JPS6344439Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is an oxygen hole punching machine for blast furnace tapholes that facilitates the retraction operation of the oxygen hole punching machine without being affected by the front equipment of the blast furnace. Regarding the evacuation device.

[Conventional technology]

As a device for opening a blocked blast furnace tap hole, for example, as explained in Japanese Utility Model Publication No. 53-4168, a percussion type hole drilling machine is mounted on one evacuation device, and the hole drilling machine is installed in one evacuation device. Some drill holes are made using a drill bit or a metal rod. However, if it becomes difficult to open the tap hole due to solidification of the molten pig iron, breakage of the iron rod, etc., a separately prepared oxygen lance is manually applied to the tap hole to eliminate the oxidation and combustion caused by the oxygen lance. A method of opening a tap hole by removing a blockage blocking the tap hole using heat is often used. However, drilling a taphole like this is a work that involves high heat and is performed manually, making it easy for unexpected accidents to occur. Therefore, it has been desired to develop a device for opening a blocked tap hole safely and labor-savingly.

In order to meet this demand, an oxygen hole drilling machine as shown in FIGS. 3a to 3c was proposed in Utility Model Application No. 112,480/1980. In the oxygen drilling machine, a pivot shaft c is supported by two upper and lower bearings b attached to a tuyere deck a. A pinion d is attached to the upper end of the pivot shaft c, and a pivot arm e is attached to the lower end. The pinion d meshes with a rack g connected to the arm rotation cylinder f. On the other hand, the rotating arm e
is equipped with a vertical cylinder i for vertically moving an oxygen lance feeding device h. This vertical cylinder i is connected to an oxygen lance feeding device h via a roller chain j. Further, a guide roller k is built into the tip of the swing arm e, and the support l is always held between the guide roller k to prevent the oxygen lance feeding device h from swinging.

When opening a closed tap hole with an oxygen hole drilling machine having this structure, first, the swing arm e is rotated to a hole opening set position in front of the tap hole m by operating the arm swing cylinder f. During this turning, the oxygen lance feeder h is maintained in the raised position by the roller chain j in order to avoid obstacles such as the gutter cover n. Next, the vertical cylinder i mounted on the swing arm e is operated, and the roller chain j
The oxygen lance sending device h is lowered through the hole setting position until it is located on the center line of the tap hole m. In this state, set the oxygen lance p,
Insert into tap hole m. Then, the operation to open the blocked tap hole m is performed. When the tap hole m is opened, the oxygen lance p is removed, the oxygen lance sending device h is raised, and the swing arm e is turned to the storage position. This completes a series of hole drilling operations.

[Problem that the invention attempts to solve]

Usually, a mazudogan is placed in front of and next to the blast furnace taphole, and on the opposite side of the mazudogan location, there is enough space to evacuate the taphole and the gutter cover that covers the taphole and gutter so that they can be opened and closed. . Furthermore, the height and width of the deck around the tuyere located above the taphole naturally vary depending on the size of the blast furnace, and even blast furnaces of the same size may have different heights and widths.

However, in the above-mentioned oxygen hole punching machine, the bearing b supporting the swing arm e for retracting the oxygen hole punching machine is
is installed next to the tuyere deck a. For this reason, in some blast furnaces, when installing the oxygen drilling machine, the gutter cover n and the oxygen lance feeder h or the gutter cover (provided between the tap hole m and the gutter cover n) are (not shown), it is necessary to extend the tuyere deck a considerably in order to avoid interference between the gutter cover and the pivot axis c. Furthermore, in order to avoid interference between the oxygen hole drilling machine and the rear gutter cover n during turning and retreat, it is necessary to lift the oxygen lance sending device h using the up-and-down cylinder i. Therefore, if the vertical cylinder i does not operate for some reason, the oxygen hole opening machine cannot be evacuated from above the gutter. In such a case, it is necessary to manually lift the oxygen lance sending device h to a state where it can be swiveled and retracted. However, since the lifting work is carried out on a large gutter, it is a very dangerous work.

Therefore, the evacuation device of the present invention provides an evacuation device that allows the oxygen drilling machine to be easily evacuated without being forced to perform such dangerous work and without being affected by the equipment in front of the blast furnace. The purpose is to do.

[Means for solving problems]

In order to achieve the purpose of the evacuation device of the present invention,
The present invention is characterized in that a revolving frame is installed on the tuyere deck above the blast furnace taphole, and a parallel link arm that is rotatable in the vertical direction by a drive mechanism such as an air motor or an air cylinder is provided on the revolving frame.

That is, by storing the oxygen perforator on the tuyere deck, there is no need to modify the deck, and it can be installed in blast furnaces of all sizes. Further, even in a case where the drive mechanism or the power transmission mechanism cannot be operated, the oxygen drilling machine can be evacuated by manually driving it on the safe tuyere deck.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to embodiments shown in the drawings.

FIG. 1 is an elevational view of the oxygen hole drilling machine evacuation device of this embodiment, and FIG. 2 is a plan view thereof. In FIGS. 1 and 2, the solid line indicates the position when the oxygen drilling machine is set in the taphole, and the broken line indicates the retracted position.

The evacuation device includes a rotating frame 3 that is rotatably provided on a rotating base 2 fixed to a tuyere deck 1. The pivot frame 3 is provided with a parallel link arm 5 that is vertically rotatable by a suitable drive means such as an air motor 4. A hand-wound winch 6 for manually driving the parallel link arm 5 is disposed within the rotating frame 3. The rotating frame 3 is driven by a rotating base 2 and an air cylinder 7 rotatably supported as shown in FIG.
etc. In addition, in the figure, the reference numeral 8 is an oxygen lance feeding device corresponding to h in FIG. 3.

Next, the operation of the oxygen hole drilling machine will be explained.

The oxygen lance feeding device 8, which is housed on the tuyere deck 1 in the state shown by the broken line in FIG. (solid line in Figure 2). Then, the parallel link arm 5 is rotated downward by the air motor 4, and the oxygen lance feeder 8 is set at the taphole center position on the elevation (the state indicated by the solid line in FIG. 1). In this way,
Preparations for drilling work are completed.

The evacuation operation of the oxygen hole opening machine is an operation opposite to this preparation process.

If the parallel link arm 5, driving air motor 4, etc. do not operate for some reason, the clutch (not shown) is switched and the hand-wound winch 6 provided on the revolving frame 3 raises the parallel link arm 5 and then rotates it. After that, evacuate the oxygen hole drilling machine. That is, the work at this time can be carried out safely on the tuyere deck 1, and the work is not forced to be carried out near the large gutter, unlike the conventional work.

[Effect of idea]

As explained above, in the evacuation device of the present invention, the rotation and lifting movements of the oxygen hole drilling machine are performed by the rotation frame and the parallel link arm, respectively, and the rotation frame is arranged on the tuyere deck. The operation for setting and retracting the oxygen drilling machine from the blast furnace taphole can be performed without being affected by various front-of-the-furnace equipment.
In addition, manual evacuation operations that may be required in some cases are not performed near the gutter, which can be dangerous, as in the past.
Since the work is carried out on a safe tuyere deck, worker safety is ensured. Moreover, since the oxygen hole puncher can be housed on the tuyere deck, there are no installation restrictions for blast furnaces of any size.

[Brief explanation of the drawing]

FIG. 1 is an elevational view of an oxygen hole punch retraction device according to an embodiment of the present invention, and FIG. 2 is a plan view thereof. Moreover, FIGS. 3a to 3c show a conventional evacuation device for an oxygen hole drilling machine.

Claims (1)

[Scope of utility model registration request] A blast furnace characterized in that a revolving frame is installed on a tuyere deck above the blast furnace taphole, and a parallel link arm that is rotatable in the vertical direction by a drive mechanism such as an air motor or an air cylinder is provided on the revolving frame. Evacuation device for oxygen drilling machine for taphole.