JP6153092B2 - Outlet opening machine - Google Patents

Description

  The present invention relates to a tap hole opening machine used to open a tap port for discharging pig iron in, for example, a blast furnace that manufactures pig iron from iron ore, coke, and other auxiliary materials.

  A blast furnace for producing pig iron generally has to open a tap hole provided in the lower part of the furnace in order to discharge the molten pig iron (molten iron). This is because the taps that are not being put out are usually filled and sealed with an irregular refractory. And the opening is performed by rotating the hammering hole filled with an irregular refractory through the hole rod of the hole opening machine and penetrating it into the furnace. And the hot metal spouted from the spout is discharged to the topped car and the like through the spout together with the molten iron slag.

  By the way, the opening rod of the opening machine has a structure in which striking and rotation are overlapped until it completely penetrates the irregular refractory that seals the spout. In particular, this aperture rod is exposed to droplets (hereinafter referred to as “splash”) and simultaneously ejected gas together with high-temperature melt (molten metal, molten slag) discharged from the furnace at the moment of penetration. . At this time, the hole rod is a disposable replacement part because the most part of the hole rod is gradually melted by a high temperature melt, splash, gas or the like. That is, the hole opening machine is configured to detachably mount the hole opening rod on a rod mounting socket provided in a hole drilling machine constituting the drive unit (see Patent Document 1).

  In addition, as another example of the hole drilling machine, a configuration in which the entire hole drilling machine is surrounded by a heat insulating cover is disclosed in order to prevent an adverse effect due to heat of the hole drilling machine constituting the hole drilling machine (patent) Reference 2).

JP 2008-214720 A JP-A-4-371508

  As for the technique disclosed in Patent Document 1 described above, since the main body of the hole opening machine is close to a high temperature splash injection position where the main body of the hole opening machine is injected and spattered from the inside of the furnace, the splash is used as the hole opening machine. There is a tendency to adhere. At that time, the splash sometimes bites into the socket of the aperture rod. In this case, since the high-temperature splash must be removed manually, there is a problem that it takes time for the operator to burn and bruise.

  In addition, when the hot metal discharge is poor and there are many gas jets, it adversely affects the operation of the blast furnace. In addition, when such hot metal discharge is poor, there is a problem that splash is likely to scatter and biting into the socket portion is likely to occur. Furthermore, the splash was cooled and hardened by adhering to each part of the opening machine, and it was necessary to remove it.

  On the other hand, in the hole opening machine disclosed in Patent Document 2 described above, the adverse effect due to the heat of the hole drilling machine constituting the hole opening machine can be eliminated, but the entire hole drilling machine needs to be surrounded by a protective cover. In addition, there is a problem that splash cannot be completely prevented from entering through the gap between the protective cover and the aperture rod.

  Accordingly, an object of the present invention is to prevent splash biting into the opening machine socket after opening the tap hole, and to reduce the danger and trouble of the operator due to removal of the biting splash. The purpose is to propose a tap opening machine that can be reduced and, in turn, effective in eliminating adverse effects on blast furnace operation.

As a result of diligent research to solve the above-mentioned problems of the prior art and to realize the above-mentioned object, the inventors have developed a novel tap hole opening machine described below. That is, the present invention relates to a sprue hole opening machine in which an opening rod is detachably attached to a rod mounting socket of a hole drilling machine, and a splash adhesion preventing plate having a through hole is disposed around the opening rod. The opening machine is characterized in that a clearance is provided and the splash adhesion preventing plate is rotatably attached to the shaft of the opening rod .

In the opening machine according to the present invention configured as described above,
(1) The splash adhesion prevention plate rotates in the circumferential direction of the aperture rod as the aperture rod is rotated by the hole drilling machine,
(2) the perforator performs taphole opening tip of the opening rod is inclined so as to be lower, when withdrawing the hole rod from the taphole, said splash preventing adhesion plate, wherein It was configured to remain in the vicinity of the tap opening with its own weight of the splash adhesion prevention plate ,
However, this is considered to be a more preferable solution.

  According to the tap hole opening machine of the present invention, the splash adhesion preventing plate is rotatably attached to the hole rod, so that the splash biting into the socket of the hole opening machine can be easily performed with a simple configuration. Can be prevented, and a smooth opening operation can be realized.

It is a figure for demonstrating an example of the tap hole opening machine of this invention. (A), (b) is the front view and side view for demonstrating an example of the splash adhesion prevention board in the tap hole opening machine of this invention, respectively. (A)-(c) is a figure for demonstrating an example of operation | movement of the splash adhesion prevention board in the tap hole opening machine of this invention, respectively. (A), (b) is a figure for demonstrating an example of the splash adhesion prevention effect of the splash adhesion prevention board in the tap hole opening machine of this invention, respectively.

  FIG. 1 is a view for explaining an example of a tap hole opening machine. The illustrated tap hole opening machine mainly includes a drilling machine main body 8 located at the rear part, an opening rod 6 detachably attached to the front part of the main body, and these drilling machine main body 8 and the opening rod. 6 and a long guide cell 5 that supports 6. The guide cell 5 is supported via a plurality of suspension poles that are pivotally supported under the deck 2 surrounding the furnace body above the tap hole 9, in the illustrated example, the main frame 3 and the hanger frame 4. Then, the drilling machine main body 8 and the opening rod 6 move forward or backward along the guide cell 5 held in the orientation and orientation oriented toward the tap hole 9. The aperture rod 6 is held under the guide cell 5 via the rod hanger 7 and, as described above, the rear end portion thereof is attached to and detached from the socket 10 provided in the joint portion 8a of the drilling machine main body 8. It can be attached.

  In order to open the spout opening with the spout opening machine having such a configuration, first, the tip of the opening rod 6 is in a position facing the spout opening 9 and oriented in the opening direction. Thus, the guide cell 5 is moved. Then, the hole drilling machine body 8 is actuated to start drilling toward the tap hole 9 while rotating the connected hole rod 6 and hitting the rear end. That is, by rotating and striking the hole drilling machine main body 8, the hole rod 6 is forwardly rotated and hammered positively, and the unshaped refractory (mud) of the tap hole 9 is scraped in the thickness direction by the hole rod 6. Cut down sequentially. Then, the inside of the tap hole 9 is dug by the opening rod 6 and the mud leading to the inside of the furnace is broken to open the tap hole 9. The opening rod 6 after opening the tap hole 9 is reversely hit and reversely rotated on the drilling machine main body 8 so as to be extracted from the outlet port 9.

  The tap hole opening machine of the present invention is characterized in that, in the opening machine described above, as shown in FIG. 1, the splash adhesion preventing plate 11 is attached to the opening rod 6 between the rod hanger 7 and the socket 10. It is a point that is pivotably attached. Hereinafter, the configuration, operation, and function of the splash adhesion preventing plate 11 that is a feature of the present invention will be described.

  2A and 2B are views showing an example of the splash adhesion preventing plate 11 unique to the present invention. As a preferred embodiment of the present invention, the disc-shaped splash adhesion preventing plate 11 is fitted so as to be rotatable with respect to the circumferential direction of the aperture rod 6 and movably attached in the axial direction of the aperture rod 6. Are preferred. Specifically, as shown by the double-headed arrow in FIG. 2 (a), the disc-shaped splash adhesion preventing plate 11 is configured to be movable along the axial direction of the aperture rod 6, and FIG. 2 (b). As shown by the double arrows, a disc-shaped splash adhesion preventing plate 11 is rotatably fitted around the aperture rod 6.

  The splash adhesion preventing plate 11 has a central through hole 11a. The size of the through-hole 11a is preferably such that the clearance C between the opening rod 6 and the shaft diameter is about 1 mm to 5 mm. The splash adhesion preventing plate 11 rotates as the aperture rod 6 rotates, and the splash adhesion preventing plate 11 moves along the aperture rod 6 to the tip thereof by tilting the aperture rod 6.

  Further, the splash adhesion preventing plate 11 is preferably formed of a heat resistant material such as iron, and the size thereof can be appropriately determined according to the aperture rod 6 or the like. As an example, the dimensions of the disc-shaped splash adhesion preventing plate 11 are as follows: thickness: 2 mm, outer diameter: 240 mm, inner diameter of the through hole 11a: 40 mm, and size of the rectangular portion 11b: 20 mm × 20 mm. Note that the square portion 11b is opened so that, for example, the protrusions do not get in the way when the aperture rod 6 is inserted into the splash adhesion prevention plate 11, but this is not an essential configuration, and if necessary, it can be opened. Good.

  3A to 3C are diagrams for explaining an example of the operation of the splash adhesion preventing plate in the tap hole opening machine of the present invention.

  First, as shown in FIG. 3 (a), the guide cell 5 is placed on the left side of the guide cell 5 in the state in which the aperture rod 6 and the drilling machine main body 8 are positioned at the rear part (preparation of aperture) of the guide cell 5. Move to the mouth side). Then, as indicated by the wavy line in the figure, the movement of the guide cell 5 stops at the position where the tip of the aperture rod 6 is in the vicinity of the tap hole 9.

  Next, FIG. 3B shows a state (opening state) in which the hole punching machine body 8 has moved to the left side in the drawing with respect to the guide cell 5 by proceeding with the tap hole opening work. That is, this state is a state in which the opening rod 6 passes through the spout 9 and splash is ejected to the outside of the spout 9. In this state, the splash adhesion preventing plate 11 is positioned between the tip hanger frame 12 and the socket 10 of the hole drilling machine body 8.

  Thereafter, as shown in FIG. 3 (c), the drilling machine main body 8 is retracted to the right side in the drawing with respect to the guide cell 5, and the aperture rod 6 is pulled out from the tap hole 9. At that time, the splash adhesion preventing plate 11 is left in its own position due to its own weight because the hole opening machine is arranged toward the lower left side. In some cases, it moves slightly to the right as the aperture rod 6 is retracted, but the splash adhesion prevention plate 11 remains at substantially the same position. For this reason, the splash adhesion prevention plate 6 can effectively prevent pig iron protruding from the spear opening 9 from adhering to the socket 10.

  4 (a) and 4 (b) are diagrams for explaining an example of a splash adhesion preventing effect in the tap hole opening machine of the present invention. As shown in FIGS. 3 (a) to 3 (c), in the tap hole opening machine of the present invention, in the state where the tap hole 9 is opened by the hole rod 6, the vicinity of the tap hole 9 is shown. Since the splash adhesion preventing plate 11 remains on the aperture rod 6, as shown by the oblique lines in FIG. 4 (a), the molten iron and molten slag ejected from the spout 9 are blocked by the splash adhesion preventing plate 11, and this oblique line portion Will not reach. Since the opening rod 6, the socket 10 and the hole drilling machine main body 8 are always present in the shaded portion while retracted from the tip position (in the figure, the socket 10 is (A), (B), The case of retreating in the order of (C) is illustrated), and is not affected by pig iron ejected from the spout 9.

  Further, since the aperture rod 6 is rotated during retraction in order to be pulled out from the tap hole 9, the splash adhesion preventing plate 11 remaining at its tip due to its own weight also slightly rotates as the aperture rod 6 rotates. As shown in FIG. 4 (b), the rotation of the splash adhesion preventing plate 11 can disperse hot metal or the like spouted to the splash adhesion preventing plate 11 further by the centrifugal force, thereby preventing the splash. Can be further enhanced.

  In the opening machine of the present invention described above, in addition to the effect of protecting the socket 10 and the like from the splash (such as molten iron) ejected from the spout, the splash adhesion preventing plate 11 is rotatable with respect to the opening rod 6. Since the splash adhesion preventing plate 11 is not fixed to the aperture rod 6, the splash adhesion preventing plate 11 is splashed from the aperture rod 6 as compared with the case where the splash adhesion preventing plate 11 is fixed to the aperture rod 6. The anti-adhesion plate 11 can be removed, and the aperture rod 6 can be easily replaced, and the space for preparation can be reduced, and an aperture machine with excellent workability can be obtained.

  In the above description, the example in which the opening machine of the present invention is used for opening the tap hole 9 of the blast furnace has been described. However, the hole punching machine of the present invention is also suitably used as a hole drilling machine for forming a branch path in the tapping that moves the hot metal punched out from the taping port 9 to a predetermined place. Can do.

  The tap hole opening machine according to the present invention is used for opening the tap hole of a blast furnace, and so on, with a simple configuration, the adhesion of the splash to the hole opening machine, particularly the splash to the rod mounting socket. It is possible to prevent biting, eliminate the trouble of removing the splash when biting occurs, and realize stable blast furnace operation.

DESCRIPTION OF SYMBOLS 1 Blast furnace 2 Deck 3 Main frame 4 Hanger frame 5 Guide cell 6 Opening rod 7 Rod hanger 8 Drilling machine main body 8a Joint part 9 Outlet 10 Socket 11 Splash adhesion prevention plate 11a Through-hole 11b Rectangular part 12 Tip hanger frame

Claims (3)

In a tap hole opening machine in which a hole mounting rod is detachably attached to a rod mounting socket of a hole drilling machine, a splash adhesion prevention plate having a through hole is inserted with a clearance around the hole opening rod. The opening machine characterized in that the splash adhesion preventing plate is mounted so as to be rotatable with respect to the shaft of the opening rod . 2. The hole puncher according to claim 1, wherein the splash adhesion preventing plate rotates in a circumferential direction of the hole rod as the hole rod is rotated by the hole drilling machine. The opening machine is tilted so that the tip of the opening rod faces downward, and the opening is opened, and when the opening rod is pulled out from the opening, the splash adhesion prevention plate prevents the splash adhesion. The hole opening machine according to claim 1, wherein the hole opening machine is configured to remain in the vicinity of the tap hole with its own weight .

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