JPH0329308Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an oxygen drilling device used for drilling a taphole in a blast furnace in the steel industry.

[Conventional technology]

As is well known, air drills were often used to drill the tapholes of blast furnaces, but in order to improve productivity by shortening the tapping time and reduce maintenance costs, an oxygen blowpipe was used to drill the tapholes. A device has been developed and put into practical use that melts and burns a closed muzzle at the taphole and a steel rod for opening the hole that has been buried in the closed muzzle in advance by blowing oxygen gas onto the taphole.

For example, in Japanese Patent Application Laid-open No. 60-135508,
As shown in the figure, the oxygen blowpipe 1 is held between a pinch roller device 4 consisting of a holding roller 2 and a drive roller 3, and the oxygen blowpipe 1 is inserted into the tap hole 5 while the pressing force is controlled. ) has been disclosed.

By the way, since the device A uses a long straight oxygen blowing tube, for example, a long oxygen blowing tube measuring 30 to 40 m, the oxygen blowing tube is coiled and the oxygen blowing tube is straightened into a straight tube shape before use. A hole punching device (hereinafter referred to as B device) that feeds the hole in the direction of the pig hole was developed and filed by the applicant of the present application as Utility Model Application No. 119682/1982.

FIG. 7 is a schematic plan view of the B device 6, in which an oxygen blowpipe 1 is attached to the tip of a swing arm 9 which is rotatably operated via a swing drive device 8 fixed to a structure 7 around the blast furnace. An oxygen blowpipe supply device 11 equipped with a winding drum device 10, a pinch roller device, and a straightening device (both not shown) is rotatably suspended.

FIG. 7 shows the hole-drilling operation, and when the hole-drilling operation is completed, the swing arm 9 is driven, and in this example, the swing arm 9 is driven.
Turn it 180 degrees and move it to the standby position.

When opening the hole, the oxygen blowpipe supply device 11
While straightening the oxygen blowpipe 1 into a straight pipe shape, it is continuously fed out and brought into contact with the tap hole 5, and then inserted, and
The wood and/or steel rods filled in the pipe are burned and melted. For convenience of explanation, the explanation of the oxygen gas supply device and the drive device will be omitted.

For the oxygen blowpipe 1 described above, a steel pipe with a relatively small diameter, for example, about 10A (refer to JIS G3452 carbon steel pipes for piping) or a colorized steel pipe obtained by colorizing them is used. The distance between the holes must be at least 3 to 4 m due to equipment or operational constraints, and some kind of guide tool is required to bring the oxygen blowpipe 1 into accurate contact with the tap hole 5. must be established.

Therefore, the device B is provided with a short guide pipe 12 on the exit side of the pinch roller device to guide the oxygen blowpipe toward the tap hole.

[Problem that the invention attempts to solve]

As a result of drilling the blast furnace taphole using the device B, the present inventors discovered that an oxygen blowpipe was inserted into the taphole and an oxygen blowpipe was inserted into the taphole during the melting and combustion process. We have experienced that melting and combustion becomes extremely difficult, and a reaction force other than the pressure applied to the oxygen blowpipe occurs, which often causes the oxygen blowpipe to bend or buckle.

In other words, in order to insert the oxygen blowpipe into the taphole and perform drilling operations, it is necessary to continuously apply a pressing force of 20 to 60 kg to the oxygen blowpipe, and the reaction force causes the oxygen blowpipe to buckle. Control must be performed to reduce the pressing force before it becomes large enough to cause the reaction force to occur, and to increase the pressing force when the reaction force begins to decrease. However, if the reaction force detection and pressing force control are made sensitive, hunting may occur. It was found that there was a problem in that if the accuracy was lowered, the oxygen blowpipe would bend and the hole drilling work would be hindered.

Since the short guide tube in the B device has a low function of preventing bending and buckling of the oxygen blow tube in the above-mentioned control, the present inventors installed a long oxygen blow tube guide fitting on the front of the oxygen blow tube supply device. However, when moving the hole-opening device between the hole-opening position and the standby position, the guide fittings may interfere with other equipment. Problems arose in that they often interfered with each other and jeopardized the safety of workers at the front of the furnace.

The object of the present invention is to provide a hole-opening device that has excellent functions for guiding and suppressing bending of an oxygen blowpipe, does not interfere with other furnace equipment, and has high operational safety.

[Means for solving problems]

In order to achieve the above object, the inventors of the present invention straightened the oxygen blowpipe wound around the winding drum device mounted on the tower into a straight tube shape through a pinch roller device and a straightening device, and paid it out freely in the direction of the tap hole. An oxygen blowpipe supply device to be rewound, and a support that suspends the oxygen blowpipe supply device via a suspension device such that its inclination angle can be changed, and supports the oxygen blowpipe supply device so as to be movable between an opening position and a standby position. A blast furnace taphole oxygen opening device comprising a guide beam in which the oxygen blowpipe supply device can be raised and lowered by a hinge mechanism, a blowpipe guide straight pipe fixed to the tip of the guide beam, and a raising and lowering device for the guide beam. We developed a blast furnace taphole oxygen opening device that is equipped with the following features, solved the problems, and succeeded in achieving our goals.

[Effect]

The blast furnace taphole oxygen hole opening device of the present invention has a mechanism in which an oxygen blowpipe is wound around a winding drum device and is freely advanced and retracted to be paid out and unwound, and furthermore, the oxygen blowpipe is equipped with a blowpipe guide straight pipe. The guide beam guides the tap so that it contacts the tap hole accurately.
It is possible to pay out and unwind the oxygen blowpipe extremely smoothly and quickly, and it is also possible to eliminate or reduce bending and buckling to a near zero level.

In addition, since the guide beam is operated to be able to rise and fall freely through the lifting device, there is no interference with other equipment during movement, and there is no problem with the safety of workers at the front of the furnace.

Furthermore, if a long guide beam is required due to equipment problems, the guide beam can be moved forward and backward via a support device that allows it to move forward and backward, making it possible to handle the situation sufficiently. There is no risk of any interference.

[Embodiment 1] FIG. 1 shows a schematic side view of a blast furnace taphole oxygen opening device (hereinafter simply referred to as the hole opening device) 13 according to the present invention. In the figure, a horizontal holding girder 14 is rotatably suspended from the tip of the swing arm 9 via a pivot device 15.

The running beam 16 is movably mounted on the horizontal holding beam 14 via wheels 17a and 17b, and is configured to move back and forth by an air cylinder (not shown).

The traveling beam 16 also includes a suspension arm 18,
Oxygen blowpipe supply device 1 via liftable arm 19
1 can be suspended at any angle of inclination, and the attitude of the oxygen blowpipe 1 can be adjusted so as to bring it into accurate contact with the tap hole 5.

The oxygen blowpipe supply device 11 includes pinch rollers 20a, 20 in addition to the winding drum device 10.
A straightening device 23 consisting of bending rollers 22a to 22c and guide rollers 24 to 26 are mounted on the tower, and the oxygen blowpipe 1 is pulled out from the winding drum device 10 by the pinch roller device 21. After being straightened into a straight tube shape by the straightening device 23, it is fed out through guide rollers 24 and 25 from a guide beam 29, which will be described later, in the direction of the tap hole.

Reference numeral 27 represents a driving motor for the winding drum device 10 and the pinch roller device 21, such as an air motor, and 28 represents a sprocket wheel. For convenience of explanation, power transmission chains, belts, etc., oxygen gas supply devices, air piping, etc. are omitted from illustration.

Next, a blowpipe guide straight pipe 30 is fixed to the tip of the guide beam 29, and the guide beam 29 has a hinge mechanism 31 in a portion close to the oxygen blowpipe supply device 11, and an air tube that is engaged with the hinge mechanism 31. It is equipped with a levitation device 32 consisting of a cylinder.

Now, after drilling the hole in the state shown in Fig. 1, when moving to the standby position, the pinch roller device 21
The oxygen blowpipe 1 is pulled in to the entrance of the oxygen blowpipe supply device 11 as shown in FIG. After making sure that it does not interfere with the equipment (not shown),
The pivot arm 9 is pivoted.

Although it is advantageous to make the combined length of the guide beam 29 and the blowpipe guide straight pipe as long as long as it does not interfere with other operations or equipment, it is not preferable to make it too long from the viewpoint of operation and structural design. .

The present inventors set the length of the blowpipe guide straight pipe 30 to 1500 mm, the length of the guide beam 29 to 1910 mm, and the combined length of the two to 2850 mm in a hole-opening device using an oxygen blowpipe made of a 10A colorized steel pipe. Although good results were obtained, it goes without saying that these should be designed according to the conditions of each facility.

[Embodiment 2] Next, different embodiments of the hole punching device of the present invention will be described with reference to the schematic side view of FIG. 3 and the schematic plan view of FIG. 4. The hole punching device 33 shown in FIGS. 3 and 4 has the same main structure as the hole punching device 13 described above, and those with the same reference numerals have the same functions and effects, so a description thereof will be omitted. , mainly those having different functions and effects will be explained.

A locking fitting 34 is protruded from the tip of the guide beam 29 of the hole punching device 33, and a guide fitting 3 having a pulley 35 is provided at the shoulder of the horizontal holding girder 14.
6 is fixed, and furthermore, a guide pulley 37 is provided protruding approximately at the center of the swing beam 9.

Further, a locking metal fitting 39 is fixed to a suitable structure around the blast furnace, such as a building beam 38, and a tension wire 40 has both ends fixed to the locking metal fittings 34 and 39, and the pulley 35 and the guide pulley 37 are fixed to each other. The locking fittings 34 and 39 are stretched so as not to loosen.

Further, the hole opening device 33 has a link mechanism 41 along the swing arm 9, and the oxygen blowpipe supply device 11
is moved in parallel between the opening position A and the standby position B.

Accordingly, the tension wire 40 puts the guide beam 29 in a downward position, that is, a horizontal position, at the opening position A by the rotation of the swing arm 9, and returns it to the standby position B.
Then, it acts to make you stand up.

In the present invention, the above-mentioned locking fittings 34, 39, pulley 3
5. The guide pulley 37, the tension wire 40, etc. are collectively referred to as the undulating device for the guide beam 29.

This levitation device is operated only by the rotation of the swivel arm 9, and does not require a separate drive device to erect the guide beam 29, so it has the advantage of simplifying the equipment.

Further, regarding the guide beam 29, the fifth
As shown in the schematic side view of the figure, oxygen blowpipe supply device 1
1 is provided with a movable support device 44 consisting of wheel support devices 42a, 42b and an extendable cylinder 43, and is supported so as to be movable back and forth, making it possible to support the device even in locations with little equipment space for movement.

In the figure, 31a indicates a hinge mechanism incorporating a rotation type undulation mechanism.

[Effect of idea]

The hole-opening device of the present invention smoothly guides and holds the oxygen blowpipe, has excellent bending and buckling suppression effects, and has a low equipment failure rate, is highly safe in operation, and has compact equipment. It has extremely high practical value as there are few equipment restrictions.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of the hole-drilling device according to the present invention in a hole-drilling posture, Fig. 2 is a schematic side view of the hole-drilled device when the guide beam is erected, and Fig. 3 is another embodiment of the present invention. FIG. 4 is a schematic side view of the hole opening device, FIG. 4 is a schematic plan view thereof, FIG. 5 is a schematic explanatory diagram of the guide beam movable support device, and FIG. Such a schematic explanatory drawing, FIG. 7, is a schematic plan view of a hole punching device for straightening a coiled oxygen blowpipe. Explanation of symbols, 1...oxygen blowpipe, 2...presser roller,
3... Drive roller, 4... Pinch roller device, 5... Taphole, 6... Hole punching device, 7... Frame, 8... Swivel drive device, 9... Swivel arm, 10... Winding drum device,
11...Oxygen blowpipe supply device, 12...Short pipe for guide,
13... Blast furnace taphole oxygen opening device, 14... Horizontal holding girder, 15... Pivotal support device, 16... Traveling beam, 1
7a, 17b... Rolling wheel, 18... Hanging arm, 19...
Liftable arm, 20a, 20b...pinch roller, 21...pinch roller device, 22a-22c...
Bending roller, 23... Straightening device, 24-2
6...Guide roller, 27...Air motor, 28...
Sprocket wheel, 29...Guide beam, 3
0... Blowpipe guide straight pipe, 31... Hinge mechanism, 32... Raising device, 33... Hole punching device, 34... Locking metal fitting, 35
...Pulley, 36...Guide metal fitting, 37...Guide pulley, 38
... building beam, 39... locking metal fitting, 40... tension wire, 41... link mechanism, 42a, 42b... rolling wheel support device, 43... telescopic cylinder, 44... movable support device.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An oxygen blowpipe wound on a winding drum device mounted on a tower is straightened into a straight tube shape through a pinch roller device and a straightening device, and is fed out and wound in the direction of the tap hole so as to be freely advanced and retracted. an oxygen blowpipe supply device to be returned; and a support device that suspends the oxygen blowpipe supply device via a suspension device so as to be able to change its inclination angle, and supports the oxygen blowpipe supply device so as to be movable between an opening position and a standby position. A blast furnace taphole oxygen opening device consisting of,
A blast furnace taphole oxygen opening device, wherein the oxygen blowpipe supply device includes a guide beam that can be raised and lowered by a hinge mechanism, a blowpipe guide straight pipe fixed to the tip of the guide beam, and a raising and lowering device for the guide beam. (2) The blast furnace taphole oxygen opening device according to claim 1, wherein the guide beam is supported so as to be movable back and forth via a support device that can move back and forth.