JP4686941B2 - Hot metal ladle cart transport line and transport control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to conveyance control of a hot metal ladle cart that conveys a hot metal ladle.
[0002]
[Prior art]
In a steelmaking factory, a hot metal ladle is used for supplying hot metal to a converter or the like.
As a method of receiving hot metal with the hot metal ladle, a bogie transport line system is adopted in which the hot metal hot pot is placed on the carriage and conveyed to the receiving position, and the topped car is tilted to pour the molten iron. No. 62-32994, Japanese Utility Model Publication No. 60-11087, etc.). Note that the hot metal ladle carriage on which the hot metal ladle is placed has a function of measuring the weight of the hot metal received, and is also called a weighing bogie. Here, the hot metal ladle cart is also called a weighing cart or simply a cart.
[0003]
First, FIG. 2 is a partial cross-sectional view showing the receiving of the hot metal 21 at the receiving position. Here, 20 indicates a hot metal flow poured from the topped car 12 into the hot metal ladle 1. At the receiving position, the hot metal ladle 1 on the carriage 2 is covered with a dust collection hood 13.
Next, based on FIG. 3, the conveyance line of the conventional hot metal ladle cart for hot metal supply to the hot metal ladle will be described.
[0004]
The hot metal ladle 1 is usually suspended and mounted on a carriage 2 located below the conveying line of the topped car 12 in order to receive the hot metal from the topped car 12. Reference numeral 15 denotes a side wall.
In the suspension to the carriage 2, it is necessary to accurately align both the hot metal ladle 1 and the carriage 2, but a slight positional deviation (error) is inevitable. Therefore, it is necessary to correct this positional shift by performing stop position control of the carriage 2 at the receiving position.
[0005]
Specifically, a limit switch 16 is provided on the transport line of the carriage 2 in front of the receiving position, and the carriage is decelerated when the limit switch 16 is operated, so that the vehicle travels at a low speed. In addition, a laser master 17 is provided at a position where the hot metal ladle 1 blocks the laser at the receiving position, and the carriage is stopped when the laser master 17 is shielded from light. In this way, the cart can be stopped at the receiving position with high accuracy regardless of the positional shift of the hot metal ladle 1 on the cart 2.
[0006]
Here, as the limit switch 16, an overflow sensor type proximity switch, a striker type contact switch, or the like is used, and the laser master 17 includes a projector that projects a laser and a receiver that receives the laser. A sensor configured to detect passage of light by detecting that the laser light reception has been blocked has been used.
The traveling control of the carriage is performed by the carriage traveling control controller 9. The bogie speed reduction / stop command and the like for the bogie running control controller 9 are performed by taking in the signals from the limit switch 16 and the laser master 17.
[0007]
[Problems to be solved by the invention]
However, in the conventional carriage transport line, it is necessary to dispose sensors such as limit switch 16 and laser master 17 in the vicinity of the receiving position, and the problem is that scattered hot metal, so-called bare metal adheres and malfunctions. was there. Therefore, bullion removal by stopping the line was an operation that could not be done. In the worst case, the sensor is broken, and there are many troubles that the line must be stopped.
[0008]
The present invention solves the above-mentioned problems, eliminates the need for installing sensors in the vicinity of the receiving line, and realizes essential maintenance-free operation, thereby realizing stable operation and improved reliability of the hot metal ladle transport line. For the purpose.
[0009]
[Means for Solving the Problems]
The present invention comprises a hot metal ladle, a hot metal ladle carriage that places the hot ladle ladle and conveys it to a receiving position, a position detector that detects a placement position shift of the hot ladle ladle on the hot ladle pan carriage, The travel distance detector for detecting the travel distance of the hot metal ladle cart, the travel distance information detected by the travel distance detector, and the mounting position shift information detected by the position detector are input, and the mounting position shift is detected. The above-mentioned problem has been solved by a hot metal ladle carriage transport line that includes a conveyance control device that includes a function of correcting and issuing a receiving position stop command to the hot metal ladle carriage.
[0010]
The present invention also includes a step of placing the hot metal ladle on the hot metal ladle cart, a step of detecting a placement position shift of the hot ladle ladle placed on the hot metal ladle cart, and a travel distance of the hot metal ladle cart. From the detecting step, the travel distance information, and the placement position deviation information of the hot metal ladle on the hot metal pan carriage, the placement position deviation is corrected and the hot metal pan carriage is stopped at the receiving position. A process for issuing a command, and correcting a misalignment position of the hot metal ladle on the hot metal ladle carriage to stop the hot metal ladle truck at the receiving position. Solved the above problem.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of the present invention will be described with reference to FIG. The same members already described in FIGS. 2 and 3 are denoted by the same reference numerals, and description thereof is omitted here.
The present invention is characterized in that a position detector 3 for detecting the mounting position of the hot metal ladle is disposed in the vicinity of the lifting / hanging position of the hot metal ladle 1.
[0012]
For example, the position detector 3 is provided with a deck 11 in the vicinity of the line and is attached in the vicinity of the deck 11 to facilitate maintenance. As long as the position detector 3 can measure the placement position of the hot metal ladle 1 on the carriage 2, the installation location, the measurement method, and the like are not particularly limited. For example, the position detector 3 measures the distance to the target with ultrasonic waves. It is preferable to employ a non-contact measurement method such as an ultrasonic sensor or a laser distance meter using a laser. Below, the example which employ | adopted the ultrasonic sensor as the position detector 3 is demonstrated concretely.
[0013]
In the hot metal ladle trolley transfer line to which the present invention is applied, the trolley travel control controller 9 performs high-precision trolley travel control, and the stop position of the trolley itself can be controlled very accurately. In the present invention, based on the high-accuracy cart transport control, the above-described misalignment position of the hot metal ladle 1 on the cart 2 is corrected, thereby further improving the reliability and stable operation of the hot metal pan cart transport line. It was realized.
[0014]
That is, when the hot metal ladle 1 is placed on the carriage 2 stopped at the lifting / hanging position, the placement position deviation is measured by the ultrasonic sensor 3, and the carriage traveling control is performed based on the position deviation information. Correction was made and the position of the hot metal ladle 1 at the receiving position was eliminated by correcting the carriage stop position at the receiving position.
Below, the hot metal ladle trolley | bogie conveyance control method of this invention is demonstrated in detail for every process. In addition, an application line is a hot metal ladle conveyance line shown in FIG.
[0015]
In this line, the conveyance control device 7 controls the conveyance of the carriage 2. The transport control device 7 includes a sequencer 8, a dolly travel control controller 9, and GP10, and is controlled based on sequence control programmed in advance in the sequencer 8. Here, the description of the details of the control not directly related to the present invention in the travel control by the cart travel control controller 9, the sequence control by the sequencer 8, and the like is omitted. The GP 10 is a graphic panel that performs program setting for the sequencer, display of the control status, and the like.
(1) The process of placing the hot metal ladle on the hot metal ladle cart The empty hot ladle 1 is suspended and placed on the hot metal ladle cart 2 at the stop position of the hot metal ladle transport line. At this time, as described above, the position shift of the hot metal ladle 1 is caused. In addition, hot metal does not scatter at this hot metal pan hanging position.
(2) A process of detecting the displacement position of the hot metal ladle placed on the hot metal ladle cart An ultrasonic sensor 3 which is a position detector for detecting the displacement position of the hot metal ladle 1 is installed in the vicinity of the deck 11. Then, by measuring the distance with the ultrasonic wave 4, the placement position shift of the hot metal ladle 1 is detected. This measurement data (mounting position deviation information) is taken into the sequencer 8 via the ultrasonic sensor amplifier 5.
[0016]
Here, a shutter (not shown) is attached to the ultrasonic sensor 3 as a measure against radiant heat from dust and hot metal ladle, and the shutter is automatically opened only during measurement. For the purpose of preventing dust from entering the ultrasonic sensor 3 and cooling the internal equipment, it is preferable to air purge the inside of the sensor.
(3) Step of detecting the traveling distance of the hot metal pan cart In accordance with the step (2) above, the current position of the stopped cart is measured by the travel distance detector 6 provided in the hot metal pan cart 2, and the data is used as a sequencer. 8
[0017]
Further, after completion of the measurement in (2) above, the carriage 2 starts automatic traveling toward the receiving position based on the conveyance sequence process. The current traveling position is always taken into the sequencer 8.
(4) Sending a stop command at the receiving position to the hot metal ladle cart The travel distance information of the cart 2 collected in the process step (3) and the placement of the hot metal ladle 1 on the cart 2 collected in the step (2) From the position deviation information, the placement position deviation of the hot metal ladle 1 on the carriage 2 is corrected to calculate the exact stop position of the carriage 2, and an appropriate deceleration command is sent from the sequencer 8 to the carriage travel control controller 9. By issuing a stop command, the carriage 2 is decelerated and stopped.
[0018]
Through the above steps, the carriage 2 can be accurately stopped so that the hot metal ladle 1 on the carriage 2 comes to the receiving position.
In addition, the sequencer 8 constantly monitors status signals such as the normality of the ultrasonic sensor 3, the mileage detector 6 and the like, the normal measurement, the normal trolley automatic operation, the control system normal, etc., and confirms that these conditions are complete. Needless to say, control is executed after confirmation.
[0019]
When an abnormality occurs in these statuses, an abnormality alarm is displayed on the GP10 screen, and the carriage is stopped.
Through the steps described above, it is possible to accurately position the ladle 1 at the hot metal receiving position from the topped car 12 and stop the carriage 2.
After receiving the hot metal at the receiving position, the carriage 2 is lifted / returned to the hanging position, the receiving pot 1 is lifted and carried out to the next process.
[0020]
【The invention's effect】
According to the present invention, the sensor arrangement in the vicinity of the receiving position is not required, the adhesion of the metal to the sensor can be essentially eliminated, and the stable operation and the improvement of the reliability of the carriage transport line can be realized.
[Brief description of the drawings]
FIG. 1 is a schematic diagram for explaining conveyance control of a hot metal ladle cart according to the present invention.
FIG. 2 is a partial cross-sectional view schematically showing how hot metal is poured from a topped car into a hot metal ladle.
FIG. 3 is a schematic diagram illustrating conveyance control of a conventional hot metal ladle cart.
[Explanation of symbols]
1 Hot metal ladle 2 Hot metal ladle cart (weighing cart)
3 Ultrasonic sensor (position detector)
4 Ultrasonic 5 Ultrasonic Sensor Amplifier 6 Travel Distance Detector 7 Transport Control Device 8 Sequencer 9 Dolly Travel Controller
10 GP (display / operator)
11 decks
12 Topy Car
13 Dust collection hood
15 Side wall
16 Limit switch
17 Laser master
20 Hot metal flow
21 Hot metal

Claims (2)

Hot metal hot pot,
A hot metal ladle carriage for placing the hot metal ladle and transporting it to a receiving position;
A position detector for detecting a mounting position shift of the hot metal ladle on the hot metal ladle cart;
A mileage detector for detecting the mileage of the hot metal pan trolley;
The travel distance information detected by the travel distance detector and the placement position deviation information detected by the position detector are input, and the placement position deviation is corrected and a receiving position stop command is issued to the hot metal ladle cart. A transport control device containing the function;
A hot metal ladle carriage transport line characterized by comprising: Placing the hot metal pan on the hot metal pan cart;
Detecting the placement position shift of the hot metal ladle placed on the hot metal ladle cart;
Detecting the travel distance of the hot metal pan trolley;
A step of issuing a stop command at the receiving position to the hot metal ladle trolley by correcting the mounting position deviation from the travel distance information and the mounting misalignment information of the hot metal ladle on the hot ladle trolley; ,
Have
A hot metal ladle cart transport control method, wherein the hot metal ladle cart is corrected to a mounting position shift on the hot metal ladle cart, and the hot metal ladle cart is stopped at the receiving position.

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