second thermal detector is in front of the first thermal detector in the billet discharging direction; the first thermal detector and the second thermal detector are separated by a certain distance; wherein the distance from the first thermal detector to one end of the tapping roller mill side is less than the specified length of one steel billet. In the figure 1, the triangle is a thermal detector, and the circle is a roller on a furnace outlet roller way.
As shown in fig. 1, when the run-out table in the two-bar process of the steel mill applied by the control system of this embodiment is composed of two sections of tables, the run-out table 1 section and the run-out table 2 section are sequentially arranged from the heating furnace side to the rolling mill side, wherein the run-out table 1 section includes 9 rollers, the length is about 10 meters, the run-out table 2 section includes 5 rollers, the length is about 6 meters, in this embodiment, as shown in fig. 1, beside the run-out table, the first thermal detector and the second thermal detector are sequentially arranged from the heating furnace side to the rolling mill side.
In this embodiment, the first thermal detector is arranged at a distance from the rolling mill side end of the tapping table that is less than the prescribed length of one of the billets so that the head of the billet has entered the rolling mill when the tail of the billet is in the tapping table between the first thermal detector and the second thermal detector. In this embodiment, the first thermal detector and the second thermal detector are disposed at positions closer to the rolling mill than the tapping table is.
In the present embodiment, the distance between the first thermal detector and the second thermal detector is set according to the distance that the first billet and the next billet of the two adjacent billets need to satisfy, for example, when the distance between the tail of the first billet and the head of the next billet of the two adjacent billets needs to satisfy 1.2 meters, the distance between the first thermal detector and the second thermal detector is set to 1.2 meters.
In this embodiment, the controller may directly use a PLC in the two-bar process of the steel mill, and the PLC is a controller in the run control system of the tapping table at the same time, and is used to control the run of the run control system of the tapping table. The controller can also be additionally provided with a PLC; when a PLC is additionally arranged, the PLC is connected with the run-out roller way operation control system, and the stop and start control of the run-out roller way can be realized by sending a signal to the run-out roller way operation control system through the PLC.
In this embodiment, the first thermal detector and the second thermal detector are used for detecting hot metal, and can detect a steel billet moving to a detection position on the tapping roller way. When hot metal is detected, a heat detection signal is sent to the controller.
The embodiment also discloses a control method of the steel billet spacing based on the control system, and the method can detect whether the distance between two adjacent steel billets on the discharging roller way is too small without jacking the ends. In the embodiment, the condition that the head does not push against the tail but the distance is too small refers to the condition that the tail of the first billet is closer to the head of the next billet in two adjacent billets but the tail does not push against the tail; the steps of the control method in this embodiment are as follows:
step S1: firstly, setting the distance between a first thermal detector and a second thermal detector as the distance which needs to be satisfied by a first billet and a next billet of two adjacent billets; the first thermal detector and the second thermal detector which are arranged beside the furnace discharging roller way respectively carry out thermal detection work; the steel billet runs on a discharging roller way, when the steel billet passes through the first thermal detector, the first thermal detector sends a thermal detection signal to the controller, and when the steel billet passes through the second thermal detector, the second thermal detector sends a thermal detection signal to the controller;
the controller judges whether the two adjacent steel billets on the discharging roller way have the situation that the heads do not push against the tails but the distance is too small according to the thermal detection signals; the method specifically comprises the following steps:
when the controller detects the heat detection signal sent by the first heat detector, the counter value is added by a 1;
when the controller detects the heat detection signal sent by the second heat detector, the counter value is increased by a 2;
when the controller detects that the heat detection signal sent by the first heat detector disappears, adding a3 to the counter value;
when the controller detects that the heat detection signal sent by the second heat detector disappears, the counter value is cleared;
when the counter value reaches 2a1+ a2+ a3, the controller judges that the two adjacent billets on the furnace roller way have the condition that the heads and the tails of the two billets are not pushed, but the distance between the two billets is too small; wherein a1, a2 and a3 are constant; in the embodiment, the values of a1, a2 and a3 are all 1, that is, when the counter value reaches 4, the controller determines that the two adjacent billets on the furnace roller way have the condition that the head and the tail of the two billets are not pushed, but the distance between the two adjacent billets is too small.
And step S2, when the controller judges that the two adjacent steel billets on the tapping roller have the condition that the heads do not push against the tails but the distance between the heads is too small, the controller sends a stop signal to the operation control system of the tapping roller, and the operation control system of the tapping roller controls the tapping roller to stop operating. And then, restarting the furnace discharging roller way when the controller detects that the heat detection signal sent by the second heat detector disappears, namely the counter value is set to a 1.
In this embodiment, the control principle implemented by the control method is as follows:
when the first billet of two adjacent billets passes through the first thermal detector, the first thermal detector detects a thermal signal and sends the thermal signal to the controller, and the value of the counter is increased by 1; the first billet continues to run, when the first billet passes through the second heat detector, the second heat detector detects a heat signal and sends the heat signal to the controller, and the value of the calculator is changed into 2 after being added with 1; when the first steel billet continues to run and leaves the first heat detector, the value of the calculator is added with 1, and then the value is changed into 3; when the first steel billet does not leave the second heat detector in the running process, the later steel billet reaches the first heat detector, the value of the calculator is added with 1 and is changed into 4, and the distance between two adjacent steel billets is smaller than the distance between the first heat detector and the second heat detector, namely the distance between the two adjacent steel billets is too small. And when the tail part of the first steel billet is separated from the second heat detector in the running process, the latter steel does not reach the first heat detector, and the value of the calculator is cleared, wherein the value is cleared when the distance between the tail part of the first steel billet and the head part of the latter steel billet is greater than or equal to the distance between the first heat detector and the second heat detector. Therefore, the controller can judge whether the two adjacent steel billets on the furnace roller way have the situation that the heads and the tails of the two adjacent steel billets do not push against each other but the distance between the two adjacent steel billets is too small through judging whether the counter value reaches 4.
When the run-out roller way stops running, the length of the steel billet is greater than the distance from the first thermal detector to one end of the side of the mill of the run-out roller way, so that when the tail part of the first steel billet is positioned between the first thermal detector and the second thermal detector in the run-out roller way, the head part of the first steel billet reaches the mill area, and when the run-out roller way stops running, the first steel billet is dragged into the mill due to the running of the mill. And then, when the controller detects that the heat detection signal sent by the second heat detector disappears, namely the counter value is set to be 1, the tail of the first steel billet is separated, and the tail of the first steel billet and the head of the next steel billet are pulled apart by a certain distance, so that the operation of a furnace discharging roller way can be started. At the moment of starting the furnace discharging roller way, the counter is not cleared and is set to 1 because the next steel billet reaches the position of the first thermal detection signal.
In the embodiment, the controller can determine whether the adjacent two billets have a condition that the head of the billet is not connected with the tail of the billet but the distance between the two billets is too small by detecting the heat detection signals of the first heat detector and the second heat detector, so that the operation of the discharging roller way is controlled according to the condition, the distance between the billets is adjusted, and the billet is prevented from being scrapped. In the control method of the embodiment, when the controller determines that the two adjacent billets have the condition that the head does not push against the tail but the distance between the heads is too small, the tapping roller way is controlled to stop running, and when a certain distance is pulled between the two adjacent billets, the tapping roller way is controlled to run again.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (8)
1. A control method of a steel billet spacing based on a control system of the steel billet spacing is characterized in that the control system of the steel billet spacing comprises a controller, a first thermal detector and a second thermal detector which are respectively connected with the controller; the first thermal detector and the second thermal detector are arranged beside the tapping roller way along the tapping roller way; wherein the second thermal detector is in front of the first thermal detector in the billet discharging direction; the first thermal detector and the second thermal detector are separated by a certain distance; wherein the distance from the first thermal detector to one end of the side of the tapping roller mill is less than the specified length of a steel billet;
the method for controlling the billet spacing comprises the following steps:
step S1: firstly, setting the distance between a first thermal detector and a second thermal detector as the distance which needs to be satisfied by the tail of one billet at the head of two adjacent billets and the head of the next billet; the first thermal detector and the second thermal detector which are arranged beside the furnace discharging roller way respectively carry out thermal detection work; when the steel billet passes through the first thermal detector, the first thermal detector sends a thermal detection signal to the controller, and when the steel billet passes through the second thermal detector, the second thermal detector sends a thermal detection signal to the controller;
the controller judges whether the two adjacent steel billets on the discharging roller way have the situation that the heads do not push against the tails but the distance is too small according to the thermal detection signals; the method specifically comprises the following steps:
when the controller detects the heat detection signal sent by the first heat detector, the counter value is added by a 1;
when the controller detects the heat detection signal sent by the second heat detector, the counter value is increased by a 2;
when the controller detects that the heat detection signal sent by the first heat detector disappears, adding a3 to the counter value;
when the controller detects that the heat detection signal sent by the second heat detector disappears, the counter value is cleared;
when the counter value reaches 2a1+ a2+ a3, the controller judges that the two adjacent billets on the furnace roller way have the condition that the heads and the tails of the two billets are not pushed, but the distance between the two billets is too small; wherein a1, a2 and a3 are constant;
step S2, when the controller judges that the two adjacent steel billets on the tapping roller way have the condition that the heads do not push against the tails but the distance between the two adjacent steel billets is too small, controlling the tapping roller way to stop running; and then, restarting the furnace discharging roller way when the controller detects that the heat detection signal sent by the second heat detector disappears.
2. The method for controlling a billet spacing according to claim 1, wherein the value of a1 is 1.
3. The method for controlling a billet spacing according to claim 1, wherein the value of a2 is 1.
4. The method for controlling a billet spacing according to claim 1, wherein the value of a3 is 1.
5. The method of claim 1, wherein the distance between the first thermal detector and the second thermal detector is 1.2 meters.
6. The method of claim 1, wherein the controller is connected to a run control system of the run out table.
7. The method of claim 1, wherein the controller is a controller in a run-out table run control system.
8. The method of claim 1, wherein the controller is a PLC.
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| CN110548767B (en) * | 2019-09-23 | 2020-10-27 | 陕钢集团汉中钢铁有限责任公司 | Control method for head-tail shearing of rod wire |
| CN111530929A (en) * | 2020-05-14 | 2020-08-14 | 攀钢集团攀枝花钢钒有限公司 | Method for realizing energy saving by automatically starting and stopping four-roller reversible rolling mill |
| CN111906150A (en) * | 2020-07-29 | 2020-11-10 | 盐城市联鑫钢铁有限公司 | Steel rolling rear-end collision prevention early warning method and system |
| CN112934976B (en) * | 2021-01-27 | 2022-04-08 | 盐城市联鑫钢铁有限公司 | Control method for improving billet discharging efficiency of heating furnace |
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