JPS5846106Y2 - Boring guide for mortar press-in hole on side wall of blast furnace body - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a guide used when polling is performed when repairing the inner surface of the furnace body of a blast furnace.

If the refractory bricks in the blast furnace are partially damaged,
As shown in the figure, a hole 13 is drilled through the shell 11 and the refractory bricks 12 in the damaged part of the furnace body 1, and a monolithic refractory 14 is injected through the hole and solidified. We are trying to temporarily repair it.

In this case, after the refractory is injected, the hole 13 must be covered with a steel plate to prevent gas leakage, but monolithic refractories are weaker than firebricks, so repairs were made. Frequently, parts break over again, thus requiring the same location to be drilled multiple times.

For this reason, conventionally, as shown in Figure 1, the hole 13 is made larger in advance, a flanged pipe a is inserted and welded, and a cover b is fixed to the flanged end of the pipe with bolts, making it necessary to drill the hole again. When necessary, after removing cover b, the boring machine was hung with a rope or the like, and the hole was drilled aiming at the center of the pipe.

However, in this method, it is difficult to center the drill and the drill is guided to the center of the pipe, resulting in the hole being drilled at an angle. The adhesion state is unfavorable, and there is also the drawback that it is difficult to pull out the drill and set the press-fit nozzle during drilling.

The purpose of the present invention is to obtain a polling guide that can eliminate the drawbacks of the prior art and to improve the effectiveness of mortar repair.

The basic structure of the polling guide of the present invention is as shown in FIG. It consists of a guide member 3 that can be moved and a member 4 that removably connects these two members, and is particularly characterized by the structure other than the introduction member 2.

A conventional pipe can be used as the introduction member 2, and a hole 13 is inserted through the furnace wall corresponding to the damaged part.
It is a pipe material that is inserted from the outside and a part of the middle part is welded and fixed to the steel shell 11, and is formed to correspond to the hole 13 that is pre-drilled to a large size, and the protruding end has a flange for attaching the cover. 21 is the provision.

One guide member 3 is integrally formed with a flange 31 that can tightly engage with the flange 21 of the introduction member and a guide pipe 32, and the guide pipe 32 has an inner diameter slightly larger than the outer diameter of the drill. When the flanges 21 and 31 are assembled, the axial center of the guide pipe 32 and the axial center of the introduction member 2 are aligned on the same line.

As shown in FIG. 3, the annular opening/closing type connecting member 4 that connects the introduction member 2 and the guide member 3 is mainly composed of an annular body 41 that is divided into two parts in the diametrical direction, and one end is connected to a pin 4.
2, which can be opened and closed freely, and a locking protrusion 43 is provided on the opening/closing side of the other end, and a latch is provided at a position facing the metal 44, and the swinging type bundle 45 is When operated, the hook locks the metal 44 and the protruding piece 43 to maintain the annular shape.

The annular body 41 is a bridge-shaped member having a substantially U-shaped cross section as shown in FIG. The member 2 and the guide member 3 can be joined together.

The guide member 3 is attached to the introduction member 2 when the cover is removed, and in the attached state,
The guide pipe 32 maintains a predetermined perpendicularity to the furnace wall.

Therefore, the drill 5 inserted using the guide pipe as a guide maintains a perpendicular angle to the furnace wall surface, and a press-fit hole is drilled through the furnace wall at right angles.

Further, the position of the perforation is stabilized on the axial center line of the hole 13 and the introducing member 2.

4 and 5 relate to another embodiment of the guide of the present invention.

In this embodiment, the guide pipe 3 on the guide member side
Another guide pipe 22 that matches the guide pipe 2 is also fixedly installed on the introduction member 2 side, making it possible to further stabilize the guidance of the insertion drill.

As described above, according to the polling guide of the present invention, it is possible to drill a press-fit hole with desirable conditions, and therefore, the interior of the furnace can be effectively repaired by mortar injection.

Furthermore, the guide member can be attached and detached with just one touch, and the attachment condition is stable.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of the furnace body after mortar repair. FIG. 2 is a cross-sectional view of a mortar press-fit hole in which the polling guide of the present invention is installed. FIG. 3 is a drawing of FIG. 2 viewed from the Ill-III direction. FIG. 4 is a drawing similar to FIG. 2 showing another embodiment of the guide of the present invention. FIG. 5 is a sectional view taken along the line ■-V in FIG. 4. 1; Furnace body, 11; Iron shell, 12; Refractory brick, 13; Hole, 1
4; Mortar, 2; Introduction member, 21; Flange, 3; Guide member, 31; Flange, 32; Guide pipe, 4;
Connecting member, 41; Annular body, 42; Pin, 43; Protruding piece, 4
4; Hanging is gold, 45; Bundle, 5; Drill.

Claims (1)

[Scope of utility model registration request] In a pipe-shaped introduction member having one end inserted into a mortar press-fit hole in a furnace wall and having a flange at the other end and fixed to a steel shell so as to project outward from the furnace wall, a flange that tightly engages with the flange of the introduction member. 1. A poling guide for a mortar press-in hole in a side wall of a blast furnace body, comprising a guide member made of a guide pipe having a guide pipe, and an openable and closable annular connecting member that connects flanges of the introduction member and the guide member.