JP2781353B2 - Construction method and apparatus of prefabricated block for industrial kiln - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for installing a prefabricated block for an industrial kiln.

[0002]

2. Description of the Related Art In refractory furnaces and other industrial kilns, refractories are installed on the inner wall of the furnace and on the furnace ceiling.
Mainly in order to rationalize the construction of the furnace ceiling, anchor bricks such as anchor bricks or anchor hardware are arrayed and buried inside using an irregular-shaped refractory to a predetermined size (normally 1600).
Construction using a refractory prefabricated block (hereinafter, simply referred to as a prefabricated block) formed into a block by forming it into a size of about × 600 (mm) has been put to practical use.

[0003] In the conventional construction of a furnace ceiling using the above prefabricated block, as shown in Fig. 10, prefabricated blocks 1, 1, ... and a ceiling frame 2 are previously integrated, and
The ceiling frame 2 is lifted and erected over the side walls 3 and 3 of the furnace. This lifting is performed by an overhead traveling crane in a factory having overhead traveling crane equipment, or by using a truck crane when there is no overhead traveling crane equipment. It is common practice to carry out by passing.

[0004]

However, in the above-mentioned conventional construction, there is no special problem because there are no other obstacles when the furnace is newly installed. However, when the furnace ceiling is repaired, the prefabricated block is removed together with the ceiling frame. In addition, a ceiling frame with a newly assembled prefabricated block must be stretched between the furnace walls 3 and 3, so that existing items such as building accessories and other ducts above the furnace become obstacles, and Even if there is a crane equipment, it is difficult to use it, and even if you try to use a truck crane, it can not be installed unless there is a large space above the furnace as a hanging allowance, and near the furnace If there is not enough space to install a truck crane, construction cannot be performed. Even if these cranes could be used, there were various problems such as the driver's seat of the cranes being separated from the ceiling construction part, which made it difficult to mount the ceiling frame 2 and involved dangers. .

On the other hand, the prefabricated blocks 1 are filled in order to prevent gas leakage from the joints between the prefabricated blocks 1, 1,. However, there is a problem that the sealing material easily falls off and gas leaks easily occur.

SUMMARY OF THE INVENTION In view of the foregoing, an object of the present invention is to facilitate construction using a prefabricated block, and there is no need for a seal material between prefabricated blocks to fall off after construction and no industrial gas leakage. An object of the present invention is to provide a method and an apparatus for constructing a prefabricated block for a kiln.

[0007]

According to the present invention, as a means for solving the problems of the above prior art, a suspending member made of a pipe or the like is arranged at a predetermined interval above the furnace.
An elevating device is installed below the elevating device, an inclining jig is installed on the elevating device, a refractory prefabricated block is placed thereon, and the elevating device is operated to elevate and then the inclining jig is fixed. Tilting the angle, attaching the hanging part of the refractory prefabricated block to the hanging member, constructing the furnace ceiling, and a method for constructing a prefabricated block for an industrial kiln, And a tilting jig mounted on the elevating device. The tilting jig includes a base, a prefabricated block mounting base pivotally supported at one end of the base, and a mounting base. A prefab for an industrial kiln, comprising a free end of a mounting table and a jack for connecting the base, wherein the prefabricated block on the mounting table is inclined at a desired angle by extending the jack. Construction of blocks To provide a location.

[0008]

[Function] For furnace ceiling construction using a prefabricated block, a lifting device is carried into the hearth, and a tilting jig with the prefabricated block mounting table in a horizontal state is mounted on the upper part of the lifting device. One prefabricated block is placed on the floor, and then the lifting device is raised and raised to a predetermined height position, and then the jack of the tilting jig is extended to give the mounting table an inclination required for furnace ceiling construction, This causes the prefabricated block to also tilt accordingly. In this state, the suspension unit of the prefabricated block is attached to a suspension member previously arranged at a position above the furnace, and the lifting device and the tilting jig are sequentially arranged so as to be suspended by the suspension member. While raising and lowering, attach the prefabricated block to the hanging member and arrange it,
The sealing material is filled into the gap between the side joining surfaces from above. If this gap is formed so as to expand upward by the tapered surface of the side surface of the prefabricated block, the sealing material filling this gap will not fall down from between the prefabricated blocks due to the presence of a wedge-shaped sealing material. According to the fourth aspect, the prefabricated block can be constructed in a state of no gas leak by mounting the prefabricated block by pressing the side end faces thereof to each other.

[0009]

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 prefabricated block 4 used in the present invention.
FIG. 2 shows a cross-sectional view in which a part of the embodiment is cut away.

The block body 5 of the prefabricated block 4
Has a substantially rectangular parallelepiped shape with a rectangular planar shape and a required thickness. For example, a long side is about 1200 mm, and a short side is 670 mm.
mm, thickness 290 mm, the side facing the inside of the furnace (heating surface side) is castable 6 (220 mm thickness), and the back side is fireproof heat insulating material 7 (25 mm thickness) having a specific gravity of 0.1 to 0.3. Is a heat-insulating castable 8 (45 mm) with a specific gravity of 0.8 to 1.3.
), And a required number of anchoring members 9, 9...

A joining surface 5a at the side of the block main body 5,
As shown in FIG. 3, 5a has a tapered surface which forms a gap 10 which expands upward when adjacent to each other. This taper has a thickness of 10 to 2 within the range of the thickness of the castable 6.
The gradient is 0 mm.

FIGS. 1 to 3 show a case where an anchor brick is used as the hanging anchor member 9. When the block body 5 has the above dimensions, a total of eight anchor bricks in two columns and four rows are used. The jaw 9a at the upper end thereof protrudes from the surface of the refractory heat insulating material 7 by about 60 mm.
, And suspension members 11, 1 such as pipes arranged in the upper part of the furnace so as to match the arrangement interval of the anchor members 9, 9,.
.. Are suspended by using suspension fittings 12, 12,. The configuration of the anchor brick itself is similar to that of the existing bricks, in which the ridges 9b and 9c are formed on the peripheral surface.

The hanging anchor member 9 is not limited to an anchor brick. For example, Y-shaped studs 13 are used as shown in a cross section in FIG. 4, and the studs are formed into Y-shaped studs as shown in FIG. The directions of the leg portions 13a, 13a are alternately 9
There may be a case where it is embedded in the block main body 5 so as to be different by 0 °. In addition, the suspension anchor member 9 and the suspension member 1
3 can be used, or a suitable hanging metal fitting such as a hook structure shown in FIG. 4 can be used. You may.

As shown in FIG. 6, a construction device used for constructing the prefabricated block 4 on the ceiling of a furnace includes a movable lifting device 14 and a tilting device mounted on the upper portion of the lifting device 14. It comprises a jig 15.

The elevating device 14 uses an X lifter. The lower portion has wheels 16 for smooth movement, and the upper portion has a jig table 17. The lifting device 14 may be a lifting platform using a hydraulic jack or any other suitable structure.

As shown in FIG. 7, the tilting jig 15 has a base 18 large enough to be mounted on a jig table 17 of the elevating device 14, and a shaft 19 tilts at one end of the base 18. A prefabricated block mounting table 20 that is freely pivotally supported, and a jack 21 that connects the free end of the mounting table 20 to the base 18.
(Hydraulic pressure, pneumatic operation), and the extension of the jack 21 causes the prefabricated block 4 on the mounting table 20 to be tilted to a desired angle, that is, an angle that matches the tilt angle of the suspension members 11, 11,. It has become. The base 1
In the lower part of the wheel 8, wheels 22, 22... (Casters) for adjusting the position on the jig table 17 of the lifting device 14 are provided.

Therefore, in order to construct the ceiling of the furnace using the prefabricated block 4, as shown in the construction process in FIG. 6, an elevator 14 is carried into the hearth and the elevator 14 is repaired. Place the tilting jig 15 on the mounting table 17,
One prefabricated block 4 is mounted on the prefabricated block mounting table 20 of the jig 15.

Next, the lifting device 14 is connected to the prefabricated block 4.
Is moved to the place to be mounted, the lifting device 14 is raised, and the tilting jig 15 is lifted to a predetermined height position.
Subsequently, the jack 21 of the tilting jig 15 is extended and the mounting table 20 is tilted at an angle suitable for construction, whereby the prefabricated block 4 is also tilted at a corresponding angle.

In this state, the anchor members 9, 9... Of the prefabricated block 4 are attached to the hanging members 11, 11.
The prefabricated block 4 is suspended by the suspension member 11 by being attached by 2, 12,.

In this manner, the prefabricated blocks 4 are suspended one by one on the suspension member 11 while the lifting device 14 and the tilting jig 15 are sequentially raised and lowered.

The sides of the prefabricated blocks 4, 4... Suspended in an array as described above are tapered at the side joining surface 5a of the block body 5 of the prefabricated block 4, as shown in FIG. An interval 10 in which the upper portion expands is formed, and a sealing material 23 such as a castable containing ceramic fiber material is filled into the interval 10 from above. Therefore, after the sealing material 23 is cured, the sealing material 23 becomes wedge-shaped, intervenes between the prefabricated blocks 4, 4,... And does not fall down.

FIG. 8 is a cross-sectional view showing another example of a prefabricated block when the ceiling is constructed by the above construction method. The prefabricated block 4A is made of iron having a size similar to that of the prefabricated block 4 (for example, 1260 × 1000 mm). Leather 2
4 are fixed to one surface by welding, and ceramic fiber blocks 26, 26,... Are attached using the anchor hardware 25, 25 as anchors, and on the heating surface side of the ceramic fiber blocks 26, 26,. Is coated with a ceramic fiber veneer ring 27 if necessary.

A flange 24 is provided on the periphery of the steel shell 24.
a, 24a are raised, and the flanges 24a, 24a of the adjacent prefabricated blocks 4A are fastened with bolts to be connected. The ends of the ceramic fab blocks 26, 26 are attached so as to slightly protrude from the peripheral edge of the steel shell 24. When the adjacent prefabricated blocks 4A are connected as described above, the ceramic fiber blocks 26 are connected to each other. It is configured to be in a pressure contact state.

On the outer surface of the steel shell 24, the hanging member 1
Required number to attach to 1, 11 ... (4 in the embodiment)
Are provided. The hanging portion 28 in this example is formed by a flange 31 at the lower end of a hanging metal fitting 30 having an inverted L-shape on the upper surface of a base portion 29 welded to the steel shell 24.
Are attached by four bottles 32, 32,..., And a U-shaped support
3 are inserted through the left and right legs 33a, 33a.
The nuts 34, 34 are screwed into the threaded portions 3a, 33a so that the nuts 34, 34 can be fastened to the suspension member 11 inserted into the support fitting 33. By setting the bottle insertion hole of the flange 31 to be an elongated hole, even if there is a slight shift in the position between the hanging portion 28 and the hanging member 11, it is possible to prevent the mounting from being hindered.

The construction of the furnace ceiling using the prefabricated block 4A can also be performed by the construction apparatus used in the case of the prefabricated block 4. That is, the prefabricated block 4A is placed on the tilting jig 15 placed on the jig mounting table 17 of the elevating device 14 with the steel bar 24 facing upward, and the prefabricated block 4A is raised by the elevating device 14 so that the tilting jig 15 is fitted to the ceiling inclination. The mounting table 20 is tilted by the jack 21, and the support bracket 33 of the suspension section 28 is fitted to the suspension member 11 from below, and then its legs 33 a, 33 a
Is inserted into the bottle hole of the horizontal portion 30a from below the hanging bracket 30 and fastened with nuts 24, 24. Then, the flange 31 of the hanging bracket 30 and the prefabricated block 4A
The prefabricated block 4A can be attached by fixing the fixed base portion 29 to the iron shell 24 with bolts 32, 32.

The prefabricated block 4 thus mounted
A are bonded to each other by elasticity of the ceramic fiber blocks 26, 26, and can be attached without any gap.

FIG. 9 shows the arrangement thereof. In FIG. 9, reference numerals 35, 35... Denote holes for inserting burners, and a prefabricated block 4 for forming the holes 35.
, 4B,... Are recessed at both ends into a shape corresponding to one half of the shape of the hole 35. The prefabricated blocks 4C, 4C,...
A is set to a half width of A.

In the above description of the operation, the suspending member 1
Although the construction of the prefabricated block on the inclined ceiling portion where 1, 11,...
In the case of installation on a horizontal ceiling portion arranged horizontally, it is only necessary to use only the lifting / lowering device 14 without using the tilting jig 15, and to mount the tilting jig 15 on the vertical
The prefabricated block mounting table 20 may be used in a horizontal state while being mounted thereon.

[0030]

As described above, according to the present invention, the prefabricated block is supported in an inclined state in accordance with the inclination of the suspending member disposed at the upper part of the furnace. Since the holding anchor member can be attached to the suspending member by the suspending bracket, even a heavy prefabricated block can be easily attached, and the construction can be performed efficiently and safely.

[0031]

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a prefabricated block used in the present invention.

FIG. 2 is a partially cutaway sectional view of the same.

FIG. 3 is an enlarged sectional view of a joint portion of the prefabricated block.

FIG. 4 is a cross-sectional view of a prefabricated block showing an example when another suspension anchor member is used.

FIG. 5 is an exemplary view showing an arrangement of a suspension anchor member.

FIG. 6 is a perspective view showing the state of construction of the prefabricated block of FIG. 1;

FIG. 7 is a perspective view of a tilting jig.

FIG. 8 is a sectional view showing another example of a prefabricated block used in the construction method of the present invention.

FIG. 9 is a plan view showing an example of the arrangement.

FIG. 10 is an explanatory view showing a conventional technique.

[Explanation of symbols]

 4, 4A, 4B, 4C Prefab block 5 Block main body 6 Castable 7 Fireproof heat insulating material 8 Heat insulating castable 9 Suspended anchor member 10 Gap 11 Suspended member (pipe) 12 Suspended metal fitting 13 Stud 14 Elevating device 15 Tilting jig DESCRIPTION OF SYMBOLS 17 Jig mounting table 20 Prefab block mounting table 21 Jack 23 Sealing material 24 Iron skin 25 Anchor member 26 Ceramic fiber block 27 Veneering 28 Suspension unit 30 Suspension bracket 33 Support bracket

Continued on the front page (72) Inventor Hidenori Yamaguchi 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Nippon Kokan Co., Ltd. (72) Inventor Hiroyuki Kamoda 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Japan (56) References JP-B-33-9553 (JP, B1) (58) Fields investigated (Int. Cl. ⁶ , DB name) F27D 1/00-1/18

Claims (4)

(57) [Claims] 1. A suspending member made of a pipe or the like is arranged at a predetermined interval above the furnace, a lifting device is installed below the hanging member, and an inclination jig is installed on the lifting device. Then, the refractory prefabricated block is placed thereon, the elevating device is moved up and down, and then the tilting jig is tilted at a predetermined angle, and the hanging part of the refractory prefabricated block is attached to the hanging member, A method for constructing a prefabricated block for an industrial kiln characterized by constructing. 2. The method for constructing a prefabricated block for an industrial kiln according to claim 1, wherein the side joint surfaces of the block main body of the refractory prefabricated block are tapered surfaces that expand upward when they are adjacent to each other. 3. The prefabricated refractory block according to claim 1, wherein a ceramic fiber block having or not having a ceramic fiber veneer ring on a heating surface side is arranged and fixed via an anchor member to a steel shell, and the hanging member is mounted on an outer surface of the steel shell. The method for constructing a prefabricated block for an industrial kiln according to claim 1 or 2, further comprising a suspending portion attached to the prefabricated block. 4. An elevating device and an inclining jig mounted on the elevating device. The inclining jig is pivotally supported by a base and one end of the base so as to be tiltable. A prefabricated block mounting table, and a jack connecting the free end of the mounting table and the base, and the prefabricated block on the mounting table is inclined at a desired angle by extending the jack. Characteristic prefab block construction equipment for industrial kilns.