JP2015067840A - Method for positioning converter tuyere opening machine for copper smelting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precise method for positioning a converter tuyere opening machine for copper smelting, which causes no error in pulse count values of a counter module even when the tuyere opening machine stops at an overrun position in returning to a predetermined tuyere position located at the outermost edge for initial opening.SOLUTION: The positioning of a tuyere opening machine 5 is performed using a servo motor 10 in the drive system of the tuyere opening machine 5, and a counter module for operation signals of a dolly 6 movable along a plurality of tuyeres 2. The zero point of the counter module is set to outside of a converter away from the tuyere position located at the outermost edge for initial opening, within the moving range of the tuyere opening machine.

Description

  The present invention relates to a positioning technique for a converter tuyere opening machine that automatically blows the tuyere part of a converter used for blowing copper or nickel mats, and more specifically, using a servo motor. The present invention relates to a method for positioning a tuyere opener automatically operated by positioning control with higher accuracy.

  For blowing copper and nickel mats, etc., a horizontal section of a longitudinal section called a Peer-Smith converter (commonly referred to as a “PS converter”, hereinafter simply referred to as a “converter” for convenience of explanation) is generally used. A furnace is used. This converter has a size of about 4 to 6 m in diameter and 10 to 15 m in length from the viewpoint of industrial ease of maintenance such as repair and operation efficiency, and several dozen tuyere are on the side wall. It is provided in a row at intervals. During operation, blown air is blown from the tuyere into the molten material such as a mat in the furnace to oxidize iron and sulfur, and the tuyere is in contact with the molten material due to the cold air sent from the tuyere. A deposit is formed at the inner end of the tube to inhibit ventilation. Therefore, in order to remove this deposit, in the old days, it was manually opened using a tuyere breaker rod during blowing, but recently various tuyere breakers that mechanized this have been used.

  Some types of tuyere openers have a type of cleaving rod attached to each tuyere, but in addition to this, a cleaving device equipped with a single cleaving rod or a plurality of cleaving rods in parallel is provided outside the converter. There is a tuyere breaker installed movably in the area. In the tuyere breaker provided movably outside the converter, a carriage equipped with a breaker equipped with a plurality of breaker rods in parallel is placed on a rail laid along the converter. While the operator who got on is visually aligning the tuyere position with the detonating rod of the detonator, the work is moved sequentially and the detonating rod is pushed into the tuyere and detonated. It is a work under noise and is a work under noise, and since it is performed almost continuously during the converter operation, full automation is required, and now the tuyere that automates the alignment of the above-mentioned detonator A breaker has been developed (see Patent Document 1 and Patent Document 2).

The tuyere breaker disclosed in Patent Literature 1 and Patent Literature 2 is used to align the tuyere breaker bar and tuyere of the tuyere breaker installed movably outside the converter without manual operation. In addition, a positioning control system that uses a servo motor for the drive motor of the carriage is used, and a pulse generator (pulse generator) linked with the servo motor generates pulses that are transmitted at each rotation angle of the drive motor. The position information is obtained by counting the number of times, and the alignment of the piercing device is automated.
That is, the converter tuyere breaker disclosed in Patent Document 1 counts the number of pulses from a pulse generator interlocked with a servo motor with the tuyere center at one end as a reference point, and the previous tuyere breaker. The number of moving pulses after stopping is added to the total number of pulses at the previous stop when the tuyere is moving away from the reference point, and subtracted when the tuyere is approaching the reference point. The method of positioning the tuyere breaker is used, and the converter tuyere breaker disclosed in Japanese Patent Application Laid-Open No. H10-284707 discloses the number of pulses during movement after the last stop of the carriage. A method is used in which the total value of pulses re-counted by the distance integration counter with the detected portion as a reference point is compared with a preset pulse count value by a comparator while performing a detonation operation.

JP 59-59822 A JP-A-6-212234

However, the converter tuyere opening machine disclosed in Patent Documents 1 and 2 has the following problems.
In the case of a positioning control system that uses a servo motor for the drive motor of the carriage, the alignment of the tuyere opening bar and tuyere of the tuyere opening machine installed movably outside the converter is not manually operated. If an error occurs between the "target stop position" and the "actual stop position" during automatic operation, the tuyere breaker cannot push the breaker bar into the tuyere and push the breaker bar between the tuyere Since it stops in the contact state, it is necessary for the worker to inspect every time the tuyere breaker stops, resulting in a heavy work load. For this reason, in the converter tuyere opening machine disclosed in Patent Documents 1 and 2, as described above, the pulse generated at each rotation angle of the servo motor from the pulse generator interlocked with the servo motor is transmitted by the counter module of the sequencer. The position information is obtained by counting.
Based on this position information, the tuyere breaker performs the tuyere opening work while reciprocating many times on the rail, but the position of the tuyere located at the extreme end (hereinafter, “ When the tuyere breaker returns to the “origin”), the tuyere breaker is located outside the converter from the origin (hereinafter “minus side”) due to various factors such as machine weight and brake capacity. May be overrun) and become a so-called overrun state and shift to the minus side from the origin and stop. However, the counter module that counts pulses transmitted at each rotation angle of the servo motor cannot count values less than 0, so if the tuyere breaker deviates from the origin to the minus side, the counter module count value There is a problem that an error occurs in this, which is one of the causes of a decrease in positioning accuracy.

  The present invention has been made to solve the above-described problems of the conventional tuyere breaker due to the fact that the counter module cannot cope with negative values (values of 0 or less). By using an extremely simple means of changing the setting value of the tuyere, even if the tuyere breaker deviates from the origin to the minus side, it can respond without causing an error in the count value of the counter module, and improve the positioning accuracy of the tuyere breaker It is intended to propose a positioning method for a copper smelting converter tuyer opening machine that can be used.

As a result of various studies on means for solving the above problems, the present inventor sets the zero point of the counter module of the tuyere breaker using the counter module as the operation signal of the tuyere breaker to the minus side from the origin. Thus, the present invention has been devised by discovering that even if the tuyere breaker deviates from the origin to the minus side, it can cope with the count value of the counter module without causing an error.
That is, the positioning method of the copper smelting converter tuyere opening machine according to the present invention uses a servo motor as a driving method of the tuyere opening machine, and counters the operation signal of the carriage movable along the plurality of tuyere. The zero point of the counter module is within the moving range of the tuyere breaker and is outside the converter from the end of the tuyere that is the origin, that is, minus the origin. It is characterized by being set to.
Further, according to the present invention, in the above positioning method, the distance between the outermost tuyere position that is the origin and the zero point that is set outside the converter (minus side from the origin) from the outermost tuyere position is W When the distance between tuyere provided in the converter (tuyere interval) is d, it is preferable to set W to a value not more than 0.5 times d (excluding 0). It is.

  According to the positioning method of the converter tuyere breaker of the present invention, the zero point of the counter module is located within the moving range of the tuyere breaker and outside the converter from the end of the tuyere, which is the origin, that is, the origin. By setting it to the minus side, the counter module will function even if the tuyere breaker moves to the minus side from the endmost tuyere position that is the origin, so it can handle the count value of the counter module without causing an error. The positioning accuracy of the tuyere breaker can be increased. Further, in the present invention, it is only necessary to intentionally shift the zero point of the counter module, and it is not necessary to prepare a new detection means or device, which is advantageous in terms of cost. Furthermore, since the method of the present invention can suppress errors in the automatic operation control system of the tuyere opener, it is not affected by the skill level of the worker and there is no need to arrange a new worker.

It is a schematic plan view which shows the arrangement | positioning relationship between the copper smelting converter of one Example of this invention, and a tuyere opening machine. It is a side view which shows the outline of a tuyere opening machine shown in FIG. It is explanatory drawing which shows the positioning method of the same tuyere opening machine of this invention.

  1 and 2, the copper smelting converter targeted by the present invention has a number of tuyere 2 arranged in parallel at regular intervals on the side wall of the furnace body 1, and is placed on the receiving roller 3. A furnace body 1 is supported via a furnace tire 4 so as to be tiltable. A tuyere breaker 5 includes a plurality (usually four) of detonation rods 8 and their fluid pressure cylinders on a carriage 6 placed on a traveling rail 7 laid along the side wall of the furnace body 1. A detonation device provided with (air cylinder or the like) 9 is installed, and the detonation rod 8 is reciprocated in the tuyere 2 by the reciprocating motion of the fluid pressure cylinder 9 to be detonated. The carriage 6 can move on the traveling rail 7 via the speed reducer 11, the chain wheel 12, the pinion gear 13 and the rack rail 14 by a servo motor 10 placed on the carriage. The carriage 6 is provided with a pulse generator 16 via a gear 15 on the extension of the chain wheel 12 and the pinion gear 13, and the rotation axis of the pulse generator is rotated along with the rotation of the servo motor 10. It is said to be a mechanism to drive.

Next, the breaking operation by the converter tuyere opening machine will be described. In the case of a tuyere opening machine having four breaking rods 8 as shown in the drawing, the destination truck 6 is moved by moving the tuyere 6 for four tuyere. The opening is opened, and the moving amount and moving speed of the carriage 6 at that time are performed based on a preset control program. The control program is set so that when four tuyere 2 are opened at a time, the tuyere center at one end is set as the origin (reference point) of the counter module as shown in FIG. The number of pulses from the reference point corresponding to the distances l ₁ , l ₂ , l ₃ , l ₄ , l ₅ ... Is input as a set value, and the operation of the servo motor 10 is performed by the speed control circuit based on the set value. Control is performed. That is, position information is obtained by counting pulses transmitted at each rotation angle of the servo motor from a pulse generator (not shown) linked to the servo motor 10 by a counter module of the sequencer, and based on this position information, The opening operation of the tuyere 2 is performed while the carriage 6 reciprocates many times on the traveling rail 7.

  However, when the zero point of the counter module is set to the center (origin) of the tuyere 2 that is located at the end most first to be opened as in the prior art, when the tuyere breaker, that is, the carriage 6 returns to the position, When various factors such as machine weight and brake capacity are involved, the carriage 6 goes to the minus side of the origin and goes into a so-called overrun state. Since the counter module that counts pulses transmitted at every 10 rotation angles cannot count a value less than or equal to 0, an error occurs in the count value of the counter module. That is, as a function of the counter module, since it can be counted only within a range of values from 0 to +4294967295, an error occurs due to cancellation of a measured value, and the breakage is hindered. As a countermeasure against this, the present invention enables the counter module to count from the origin to the minus side in a pseudo manner by intentionally shifting the zero point of the counter module to the minus side.

That is, according to the positioning method of the converter tuyere opening machine of the present invention, the side where many tuyere 2 are juxtaposed from the center (origin) of the tuyere 2 located at the extreme end to be opened first is the plus side. When the opposite side (outside of the furnace body 1) is set to the minus side, the zero point is set in the range in which the tuyere breaker moves and on the minus side from the origin. In this way, if the zero point of the counter module is set to the minus side, the counter module does not recognize a minus value even if the carriage 6 of the tuyere opening machine is shifted from the origin to the minus side and stops. No error will occur.
Further, in the positioning method of the converter tuyere breaker according to the present invention, the maximum value that moves to the minus side is appropriately selected as the zero point position of the counter module depending on the speed and braking performance of the converter tuyere breaker. Industrially, the distance between the endmost tuyere position that is the origin and the zero point set outside the converter from the endmost tuyere position is W, and the wings provided in the converter When the distance between the mouths is d, it is preferable to set W to a value 0.5 or less (not including 0) of d. That is, when the position of the zero point of the counter module is 0, the lower limit value cannot be set to 0 because it becomes the center (origin) of the tuyere 2 located at the extreme end that is first opened as described above. Therefore, the lower limit value of W is set to a value not more than 0.5 times d (not including 0), and on the other hand, the tuyere breaker overruns to a distance exceeding 0.5 times the distance d between tuyere. In this case, since another maintenance work such as inspection of the pinion gear 13 and cleaning of the traveling rail 7 is necessary, it is detected by monitoring from the maintenance side, and the value is larger than this. This is because the effect obtained by the present invention is the same even if it is set. Rather, if the distance is set to a value larger than 0.5 times, when the above maintenance work is required, errors will not occur in the counter module of the tuyere breaker, and errors such as the tuyere breaker stop will disappear. There is a possibility of delay in noticing that maintenance work is necessary.
Therefore, the distance W between the position of the zero point of the counter module, that is, the outermost tuyere position which is the origin, and the zero point set outside the converter from the outermost tuyere position is the distance between the tuyere It is preferable to set the value to 0.5 times or less (not including 0) of d. At that time, the interval between the tuyere (distance between the tuyere) is generally equal, and if the converter is the same, the distance between the tuyere is the same, but the value of the distance between the tuyere is d. If they are different, for example, a mode value or an average value may be used.

  In the present invention, when the position of the zero point of the counter module is set to a value not more than 0.5 times (not including 0) the distance between the tuyere as described above, the carriage 6 of the tuyere breaker 6 The moving speed (the value obtained by dividing the moving distance of the tuyere opener during tuyere opening by the tuyere opening work time) is not particularly limited, but is preferably 15 to 150 mm / sec. That is, when the moving speed is less than 15 mm, it becomes difficult to perform the tuyere opening at a necessary speed in an operation where the amount of the molten material received in the converter is, for example, 100 t to 300 t, while the moving speed exceeds 150 mm When the tuyere breaker stops, the overrun distance increases, so the distance W between the origin and the zero point set on the negative side is 0.5 times or less of the tuyere distance d (0 This is because it is difficult to control the tuyere opener industrially, for example, the frequency of positional deviation of the tuyere opener increases.

DESCRIPTION OF SYMBOLS 1 Furnace 2 Tail 3 Receiving roller 4 Converter tire 5 Tail opening machine 6 Carriage 7 Rail for traveling 8 Opening bar 9 Fluid pressure cylinder 10 Servo motor 11 Reducer 12 Chain wheel 13 Pinion gear 14 Rack rail 15 Gear 16 Pulse Generator

Claims (2)

  In the positioning method of a tuyere opener using a servo motor as a driving method of the tuyere opener and using a counter module for a driving signal of a carriage movable along a plurality of tuyere, the zero point of the counter module is A positioning method for a copper smelting furnace tuyere opener within a moving range of the tuyere opener and set outside the converter from the endmost tuyere position as the origin.   When the distance between the endmost tuyere position which is the origin and the zero point set outside the converter from the endmost tuyere position is W, and the distance between tuyere provided in the converter is d, 2. The positioning method for a copper smelting converter tuyere opening machine according to claim 1, wherein W is set to a value not more than 0.5 times d (not including 0).

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