JPH0216981Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a device for opening a tap hole in a blast furnace used in a pig iron production facility.

(Prior Art) Drilling a taphole in a blast furnace is a major operation in blast furnace operation, and improving its efficiency has an important impact on productivity, so various hole-opening devices have been developed and adopted.

For example, Japanese Patent Application Laid-Open No. 53-54103 discloses a means for opening a hole by irradiating a laser on a plugged taphole, and Japanese Patent Application Laid-Open No. 58-39711 discloses
Immediately after the taphole is closed by the matud, with only the vicinity of the inner end surface of the matud having been fired, the matudo gun is removed, and the taphole opening machine inserts a round steel bar into the matudo to open the taphole. A method is shown in which the machine is evacuated and only the round steel bar is left in the mound, and after the mound is fired and hardened, the round steel bar is pulled out and a tap hole is opened when necessary.

Furthermore, in Japanese Patent Publication No. 58-189311, in a method of opening the tap hole by irradiating a laser to the plugged mat of the blast furnace taphole, when closing the taphole after the completion of tapping of the blast furnace, the blockage refractory A material that is easily vaporized by combustion is filled in advance in the material, and the next time the iron is tapped, the blocked taphole is irradiated with a laser and auxiliary gas for combustion of the easily vaporized material is simultaneously injected. , discloses means for smoothly opening the blocked tap hole by combusting and vaporizing the easily vaporized substance within the tap hole.

In addition, the inventors of the present invention previously invented and filed an application for a taphole opening machine shown in Fig. 6.

The main feature of this hole drilling machine is to use an oxygen blowpipe drawing device 5 that faces the tap hole 2 of the blast furnace 1 and holds a straight oxygen blowpipe 4 so as to be freely drawn out.
Reference numeral 6 denotes an oxygen blowpipe gripping roller rotatably driven by a driving motor such as an air motor 6a;
is a rod that is rotatably suspended from the rotating arm 8 and is engaged with the oxygen blowpipe delivery device 5. The swing arm 8 is mounted on a bearing device 10 fixed to a frame 9, and is driven by a rotating motor such as an air motor 11.
The oxygen blowpipe 4 is positioned so as to directly face the tap hole 2.

Therefore, the steel rod 3 and plugging material 3 remained in the taphole or were buried in advance.
A is sprayed with oxygen gas from the oxygen blowpipe 4 (oxygen gas is supplied from an oxygen gas supply main pipe connected to the oxygen lance 4 via a flexible hose, but not shown). and occlusion material 3
The hole is opened while burning and melting the oxygen blowpipe 4.

Furthermore, the inventors of the present invention have developed an improved method for opening holes shown in FIG. 6, in which a colorized steel tube that has been previously wound into a coil is straightened and brought into contact with the taphole, and oxygen gas is sprayed to open the holes. A method for opening a blast furnace taphole has been developed and previously filed, and the method is shown in FIG.

In the figure, the same reference numerals as in FIG. 6 are the same members, and their explanation will be omitted.

Reference numeral 13 is an elevating device which is rotatably engaged with the rod 7 and has an elevating cylinder 12, and suspends an oxygen blowpipe straightening and feeding device 14 so as to be able to move up and down.

The oxygen blowing tube straightening and feeding device 14 is a roller bending type straightening device that includes a winding drum 15 around which an oxygen blowing tube 4a made of, for example, a colorized steel pipe is wound, and a roller bending type straightening device that pulls out and straightens the wound oxygen blowing tube 4a while feeding it out. 16, and functions to bring the oxygen blowpipe 4a into contact with the taphole 2. 1
7 is an oxygen gas supply device, and flexible hose 1
8, oxygen gas is supplied to the oxygen blowpipe 4a wound around the winding drum 15.

In this device, since the absolute length of the oxygen blowing pipe 4a can be made longer than that of the straight oxygen blowing pipe 4, it has the ability to handle many hole drilling operations and is also advantageous in terms of labor saving.

(Problems to be solved by the invention) Conventional hole-opening means, including the invention described in Japanese Patent Application Laid-open No. 53-54103 mentioned above, all require high equipment costs and require advanced technology to operate. However, there are still issues that remain, including the fact that it is difficult to expect labor savings. Furthermore, the hole-opening means explained in FIGS. 6 and 7 is extremely efficient and safe.
The device shown in the figure is functionally superior to the device shown in FIG. 6 in that it can perform hole drilling operations many times without replacing the oxygen blowpipe. There is a problem in that the operator has to grasp and guide the iron by hand until it comes into contact with the tap hole 2. In other words, a distance of about 3 to 5 meters from the device 14 to the taphole is required for safety.
Since the hole-opening device cannot be brought closer than that, there remains the problem that manual labor is essential to ensure that the oxygen blowpipe 4a contacts the taphole.

Therefore, in order to automate the hole-drilling operation using the hole-drilling device and improve safety, it was necessary to devise an automatic blow-out tube 4a and a mechanized blow-pipe guiding device.

(Means for Solving the Problems) Therefore, as a result of research into means for solving the above-mentioned problems, the inventors of the present invention and others have found that a drive device is In a blast furnace taphole opening device, which comprises a swing arm that is rotatably operated through the swing arm, and an oxygen blow tube straightening and feeding device suspended from the tip of the swing arm via a lifting device, the oxygen blow tube straightening and feeding device is a winding drum on which the device is rotatably supported via a bearing device and having an oxygen blowpipe wound in a coil; a roller device that guides the oxygen blowpipe so as to be freely drawn out and pulled back from the winding drum; A roller bending device for straightening the bending of the oxygen blowing pipe, a drive device for the winding drum, the roller device, the roller bending device, a frame on which they are mounted, and a straightening and feeding device fixed to the frame and for straightening the oxygen blowing pipe. A blowing pipe guide device comprising a support fitting that supports an oxygen blowpipe that is fed out from the blast furnace so as to be inserted freely, and a blowpipe guide device that holds the support fitting and further guides the support fitting in the direction of the tap hole so as to move forward and backward. We have developed a pigtail opening device and achieved improved work safety and automation.

(Function) The details of the function and structure of the present invention will be explained below.

FIG. 2 is a schematic side view of the oxygen blowpipe straightening and feeding device 19 according to the present invention, in which a rectangular frame 20
A support frame 21 is fixed to the winding drum 23 via a bearing 22.
An oxygen blowing pipe 24 made of a steel pipe or a colorized steel pipe is wound around the winding drum 23 so as to be freely wound or unwound. The winding drum 23 has gears 25, 2 indicated by broken lines.
It is operated in forward and reverse directions by pinions 6 and 27. The gear 27 is driven by an air motor 60 (indicated by a broken line) via a chain drive device (not shown).

Reference numeral 28 denotes a bearing that rotatably supports a horizontally rotating guide roller 29, and the oxygen blowpipe 24 is always guided by the horizontally rotating guide roller 29 so as to match the pass line of the pinch roller and roller bending device described later. Ru.

Next, in the housing 30, an upper pinch roller 31 and a lower pinch roller 32 engaged with a drive gear (not shown) which is chain-driven by the air motor 60 are rotatably mounted on a shaft via a bearing 33 having a presser spring device. supported.

Next to the housing 30, bending rollers 34 and 35 are supported by bearings 36 and 37, and upper bending rollers 38 and 41 are supported by vertically adjustable bearings 39 and 43, The bending of the oxygen blowpipe 24 is corrected by the bending rollers 34, 35, 38, and 41.

Next, 42 is a guide roller, and the bending rolls 38, 41 and guide roller 42 are supported by a support frame 40, and the bearings 36, 37 are connected to a jacking device (not shown) built in the frame 20. It is supported so that it can be moved up and down.

In the present invention, the horizontal rotation guide roller 29, the bearing 28, the upper and lower pinch rollers 31, 32, and the housing 30 are referred to as a roller device, and the bending rollers 34, 35, 38, 41 and the bearings 36, 3
7, 39, 43 and the support frame 40 are referred to as a roller bending device, but it goes without saying that the configuration can be modified in various ways without departing from the purpose and function.

In the present invention, for convenience of explanation, illustrations of the winding drum, the roller device, and the driving device of the roller bending device are kept to a minimum and omitted. Equipped with a driving motor and using a power transmission device consisting of gears and chains, or a power transmission device using spur gears, bevel gears, rotating shafts, etc., the purpose can be easily achieved and the equipment is compact. It can be a device.

An oxygen supply hose is connected to the starting end of the oxygen blowpipe 24 via a joint (not shown) to supply oxygen.

Now, since the oxygen blowpipe straightening and feeding device 19 of the present invention has the above-mentioned configuration, the oxygen blowpipe 24
can be freely inserted into and removed from the roller bending device by a roller device, and the roller bending device can vertically adjust the bearings 36, 37, etc. according to the bending of the oxygen blowpipe 24. The straightening function is adjusted by means such as performing this, and the oxygen blowpipe 24 can always be straightened into a straight pipe shape and fed out.

Further, when pulling back the oxygen blowpipe 24 as necessary, the oxygen blowpipe 24 is wound around the winding drum 23 by reverse operation of the pinch rollers 31 and 32 and the gear 27.

Next, FIG. 3 is a schematic side view showing the oxygen blowpipe straightening and feeding device 19 being moved from the standby position 19a to the opening position and feeding the oxygen blowpipe 24 toward the tap hole. Even when a high-strength steel pipe is used, its diameter is small, for example, 15 to 25 mm, so it may sag as shown by the broken line 24a due to its own weight, or swing from side to side due to vibrations from the drive device, etc. In order to accurately contact the taphole 2, it was necessary for the operator to manually guide the oxygen blowpipe 24 as described above.

Therefore, as shown in the schematic top view of FIG. 1, the present inventors installed a blowpipe guide device consisting of a rectangular frame and a chain drive conveyance device (not shown) on one side of the frame 20 of the oxygen blowpipe straightening and feeding device 19. 44 and supporting metal fittings that support the oxygen blowpipe 24 so that it can be inserted therethrough, such as a pipe guide 45, support arms 46a, 46b that support the pipe guide 45, and support arms 46a, 4.
A truck 49 to which a blowpipe guide fitting 48 made of a support pipe 47 to which a support pipe 6b is fixed is mounted so as to be movable forward and backward on the blowpipe guide device 44, and the truck 49 is engaged with the chain drive conveyance device. The cart 49 is configured to be movable between the front end 44a and the rear end 44b of the blowpipe guide device 44.

The trolley 49a in the standby position is located near the rear end 44b of the blowpipe guide device 44, and in the open position it moves as the oxygen blowpipe 24 is successively drawn out near the front end 44a as shown by a broken line 49b. As the truck 49 moves, the pipe guide 45 is pushed out while supporting the oxygen blowpipe 24 at a position 45a closest to the taphole 2, so that the oxygen blowpipe 24 can be accurately placed in the taphole 2. It can come into contact with you.

In order to further facilitate understanding, FIG. 4 shows a schematic perspective view of the blowpipe guide device 44. The trolley 49 is movably mounted on a frame 55, and further includes a rotating shaft 50a rotatably supported by the frame 55.
50b, chain gears 51a and 51b fixed to the rotating shafts 50a and 50b, respectively, and the chain 5.
2 and a drive device, such as an air motor (not shown), which is engaged with the rotating shaft 50a.
9 can move forward and backward on the frame 55.

Next, reference numeral 53 denotes a guide fitting for the support pipe 47, which is an arm plate 5 that extends over the tip of the frame 55.
It is fixed at 4. Further, in order to move the cart 49, it is possible to employ a combination of a pneumatic or hydraulic cylinder and a piston, a screw system, an endless rope system, etc., and a self-propelled system consisting of rollers and a driving motor can also be employed.

In addition, as shown in FIGS. 5a to 5d, the oxygen blowpipe 24
For example, a guide such as a pneumatic or hydraulic cylinder 58 having a piston 57 fixed to the tip thereof with a support fitting 56 such as a pipe such as the pipe guide 45, a half-cut pipe, a ring-shaped fitting, or a gripping fitting. Means for fixing the blowpipe guide device constituted by the device to the frame 20 (FIG. 5a), means for utilizing expansion and contraction by a pantograph 59 (FIG. 5b), and means for utilizing a telescope 61 (FIG. 5c) ), a means for attaching a top-hanging guide device 63 (FIG. 5 d) in which a garter 62 can be freely drawn out to the upper frame of an oxygen blowpipe straightening and feeding device can be adopted as appropriate.

In the present invention, the guide device refers to the trolley system shown in FIG. 4 and the various guide devices shown in FIGS. 5a to 5d.

Furthermore, in the present invention, in order to suspend the oxygen blowpipe straightening and feeding device at the tip of the revolving arm via the lifting device, the lifting device 13 is used as described above, and in addition, the lifting device 13 is used for hanging rods and monorails. An appropriate suspension device such as a hanging girder system or a link suspension system may be used.

(Example) The blast furnace taphole opening device according to the present invention was installed in a blast furnace with a daily production capacity of 10,000 tons, and drilling work was carried out. Achieved labor savings of 0.5 people.

(Effects of the invention) The hole-drilling device of the present invention is extremely compact as equipment, has extremely high hole-drilling performance, and is extremely safe, making it possible to improve the efficiency of hole-drilling work.
Since it can be mechanized by remote control, it also has a significant labor-saving effect.

[Brief explanation of the drawing]

Fig. 1 is a schematic top view of the blast furnace taphole opening device according to the present invention, Fig. 2 is a schematic side view of the oxygen blowpipe straightening and feeding device according to the present invention, and Fig. 3 is a schematic side view of the oxygen blowpipe straightening and feeding device according to the present invention. Fig. 4 is a schematic perspective view of the blowpipe guide device, Fig. 5 a to d are schematic explanatory views of different embodiments of the blowpipe guide device, and Fig. 6 is an open hole using a straight tube-shaped oxygen blowpipe. A schematic diagram of the device;
FIG. 7 is a schematic explanatory diagram of an apparatus for winding an oxygen blowpipe around a winding drum, straightening it, and opening holes. 1...Blast furnace, 2...Tapping port, 3...Steel rod, 3a
...Occluder, 4,4a,24...Oxygen blowpipe, 5...
...Oxygen blowpipe feeding device, 6...Oxygen blowpipe gripping roller, 6a, 11, 60...Air motor, 7...
... Rod, 8 ... Swivel arm, 9 ... Frame, 1
0... Bearing device, 12... Lifting cylinder, 13
... Lifting device, 14, 19 ... Oxygen blowpipe straightening and feeding device, 15, 23 ... Winding drum, 16 ...
Correction device, 17...Oxygen gas supply device, 18...
Flexible hose, 20,55...frame,
21, 40...Support frame, 22, 28, 3
3, 36, 37, 39, 43...Bearing, 25, 2
6, 27...Gear, 29...Horizontal rotation guide roller, 30...Housing, 31...Upper pinch roller, 32...Lower pinch roller, 34, 35, 3
8, 41...Bending roller, 42...Guide roller, 44...Blowpipe guide device, 45...Pipe guide, 46a, 46b...Support arm,
47...Support pipe, 48...Blowpipe guide fitting, 4
9... Cart, 50a, 50b... Rotating shaft, 51
a, 51b...Chain gear, 52...Chain, 53...Guide fitting, 54...Arm plate, 5
6...Supporting metal fittings, 57...Piston, 58...Cylinder, 59...Pantograph, 61...Telescope, 62...Girder, 63...Top-suspended guide device.

Claims (1)

[Scope of utility model registration request] A swing arm that is rotatably supported by a bearing device fixed to a structure near the blast furnace taphole and is rotatably operated via a drive device, and oxygen suspended from the tip of the swing arm via a suspension device. In a blast furnace taphole opening device comprising a blowpipe straightening and feeding device, the oxygen blowpipe straightening and feeding device is rotatably supported via a bearing device, and a winding drum has an oxygen blowpipe wound in a coil shape. a roller device that guides the oxygen blowpipe so as to be freely drawn out and pulled back from the winding drum; a roller bending device that straightens the bending of the oxygen blowpipe; the winding drum, the roller device,
A drive device of a roller bending device, a frame on which the same is mounted, a support metal fitting fixed to the frame and supporting the oxygen blowpipe drawn out from the oxygen blowpipe straightening and feeding device so as to be freely inserted, and a support metal fitting that holds the support metal fitting and further includes A blast furnace taphole opening device comprising a blowpipe guide device which is a guide device that guides a support fitting in the direction of the taphole so that it can move forward and backward.