JPH0617109A - Oxygen-opening device for iron tapping hole in blast furnace - Google Patents

Abstract

PURPOSE:To efficiently melt a metal rod, to shorten hole opening time, to eliminate the need for a worker for centering, to reduce the man-hour and to realize a low cost by providing a mechanism for finely adjusting the deviation of the centering between an oxygen blowing pipe and an iron tapping hole which is different at each time and correcting this adjustment with a remote operation at every time of opening the iron tapping hole. CONSTITUTION:A hydraulic cylinder 26 served also as the change of inclination is interposed between an oxygen blowing pipe supplying device 7 for freely drawing out and taking up an oxygen blowing pipe 1 by using a winding drum 3, pinch roll device 4 and a corrective device 5 as a vertical fine adjusting device 10 and a hang-holding device 8. A hydraulic cylinder 33 for being changable length of a link arm as the horizontal fine adjusting device 11 is interposed in the link arm 17 disposed for the link constitution to a swing arm 16 for which a horizontal holding girder 9 for horizontally travelling the hang-holding device 8 is held and horizontally swung. Respective controllers 12, 13 are operated by the remote operating transmitters-receipressers 15, 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxygen perforating apparatus used for tap hole opening of a blast furnace in the steel industry.

[0002]

2. Description of the Related Art When a taphole of a blast furnace is opened by using an oxygen blower pipe, an oxygen blower pipe feeding device of a type in which the oxygen blower pipe is straight pipe-shaped by a pinch roll device and a straightening roll device and is freely fed is used. Japanese Unexamined Patent Publication (Kokai) No. 60-135508 discloses a blast furnace taphole oxygen opening device for suspending this oxygen blower tube supply device by a swing arm and advancing and retracting in the taphole direction. According to this blast furnace taphole oxygen hole opening device, since the transfer between the hole opening position and the standby position of the oxygen blower pipe supplying device is performed via the turning arm having a large turning radius, the processing operation is simple. There is an advantage that the required time is short.

However, in this blast furnace taphole oxygen blower hole opening device, the tilt angle of the oxygen blower pipe fed from the oxygen blower pipe supply device cannot be changed in accordance with the tilt angle of the taphole. Further, while the oxygen blow pipe needs to be fed into the taphole while giving a predetermined pressing force, if a reaction force is generated in the oxygen blowpipe in the taphole for some reason, the oxygen blowpipe will not buckle. The insertion of the oxygen blow tube must be stopped or retracted, but since the advance and retreat of this oxygen blow tube is performed via a large-scale swivel arm, it is difficult to control the depressing force and advance / retreat. was there.

In order to solve such a problem, for example, a blast furnace tap hole oxygen hole opening device described in JP-A-63-192809 has been proposed. In this blast furnace taphole oxygen hole opening device, the oxygen blowing pipe supply device is suspended via a suspension device while maintaining a forward tilted posture, and the suspension device travels horizontally with respect to a horizontal holding girder. By freely suspending and by the lifting device advancing and retreating cylinder interposed between the horizontal holding girder and the lifting device, the oxygen blow pipe supply device can be horizontally moved together with the lifting device. This has an advantage that the pressing force and reaction force of the oxygen blow tube can be easily controlled.

Incidentally, in addition to the above publications, for example
Also in 2-132148 and 63-123653, the oxygen blow pipe fed from the oxygen blow pipe supply device is guided by a guide pipe (guide) that is placed so as to project from the device in the taphole direction. By bringing the guide body close to the taphole, the tip position of the oxygen blower tube can be corrected to the taphole as much as possible.

[0006]

However, in the above-mentioned various conventional blast furnace tap hole oxygen hole opening devices, the straightening roll device straightens the oxygen blowing pipe fed from the take-up roll into a straight tube shape, and further, by the guide body. Although the tip position of the oxygen blow pipe is corrected to the tap hole position, the bend and distortion of the oxygen blow pipe will inevitably remain slightly.Therefore, depending on the distance between the tap port and the guide body, The amount of misalignment with the oxygen blow tube changes, and since the direction and magnitude of the bend and strain remaining in the oxygen blow tube are different each time opening work is performed, the direction and amount of this misalignment also fluctuate.

Therefore, it is possible to guide the oxygen blow pipe into the taphole by bringing the guide bodies described in Japanese Utility Model Publication No. 62-132148 and No. 63-123653 close to the taphole. is there. However, even in this case, it is not possible to correct the misalignment of the oxygen blower pipe in the taphole. This means that in order to efficiently dissolve the gold rod originally left in the taphole or previously inserted in the taphole, the core of the oxygen blower tube should be located at the center of the gold rod, that is, the center of the taphole. It is not possible to respond to the need to guide the oxygen blow tube toward the center of the gold rod while considering the deviation, and therefore the melting of the gold rod is also inefficient.

In order to efficiently correct this misalignment,
It is conceivable to automatically move the guide body, for example, in accordance with the direction and amount of bending and distortion of the oxygen blow tube, but for that purpose, the direction and amount of bending and distortion of the oxygen blow tube are automatically set every time. Since it is necessary to install a means for detecting at the tip of the projecting protrusion of the oxygen blow tube and control the direction and position of the guide body according to the detection signal, the device that realizes this is not only expensive and has a complicated configuration. In addition, since the tip of the oxygen blower tube feeder becomes larger and heavier, it is not desirable for the guide body to approach the taphole or for the oxygen blower tube feeder to move back and forth quickly and easily.

Because of the above-mentioned misalignment between the taphole and the oxygen blow pipe, the above misalignment detection / control means suffers from the above-mentioned problems. Therefore, the direction and amount of the misalignment depend on human vision. There is no technique other than recognizing it, and in opening work, the operator often corrects the misalignment between the two in the vicinity of the tap hole. The present invention has been developed in view of these problems, and is provided with a mechanism for finely adjusting the misalignment between the oxygen blow pipe and the tap hole, which is different each time the tap hole is opened. By controlling by operation, the actual misalignment can be corrected, the melting of the gold rod can be made efficient, the opening time can be shortened, the number of man-hours can be reduced by eliminating the operator for centering, and the cost can be reduced. It is an object of the present invention to provide a blast furnace tap hole oxygen hole opening device.

[0010]

A blast furnace taphole oxygen hole opening device of the present invention straightens an oxygen blown tube wound around a winding drum device mounted therein into a straight tube through a pinch roller device and a straightening device. And the oxygen blow pipe supply device for feeding and rewinding in such a manner that the straightened oxygen blow pipe is guided by the guide body so as to advance and retreat in the direction of the tap hole of the blast furnace, and the opening position of the oxygen blow pipe feeder for the tap hole. And a blast furnace taphole oxygen opening device provided with a support device that is movably supported between the standby positions, and the core misalignment between the tip end of the oxygen blowing pipe and the taphole fed from the oxygen blowing pipe supply device, The present invention is characterized by comprising fine adjustment means for finely adjusting each of the guide bodies, and remote operation means capable of controlling fine adjustment of misalignment of the oxygen blower tube by the fine adjustment means by remote operation.

[0011]

In the blast furnace taphole oxygen hole opening device of the present invention, since the core misalignment between the oxygen blow pipe and the taphole by the fine adjustment means can be remotely controlled by the remote control means, the movement control device for the guide body can be used. The gold rod in the taphole can be efficiently melted without need, which shortens the opening time. Moreover, the oxygen blow pipe can be corrected and fed out by the fine adjustment means through the remote operation means in accordance with the direction and amount of the misalignment which is different every time the opening work is performed.
For example, it can be corrected by including an uncertain factor such as thermal deformation of the guide body which is involved in the cause of the misalignment, the operating rate of the blast furnace is improved in combination with the shortening of the opening time, and as in the conventional case. It is not necessary to arrange a worker who corrects the misalignment near the taphole, and it is possible to reduce the overall cost.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows one embodiment of the blast furnace tap hole oxygen venting apparatus of the present invention. In the figure, the oxygen blow pipe 1 pressed and fed to the tap hole A is wound around a winding drum 3 rotatably mounted on a frame base 2 so as to be able to be unwound and unwound. The feeding of the oxygen blow pipe 1 is performed by a pinch roll device 4, and the oxygen blow pipe 1 fed by the pinch roll device 4 is straightened into a straight tube through a straightening device 5 composed of a bending roll 20 and further sandwiched by a pinching roll 2.
It is fed to the tap hole A from 1 through the guide body 6 fixed to the guide rack 22. The straightening device 5 also includes a lateral guide roll (not shown). Further, the winding drum 3 and the pinch roll device 4 are driven by an air motor 23 mounted on the upper surface of the frame mount 2, but a drive chain and a sprocket for transmitting the driving force are omitted in the drawing. There is.

The frame mount 2 and the frame mount 2
An oxygen blower tube supply device 7 composed of a winding drum 3, a pinch roll device 4, a straightening device 5 and the like mounted on a horizontal suspension girder 9 is suspended by a suspension device 8 having a bendable arm 24 so that the inclination angle can be changed. I have it. The inclination angle of the oxygen blow tube supply device 7 including the frame mount 2 is changed between the frame 25 and the frame mount 2 of the suspension device 8 and, as a result, the guide body is indicated by a phantom line in FIG. 1a. A vertical fine adjustment device 10 for finely adjusting the tip position of the oxygen blow pipe 1 fed from 6 in the vertical direction is interposed.

The vertical fine adjustment device 10 of this embodiment is composed of a hydraulic cylinder 26 rotatably interposed between the frame of the suspension device 8 and the frame mount 2. Due to the expansion and contraction, the tip end position of the oxygen blower tube 1 is rotated in the vertical direction on the same vertical plane about the connection point of the bendable arm 24. The expansion / contraction amount of the piston rod of the vertical fine adjustment hydraulic cylinder 26 is controlled by the vertical fine adjustment control device 12 described later.

On the other hand, the suspension device 8 is supported by the horizontal holding girder 9 via traveling wheels 27 so as to be capable of reciprocating traveling in the travel permitting direction of the girder, that is, in the horizontal direction toward the tap hole A. The extension / retraction air cylinder 29 of the suspension device interposed between the frame 25 of the suspension device 8 and the frame 28 of the horizontal holding girder 9 expands / contracts the suspension device 8 and the oxygen blower pipe supply device 7 so that the pig iron The vehicle travels back and forth in the horizontal direction toward the mouth A, that is, is moved back and forth. The lifting device advancing and retracting air cylinder 29 expands and contracts to move the oxygen blowing pipe supply device 7 forwards and backwards through the lifting device 8, whereby the oxygen blowing pipe 1 is moved.
Is pressed at a set pressure toward the taphole A in a state where the hole posture by the vertical fine adjustment hydraulic cylinder 26 for changing the inclination angle is maintained, and a force equal to or larger than the set reaction force is applied to the oxygen blowpipe 1 by the oxygen blowpipe. When the power is transmitted through the supply device 7, the suspension device 8 and the oxygen blowing pipe supply device 7 are immediately retracted to reduce the reaction force of the oxygen blowing pipe 1.

The horizontal holding girder 9 is rotatably suspended by a rotary suspension 34 provided at the tip of the revolving arm 16, and the end of the revolving arm 16 on the frame side is the bearing 3.
The rotary air motor 31 is rotatably installed on the frame structure via the gear 2, and is connected to the turning air motor 31 via the gear transmission mechanism 30. A link arm 17 is installed between the swivel arm 16 and the horizontal holding girder 9, and the horizontal holding girder 9, the oxygen blower tube supply device 7, and the oxygen blower tube 1 are provided in a predetermined manner by the link mechanism action of the link arm 17. While maintaining the orientation, they can be moved in parallel by the rotation of the air motor 31.

In this embodiment, the link arm 1 is
The horizontal holding girder 9 and below oxygen blower tube supply device 7 and a horizontal fine adjustment device 11 for finely adjusting the tip position of the oxygen blower pipe 1 in the horizontal direction are interposed in the frame-side end connection portion of 7. The horizontal fine adjustment device 11 is composed of a hydraulic cylinder 33 that expands and contracts in the axial direction of the link arm 17, and by the expansion and contraction of the horizontal fine adjustment hydraulic cylinder 33, the horizontal holding girder 9 and below the oxygen blower tube 1 of the swing arm 16. The rotary hanger 34 is rotated as shown by an imaginary line in FIG. 1a, whereby the tip end position of the oxygen blow tube 1 is swung on the same horizontal plane. This horizontal fine adjustment hydraulic cylinder 33
The expansion / contraction amount of the piston rod is controlled by a horizontal fine adjustment control device 13, which will be described later.

The horizontal fine adjustment control device 13 and the vertical fine adjustment control device 12 are structurally substantially the same, and, for example, as shown in FIG. 2, a working fluid (liquid) is pressurized through an oil filter 40. A pressure control valve 4 configured to pressurize by a pump 41 and further control it to a predetermined control pressure.
A three-position switching valve 43 is interposed between a supply circuit for supplying liquid from 2 to the hydraulic cylinders 26, 33 and a discharge circuit for discharging liquid from the hydraulic cylinders 26, 33. In the three-position switching valve 43, at the normal position 43a set by the return spring 44, the push-side oil chamber 50 and the return-side oil chamber 51 of the hydraulic cylinders 26 and 33 are closed, whereby the pistons of the hydraulic cylinders 26 and 33 are closed. The rod is held in that position. When a predetermined first control signal is input to the electromagnetic solenoid 45 from this state, the three-position switching valve 43 is switched to the first switching position 43b,
As a result, the control pressure liquid flow is supplied to the push side oil chambers 50 of the hydraulic cylinders 26 and 33, the piston rod advances to the push side, and the liquid in the return side oil chamber 51 is discharged from the discharge circuit as a reaction force thereof. . On the other hand, when a predetermined second control signal is input to the electromagnetic solenoid 45, the three-position switching valve 43
Is switched to the second switching position 43c, whereby the control pressure liquid flow is supplied to the return side oil chamber 51 of the hydraulic cylinders 26 and 33, the piston rod retracts to the return side, and as a reaction force thereof, the pushing side oil chamber The liquid in the chamber 50 is discharged from the discharge circuit. With this configuration, the piston rod advances and retracts in the direction corresponding to the control signal only during the time when each control signal is input, and when the control signal is input, the piston rod is held at the moving position. To be done.

The horizontal fine adjustment control device 13 and the vertical fine adjustment control device 12 are connected to a remote operation receiving device 14, and the remote operation receiving device 14 which receives a remote operation signal from the remote operation transmitting device 15 operates the remote operation receiving device 14. The horizontal control signals and the vertical control signals corresponding to the remote control signals are sent to the horizontal fine adjustment control device 13 and the vertical fine adjustment control device 12, respectively, and these control devices 12, 13 make fine adjustments according to the control signals. The hydraulic cylinders 26 and 33 are controlled.

On the panel of the remote control transmission device 15 (not shown), the amount of misalignment between the tip of the oxygen blow pipe 1 and the tap hole A, more specifically, the gold rod in the tap port A, which is visible to the operator, is shown. There is a two-way manual switch that moves the tip position of the oxygen blower tube 1 horizontally or vertically according to the direction, and the remote operation transmitter 15 sends a movement control signal in the direction in which the manual switch is operated. The electric signal is replaced with a radio wave control signal and transmitted as a remote control signal.

The remote control receiving device 14 receiving the radio wave control signal replaces the remote control signal with an electric control signal again and separates the remote control signal into a horizontal control signal and a vertical control signal. The control signal is sent to the horizontal fine adjustment control device 13, and the vertical control signal is sent to the vertical fine adjustment control device 12. Then, in each of the control devices 12 and 13, as described above, the processing fine adjustment hydraulic cylinders 26 and 33 are driven according to whether the input control signal is the first control signal or the second control signal.

It should be noted that the remote operation signal may be provided with a strength signal corresponding to, for example, an operation amount or an operation speed of the manual switch, or operation pressurization. For example, when the strength signal is large, the pressure control is performed. By increasing the liquid control pressure of the valve and increasing the driving speed of each of the fine adjustment hydraulic cylinders, the shuttle control of the actual tip position of the oxygen blow pipe 1 becomes possible, and conversely, when the strength signal is small, the liquid control is performed. The inching control of the tip position of the oxygen blower pipe 1 may be enabled by lowering the pressure to reduce the driving speed of each of the fine adjustment hydraulic cylinders.

FIG. 3 shows another embodiment of the blast furnace tap hole A oxygen opening device of the present invention, in which an air motor is used for the horizontal fine adjustment device 11 and the vertical fine adjustment device 10.
In this embodiment, the control of the drive system is completely the same except that the supply of the controlled pressure gas by the remote control signal is changed according to the rotation direction of each air motor. In this embodiment, a screw rod 56 is connected to an air motor 55 mounted on the frame 25 of the suspension device 8 as the vertical fine adjustment device 10, and a nut 57 screwed to the screw rod 56 is attached to the oxygen blow pipe. It is configured by being attached to a rotating arm 58 protruding from the frame base 2 of the supply device 7. Thus, for example, when the air motor 55 is rotated in the direction of the arrow ab only while the vertical control signal by the remote operation is input, the screw rod 56 is rotated thereby, and the nut 57 is moved to the position shown in FIG. 3b by the thrust of the screw. The oxygen blowing tube 1 is moved as indicated by a virtual line so that the tip end position of the oxygen blowing tube 1 is on the same vertical plane as the bendable arm 2
It is rotated in the vertical direction about the connection point of 4.

On the other hand, a rotary body 61 which is rotated in synchronism with the rotation of the motor 60 is attached to the air motor 60 provided on the frame side as the horizontal fine adjustment device 11, and the eccentric position of the rotary body 61 is attached. Link arm 17 with fixed length
The end on the frame side of is rotatably attached. Thereby, for example, when the air motor 60 is rotated only while the horizontal control signal by the remote operation is input, the rotating body 61 is rotated in the direction of arrow cd in FIG. 3a, and the rotating body 61 rotates. Along with this, the frame-side end of the link arm 17 is moved as shown by the phantom line in the figure, whereby the tip end position of the oxygen blow pipe 1 is swung on the same horizontal plane.

FIG. 4 shows still another embodiment of the present invention. In this embodiment, in particular, the lifting device advancing / retreating air cylinder 29 is added to the horizontal fine adjustment device 11, and the piston rod of the air cylinder 29 is The movement can be controlled by a control signal from the remote control transmission / reception device, whereby the tip end position of the oxygen blow pipe 1 is horizontal in the same horizontal plane in the direction of the tap hole A as shown by a phantom line in the figure. It is movable.

As described above, according to the present invention, since the tip position of the oxygen blow pipe 1 can be remotely controlled, the core between the tip end of the oxygen blow pipe 1 and the tap hole A, to be precise, the gold rod in the tap hole A. The deviation can be completely corrected by the operator's eyesight, whereby the gold rod can be efficiently melted, the time required for opening a hole can be shortened, and the thermal deformation of each device including the oxygen blow pipe 1 can be appropriately performed. Therefore, it is possible to improve the operating rate of the blast furnace in combination with the shortening of the time required for the opening, and conventionally, the operator who corrects the misalignment in the vicinity of the tap hole A is unnecessary. As a result, the overall cost can be reduced.

The horizontal fine adjustment device 11 and the vertical fine adjustment device 10 are not limited to those described above. For example, the undulation device described in Japanese Utility Model Laid-Open No. 63-123653 described above has a position adjustment function. You may wear it.
Further, the control device of each fine adjustment device is not limited to the above, and in a place where there is no danger of combustion or the like, these control signals may be exchanged by simply exchanging electrical signals.

[0028]

As described above, according to the blast furnace tap hole oxygen perforation apparatus of the present invention, the core misalignment of the feeding tip of the oxygen blower pipe, which is different each time the perforation work is performed, is performed by remote control. Since it is possible to correct it according to the amount and direction of the work, the operator can shorten the time required for drilling work, improve the overall operation rate of the blast furnace, and correct the misalignment near the taphole. This makes it possible to reduce the overall cost by eliminating the requirement.

[Brief description of drawings]

1A and 1B show an embodiment of a blast furnace taphole oxygen opening device of the present invention, wherein FIG. 1A is a schematic plan view and FIG. 1B is a schematic front view.

FIG. 2 is a schematic configuration diagram of a fine adjustment control device used in the blast furnace taphole oxygen opening device of FIG.

3A and 3B show another embodiment of the blast furnace taphole oxygen opening device of the present invention, in which FIG. 3A is a schematic plan view and FIG. 3B is a schematic front view.

FIG. 4 is a schematic front view showing still another embodiment of the blast furnace taphole oxygen opening device of the present invention.

[Explanation of symbols]

 1 is an oxygen blow pipe 2 is a frame mount 3 is a take-up drum 4 is a pinch roll device 5 is a straightening device 6 is a guide body 7 is an oxygen blow pipe supply device 8 is a suspension device 9 is a horizontal holding girder 10 is a vertical fine adjustment device 11 Horizontal fine adjustment device 12 is vertical fine adjustment control device 13 is horizontal fine adjustment control device 14 is remote control receiving device 15 is remote control transmitting device A is tap hole

Claims (1)

[Claims] 1. An oxygen blow tube wound around a winding drum device mounted on the take-up drum device is straightened into a straight tube shape through a pinch roller device and a straightening device, and the straightened oxygen blow pipe is guided by a guide body. Blast furnace provided with an oxygen blower tube supply device that reciprocates forward and backward in the tap hole direction of the blast furnace and a support device that movably supports the oxygen blower tube supply device between the opening position and the standby position of the tap hole In the taphole oxygen opening device, a fine adjustment means for finely adjusting the misalignment between the tip end of the oxygen blowing tube fed from the oxygen blowpipe supply device and the taphole together with the guide body, and the fine adjustment. A blast-furnace taphole oxygen venting device, characterized in that the blast furnace taphole oxygen venting device is provided with remote control means capable of remotely controlling the misalignment of the oxygen blower pipe by the means.