JP2941661B2 - Water pipe wall protection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water tube wall protection structure for a furnace.

[0002]

2. Description of the Related Art A furnace wall of a large municipal waste incinerator has a water tube wall structure having a large number of water tubes therein, and heat is exchanged between heat generated in the furnace during incineration and water flowing through the water tubes. For example, there is one that uses waste heat, such as extracting it as steam and using it for power generation.

In the above water tube wall structure, as shown in FIG. 5, a horizontal cross section of a part thereof, adjacent water tubes 1, 2,. The bolts 3 are welded to the fins 2 every three water tubes,
Two water tubes 1,1 and approximately 1/2 of the water tubes 1,1 on both sides
200 □ preformed so that it can be straddled over the width
The bolt 3 is inserted into the center hole 5 of the panel
Through the recess 6 formed in the inner surface of the panel brick 4
And then the plug brick 8 is inserted into the recess 6.
Are packed so as to cover the nut 7. Thus, the water pipe wall is constituted by the panel bricks 4 which are sequentially arranged.

[0004]

However, in the above-mentioned conventional water pipe wall structure, it is necessary to pass the panel bricks 4 one by one through the bolts 3 and fasten them with the nuts 7 to attach them. Even if the nut 7 is covered with the plug brick 8, it is inevitable that the nut 7 will be burned out by the heat in the furnace, and the panel brick 4 has a hole 5 through which the bolt 3 passes, so that cracks may occur. There are various problems that the service life is short, such as easy occurrence and dropping of the panel brick 4 due to this.

[0005] In view of the above, the present invention eliminates the means for attaching bricks with bolts, enables quick construction, prevents bricks from falling off, and greatly extends the service life of the water pipe wall. The purpose is to provide a structure.

[0006]

As a means for solving the problems of the prior art, the present invention relates to a fin which has a trapezoidal cross section with one side surface being an inclined surface and has a back portion connecting water pipes to each other. A set of two protective bricks having blind hole-shaped mounting holes for fitting to the protruding support shafts is provided, and the mounting holes are mounted on the support shafts so that the side surface opposite to the inclined surface thereof faces. An anchor stud is implanted in the fin at a position where the inclined surfaces of the protective bricks face each other with a filler such as mortar interposed therebetween, and the anchor brick includes the anchor stud and the inclined surface of the protective brick from the fin. , A refractory is filled, and the protective brick is held through the inclined surface by solidification of the refractory.

[0007]

The mounting hole of the protective brick is fitted to the support shaft projecting from the fin connecting the water pipes with a filler such as mortar. At this time, make sure to face the vertical side opposite to the slope of the protective brick, and in the gap where the slopes of the protective brick face each other, include an anchor stud protruding from the fin, and from the fin to the entire slope of the protective brick Fill with irregular shaped refractories and construct. In this way, by sequentially applying the protective bricks, the inclined surface of the protective bricks is held by the wedge action by solidification of the irregular refractory, and since the support shaft is covered with the protective bricks, there is no burning due to heat in the furnace.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 shows a front view of a part of a water pipe wall protection structure according to the present invention, FIG. 2 shows a cross section taken along line AA of FIG.
Indicates a cross section taken along line BB in FIG.

The protective brick 10 used in the present invention
As shown in FIG. 4, one of the side surfaces has an inclined surface 11.
It has a trapezoidal cross section, and has a blind hole-shaped mounting hole 12 formed at the center of the back surface, and is used as a pair.

The fins 2, 2, which connect the water pipes 1, 1,... Arranged side by side, have projecting support shafts 13, 13 which can be inserted into the mounting holes 12 of the protective brick 10. This support shaft 1
The arrangement intervals of 3, 13,... Are such that each of the protective bricks 10, 1 when the vertical side surfaces 10a opposite to the inclined surface 11 of the protective bricks 10, 10 are opposed to each other with a required joint interval.
The supporting shafts 13 are fitted into the mounting holes 12 of the “0”.

The fins 2, 2,... Of the protective bricks 10, 10 where the inclined surfaces 11, 11 face each other are Y
, V-shaped anchor studs 14, 14... Are implanted by welding or the like. In addition, the anchor studs 14, 14
As shown by dotted lines in FIG. 1, anchor members 15, 15 such as chain links, for example, which are formed by expanding coiled wires, are fixed to the water pipes 1, 1,. .

Therefore, at the time of construction, first, the water pipe 1,
1 and fin 2 are coated with mortar 16, and then a pair of protective bricks 10, 10 has a side surface 1 opposite to the inclined surfaces 11, 11.
The mounting holes 12, 12 are fitted to the support shafts 13, 13 with a filler material such as mortar 16 interposed therebetween so that the inclined surfaces 11, 10a face each other. , Including the anchor members 15, 15 and the inclined surfaces 11,
11 are filled with the irregular-shaped refractory 17, and the inclined surfaces 11, 11 of the protective bricks 10, 10,... Are pressed down and held by the wedge action by the solidification of the irregular-shaped refractory 17. It is preferable to use a plastic refractory as the irregular refractory 17.

With the above configuration, the support shafts 13, 13 are provided in the furnace.
Are not exposed, and the protective bricks 10, 10 are pressed down on the inclined surfaces 11, 11 by the irregular refractory 17, so that they can be securely held. If the anchor member 15 is also fixed to the water pipe 1, the support of the irregular-shaped refractory 17 can be further enhanced.

[0014]

As described above, according to the present invention, the load in the vertical direction is supported by fitting the mounting hole on the back surface of the protective brick to the supporting shaft planted in the fin between the water pipes, and the peeling direction. By holding the inclined surface of the protective brick by pressing it with irregular shaped refractory, it is not necessary to tighten bolts for each brick as in the past, it is possible to significantly reduce the number of steps, It is possible to greatly reduce the length of the support brick, and since the support shaft does not penetrate through the protective brick, there is no deterioration of the support shaft due to heat, and the support force can be provided for a long time. In addition, the protective brick is held down by the irregular refractory whose inclined surface is integrated with the anchor stud (and anchor member), preventing the protective brick from protruding into the furnace and reliably preventing the protective brick from peeling off. can do. Further, since the mounting hole of the protective brick does not penetrate the protective brick, there is little possibility of cracking, and the service life can be greatly extended.

[Brief description of the drawings]

FIG. 1 is a partial front view showing an embodiment of a water pipe wall protection structure according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a perspective view showing a protective brick.

FIG. 5 is a partial cross-sectional view showing a conventional water pipe wall protection structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water pipe 2 Fin 3 Bolt 4 Panel brick 7 Nut 8 Plug brick 10 Protective brick 11 Slope 12 Mounting hole 13 Support shaft 14 Anchor stud 15 Anchor member 17 Irregular refractory (plastic refractory)

Claims (2)

(57) [Claims] 1. A trapezoidal cross section having one side surface formed as an inclined surface, and a back portion having a blind hole-shaped mounting hole for fitting to a support shaft protruding from a fin connecting the water tubes. A set of individual protective bricks is provided, and its mounting holes are fitted to the support shaft with a filler such as mortar interposed therebetween so that the side surfaces opposite to the inclined surfaces face each other. Anchor studs are implanted in the fins of the parts facing each other, and an irregular refractory is filled from the fins including the anchor studs to the inclined surface of the protective brick, and the inclined surface is solidified by solidification of the irregular refractory. A water pipe wall protection structure, characterized in that the protection brick is held through a hole. 2. The water pipe wall protection structure according to claim 1, wherein an anchor member such as a chain link is attached to the water pipe at the irregular-shaped refractory filling location.