JP3195118U - Checker brick hardware and hot stove - Google Patents

Abstract

Provided are a checker brick receiving hardware and a hot stove that have sufficient ventilation performance and strength and can reduce the manufacturing cost. A checker brick receiving hardware includes a hardware main body 33 and a support column that supports the hardware main body 33. A plurality of hardware vent holes 333 are formed through the hardware body 33. One opening 334 of the plurality of metal vent holes 333 has a size that can be opposed to at least two of the plurality of brick vent holes 311 formed in the checker brick 31. The other opening 335 of the plurality of metal vent holes 333 has an opening area smaller than the opening area of the opening 334. [Selection] Figure 2

Description

  The present invention relates to a checker brick receiver and a hot stove for supporting checker bricks in a heat storage chamber of a hot stove for supplying hot air to a blast furnace.

Conventionally, a hot stove has been used as equipment for supplying hot air to a blast furnace for iron making.
A plurality of hot blast furnaces (3 to 5) are installed per blast furnace, and heat is stored in one of them, and the hot blast furnace is supplied to the blast furnace so that hot air can be continuously supplied to the blast furnace. It has become.
Each hot stove has a combustion chamber in which a burner for heating is installed, and a heat storage chamber filled with checker bricks as a heat storage medium. And as a heat storage operation | movement, a fuel is burned in a combustion chamber, a hot air is produced | generated, this hot air is passed through a heat storage chamber, and heat is stored in the checker bricks piled up inside the heat storage chamber. Further, as a blowing operation, the outside air is heated through the heat storage chamber, and hot air heated to about 1200 ° C. to 1400 ° C. is supplied to the blast furnace.
In addition, there is a method of preheating the combustion air for hot stove to about 500 ° C to 600 ° C by using about 2 separate small hot stoves in order to exclusively burn the blast furnace gas. The combustion / heat storage system is the same as that of the hot stove.

As such a hot stove, for example, a hot stove described in Patent Document 1 has been proposed.
The hot stove described in Patent Document 1 is an external combustion type in which a combustion chamber and a heat storage chamber are provided in different furnace bodies. A checker brick as a heat storage medium is provided in the heat storage chamber. The checker bricks are stacked without any gap from the bottom of the heat storage chamber furnace body to the vicinity of the top of the furnace. The checker bricks are stacked such that a large number of brick ventilation holes are formed therethrough, and the brick ventilation holes communicate with each other. Therefore, in many stacked checker bricks, the heat storage chamber furnace body can be ventilated from the furnace bottom part to the furnace top part.

An intake port and an exhaust port that are open to the outside are formed in the furnace bottom portion of the heat storage chamber furnace body. A checker brick receiving hardware that supports the checker brick is provided inside the furnace bottom portion of the heat storage chamber furnace body.
The checker brick receiving hardware is a structure composed of a horizontally extending hardware body and a support (frame) that supports the hardware body. The metal main body is made of flat cast iron or cast steel as a material, and a plurality of metal vent holes are formed through vertically. The metal vents are arranged in pairs so as to communicate with the brick vents. For this reason, intake / exhaust between the checker brick and the outside is made possible through the metal vent.

JP 2006-22381A

  In order to improve the heat storage efficiency in the heat storage chamber, when the number of brick vents per area is increased and the interval between brick vents is reduced, the number of brick vents and the number of hardware vents relative to these intervals It is necessary to correspond these intervals. At this time, if the metal vent holes are formed to have the same diameter as the brick vent holes, a large number of small-diameter metal vent holes that are close to each other with respect to the checker brick receiving hardware are formed, which increases the difficulty of casting production. Moreover, the difficulty of casting production becomes higher as the interval between the metal vents becomes narrower. For this reason, it is difficult to reduce the manufacturing cost.

  Here, if the diameter of the metal ventilation hole is increased, the hole processing is facilitated and the difficulty of casting production can be reduced. However, if the diameter of the metal vent hole is increased without reducing the number, the material constituting the metal body is excessively reduced, the bending strength of the checker brick receiving hardware against the checker brick is lowered, and the checker brick is supported at a high temperature. Therefore, there is a possibility that sufficient strength cannot be maintained. In order to ensure strength, it is necessary to increase the thickness of the checker brick receiving hardware. However, increasing the thickness of the hardware makes it difficult to reduce the manufacturing cost. Also, if the material itself is changed to a higher one, the production cost will increase.

  An object of the present invention is to provide a checker brick receiver and a hot stove that have sufficient ventilation performance and strength and can reduce manufacturing costs.

  A checker brick receiver according to the present invention is a checker brick receiver for supporting a checker brick provided in the heat storage chamber of a hot stove provided with a combustion chamber and a heat storage chamber, the hardware main body extending horizontally, A support body for supporting the hardware body, wherein the hardware body has a plurality of metal ventilation holes formed therein, and one opening of the plurality of hardware ventilation holes has a plurality of brick passages formed in the checker brick. The size is such that at least two of the pores can be opposed to each other, and the other opening of the plurality of hardware vents has an opening area smaller than the opening area of the one opening.

According to the checker brick receiving hardware of the present invention, one opening having a size capable of including at least two brick vent holes is disposed opposite to the at least two brick vent holes. For this reason, intake and exhaust to at least two brick ventilation holes can be performed through one hardware ventilation hole. Moreover, while being able to expand one opening with respect to a brick vent hole, the number of metal vent holes can be reduced. For this reason, the difficulty of casting production can be lowered, and the production cost can be reduced.
Moreover, by making the opening area of the other opening smaller than the opening area of one opening, it is possible to suppress the excessive reduction of the constituent materials constituting the hardware main body, and it is necessary to increase the metal thickness of the checker brick receiving hardware. The production cost can be reduced. Furthermore, the strength on the other opening side where the bending stress due to the load of the checker brick is maximized can be secured.

In the checker brick receiving hardware of the present invention, it is preferable that one adjacent opening of the plurality of hardware ventilation holes is arranged at a constant interval.
According to such a configuration, one adjacent opening is disposed at a constant interval, so that the interval between the openings is not partially reduced. For this reason, the strength on the checker brick side of the checker brick receiving hardware can be made uniform, the life can be extended, and the support stability of the checker brick can be improved.

In the checker brick receiver of the present invention, the one opening is preferably formed in a triangular shape, a quadrangular shape, or a hexagonal shape.
According to such a configuration, by arranging each corner portion of one opening so as to face the brick vent hole, the area of the portion between the corner portions does not become excessively large, and a plurality of brick vent holes are provided. Can be merged.
Here, the number of brick ventilation holes joined at one opening may be two, three, four, five or more.

In the checker brick receiving hardware of the present invention, it is preferable that one opening of the plurality of hardware ventilation holes is formed in a triangular shape, and one opening adjacent to each other is alternately arranged in the opposite direction.
According to such a configuration, for example, the interval between the openings adjacent to each other can be made constant, and the interval is not partially reduced. Therefore, the strength of the checker brick receiving hardware can be made uniform.

In the checker brick receiving hardware of the present invention, one opening of the plurality of hardware vents has a concave portion and a convex portion, respectively, and the convex portion of the one opening is adjacent to the one opening. It is preferable to face the concave portion of one of the openings.
According to such a configuration, the convex portions of the one opening or the concave portions are not arranged to face each other, and the interval between the one opening can be made constant.
Moreover, by providing the concave portion, the area other than the portion facing the brick ventilation hole is reduced, and the constituent material of the hardware main body can be increased. Therefore, the strength of the checker brick receiving hardware can be increased.

In the checker brick receiving hardware of the present invention, it is preferable that the plurality of hardware ventilation holes have a shape that decreases from one opening side toward the other opening side.
According to such a configuration, one opening having a large opening area and the other opening having a small opening area can be continuously formed.

The hot air furnace of the present invention includes a combustion chamber and a heat storage chamber for storing hot air from the combustion chamber, and the heat storage chamber supports the checker brick having a plurality of brick vent holes and the checker brick. The checker brick receiver of the present invention described above is provided.
According to the present invention as described above, the same operational effects as those of the checker brick receiving hardware of the present invention described above can be exhibited.

  ADVANTAGE OF THE INVENTION According to this invention, while providing sufficient ventilation performance and intensity | strength, a checker brick receiving metal object and a hot stove which can reduce manufacturing cost can be provided.

The schematic diagram which shows the hot stove concerning 1st Embodiment of this invention. Sectional drawing which shows a part of checker brick and checker brick receiving metal fittings of the hot stove furnace according to the first embodiment. In the said 1st Embodiment, the schematic diagram which shows one surface of a checker brick receiving metal object by the III-III line in FIG. In the said 1st Embodiment, the schematic diagram which expands and shows one surface of a checker brick receiving metal object. The said 1st Embodiment WHEREIN: The schematic diagram which shows the other surface of a checker brick receiving metal object by the VV line in FIG. The schematic diagram which shows one opening of the vent hole of the checker brick receiver of the hot stove furnace which concerns on 2nd Embodiment of this invention. The schematic diagram which shows one opening of the vent hole of the checker brick receiver of the hot stove furnace which concerns on the modification of this embodiment. The schematic diagram which shows one opening of the vent hole of the checker brick receiver of the hot stove furnace which concerns on the modification of this embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
[Configuration of First Embodiment]
The hot stove 1 according to the first embodiment of the present invention is one of a plurality of installed hot blast furnaces per blast furnace. As shown in FIG. 1, the hot stove 1 is an external combustion type in which a combustion chamber and a heat storage chamber are separated, and has two furnace bodies, a combustion chamber furnace body 2 and a heat storage chamber furnace body 3. .

A heating burner 21 is formed at the furnace bottom portion inside the combustion chamber furnace body 2. The burner 21 mixes and burns the fuel gas introduced into the fuel gas introduction part 22 and the air introduced into the air introduction part 23, and generates high-temperature combustion gas that flows toward the top of the furnace.
On the side surface of the combustion chamber furnace body 2, a hot air supply unit 24 leading to the blast furnace is installed. The combustion chamber furnace body 2 is connected to the furnace top portion of the heat storage chamber furnace body 3 by a connecting pipe 25.

  Inside the heat storage chamber furnace body 3, checker bricks 31 as heat storage media are supported by the checker brick receiver 32, and are stacked without gaps from the bottom of the heat storage chamber furnace body 3 to the vicinity of the furnace top. An intake port 35 and an exhaust port (not shown) that are open to the outside are formed in the furnace bottom portion of the heat storage chamber furnace body 3. The exhaust port is arranged in parallel with the intake port 35 in the circumferential direction of the heat storage chamber furnace body 3.

As shown in FIG. 2, the checker bricks 31 are each formed with a large number (for example, about 37) of brick vent holes 311 penetrating vertically and formed in a hexagonal shape in plan view as shown by a one-dot chain line in FIG. Yes. The vertical thickness dimension of the checker brick 31 is about 100 mm to 150 mm. The brick ventilation holes 311 have a hole diameter of about 20 mm to 45 mm, and are arranged in a large number in a lattice shape.
A plurality of checker bricks 31 are arranged in a grid pattern in the horizontal direction, and are stacked up to a height of 20 to 30 m so that the brick ventilation holes 311 communicate with each other. Therefore, in many stacked checker bricks 31, the heat storage chamber furnace body 3 can be ventilated from the furnace bottom part to the furnace top part.

  As shown in FIG. 1, the checker brick receiver 32 is provided at the furnace bottom portion inside the heat storage chamber furnace body 3. The checker brick receiving hardware 32 includes a hardware main body 33 extending horizontally and a plurality of pillars 34 as a support for supporting the hardware main body.

  The metal main body 33 is made of flat cast iron or cast steel, and is provided in a plate shape at the furnace bottom portion inside the heat storage chamber furnace body 3. The thickness dimension in the vertical direction of the hardware main body 33 is about 300 to 600 mm. An upper surface 331 (one surface) of the hardware main body 33 is in contact with and supported by the lower surface of the checker brick 31. A lower surface 332 (the other surface) of the hardware main body 33 is supported by the support column 34.

  As shown in FIG. 2, a plurality of hardware vent holes 333 are formed in the hardware body 33 so as to penetrate vertically. The number of the metal vent holes 333 is about 1/3 of the number of the brick vent holes 311. The metal vent 333 is formed to extend in the vertical direction from the upper surface 331 on the checker brick 31 side to the lower surface 332 on the anti-checker brick 31 side. The metal vent 333 includes an opening 334 formed on the upper surface 331, an opening 335 formed on the lower surface 332, and a constricted portion 336 configured to have a shape that shrinks between the openings 334 and 335. Yes.

As shown in FIGS. 3 and 4, the opening 334 has a substantially triangular shape, and the three corners thereof are arc-shaped protrusions formed in a convex shape outward from the center O of the metal vent hole 333 in the horizontal direction. 334A. The curvature of the convex portion 334 </ b> A is equally formed corresponding to the curvature of the brick vent hole 311 of the checker brick 31.
The three side portions located between the three convex portions 334A are arc-shaped concave portions 334B formed in a concave shape from the center O of the metal vent hole 333 toward the outer side in the horizontal direction. The curvature of the concave portion 334B is set to be moderately smaller than the curvature of the convex portion 334A.
The opening 334 that is curved in this way has an opening area to the extent that it is opposed to the three brick ventilation holes 311 adjacent to each other. The three convex portions 334A are disposed to face the three brick ventilation holes 311 adjacent to each other.

  The plurality of openings 334 are arranged in a lattice pattern on the upper surface 331. As shown in FIG. 3, the plurality of openings 334 are arranged in a horizontal direction along the upper surface 331 and an array A1 in which the openings 334 are arranged in the positive direction in the A direction as an arbitrary direction, and an opening in the A direction. 334 is divided into an array A2 arranged 180 degrees reverse. The openings 334 constituting the array A1 are arranged in the same positive direction. The openings 334 constituting the array A2 are arranged in the same reverse direction. The arrays A1 and A2 are alternately arranged in the horizontal direction along the upper surface 331 and in the B direction orthogonal to the A direction. Therefore, the array of the plurality of openings 334 in the B direction is an array B1 in which the openings 334 are alternately arranged in opposite directions.

In the array A1, one convex portion 334A (corner portion) of the opening 334 is disposed to face the concave portion 334B (side portion) of another opening 334 adjacent to the opening 334 with a gap L1 therebetween. Yes. The curvature center C of the convex portion 334A is at a position equal to the curvature center C of the concave portion 334B facing the convex portion 334A in the A direction. For this reason, the space | interval L1 between the said convex-shaped part 334A and the concave-shaped part 334B is equalized, and becomes a fixed space | interval. Further, the radius RS of the convex portion 334A is shorter than the radius RL of the concave portion 334B facing the convex portion 334A in the A direction.
In the array A2, the relationship between the distance L1 between the convex portions 334A and the concave portions 334B of the two openings 334 facing each other and the position of the center of curvature C is the same as the relationship between the convex portions 334A and the concave portions 334B in the array A1 described above. It is the same.

In the array B1, the convex portions 334A and the concave portions 334B of the two openings 334 are arranged to face each other with an interval L1. The centers of curvature C of the convex portion 334A and the concave portion 334B are at the same position. For this reason, the space | interval L1 between the said convex-shaped part 334A and the concave-shaped part 334B is the uniform fixed space | interval. Further, the radius RS of the convex portion 334A is shorter than the radius RL of the concave portion 334B facing the convex portion 334A in the B direction.
The radiuses RS of the convex portions 334A described above are equal in length, and the radii RL of the concave portions 334B described above are equal in length.
As described above, the openings 334 adjacent to each other are arranged at a constant interval L1 (hole pitch) of about 13.5 mm to 25 mm. Further, the center of curvature C of each convex portion 334 </ b> A disposed to face the brick vent hole 311 substantially coincides with the center of the brick vent hole 311.

As shown in FIG. 5, the opening 335 is formed in a circular shape with the center O of the metal vent hole 333 as the center of curvature. The opening 335 has an opening area smaller than the opening area of the opening 334. Since the arrangement of the plurality of openings 335 is substantially the same as the arrangement of the openings 334 described above, the description thereof is omitted. However, since the opening 335 has a circular shape, the shape appearing on the lower surface 332 does not change regardless of whether the opening 335 is facing forward or backward.
As shown in FIG. 4, the periphery of the opening 335 overlaps the portion of the concave portion 334 </ b> B of the opening 334 that is closest to the center O.
The interval between the plurality of openings 335 configured in this way is larger than the interval L1 between the openings 334 described above. For this reason, the amount of the constituent material of the hardware main body 33 is increased on the lower surface 332 side where the bending stress from the checker brick 31 becomes maximum.

As shown in FIG. 2, the constricted portion 336 is provided above ½ of the thickness dimension of the hardware main body 33.
The upper portion 336A of the constricted portion 336 is connected to an upper ventilation space 337 extending downward from the opening 334. The periphery of the upper portion 336A has the same shape as the periphery of the opening 334. The outer shape of the upper ventilation space 337 is the same shape as the outer shape of the opening 334.
The lower portion 336B of the constricted portion 336 is connected to a lower ventilation space 338 extending upward from the opening 335. The periphery of the upper portion 336A has the same shape as the periphery of the opening 335. The outer shape of the lower ventilation space 338 is the same shape as the outer shape of the opening 335.

The opening area of the upper part 336A is larger than the opening area of the lower part 336B. The overall shape of the constricted portion 336 is formed in a tapered shape from the upper portion 336A to the lower portion 336B.
On the upper part 336A side, it is formed in a substantially triangular shape corresponding to the opening 334, but gradually deforms into a circular shape toward the lower part 336B, and has a shape corresponding to the opening 335.

  A plurality of support columns 34 are erected on the furnace bottom of the heat storage chamber furnace body 3, and support the lower surface 332 of the hardware main body 33 directly or via a girder. The gaps between the plurality of support posts 34 are configured as air passages through which the brick vent hole 311, the intake port 35, and the exhaust port pass through the metal vent hole 333.

[Operation of First Embodiment]
Hereinafter, the operation of the hot stove 1 of the present embodiment will be described.
In the hot stove 1, heat storage and ventilation are performed as follows.
In the heat storage operation, the fuel gas is burned by the burner 21 to generate the combustion gas that rises in the combustion chamber furnace body 2, and this combustion gas is introduced into the heat storage chamber furnace body 3 from the connecting pipe 25. Then, the introduced combustion gas is passed downward through the checker brick 31, and the heat of the combustion gas is stored in the checker brick 31 during that time. The combustion gas that has passed through the checker brick 31 is discharged from the exhaust port through the checker brick receiver 32.

  During the air blowing operation, outside air is sucked into the heat storage chamber furnace body 3 through the air inlet 35, and the sucked outside air is passed upward through the checker brick receiving metal 32 and through the checker brick 31, between them. The outside air is heated by the heat stored in the checker brick 31 to generate hot air, and this hot air is introduced from the connecting pipe 25 into the combustion chamber furnace body 2 and supplied from the hot air supply unit 24 to the blast furnace.

[Effect of the first embodiment]
(1) Since the opening 334 having a size capable of including the three brick ventilation holes 311 is disposed opposite to the three brick ventilation holes 311, intake and exhaust to the three brick ventilation holes 311 are performed by one metal ventilation hole. 333. In addition, the opening 334 can be greatly enlarged, and the number of holes of the metal ventilation holes 333 can be reduced to about 1/3 of the number of holes of the brick ventilation holes 311. For this reason, the difficulty of casting production can be lowered, and the production cost can be reduced.
Further, by making the opening area of the opening 335 smaller than the opening area of the opening 334, it is possible to prevent the constituent material constituting the hardware main body 33 from being excessively reduced particularly on the lower surface 332 side. This eliminates the need to increase the thickness of the hardware, thereby reducing the production cost. Furthermore, the strength on the opening 335 side where the bending stress due to the load of the checker brick 31 is maximized can be ensured even at high temperatures.
(2) Since the adjacent openings 334 are arranged at a constant interval L1, the interval L1 between the openings 334 is not partially reduced. For this reason, the strength of the checker brick receiving hardware 32 on the checker brick 31 side can be made uniform, the life can be extended, and the stability of the support of the checker brick 31 can be improved.
(3) Since the substantially triangular openings 334 adjacent to each other in the B direction are alternately arranged in the opposite direction, the interval L1 between the openings 334 can be made constant, and the interval L1 is not partially narrowed. Therefore, the strength of the checker brick receiving hardware 32 can be made uniform.

(4) Since the convex portions 334A (corner portions) and the concave portions 334B (side portions) of the openings 334 adjacent to each other are arranged to face each other, the convex portions 334A and the concave portions 334B are arranged to face each other. There is no. For this reason, the distance L1 between the openings 334 can be made constant.
Further, by providing the concave portion 334B, the area other than the portion facing the brick ventilation hole 311 is reduced, and the constituent material of the hardware main body 33 can be increased. For this reason, the strength of the checker brick receiver 32 can be increased.
(5) By forming the opening 334 in a triangular shape, each corner (projection 334A) of the opening 334 is disposed opposite to the brick ventilation hole 311 so that the area between the corners is excessively large. The three brick ventilation holes 311 can be merged.
(6) Since the constricted portion 336 has a shape that decreases from the opening 334 side toward the opening 335 side, the opening 334 having a large opening area and the opening 335 having a small opening area are continuously provided. Can be formed.

[Configuration of Second Embodiment]
FIG. 6 shows a second embodiment of the present invention.
The hot stove according to this embodiment includes the same configuration as that of the hot stove 1 according to the first embodiment described above. For this reason, the same structure is shown with the same code | symbol, and the overlapping description is abbreviate | omitted.
In the hot stove 1 according to the first embodiment described above, the opening 334 of the metal vent 333 has a substantially triangular shape, and its three corners are arc-shaped convex portions 334A, and the three sides are An arcuate concave portion 334B was formed.
On the other hand, in the hot stove of this embodiment, the opening 334 of the metal vent hole 333 has a substantially triangular shape, and its three corners are convex portions 334A, and three sides connecting the three convex portions 334A. Is formed in a straight line.

The opening 334 in the present embodiment has an opening area to the extent that the opening 334 is opposed to the three adjacent brick vent holes 311. The arrangement of the openings 334 of the plurality of metal vent holes 333 is the same as the arrangement of the openings 334 of the hot stove 1 of the first embodiment described above.
In the present embodiment, the distance L2 (hole pitch) at which the linear portion of the opening 334 of the adjacent metal vent hole 333 and the convex portion 334A are adjacent to each other changes according to the radius of curvature of the convex portion 334A, and thus is constant. The interval L3 (hole pitch) at which the straight portions of the openings 334 of the adjacent metal vent holes 333 are adjacent to each other is a constant interval. Here, the interval of the narrowest portion of the interval L2 is set so as to be an interval having a width that can secure the strength required for the hardware main body 33.

[Effects of Second Embodiment]
(1) The same effects as the effects (1), (5), and (6) of the first embodiment described above can be exhibited.
(2) Since the linear portions of the adjacent openings 334 are arranged with a constant interval L3, the interval L3 between the linear portions is not partially narrowed. For this reason, the strength of the checker brick receiving hardware 32 on the checker brick 31 side can be made close to uniform, and the life can be extended, and the stability of the support of the checker brick 31 can be improved.

[Modification]
In addition, this invention is not limited to the thing of the structure demonstrated by the above embodiment, The modification in the range which can achieve the objective of this invention is contained in this invention.
For example, in the above-described embodiment, the opening 334 is formed to have an opening area that is disposed so as to be opposed to the three brick ventilation holes 311, but is not limited to this, and at least two brick ventilation holes 311 are provided. You may form with the opening area of the grade arrange | positioned facing. Moreover, the opening 334 may be formed to have an opening area that is arranged to face the four, five, six or more brick ventilation holes 311.

For example, as illustrated in FIG. 7, the opening 334 may be formed in a substantially square shape and may have an opening area that is disposed so as to face the four brick ventilation holes 311. When such an opening 334 is employed, the number of metal vent holes 333 can be reduced to about ¼ of the number of brick vent holes 311.
The opening 334 shown in FIG. 7 has convex portions 334A at four corners, and concave portions 334B (side portions) are provided between the convex portions 334A. The relationship between the distance L1 between the convex portion 334A and the concave portion 334B and the position of the center of curvature C is the same as described above.
The two convex portions 334A that face each other in the vertical direction in FIG. 7 are located farther outward in the horizontal direction from the center O than the other two convex portions 334A that face each other on the left and right. For this reason, the A direction and the B direction in which the plurality of openings 334 are arranged are not orthogonal to each other and intersect with each other with an acute angle θ.
Note that the substantially square-shaped opening 334 has the same shape even if it is reversed 180 degrees. Therefore, even if the array B1 in the B direction is alternately reversed, the result is the same as the case where the array is arranged in the same direction.

For example, as shown in FIG. 8, the opening 334 may be formed in a substantially hexagonal shape, and may have an opening area enough to be opposed to the six brick ventilation holes 311. When such an opening 334 is employed, the number of the metal ventilation holes 333 can be reduced to about 1/6 of the number of the brick ventilation holes 311.
The opening 334 shown in FIG. 8 has convex portions 334A at six corners, and concave portions 334B (side portions) are provided between the convex portions 334A. The relationship between the distance L1 between the convex portion 334A and the concave portion 334B and the position of the center of curvature C is the same as described above. The central portion of the opening 334 is also arranged to face the brick ventilation hole 311.
The A direction and the B direction in which the openings 334 shown in FIG. 8 are arranged are not orthogonal to each other but intersect with an obtuse angle θ.
Note that the substantially hexagonal opening 334 has the same shape even if it is reversed 180 degrees. Therefore, even if the array B1 in the B direction is alternately reversed, the result is the same as the case where the array is arranged in the same direction.

In the embodiment, the corner of the opening 334 is formed as an arcuate convex part 334A and the side part is formed as an arcuate concave part 334B. For example, such a convex part 334A, concave part 334B is not formed, each side extends in a straight line and intersects at a corner, and this corner is a circular arc smaller than the above-described convex portion 334A or a corner having substantially no curvature. It may be formed. Even in this case, the interval L1 between the adjacent openings 334 is constant.
Similarly, when the opening 334 is formed in a substantially rectangular shape or a substantially hexagonal shape as shown in FIGS. 7 and 8, each side may extend in a straight line shape and intersect at a corner portion, For example, each corner may be formed in an arc shape like the convex portion 334A.

  In the above embodiment, the curvature of the convex portion 334A is equal to the curvature of the brick ventilation hole 311 of the checker brick 31, but is not limited to this. For example, the curvature of the convex portion 334A is: The curvature may be set to be smaller than the curvature of the brick ventilation hole 311.

In the above-described embodiment, the constricted portion 336 is provided above 1/2 of the thickness dimension of the hardware main body 33, but is further provided above 1/3 of the thickness dimension of the hardware main body 33. It may be done. In addition, the constricted portion 336 is configured to be connected to the upper ventilation space 337, but is not limited thereto, and may be provided so as to be constricted immediately from the opening 334, for example. When the constricted portion 336 is thus provided on the upper side, the upper ventilation space 337 having a large cross-sectional area is configured to be short, while the lower ventilation space 338 having a small cross-sectional area is configured to be long. As a result, the amount of the constituent material of the hardware main body 33 can be increased, and the strength can be increased.
Conversely, the narrowed portion 336 may be provided below 1/2 of the thickness dimension of the hardware main body 33. Even in this case, since the lower ventilation space 338 is formed on the opening 335 side, the strength on the opening 335 side where the bending stress due to the load from the checker brick 31 is maximized can be secured.

  In the embodiment, the hot stove 1 is configured as an external combustion type in which the combustion chamber and the heat storage chamber are provided in different furnace bodies. However, the present invention is not limited to this. For example, the combustion chamber and the heat storage chamber include It may be configured as an internal combustion type and a top combustion type provided collectively in the same furnace body.

  Although the hole diameter of the brick ventilation hole 311 was about 20 mm, it is not limited to this, For example, you may set suitably about 20-45 mm. In this case, the convex portion 334A corresponds to the hole diameter of the brick ventilation hole 311 and is set to a diameter equal to or larger than the hole diameter.

  DESCRIPTION OF SYMBOLS 1 ... Hot air furnace, 2 ... Combustion chamber furnace body, 21 ... Burner, 22 ... Fuel gas introduction part, 23 ... Air introduction part, 24 ... Hot air supply part, 25 ... Connecting pipe, 3 ... Regenerative chamber furnace body, 31 ... Checker Brick, 311 ... Brick vent, 32 ... Checker brick receiver, 33 ... Metal body, 331 ... Upper surface, 332 ... Lower surface, 333 ... Metal vent, 334A, 335 ... Open, 334A ... Convex part, 334B ... Concave part 336: Constriction part, 336A ... Upper part, 336B ... Lower part, 337 ... Upper ventilation space, 338 ... Lower ventilation space, 34 ... Supporting column, 35 ... Inlet, A1, A2, B1 ... Array, L1 , L2, L3 ... intervals.

Claims (7)

A checker brick receiver for supporting a checker brick provided in the heat storage chamber of a hot stove equipped with a combustion chamber and a heat storage chamber,
A horizontally extending hardware body, and a support for supporting the hardware body,
A plurality of hardware vents are formed through the hardware body,
One opening of the plurality of hardware vents is sized to be opposed to at least two of the plurality of brick vents formed in the checker brick,
The other opening of the plurality of hardware vents has an opening area smaller than the opening area of the one opening. In the checker brick receiver according to claim 1,
One adjacent opening of the plurality of hardware vents is arranged at a predetermined interval. In the checker brick receiver according to claim 1 or 2,
The one opening is formed in a triangular shape, a quadrangular shape, or a hexagonal shape. In the checker brick receiver according to claim 3,
One opening of the plurality of metal vent holes is formed in a triangular shape, and one opening adjacent to each other is alternately arranged in the opposite direction. In the checker brick receiver according to any one of claims 1 to 4,
One opening of the plurality of hardware vents has a concave portion and a convex portion, respectively, and the convex portion of the one opening is relative to the concave portion of the other one opening adjacent to the one opening. A checker brick receiving hardware characterized by being placed facing each other. In the checker brick receiver according to any one of claims 1 to 5,
The plurality of hardware vents are configured to have a shape that shrinks from one opening side toward the other opening side. A combustion chamber; and a heat storage chamber for storing hot air from the combustion chamber,
The checker brick in which a plurality of brick ventilation holes are formed and the checker brick receiving hardware according to any one of claims 1 to 6 which supports the checker brick are provided in the heat storage chamber. A featured hot stove.

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