JP2994924B2 - Checker brick and its construction method - Google Patents

Abstract

PURPOSE:To ensure stability after brick construction and hereby improve a heat transfer efficiency by placing fifth checker bricks on first through fourth checker bricks such that the center thereof is coincident with that of a cylindrical space, and permitting the cylindrical space to be included in an extended area of a cylinder of the fifth checker bricks. CONSTITUTION:In a first stage, four bricks 1 are arranged such that side walls 1 thereof are parallel to each other and the side walls 12 are parallel to each other. A rectangular cross section cylindrical space 30 is formed among these bricks 1 and on the cylindrical space 30 checker bricks 2 of the same structure as that of the bricks 1 are placed such that the center of the bricks 2 is coincident with the center of the cylindrical space 30. Further, just thereabove third stage bricks 1 are placed including an internal cylindrical space 20. Accordingly, the third stage bricks 1 is to include a casing of the second stage bricks 2 so that a cross sectional shape of a space for a gas flow passage is altered from a rectangular shape to an octagonal shape or from an octagonal shape to a rectangular shape to improve a heat transfer efficiency for the chacker bricks 1, 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a checker brick used in a heat storage chamber for an industrial furnace and a method for constructing the same.

[0002]

2. Description of the Related Art Conventionally, various shapes and construction methods of checker bricks of this type have been devised . Initially,
Mainly used rectangular checker bricks have concerns about their stability after construction. Therefore, in recent years, for the sake of stability after construction and reduction of man-hours during construction, for example, Japanese Patent Publication No. 55-4
And large molded brick in the shape of a cross that issue has been disclosed in 5835, such as a box-shaped large molded brick of which are disclosed in Japanese Open Sho 57-161487 JP has come been proposed and used.

The checker brick described in Japanese Patent Publication No. 55-45835 has a central hub portion and four arms extending radially therefrom. In this brick, a cylindrical space having a rectangular cross section is formed between the adjacently disposed bricks, and these spaces serve as gas passages. Each space is constituted by four arms of two adjacent bricks.

[0004] Checker brick according to JP open Sho 57-161487 Patent Publication, though without the rectangular cross section of the cylindrical body, the cylindrical space having a rectangular cross section of the interior of the brick, the disposed adjacent bricks 4 The cylindrical space having a rectangular cross section constituted by the side walls forms a gas flow path. Recently, there is a tendency that this brick is used frequently.

[0005] In the checker brick according to the Japanese Patent Publication 55-45835 and JP-Open Sho 57-161487 discloses the entire wall surface forming a gas flow path thereof bricks contributes to heat transfer. However, the gas flowing through these gas flow paths is essentially a laminar flow, so that there is a problem that further improvement in heat transfer efficiency cannot be expected.

Accordingly, an object of the present invention is to provide a checker brick capable of improving heat transfer efficiency while maintaining sufficient stability after construction, and a construction method thereof.

[0007]

[Means for Solving the Problems]

(1) A checker brick according to the present invention is a checker brick having an octagonal cross section having an open upper end and a lower end, wherein the first and second cylinders are arranged in parallel with each other and have the same shape. A second side wall, third and fourth side walls arranged parallel to each other and having the same shape and orthogonal to the first and second side walls; and the first and third side walls. And between the first and fourth side walls, between the second and third side walls, and between the second and fourth side walls, respectively, having the same shape. A fifth side wall, and when the first, second, third and fourth checker bricks are arranged in an annular shape by contacting the fifth side walls facing each other on the same plane with each other, A cylindrical space with a rectangular cross section is formed between the bricks. When the fifth checker brick is placed on the first, second, third, and fourth checker bricks so that the center thereof coincides with the center of the cylindrical space, the fifth checker brick is formed. The above-mentioned cylindrical space is included in the extension region of the cylindrical body.

The cross-sectional shape of the cylindrical body is preferably the same regular octagon over its entire length, but need not be the regular octagon. This section should be substantially octagonal,
The angle may slightly deviate from the regular octagon due to a dimensional error.

Preferably, a pair of projections are formed on the upper end surface of the cylindrical body at positions facing each other, and a pair of depressions are formed on the lower end surface of the cylindrical body at positions corresponding to the projections, A fifth side wall of the other checker brick is engaged with the pair of protrusions so that the positioning is performed. In this case, there is an advantage that the displacement is less likely to occur when constructing the checker bricks belonging to different stages, and the construction work is facilitated.

[0010] At least one of the first, second, third, fourth and fifth side walls may be formed with a communication hole therethrough. This has the advantage that turbulence is more likely to occur.

The cross-sectional area of the communication hole is generally set to 30% or less of the area of the outer peripheral surface of the side wall, but is preferably in the range of 5 to 15%. This is 1
If it exceeds 5%, a sufficient turbulence promoting effect cannot be obtained, and if it is less than 5%, it is difficult for gas to flow, so that it is difficult to cause branch flow.

The width of the fifth side wall on the outer peripheral surface thereof is preferably in the range of 2.0 to 2.85 times its thickness.
The range of 2.2 times to 2.7 times is more preferable. If it is smaller than 2.0 times, the cross-sectional area of the flow channel becomes too small. For example, the aperture ratio is reduced by about 10% from the optimal value of about 60%. If it is larger than 2.85 times, the gap of the flow path between the checker bricks arranged above and below becomes too large and a gap is generated in the overlapping portion of the checker bricks, so that the stability of the building is insufficient. In the range of 2.2 times to 2.7 times, more efficient turbulence can be obtained.

(2) The method for constructing a checker brick according to the present invention is the first, second, and third aspects of the present invention, which are arranged on the same plane.
And fourth checker bricks are arranged in an annular shape with their opposing fifth side walls in contact with each other, and a cylindrical space having a rectangular cross section is formed between the first, second, third and fourth checker bricks. Forming the fifth, second, third, and fourth checker bricks on the first, second, third, and fourth checker bricks.
Placing the checker brick so that its center coincides with the center of the cylindrical space, further comprising the cylindrical space being included in an extension area of the cylindrical body of the fifth checker brick. Features.

The first, second, third, fourth and fifth checker bricks are preferably formed of a cylinder having the same regular octagonal cross section over the entire length thereof.

Preferably, the first, second, third, fourth
And the fifth checker brick has a pair of projections at positions facing each other on the upper end surface of the cylindrical body, and has a pair of depressions at positions corresponding to the protrusions on the lower end surface of the cylindrical body. The fifth of the fifth checker bricks
Are engaged with the pair of protrusions on the upper end surface of the first, second, third, and fourth checker bricks so that the positioning can be performed. This has the advantage that the construction work becomes easier.

[0016]

According to the checker brick of the present invention and the method for constructing the same, the first, second, third and fourth checker bricks are arranged in an annular shape such that the fifth side walls facing each other on the same plane are in contact with each other. Sometimes, a cylindrical space having a rectangular cross section is formed between the bricks, and when the fifth checker brick is placed so that its center coincides with the center of the cylindrical space, the cylinder of the fifth checker brick is formed. The cylindrical space is included in the extension region of the body. For this reason, a cylindrical space having an octagonal cross section inside the fifth brick, which is larger than the cylindrical space having a rectangular cross section, is located.

Therefore, the cross-sectional shape of the gas flow path changes from a rectangle to an octagon, and the size of the gas flow path increases sharply, so that the gas flowing through the gas flow path pulsates and eddies or turbulent flows are likely to occur. . As a result, the heat transfer efficiency for each checker brick is improved . Furthermore, since the first to fourth checker bricks are arranged with their opposing fifth side walls in contact with each other, they are also excellent in stability after construction.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Explain in detail.  First Embodiment FIGS. 1 and 2 show a checker brick according to a first embodiment of the present invention.
The roof tile and its construction method are shown.

In FIG. 1, the checker brick 1 has eight rectangular plate-shaped side walls 11, 12, 13, 14, 15, 1
6, 17 and 18 are connected to each other and are formed of a cylinder having a regular octagonal cross section. Both the upper and lower ends of the cylindrical body are open, and are flat surfaces (planes perpendicular to the central axis of the cylindrical body). The cylindrical space 20 inside this cylindrical body
Is a gas flow path.

Eight side walls 11, 12, 13, 14, 1
5, 16, 17 and 18 all have the same shape and thickness. Therefore, those inner peripheral surfaces 11a, 12
a, 13a, 14a, 15a, 16a, 17a and 1
8a are rectangles of the same size as each other, and their outer peripheral surfaces 11b, 12b, 13b, 14b, 15b, 16b,
17b and 18b are also rectangles of the same size. Inner peripheral surfaces 11a, 12a, 13a, 14a, 15a,
The rectangles 16a, 17a and 18a have outer peripheral surfaces 11b,
It is smaller than the rectangles 12b, 13b, 14b, 15b, 16b, 17b and 18b.

Side walls 11, 12, 13, 14, 15, 1
6, 17 and 18 outer peripheral surfaces 11b, 12b, 13b,
The width of 14b, 15b, 16b, 17b and 18b is
Each thickness is set to about 2.7 times the thickness. For this reason, as will be described in detail later, when constructing a plurality of bricks 1, when the four bricks 1 are arranged in an annular shape with their mutually facing side walls in contact with each other on the same plane, a cross section between the bricks is obtained. Rectangular cylindrical space (constitutes a part of gas flow path)
Is formed.

Next, the checker brick 1 having the above-described structure will be described.
Will be described with reference to FIG. In FIG. 2, the lower checker brick 1 is indicated by a solid line, and the upper checker brick 2 is indicated by a broken line. The brick 2 has exactly the same configuration as the brick 1.

The arrangement of the checker bricks according to this construction method is configured such that four checker bricks 1 at the first stage (lower stage) and one checker brick 2 at the second stage (upper stage) constitute one unit. You. Therefore, here, the four bricks 1 drawn (hatched) in FIG. 2 and the area surrounded by the four bricks 1 (hatched) are shown.
One brick 2 will be described.

As shown in FIG. 2, in the first stage, the same plane
The four checker bricks 1 are aligned in the same
H (equal intervals) are arranged in an annular shape. In other words, four
The side walls 11 of the brick 1 are parallel to each other, and
Chiefs are arranged parallel to each other. Other side wall 1
The same applies to 3, 14, 15, 16, 17 and 18
It is. At this time, the side walls of the bricks 1 adjacent to each other
Are brought into contact with each other. As a result, these four
A cylindrical space having a rectangular cross section is formed between the bricks 1. This
In the embodiment of the present invention, this cylindrical space is
2 and the side wall 1 of the brick 1 on the left side of FIG.7
2, the side wall 11 of the brick 1 on the lower side of FIG. 2, and the right side of FIG.
And the side wall 13 of the brick 1 located at

The second-stage brick 2 is placed just above the tubular space having a rectangular cross section so that the center of the brick 2 coincides with the center of the tubular space. The orientation of the brick 2 is the same as that of the brick 1. At this time, the side wall 21 of the second-stage brick 2 is located inside the first-stage brick 1 on the upper side in FIG. 2, and the side wall 23 of the brick 2 is located inside the brick 1 on the left side in FIG. The side wall 25 of the brick 2 is located inside the brick 1 on the lower side of FIG. 2, and the side wall 27 of the brick 2 is located inside the brick 1 on the right side of FIG.

Therefore, the inner peripheral surface 2 of the side wall 21 of the brick 2
The lower edge of 1a is located between the upper edge of the inner peripheral surface 15a and the upper edge of the outer peripheral surface 15b of the side wall 15 of the brick 1 below. Similarly, the lower edge of the inner peripheral surface 23a of the side wall 23 of the brick 2 is located between the upper edge of the inner peripheral surface 17a of the side wall 17 of the brick 1 on the left side and the upper edge of the outer peripheral surface 17b. The lower edge of the inner peripheral surface 25a of the side wall 25 of the brick 2 is located between the upper edge of the inner peripheral surface 11a of the lower side wall 11 of the brick 1 and the upper edge of the outer peripheral surface 11b. Inner peripheral surface 27a of side wall 27 of brick 2
Is the inner peripheral surface 1 of the side wall 13 of the brick 1 on the right side.
It is located between the upper edge of 3a and the upper edge of the outer peripheral surface 13b.

The side walls 22 of the brick 2 rest on the contacting side walls 14 and 18 of the two bricks 1 on the upper and left sides of FIG.
Supported by The side wall 24 of the brick 2 rests on and is supported by the mutually contacting side walls 16 and 12 of the two bricks 1 on the left and below in FIG. The side wall 26 of the brick 2 rests on and is supported by the contacting side walls 18 and 14 of the two bricks 1 on the lower and right sides of FIG. Side wall 2 of brick 2
8 rests on the contacting side walls 12 and 16 of the two bricks 1 on the right and upper side of FIG.
Supported by the side walls 12 and 16.

As described above, the side walls 11, 12 of the brick 1
Outer peripheral surface 11 of 13, 14, 15, 16, 17 and 18
b, 12b, 13b, 14b, 15b, 16b, 17b
And 18b each have a width of about 2. Since it is set to 7 times, the arrangement as shown in FIG. 2 is possible.

The overall structure of the bricks 1 and 2 can be described as follows. In the first stage, a plurality of bricks 1 are arranged in the first direction (in FIG. 2, for example, in the left-right direction) at equal pitches, and a plurality of bricks 1 are arranged in the same manner as the first row. It is composed of a second row whose position is shifted in the first direction by (1/2) of the arrangement pitch of one row. In the second stage, a plurality of bricks 2 are arranged on each of the four bricks 1 in a cylindrical space surrounded by any four bricks 1 adjacent to each other in a ring shape.

On this second stage brick 2, a third stage
When constructing each stage of the fourth stage,..., The same arrangement as the first stage is arranged as the third stage on the second stage.
The same as the arrangement of the second stage is arranged as the fourth stage on the stage. Thereafter, the same pattern is repeated as necessary.

As described above, the checker brick 1 of this embodiment is constructed in a form as shown in FIG. 2 so that the first, second, third,... Towards the first place, the first stage 4
The cylindrical space 30 inside the second-stage brick 2 is located directly above the cylindrical space having a rectangular cross section surrounded by the bricks 1, and the four bricks 1 of the third stage are further directly above the cylindrical space 30. A cylindrical space with a rectangular cross section surrounded by is positioned. In the second place, a cylindrical space having a rectangular cross section surrounded by four bricks 2 of the second stage is located just above the cylindrical space 20 inside the first-stage brick 1, Above, the cylindrical space 20 inside the third-stage brick 1 is located.

Therefore, the gas is supplied to the first and second gas.
When flowing upward or downward through the flow path at the location, the cross-sectional shape of the flow path changes from rectangular to octagonal and from octagonal to rectangular, and at the same time, the size of the cross-section of the flow path sharply increases Increase and decrease. For this reason,
The gas flowing through the gas flow path pulsates, eddy or turbulent flow is likely to occur, and the heat transfer efficiency to each checker brick 1 and 2 is improved.

In the above embodiment, the side walls 11, 12, 13, 14, 15, 16, 17 and 18 of the checker brick 1 are used.
Are equal, but they need not be the same. As shown in FIG. 2, the width of the side wall supported by any of the side walls 11, 12, 13, 14, 15, 16, 17 and 18 of the brick 1 at the time of construction is a, and the width of the unsupported side wall is b, the ratio (b / a) of the two is preferably substantially equal to 1, but at least 0.8 ≦ (b
/A)≦1.2.

In the above-described embodiment, the outer peripheral surfaces of the side walls of the bricks 1 adjacent to each other are brought into contact with each other. However, a gap corresponding to the expansion allowance of the brick 1 may be provided between the outer peripheral surfaces.

Second Embodiment FIGS. 3 to 5 show a checker brick according to a second embodiment of the present invention and a construction method thereof. In the second embodiment, there is an advantage that the checker brick is hardly displaced and the construction work is facilitated.

The checker brick 5 of the second embodiment is provided with a pair of projections 51 and 52 on the upper surface and a pair of depressions 53 and 54 on the lower surface to prevent positional deviation during construction. The configuration is the same as that of the checker brick 1 of the first embodiment. The pair of depressions 53 and 54 are located at positions corresponding to the pair of projections 51 and 52, respectively, in other words, at positions immediately below the pair of projections 51 and 52.

As shown in FIGS. 3 and 4A, the projection 51 is formed over the entire side wall 13 and a part of the side walls 12 and 14 adjacent to the side wall 13.
It extends to the center of the side walls 12 and 14, respectively.
The protrusion 52 is formed over the entire side wall 17 and a part of the side walls 16 and 18 adjacent to the side wall 17, and extends to the center of the side walls 16 and 18, respectively. The thickness of these projections 51 and 52 is
3, 14, 16, 17 and 18 have the same thickness.

The depression 53 is formed over the entire side wall 13 and a part of the side walls 12 and 14 adjacent to the side wall 13 and extends to the center of the side walls 12 and 14, respectively. The depression 54 is formed over the entire side wall 17 and a part of the side walls 16 and 18 adjacent to the side wall 17, and extends to the center of the side walls 16 and 18, respectively. The depressions 53 and 54 are formed over the entire thickness of the side walls 12, 13, 14, 16, 17 and 18. The depressions 53 and 54 have shapes that fit into the projections 51 and 52, respectively.

[0039] At the lower end of the side wall 11, 13, 15 and 17, respectively, communicating holes 51d for flowing a gas between the inside and the outside of the brick 5, 5 3 d, 5 5 d and 5 7
d is formed through the side walls 11, 13, 15 and 17. In this case, the communication hole 51d, 5 3 d, 5
5 the shape of d and 5 7 d is semi-circular, side walls 11, 1
3, 15 and 17 are formed so as to be cut out upward from the lower end faces.

The construction method of the checker brick 5 having the above configuration is the same as that of the first embodiment, except that the positioning is performed using the pair of projections 51 and 52 at the time of construction. That is, as shown in FIG.
When the four bricks 5 of the step are arranged in an annular shape, a pair of protrusions 51 and 53 are arranged on two opposing side walls of the four side walls forming the cylindrical region having a rectangular cross section. . The pair of protrusions 51 and 53 are provided with the second-stage brick 6.
A pair of recesses 53 and 54 at the lower end of the pair engage with each other. In this way, no horizontal displacement of the brick 6 occurs during construction.

In the second embodiment, the projections 51 and 52 of the four bricks 5 arranged in the first stage (lower stage) in a ring form
Since the position of the second (upper) checker brick 6 having the same configuration as the brick 5 is determined almost automatically, there is an advantage that the positioning of the brick 6 is easier than in the first embodiment. Furthermore, through the communication hole 5 1 d, 5 3 d, 5 5 d and 5 7 d, since it fluidizing gas is also in between adjacent bricks 1 in the same stage in a high heat transfer efficiency than the first embodiment Is obtained.

In the second embodiment, a pair of projections 51 and 5
Although the cross-sectional shape of each of the pair 2 and the recesses 53 and 54 is substantially rectangular, any other shape can be applied as long as it can prevent displacement of the checker bricks 5 and 6 during construction. The shape and position of the communication hole 51d, 5 3 d, 5 5 d and 5 7 d can be arbitrarily changed, or may be not necessarily provided.

[0043]

According to the checker brick of the present invention and its construction method, the heat transfer efficiency can be improved while maintaining sufficient stability after construction.

[Brief description of the drawings]

FIG. 1 is a perspective view of a checker brick according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing a method of constructing the checker brick of FIG. 1;

FIG. 3 is a perspective view of a checker brick according to a second embodiment of the present invention.

FIG. 4 (a) is a plan view of the checker brick of FIG. 3,
(B) is a front view thereof.

FIG. 5 is an explanatory view showing a method of constructing the checker brick of FIG. 3;

[Explanation of symbols]

1 checker bricks 11, 12, 13, 14, 15, 16, 17, 18 checker brick side walls 11a, 12a, 13a, 14a, 15a, 16a, 1a
7a, 18a Inner peripheral surface of side wall of checker brick 11b, 12b, 13b, 14b, 15b, 16b, 1
7b, 18b Outer peripheral surface of side wall of checker brick 20 Cylindrical space inside checker brick 2 Checker brick 21, 22, 23, 24, 25, 26, 27, 28 Side wall 21a, 23a, 25a, 27a of checker brick the inner peripheral surface 21b of the side walls, 23b, 25b, 27b inside the cylindrical space of the outer peripheral surface 30 checker brick wall of the checker brick 5 checker recess bricks 51, 52 projecting 53,54 5 1 d, 5 3 d , 5 5 d, 5 7 d communication hole 6 checker brick 60 cylindrical space inside checker brick

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F27D 1/04 F27D 1/16 F28D 20/00 C03B 5/237

Claims (8)

(57) [Claims] 1. A checker brick comprising a cylindrical body having an octagonal cross section with an open upper end and a lower end, wherein said cylindrical body is arranged in parallel with each other and has first and second side walls, and Third and fourth side walls arranged parallel to each other and having the same shape and orthogonal to the first and second side walls; and between the first and third side walls; First and fourth
A fifth side wall having the same shape and disposed between the second side wall, the second and third side walls, and the second and fourth side walls, respectively. When the first, second, third and fourth checker bricks are arranged in an annular shape with the fifth side walls facing each other in contact with each other on the same plane, a cylindrical space having a rectangular cross section is provided between the bricks. Are formed, and the first, second, and third
When the fifth checker brick is placed on the fourth checker brick so that the center thereof coincides with the center of the cylindrical space, the cylindrical space extends in the extension area of the cylindrical body of the fifth checker brick. Is included. 2. The checker brick according to claim 1, wherein said cylindrical body has the same regular octagonal cross section over its entire length. 3. A pair of projections are formed on the upper end surface of the cylindrical body at positions facing each other, and a pair of depressions are formed on the lower end surface of the cylindrical body at positions corresponding to the projections. The checker brick according to claim 1, wherein a fifth side wall of the checker brick is engaged with the pair of protrusions to perform the positioning. 4. The first, the second, the third, the fourth and the fifth.
The checker brick according to any one of claims 1 to 3, wherein a communication hole penetrating through at least one of the side walls is formed. 5. The checker brick according to claim 1, wherein a width of the fifth side wall at an outer peripheral surface thereof is in a range of 2.0 to 2.85 times a thickness thereof. 6. The first, second, third and fourth checker bricks according to claim 1 are annularly arranged on the same plane with their opposing fifth side walls in contact with each other. Forming a cylindrical space having a rectangular cross section between the first, second, third and fourth checker bricks; and forming the first, second, third and fourth checker bricks on the first, second, third and fourth checker bricks. Mounting a fifth checker brick having the same configuration as the first, second, third, and fourth checker bricks so that the center thereof coincides with the center of the cylindrical space. A method of constructing a checker brick, wherein the checker brick is included in an extension area of a cylindrical body of the fifth checker brick. 7. The first, the second, the third, the fourth and the fifth.
7. The method for constructing a checker brick according to claim 6, wherein the checker brick is formed of a cylindrical body having the same regular octagonal cross section over its entire length. 8. The first, second, third, fourth and fifth aspects.
The checker brick has a pair of protrusions at positions facing each other on the upper end surface of the cylindrical body, and has a pair of depressions at a position corresponding to the protrusion on a lower end surface of the cylindrical body, The fifth checker brick is positioned by engaging a fifth side wall of the fifth checker brick with the pair of protrusions on the upper end surface of the first, second, third and fourth checker bricks. 3. A method for constructing a checker brick according to item 1.