JP2610446B2 - Insulated furnace wall structure - Google Patents

Description

The present invention relates to a furnace wall structure in which a laminated fiber block for heat insulation is closely attached to a furnace wall.

(Prior Art) As an example of a block mounting method when a furnace wall is constituted by a heat-insulating block, a cylindrical nut having a predetermined intestine is welded to a surface of a steel shell in advance so as to protrude therefrom. A method has been proposed in which the position of the guide cylinder member of the block is adjusted and a bolt is inserted and screwed from within the cylinder (Japanese Patent Publication No. 60-53270). However, this method makes it extremely difficult to position the bolt with respect to the nut hole. is there.

To remedy this drawback, a male screw is formed on the surface of the cylindrical nut, and a stopper nut is screwed in advance between the male screw and a guide rod is screwed into the tip nut of the male screw. A method in which the center hole of the support plate of the block is guided by the guide rod after being connected and fitted to the screw body, and the support plate is clamped and attached by a fastening nut has been proposed as Japanese Patent Application Laid-Open No. 61-29679. I have.

This proposal solves the disadvantage of alignment, but when screwing the tightening nut, a guide rod must be connected to the tip of the male thread, and a special cylindrical shape with a male thread on the surface is required. A new drawback arises, such as the necessity of a nut and a special box wrench capable of holding the tightening nut and fitting the guide rod during rotation. At present, the performance has hardly improved.

Further, the furnace wall structure by such a mounting method has a drawback that the fixing stability of the block is low.

(Purpose) It is an object of the present invention to provide a furnace wall structure which is excellent in workability of mounting the heat insulating block of the present invention, fixing reliability of the block, and can easily perform partial repair.

(Configuration) In the furnace wall structure of the present invention, the mounting plate of the holding member in which the holding member is connected to the mounting plate provided with the nut is located on the back side of the rectangular block of the heat-insulating laminated fiber, and the holding member is provided. The nut is embedded in the rectangular block, and the nut is screwed and fastened to a bolt with a square hole at the tip which is rotatably inserted into a U-shaped fixing bracket fixed to a furnace wall steel shell.

The rectangular block is preliminarily compressed and loaded with a heat-insulating laminated fibrous body together with a holding metal into a temporary frame having a U-shaped cross section in which a small hole for inserting a rotating tool is formed in a flat plate portion. It is formed by removing the frame.

The nut of the presser fitting is located corresponding to the small hole formed in the flat plate portion of the U-shaped temporary frame.

In addition, a bolt having a square hole formed in the end face is inserted into the U-shaped bracket fixed to the iron skin, and the bolt is screwed into a nut of the holding bracket by a rotating tool inserted from a small hole of the temporary frame. You.

The rotating tool is provided with a prismatic projection at the tip thereof for engaging with the square hole, and it is preferable to provide an insertion guide cylinder around the small hole of the temporary frame.

(Example) In the figures, 1 is a furnace wall steel, 2 is a U-shaped bracket fixed to the inner surface thereof at predetermined intervals by welding or the like, 3 is a flange, 4 is a leg, 5 is a flat plate, and is a bolt fitting. Insertion hole 6
Are drilled. 7 is a bolt with a head, the top surface 8
Is preferably a flat surface. Reference numeral 9 denotes a square hole formed in the bolt tip surface. Reference numeral 10 denotes a backup material made of heat-insulating fibers disposed on the inner surface of the furnace wall, and is preferably disposed so as to be equal to the height of the legs of the U-shaped fixing bracket. Absent.

11 is a square block, 12 is a heat-insulating laminated fibrous body constituting the block, and 13 is a holding member. The structure of the holding member is as shown in FIG. 3, in which a holding rod 16 is connected via a leg member 17 to both ends of a mounting plate 15 on which nuts 14 are fixed. 15a is a bolt through hole.

20 is a temporary frame, 21 is a flat plate portion, 22 is a small hole, and 23 are both side walls. Numeral 24 denotes a rotating tool insertion guide tube which stands or is fixed around the small hole, and can be omitted.

Reference numeral 30 denotes a framed block before mounting, in which the heat-insulating laminated fibrous body 12 and a portion excluding the mounting plate 15 of the holding bracket 13 are pushed into the temporary frame 20, the fibrous body 12 is loaded in a compressed state, and the mounting plate is mounted.
15, the fibrous body 12 and the temporary frame 20 are integrally tightened by a tightening member 31.

The rotating tool 33 is provided with a prismatic projection 35 at the tip of the rod 34 for engaging with the square hole 9 of the bolt, and is formed in a T shape or a crank shape. 36 is a handle.

(Mounting method) As shown in FIG. 5, the nut 34 is inserted through the small hole 22 of the frame-equipped block 30 with the rod 34 of the rotating tool, and the tip of the rod is projected.
35 is fitted into the square hole 9 of the bolt 7 protruding from the U-shaped fixture 2 and the handle 36 is operated to screw the bolt 7 to the nut 14. Since the rotating rod is tapered, it can be inserted into the fibrous body without the guide tube 24.

When the state shown in FIG. 6 is reached, the binding material 31 is cut off, the bolts are further tightened, and then the temporary frame 20 and the guide tube 24 are removed. The peripheral block expands into a rectangular block 11, which is in close contact with the adjacent rectangular block to be in the state shown in FIG.

Therefore, when the backup material is not used, the rectangular block directly adheres to the inner surface of the steel shell. However, the thickness of the backup material may be accurately regulated by using the legs 4 of the U-shaped bracket.

(Effects) According to the present invention, since the mounting plate 15 of the rectangular block is fastened to the flat plate portion 5 of the U-shaped fixture with wide surface contact, the mounting is stable, so the mounting reliability is high and the mounting and dismounting are easy. Good workability.

Further, it is sufficient that the length of the bolt 7 is such that its tip protrudes from the female screw portion of the nut 14, so that a relatively short bolt is not only economical, but also the screwing and turning operation to the nut is possible. There is an advantage that the work can be performed easily and quickly.

[Brief description of the drawings]

FIG. 1 is a sectional view of the furnace wall structure of the present invention, FIG. 2 is an exploded perspective view showing a mounting relationship of a framed block to a fixing bracket, and FIG.
Fig. 4 is a perspective view of a holding member, Fig. 4 is a perspective view of a temporary frame, and Figs. 5 and 6 are cross-sectional views showing a process of mounting a block with a frame. (Explanation of symbols) 2 ... U-shaped fixing bracket 4 ... Leg 5 ... Flat plate 7 ... Bolt with head 9 ... Square hole 10 ... Back-up material 11 ... Square block 12 ... Heat-insulating laminated fiber Body 13 Hold-down bracket 14 Nut 15 Mounting plate 16 Hold-down rod 20 Temporary temporary frame 22 Small hole 24 Guide cylinder 30 Block with frame 31 Binding material 33 … Rotating tool 35 …… Square prism protrusion

Claims (2)

(57) [Claims] 1. A mounting member having a holding member connected to a mounting plate provided with a nut, wherein the mounting plate is located on the back side of a rectangular block of a heat-insulating laminated fiber, and the pressing member is provided in the rectangular block. A furnace wall structure comprising a heat insulating block buried and the nut is screwed to a bolt with a square hole at the tip, which is rotatably inserted into a U-shaped fixture fixed to the furnace wall steel. 2. The furnace wall structure according to claim 1, wherein the height of the legs of the U-shaped fixture is adjusted to a desired thickness of the backup heat-insulating layer.