JPH0124214B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is a converter used for blowing copper, nickel mat, etc., in which ventilation obstructions attached to the tuyere can be moved outside the converter along the tuyere. This invention relates to a tuyere punching machine that is equipped with a punching rod on a shaped truck and can automatically punch open the tuyere.

To blow copper or nickel pine, a horizontally long converter with a circular vertical section, called a Pierce-Smith converter, is generally used, and its side walls are equipped with dozens of tuyeres in a row. . Pressure air is blown into the molten material in the furnace from this tuyere to oxidize iron and sulfur, and blowing is performed. Deposits will form and obstruct ventilation. Therefore, in order to remove this deposit, conventionally the tuyere was punched out manually using a tuyere punching rod while air was being blown, but recently various types of punching machines have been used that mechanize this process. Some types of this blowout machine have a blowout rod attached to each tuyere, but there are also types of blowout machines that are equipped with a single blowout rod or multiple blowout rods in parallel along the tuyere. There is a movable tuyere breaker installed outside the converter.

In this tuyere breaker, which is movably installed outside the converter, the
A cart equipped with a tuyere punching machine is placed on the platform, and a worker on the truck visually aligns the tuyere position and the punching rod on the cart, and moves the truck one by one to push the punching rod into the tuyere. It was something that required a great deal of skill.

The applicant has filed a patent application to eliminate these problems and to automatically align the tuyere of a tuyere breaker, which is movably installed outside the converter, without manual operation. No. 54-52383 (Unexamined Japanese Patent Publication No. 1983-
No. 146378) was filed. In this converter tuyere knockout machine, a pulse generator is driven by an electric motor for moving a cart on the tuyere work seat, and the pulse generator is counted for each pitch of movement of the cart for the tuyere. The system allows high-speed operation, low-speed operation, and sudden stops, and detects the amount of movement of the cart by correcting the reference point of movement each time the cart makes a reciprocating movement. In the above system, an AC induction motor was used as the electric motor, and the converter tires were used as the reference point for moving the cart, so the stopping accuracy in positioning was not very good, and corrections were often necessary, and the reference point was also located at the tuyere. Since the tuyere is separated from the edge of the tuyere and the tuyere is not opened when the cart returns,
There were also many problems in terms of work efficiency.

The present invention further improves the above-mentioned Japanese Patent Application No. 54-52383, eliminates the problems, and provides a tuyere puncher which is extremely efficient and has excellent stopping accuracy. An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view schematically showing the converter tuyere breaker of the present invention, in which 1 is a converter body, 2 is a converter tire, and 3 is a receiving roller of the converter. A tire 2 is mounted on the converter furnace body 1, and a converter furnace body 1 is supported so as to be tiltable. 4 are tuyeres, many of which are arranged in parallel at regular intervals on the same level. Reference numeral 5 denotes a tuyere breaker, 6 a work seat, and running wheels 7 provided on a trolley 5a equipped with the tuyere breaker 5 run on a running rail 8 laid on the work seat 6, and the tuyere breaker is 5 is movable along the tuyere 4. Reference numeral 9 denotes a punching rod, one end of which is fitted into a punching head provided in the tuyere puncher 5, so that the punching rod 9 reciprocates inside the tuyere 4 and punches it open by the reciprocating movement of the piston rod in the air cylinder. It's summery. Also trolley 5
A DC servo motor 10 is placed on top a, and this rotation drives a pinion gear 15 via a reducer 11, a chain wheel 12, a roller chain 13, and a chain wheel 14. The trolley 5a meshes with the
can move on the running rail 8. 17 is work seat 6
Thrust rails 18, 18' provided on the platform are thrust rollers attached to shafts protruding downward from the truck 5a, and the truck 5a moves by sandwiching the thrust rails 17, so that the impact at the time of breakthrough can be absorbed. can. On the other hand, a spur gear 19 is installed on the extension of the shaft of the chain wheel 14 and pinion gear 15,
A rotating shaft of a pulse generator 21 is driven through a spur gear 20 that meshes with the gear 19 as the motor 10 rotates.

FIG. 2 is a system diagram of control relations in the punching machine of the present invention. When the previous tuyere opening operation is completed, the sequence controller 22 issues a movement command for the cart 5a to the speed control circuit 24. The amount of movement of the cart 5a and the speed control program during movement are determined in advance by the sequence controller 2 using the numeric key switch 23.
It is set within 2. When opening four tuyeres 4 at a time, for example, as shown in Fig. 3, this setting uses the center of the tuyere at one end as a reference point, and the distance from this to each stopping position is l ₁ , l The number of pulses from the reference point corresponding to ₂ , _l3 , _l4 ... is input as a set value. The speed control circuit 24 that receives the movement command from the sequence controller 22 is connected to the tachometer generator 25 attached to the DC servo motor 10.
While controlling the speed of the DC servo motor 10 while processing the feedback signal from the pulse generator 21, the sequence controller 2
2, the speed control circuit 24 generates high-speed operation;
The low-speed operation and stop commands are sequentially processed, thereby controlling the operation of the DC servo motor 10, and adjusting the position of the truck 5a so that the desired tuyere opening can be performed correctly. In this case, the number of pulses sent from the pulse generator 21 is added by the sequence controller 22 when the cart 5a moves away from the reference point, and subtracted when the cart 5a approaches the reference point, so that the number of pulses sent from the pulse generator 21 is not canceled midway. Even if there is a slight stopping error in the previous stopping position, it will not affect the next stopping position. When the DC servo motor 10 stops, a command to operate the air cylinder 27 is sent from the sequence controller 22 to the solenoid valve 26, and the punching header 2
A breakout rod 9, one end of which is fitted into 8, breaks open the tuyere.

In this way, when the DC servo motor 10 is used as a drive device for moving the cart 5a, highly accurate operation is possible, and the moving speed of the cart 5a can be increased. Moreover, since the moving distance of the trolley 5a is all set using the center of the tuyere at one end as a reference point, the error for each movement is not accumulated, and the stopping position is ensured. Therefore, the tuyere can be punched not only when the cart 5a moves away from the reference point, but also when the cart 5a approaches the reference point after punching the tuyere farthest from the tuyere at the reference point. The tuyeres can be opened extremely efficiently without the need for special corrections or the like during mouth punching.

This tuyere opening machine is normally equipped with four opening rods, and moves the cart 5a for four tuyeres to open up the tuyere, but if the tuyere in the middle is blocked, the tuyere can be opened. In order to prevent the punching rod 9 from entering, skipping operation is required, and by changing the amount of movement set to the sequence controller 22 using the ten key switch 23, the operation pattern can be changed freely. That is, in such a case, the movement of the cart 5a is limited to the tuyere 4.
It is sufficient to move one, two, three, or five tuyeres as needed, not only for the main purpose, but also when moving the cart forward or backward from the reference point. It is also possible to optionally prevent the formation of tuyeres that are not broken out.

In addition, since the punching rod 9 can be easily removed from the punching header 28, it can be removed from the punching header 28 as needed.
The number of tuyere to be opened at each time can be three or two, or the same tuyere can be repeatedly opened in succession.

In the device of the present invention, when it is difficult to break through the tuyere by normal operation, that is, when the air cylinder 27 does not return for a certain period of time after inserting the blowing rod, a signal is sent from the sequence controller 22 to the solenoid valve 26, and the air cylinder 27 is activated. It is also possible to pull out the hammering rod 9 by repeating the reciprocating motion and applying an impact to the hammering rod 9 inside the tuyere and the deposits inside the tuyere. Even if the object inside the mouth is hard and cannot be inserted all the way, the reciprocating movement of the air cylinder 27 can be repeated to ensure complete insertion.

As explained in detail above, according to the present invention, by using a DC servo motor as a drive device for moving the cart, highly accurate operation is possible, and the moving speed of the cart can be increased. Since all distances are determined using the center of the tuyere at one end as a reference point, errors from each movement are not accumulated, and the tuyere can be opened extremely accurately and efficiently.

[Brief explanation of drawings]

Fig. 1 is a schematic side view showing an embodiment of the converter tuyere breaker of the present invention, Fig. 2 is a system diagram showing its control relationship, and Fig. 3 shows a reference point for movement of the tuyere breakator. It is an explanatory diagram. DESCRIPTION OF SYMBOLS 1... Converter furnace body, 4... Tuyere, 5... Tuyere breakout machine, 5a... Truck, 9... Breaking rod, 10... DC servo motor, 15... Pinion gear, 16...
Ratclair, 21...Pulse generator, 22...
Sequence controller, 23... ten key switch, 24... speed control circuit, 25... tachometer generator, 26... solenoid valve, 27... air cylinder, 28... punching header.

Claims (1)

[Claims] 1. A trolley capable of moving on a work seat along a row of tuyeres provided on the furnace wall of a converter for copper or nickel smelting is equipped with a reciprocating breakout rod, and the trolley is moved on the trolley. In a tuyere punching machine, the tuyeres are opened by meshing a pinion driven by a provided electric motor with a rack rail on a work seat, which comprises: a pulse generator driven by a DC servo motor as the electric motor; Count the number of pulses from the pulse generator using the center of the tuyere at one end as a reference point,
The number of pulses during movement after the previous stop of the perforator is added to the total number of pulses up to the last stop, when the perforator moves away from the reference point, and when the perforator approaches the reference point, it is subtracted. , a control means for causing the DC servo motor to perform high-speed operation, low-speed operation, and sudden stop so that the routing machine stops when the total value of the number of pulses reaches a preset value; and after stopping the bogie;
A converter tuyere breaking machine comprising a device for performing a tuyere breaking operation.