JP2018003134A - Additional column for checker brick receiving hardware, checker brick receiving hardware and column extension method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an additional column for a checker brick receiving hardware capable of increasing heat storage of a checker brick and capable of reducing running cost, a checker brick receiving hardware, and a column extension method.SOLUTION: An additional column 50 is installed between a lattice hardware 20 receiving the checker brick of an air heating furnace and a furnace bottom face 21, including: a column body 51; a crown hardware 52; and a beam hardware 53. The crown hardware 52 is arranged on the column body 51, and is abutted against the lattice hardware 20. The beam hardware 53 is driven into a space between the column body 51 and the crown hardware 52. The face abutted against at least either the column body 51 or the crown hardware 52 in the beam hardware 53 is formed as a tilted face tilted to a horizontal direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an additional column for a checker brick receiving fixture that supports a checker brick in a heat storage chamber of a hot stove, a checker brick receiving fixture, and a method for adding a column.

Conventionally, a hot stove has been used as equipment for supplying hot air to a blast furnace for iron making.
A plurality of (3-5) hot blast furnaces are installed per blast furnace, and while storing heat in any one of these blast furnaces, supplying hot air to the blast furnace in another hot blast furnace, Hot air can be continuously supplied to the blast furnace.
The hot stove includes a combustion chamber and a heat storage chamber, and checker bricks for heat storage are stacked in the heat storage chamber. A checker brick receiver for supporting the checker brick is installed on the bottom surface of the hot stove, and a duct is connected to a lower side surface of the hot stove so as to communicate with a space below the checker brick receiver.

  As an example of checker brick receiving hardware, a pillar (support stand) is set up on the bottom of the hot stove, a horizontal beam (Great Girder) is supported by this pillar, and a grid metal is stretched on the upper surface of the horizontal beam. Is known (see Patent Document 1). The checker brick is received on the upper surface side of the lattice hardware. The lattice hardware is provided with openings similar to the checker brick through-holes. A ventilation space is formed between the lower surface of the lattice metal and the bottom surface of the hot stove. The ventilation space communicates with the duct described above. Thereby, it is comprised so that ventilation can be carried out to a checker brick, a lattice metal, a ventilation space, and a duct.

When storing heat in the hot air furnace, the hot air that has heated the checker brick is ejected downward from the through hole of the lowermost checker brick, gathers in the ventilation space, and is then discharged from the duct to the outside.
When hot air is supplied to the blast furnace, outside air is introduced into the ventilation space from the duct, is distributed to the through holes of the checker brick, is heated while passing through the checker brick, and is sent to the blast furnace as hot air.

  By the way, in a blast furnace to which hot air is supplied from a hot air furnace, coke is required as a reducing source of iron ore and a heat source for melting. It is possible to reduce the coke consumption by increasing the temperature of the hot air from the hot air furnace, leading to a reduction in running cost. Therefore, it is desirable to increase the temperature of the hot air supplied from the hot air furnace to the blast furnace.

JP-A-51-20004

As described above, in order to change the hot air supplied from the hot stove to the blast furnace to high-temperature hot air having a sufficient amount of heat, the amount of heat stored in the checker brick of the hot stove (heat storage amount) is increased, and the checker brick It is necessary to increase the temperature, particularly the bottom surface temperature.
However, when the above-described checker brick receiving hardware reaches the heat resistant temperature or more, the checker brick receiving metal may be damaged, the checker brick collapses, and the hot-blast furnace operation may be stopped. For this reason, the upper limit value of the hot stove exhaust gas temperature that determines the ambient temperature of the bottom of the hot stove furnace is determined by the heat resistance temperature of the checker brick receiver.

Therefore, when supplying hot air to the blast furnace, the hot air for heating at the time of heat storage is restricted to the heat resistant temperature of the checker brick receiving metal part or less, and the upper limit of the heat storage energy of the checker brick is limited. As a result, the hot air supplied to the blast furnace cannot be further increased in temperature.
Here, it is conceivable to raise the upper limit of the heat storage energy of the checker brick by replacing the checker brick receiver of the existing hot stove with a checker brick receiver having a higher heat resistance temperature.
However, in order to replace the checker brick receiving hardware, it is necessary to perform a large-scale replacement / remodeling work including the checker brick. If this construction is carried out, a long operation stoppage period such as one year or more will be required, resulting in a decrease in blast furnace production.

As another countermeasure to increase the temperature, it is conceivable to add a support column that supports the lattice hardware. If the support can be increased, the strength of the checker brick receiving hardware can be improved and the heat-resistant temperature can be improved.
However, it is difficult to adjust the height dimension of the support column to be retrofitted. If the height dimension cannot be adjusted, it is not possible to correspond to the height dimension from the furnace bottom surface to the lower surface of the lattice hardware. Therefore, it is difficult to properly support the lattice hardware.

  An object of the present invention is to increase the heat storage amount of checker bricks to cope with higher temperatures, reduce running costs, and shorten the work period, and additional columns for checker brick receivers, checker brick receivers and columns The purpose is to provide an expansion method.

  The additional column for the checker brick receiving hardware of the present invention is an additional column installed between the lattice metal receiving the checker brick of the hot air furnace and the bottom surface of the furnace, and includes a plurality of column members stacked in the height direction. A column main body, a top metal fitting disposed on the column main body and abutting the lattice metal, between the column main body and the top metal hardware, in the middle of the column main body, or the column main body and the furnace bottom surface A height adjustment mechanism installed between the top end hardware and the top end hardware is disposed at a position corresponding to the vent hole of the lattice hardware, and the gas from the vent hole is directed to the side surface of the top end hardware. It has the slit which ventilates, It is characterized by the above-mentioned.

According to the additional pillar for the checker brick receiving hardware of the present invention, the additional pillar can be added to the checker brick receiving hardware by the following procedure.
First, the column main body is erected on the bottom of the furnace, and the top end hardware is placed on the column main body. At this time, a height adjusting mechanism is installed between the top end hardware, the column main body, or the column main body and the furnace bottom surface. With this height adjustment mechanism, the height of the additional pillar can be adjusted according to the height from the bottom of the hot stove to the bottom of the grid, and the top metal can be brought into contact with the grid Can be firmly supported.
Since additional pillars can be added in this way, there is no need to perform large-scale replacement / remodeling work for replacing checker brick receiving hardware, and it is possible to suppress a decrease in blast furnace production by eliminating the need for a long shutdown period.
Moreover, the heat-resistant temperature can be improved by increasing the strength of the checker brick receiving hardware, and the heat storage amount of the checker brick can be increased. Furthermore, by increasing the amount of stored heat, the hot air from the hot blast furnace to the blast furnace can be heated, coke can be reduced, and running costs can be reduced.

In this invention, a pillar main body can be divided | segmented into several pillar members small with respect to the said whole pillar main body, and each pillar member can be conveyed separately. Therefore, for example, even if the opening that leads to the ventilation space between the lattice metal and the furnace bottom is narrow enough to prevent the entire column body from being loaded at once, a plurality of column members are individually loaded into the ventilation space from the openings. it can. In addition, since the single column member is small and lightweight compared to the entire column main body, it is easy to carry in manually.
In the present invention, since the slit is formed in the top end hardware that contacts the lower surface of the lattice metal, it is possible to reduce the closed portions of the air holes of the lattice metal. Thereby, the gas flow inhibited by the top end hardware can be reduced.
In addition, the checker brick receiving metal object of this invention is provided with the lattice metal object, the girder which receives a lattice metal object, and the support | pillar which receives a girder, for example. The additional pillars are additionally installed with respect to the pillars, and are arranged at intervals between the pillars.

In the additional column for the checker brick receiving hardware according to the present invention, it is preferable that the plurality of column members can be engaged with each other.
According to such a configuration, when the plurality of column members are stacked, the column members can be easily positioned with each other by fitting the column members to each other. Thereby, the standing work of an additional pillar becomes easy and working time can be shortened.

  In the additional pillar for the checker brick receiving hardware of the present invention, the height adjusting mechanism is provided between a jack bolt that is erected on the furnace bottom surface and can contact the pillar body, and between the pillar body and the furnace bottom surface. It is preferable to have a wedge metal device that is driven into.

  The height adjusting mechanism includes a wedge hardware driven between the column main body and the top end hardware, and the surface of the wedge metal that abuts at least one of the column main body and the top end hardware is It is preferable that the inclined surface is inclined with respect to the horizontal direction.

In the additional column for the checker brick receiving hardware of the present invention, it is preferable that the inclined surface of the wedge metal object is set to an inclination angle larger than 0 degree and smaller than 10 degrees with respect to the horizontal direction.
According to such a configuration, the inclined surface is set to a gentle inclination angle as described above. For this reason, even if the wedge hardware is arranged between the column main body and the top end hardware, and the position of the wedge hardware or the top end hardware is not yet driven, the displacement of the wedge hardware and the top end hardware can be suppressed, and the column expansion work is facilitated. It can be carried out.

The additional column for the checker brick receiving hardware of the present invention preferably includes a stopper member for locking the wedge metal to the column main body and the top end metal.
According to such a configuration, the position shift of the wedge metal can be suppressed by locking the wedge metal by the stopper member after adjusting the column height dimension by driving the wedge metal.

In the additional column for the checker brick receiving hardware according to the present invention, the stopper member is formed in a wedge shape, and the wedge metal is formed with a through hole into which the stopper member is inserted in a direction intersecting the wedge driving direction. It is preferable.
According to such a configuration, by adjusting the insertion amount of the stopper member with respect to the through hole of the wedge metal object, the wedge metal object can be locked to the column main body and the top end metal object according to the wedge driving amount of the wedge metal object.

The additional column for the checker brick receiving hardware of the present invention preferably includes a retaining member that is fixed to the column main body and the top end hardware and that contacts the stopper member to prevent the stopper member from coming off.
According to such a configuration, the wedge driving state of the wedge metal object can be more reliably maintained by retaining the stopper member with the retaining member.

  The checker brick receiving hardware according to the present invention includes a lattice metal receiving the checker brick, a plurality of pillars receiving the lattice metal, and an additional column for the checker brick receiving hardware according to the present invention described above.

  According to the checker brick receiver of the present invention, it is possible to configure a checker brick receiver that can exhibit the same function and effect as the above-described additional pillar for the checker brick receiver of the present invention.

In the checker brick receiving hardware of the present invention, it is preferable that the additional pillar is disposed with a space between the plurality of pillars.
According to such a structure, the space | interval which supports a lattice metal object by a some support | pillar and an additional pillar can be shortened. For this reason, the stress which generate | occur | produces in a checker brick receiving metal object can be relieve | moderated, and heat-resistant strength can be improved efficiently.

The checker brick receiving hardware according to the present invention includes a lattice metal receiving the checker brick, a plurality of struts receiving the lattice metal, and the additional pillar for the checker brick receiving hardware according to the present invention described above. One additional column among the plurality of additional columns arranged adjacent to each other is located in the center with respect to the other plurality of additional columns of the plurality of additional columns, and the other plurality It is preferable that the wedge driving direction of the wedge metal object in the additional pillar is set along a direction from each of the other additional pillars to one additional pillar located in the center.
According to such a configuration, when the wedge metal object is driven in the other plurality of additional pillars, the other additional pillar is moved in the direction opposite to the wedge driving direction of the wedge metal object by the one additional pillar located in the center. Can be supported from the side. For this reason, the wedge driving operation of the wedge metal object can be easily performed.
Note that the adjacent arrangement of the additional columns includes a case where the additional columns are arranged in contact with each other and a case where the additional columns are arranged slightly apart so as not to interfere with each other.

  The column expansion method of the present invention is a column expansion method of adding the above-described additional column of the present invention to the checker brick receiving hardware, wherein the column main body of the additional column is erected on the furnace bottom of the hot stove, and the additional column The wedge hardware is placed on the column body, the top end hardware is placed on the wedge body, and the wedge height is driven between the column body and the top end hardware to adjust the column height dimension. It is characterized by that.

According to the column extension method of the present invention, the same operational effects as those of the checker brick receiving hardware of the present invention described above can be exhibited.
The case where the column body of the additional column is erected on the furnace bottom surface of the hot stove furnace is, for example, the case where the lower end portion of the column body is erected on the furnace bottom surface of the hot air furnace, and the non-shrink grout material constituting the furnace bottom surface In some cases, a part of the lower end is buried.

In the column expansion method of the present invention, it is preferable that the column main body is constituted by a plurality of column members, and the column main bodies are erected by stacking the plurality of column members in a height direction.
According to such a structure, the several pillar member which comprises a pillar main body can be conveyed separately. Therefore, for example, even if the opening leading to the ventilation space between the lattice hardware and the bottom of the furnace is formed so narrow that the entire column body cannot be carried at once, a plurality of column members smaller than the entire column body are individually provided. Can be carried into the ventilation space from the opening. In addition, since the single column member is small and lightweight compared to the entire column main body, it is easy to carry in manually.

In the column extension method of the present invention, when one additional column is installed and another additional column is arranged adjacent to the periphery of the additional column, the wedge hardware in the other additional columns is: It is preferable to drive in the wedge driving direction from the other plurality of additional columns toward the one additional column located in the center with respect to the other plurality of additional columns.
According to such a configuration, when the wedge metal object is driven in the other plurality of additional pillars, the other additional pillar is moved in the direction opposite to the wedge driving direction of the wedge metal object by the one additional pillar located in the center. Can be supported from the side. For this reason, the wedge driving operation of the wedge metal object can be easily performed.

In the column extension method of the present invention, it is preferable that the wedge metal is driven between the column main body and the top end hardware, and the wedge metal is locked to the column main body and the top end hardware by a stopper member. According to this configuration, after the column height is adjusted by driving the wedge metal, the wedge metal is locked by the stopper member, so that the displacement of the wedge metal can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the amount of heat storage of a checker brick can be increased, and the additional pillar for checker brick receivers which can reduce running cost, a checker brick receiver, and the pillar expansion method can be provided.

The schematic diagram which shows the hot stove using the checker brick receiving metal object which concerns on 1st Embodiment. Explanatory drawing which shows the checker brick receiving material which concerns on 1st Embodiment. The schematic diagram which shows the additional pillar for checker brick receiving metal objects which concerns on 1st Embodiment. The perspective view which shows the top end hardware of the checker brick receiving metal object which concerns on 1st Embodiment. The schematic diagram which shows construction of the checker brick receiving metal object which concerns on 1st Embodiment. The schematic diagram which shows the principal part of the additional pillar for checker brick receivers concerning 2nd Embodiment. The schematic diagram which shows the principal part of the additional pillar for checker brick receivers concerning 3rd Embodiment. Explanatory drawing which shows the additional pillar of the checker brick receiver concerning 4th Embodiment.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
In FIG. 1, a hot blast furnace 2 is connected to a blast furnace 1 for iron making so as to be able to supply hot air. Although only one hot stove 2 is shown in FIG. 1, a plurality of hot blast furnaces 2 are installed per blast furnace.

  The hot stove 2 is a furnace including a combustion chamber and a heat storage chamber 3. A heat storage checker brick 4 is stacked in the heat storage chamber 3. A duct 5 for circulating air to the checker brick 4 is connected to the lower side surface of the hot stove 2, and the checker brick according to the first embodiment is connected to a furnace bottom surface 21 (see FIG. 2) of the hot stove 2. A receiving object 10 is installed.

  Each checker brick 4 has a substantially hexagonal shape in a plan view, and a plurality of through holes are formed so as to penetrate vertically and arranged in a lattice shape. A plurality of checker bricks 4 are arranged in a grid pattern in the horizontal direction, and are stacked from the checker brick receiver 10 to the vicinity of the top of the hot stove 2 so that the respective through holes communicate with each other.

  The checker brick receiving hardware 10 is made of cast iron and supports the checker brick 4. 2A and 2B, the checker brick receiving hardware 10 includes a lattice metal 20 that receives the checker brick 4, a girder 30 that receives the lattice metal 20, and a plurality of columns 40 that receive the girder 30. And a plurality of additional columns 50 (hereinafter abbreviated as additional columns) for checker brick receiving hardware. The lattice metal 20, the girder 30, the support column 40, and the additional column 50 are made of cast iron.

  The lattice metal 20 has a flat plate shape and is provided in the furnace bottom portion inside the hot stove 2 so as to extend in the horizontal direction. A plurality of vent holes 201 shown in FIG. The upper surface of the lattice metal 20 supports the lower surface of the checker brick 4. The lower surface of the lattice metal 20 is supported by a plurality of support columns 40 via a girder 30 and supported by a plurality of additional columns 50.

A plurality of girder 30 are arranged along the lower surface of the lattice metal object 20.
The plurality of support columns 40 are arranged at predetermined intervals along the longitudinal direction of each girder 30. Each support column 40 is integrally formed in a column shape. The lower end of each support column 40 is fixed to the heat-resistant concrete 22 at the bottom of the hot stove 2. The upper end of each support column 40 is in contact with the lower surface of the girder 30.

  As shown in FIG. 3, each additional column 50 includes a column main body 51, a ceiling metal fitting 52 that is arranged on the column main body 51 and abuts against the lattice hardware 20, and between the column main body 51 and the ceiling metal fitting 52. The wedge metal object 53 is driven, and the wedge metal object 53 constitutes a height adjusting mechanism. The additional pillar 50 is preferably formed of heat-resistant cast iron having a heat-resistant temperature (about 450 to 600 ° C.) higher than the heat-resistant temperature (about 300 to 450 ° C.) of the existing support column 40.

The column main body 51 includes a plurality of column members 511 stacked in the height direction of the hot stove 2. Each column member 511 is formed in a hexagonal cross section.
Of the plurality of column members 511, the lowermost column member 511 </ b> A has a steel shaft body 54 inserted in a hole formed on the lower surface side thereof. Here, the shaft body 54 is fixed to the heat-resistant concrete 22 through the non-shrink grout material 24 poured into the groove portion formed by the bricks 23 laid on the heat-resistant concrete 22. 21 is erected. A convex portion 512 (a dowel) is formed on the upper surface of the column member 511A.
A concave portion 513 is formed on the lower surface of the uppermost column member 511 </ b> B among the plurality of column members 511. The upper surface of the column member 511B is formed as a flat horizontal surface.
The plurality of remaining column members 511 excluding the column members 511A and 511B have a convex portion 512 formed on the upper surface and a concave portion 513 formed on the lower surface.
Here, each convex part 512 is concavo-convexly fitted to each concave part 513, and positions the column members 511 relative to each other.

As shown in FIG. 3, the top end hardware 52 includes a top end main body 521 that abuts on the lower surface of the lattice hardware 20 and a wedge abutment body 522 that abuts on the wedge metal 53. The lower surface of the top end main body 521 is fixed to the upper surface of the wedge contact body 522.
As shown in FIG. 4, the top end main body 521 is configured by forming a plurality of ventilation slits 523 side by side in the block body.
The slits 523 are open on the top surface and both side surfaces of the top end main body 521, and are formed so that gas from the vent holes 201 of the lattice metal 20 can be vented from the top surface of the top end main body 521. The depth dimension of the slit 523 (depth dimension from the upper surface to the lower surface side of the top end main body 521) gradually increases from the central portion in the left-right direction of the top end main body 521 toward both left and right end portions.
The portion located between the slits 523 in the top end main body 521 is formed in a plate shape, and the upper surface of the portion is in contact with the lower surface of the lattice metal object 20.
The lower surface 522 </ b> A of the wedge contact body 522 is formed as an inclined surface that is inclined along the upper surface of the wedge metal object 53.
In addition, the top end main body 521 and the wedge contact body 522 may be integrally formed.

The wedge metal 53 is formed such that the thickness dimension T in the vertical direction gradually increases from one end side to the other end side in the horizontal direction.
The lower surface 531 of the wedge metal object 53 is formed as a flat horizontal surface and abuts on the upper surface of the column member 511B.
The upper surface 532 of the wedge metal 53 is formed as a flat inclined surface set to an inclination angle larger than 0 degree and smaller than 10 degrees with respect to the horizontal direction, in this embodiment, an inclination angle of 1 degree.
The wedge metal 53 is configured such that the column height dimension L of the entire additional column 50 can be adjusted by adjusting the amount of wedge driving driven between the column main body 51 and the top end metal 52.

In the checker brick receiving hardware 10, as shown in FIG. 2 (B), seven additional pillars 50 may be arranged adjacent to each other, and the seven additional pillars 50 arranged adjacently in this way are arranged between the girders 30. Thus, the plurality of support columns 40 are arranged at intervals.
One additional column 50A among the plurality of additional columns 50 arranged adjacent to each other is located in the center with respect to the other plurality of additional columns 50B among the plurality of additional columns 50.
The wedge driving direction of the wedge hardware 53 in each additional column 50B is set along the direction from each of the additional columns 50B toward the additional column 50A. For this reason, the wedge driving direction of the six additional pillars 50B is a radial direction centering on the central additional pillar 50A.

When heat is stored in the hot stove 2 described above, the gas burned in the combustion chamber is introduced into the heat storage chamber 3 and the checker brick 4 in the heat storage chamber 3 is heated. The gas that heated the checker brick 4 is jetted downward from the through hole of the checker brick 4 and flows to the duct 5 through the ventilation space 6 formed between the checker brick receiving hardware 10 and the furnace bottom surface 21 of the hot air furnace 2. Discharged.
When hot air is supplied to the blast furnace 1 in the hot air furnace 2, outside air is introduced into the ventilation space 6 from the duct 5, distributed from the ventilation space 6 to each through hole of the checker brick 4, and passes through the checker brick 4. It is heated in between and sent to the blast furnace 1 as hot air.

[Pole extension method according to the first embodiment]
Hereinafter, a column extension method for adding the additional column 50 to the checker brick receiving hardware 10 according to the present embodiment will be described.

First, the inspection manhole 8 provided at the lower portion of the hot stove 2 is opened, and a plurality of column members 511 of the additional columns 50 are carried into the ventilation space 6 between the furnace bottom surface 21 and the lattice metal object 20.
Next, as shown in FIG. 5A, the lowermost column member 511A is disposed at a predetermined position on the furnace bottom surface 21, and the shaft body 54 protruding from the furnace bottom surface 21 is inserted. Subsequently, a plurality of column members 511 (including the uppermost column member 511B) are stacked on the column member 511A. At this time, each convex part 512 is concavo-convexly fitted to each concave part 513. In this way, the column main body 51 is erected on the furnace bottom surface 21 as shown in FIG.

Next, as shown in FIG. 5C, the wedge metal 53 is placed on the upper surface of the column main body 51 (the upper surface of the column member 511 </ b> B), and the top end hardware 52 is placed on the upper surface of the wedge metal 53.
Then, the wedge metal 53 is driven between the column main body 51 and the top edge metal 52, and the top edge metal 52 is moved upward. When the wedge metal 53 is driven, the top surface of the top end metal 52 comes into pressure contact with the bottom surface of the lattice metal 20.
In this way, the additional pillar 50 is installed as shown in FIG. The column height dimension L of the additional column 50 can be adjusted by adjusting the wedge driving amount of the wedge metal object 53.

Here, a plurality of additional pillars 50 may be arranged adjacent to each other as shown in FIG. The procedure for arranging the additional pillars 50 adjacent to each other is as follows.
First, the central additional column 50A is installed as described above. Next, six additional pillars 50B are arranged adjacently around the additional pillar 50A. Here, the wedge driving direction of each additional column 50B is a direction from each additional column 50 toward the central additional column 50A. In this way, a plurality of additional pillars 50 are arranged adjacent to each other.

[Effect of the first embodiment]
(1) In this embodiment, the additional pillar 50 is the additional pillar 50 installed between the lattice metal object 20 that receives the checker brick 4 of the hot stove 2 and the furnace bottom surface 21, and includes a pillar body 51, a pillar body 51. A top end hardware 52 disposed on the top 51 and abutting against the lattice hardware 20 and a wedge metal 53 driven between the column main body 51 and the top end metal 52 are provided. The wedge metal 53 includes the column main body 51 and the top end. The surface in contact with at least one of the metal objects 52 is formed as an inclined surface (upper surface 532) inclined in the horizontal direction.
Since it has the said structure, the additional pillar 50 can be expanded to the checker brick receiving metal object 10 with the following procedure. First, the column main body 51 is erected on the furnace bottom surface 21, the wedge metal 53 is placed on the column main body 51, and the top end hardware 52 is placed on the wedge metal 53. Next, the wedge metal 53 is driven between the column main body 51 and the top end metal 52 to adjust the column height dimension L.
Here, by adjusting the wedge driving amount of the wedge metal object 53, the column height dimension L of the additional pillar 50 can be adjusted corresponding to the height dimension from the bottom surface 21 of the hot stove 2 to the lower surface of the lattice metal object 20. The lattice metal 20 can be firmly supported. Since the additional pillar 50 can be added in this way, it is not necessary to perform a large-scale replacement / remodeling work for replacing the checker brick receiving hardware 10, and it is possible to suppress a decrease in the blast furnace production amount by eliminating the need for a long operation stoppage period. .
Moreover, the intensity | strength of the checker brick receiving metal object 10 can be raised, heat-resistant temperature can be improved, and the heat storage amount of the checker brick 4 can be increased. Furthermore, by increasing the amount of stored heat, the hot air from the hot blast furnace 2 to the blast furnace 1 can be heated, coke can be reduced, and running costs can be reduced.
Furthermore, in the present embodiment, the following effects can be exhibited.

(2) The upper surface 532 (inclined surface) of the wedge metal object 53 is set to an inclination angle larger than 0 degree and smaller than 10 degrees with respect to the horizontal direction. As a result, the upper surface 532 described above has a gentle inclination angle, so that the wedge metal 53 is disposed between the column main body 51 and the top end metal 52 and is not yet driven. In addition, it is possible to suppress the displacement of the top end hardware 52 and to easily perform the column expansion work.

(3) The column main body 51 includes a plurality of column members 511 stacked in the height direction. For this reason, the column main body 51 can be divided into a plurality of column members 511 smaller than the column main body 51, and each column member 511 can be carried individually. Therefore, for example, even if the opening 7 leading to the ventilation space 6 between the lattice metal 20 and the furnace bottom surface 21 is formed so narrow that the entire column main body 51 cannot be carried at once, the plurality of column members 511 are individually provided. It can be carried into the ventilation space 6 from the opening. Moreover, since the column member 511 alone is small and lightweight as compared with the entire column main body 51, it is easy to carry it in manually.

(4) The plurality of column members 511 are configured to be able to fit with each other. For this reason, when stacking the plurality of column members 511, the column members 511 can be easily positioned relative to each other by engaging the column members 511 with each other. Thereby, the standing work of the additional pillar 50 becomes easy and working time can be shortened.

(5) The top metal fitting 52 is formed with a slit 523 that is disposed at a position corresponding to the vent hole 201 of the lattice metal fitting 20 and vents the gas from the vent hole 201 to the side surface of the top metal fitting 52. For this reason, the obstruction | occlusion location of the ventilation hole 201 of the lattice metal object 20 can be reduced, and inhibition of the gas flow by the top edge metal object 52 can be reduced.

(6) The additional pillars 50 are disposed with a space between the plurality of pillars 40. For this reason, the space | interval which supports the lattice metal object 20 by the support | pillar 40 and the additional pillar 50 can be shortened, the stress which generate | occur | produces in the checker brick receiving metal object 10 can be relieve | moderated, and heat-resistant temperature can be improved efficiently.

(7) One additional column 50A among the plurality of additional columns 50 arranged adjacent to each other is located in the center with respect to the other plurality of additional columns 50B, and the wedge driving direction of the wedge hardware 53 in the plurality of additional columns 50B. Is set along the direction from each of the plurality of additional pillars 50B toward the central additional pillar 50A. Therefore, when the wedge metal object 53 is driven in the plurality of additional pillars 50B, the plurality of additional pillars 50B can be supported from the opposite side to the wedge driving direction of the wedge metal object 53 by the central additional pillar 50A. Thereby, the wedge driving | operation operation | work of the wedge metal object 53 can be performed easily.

[Second Embodiment]
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.
The additional column 60 for the checker bracket according to the second embodiment shown in FIG. 6 is formed in the same manner as the additional column 50 for the checker bracket according to the first embodiment except for the wedge bracket 53.
The additional pillar 60 further includes a stopper member 61 in addition to the same configuration as the additional pillar 50.

The stopper member 61 has a wedge shape, and is formed such that the thickness dimension gradually increases from the lower end toward the upper end.
The additional column 60 includes a wedge metal 63. The wedge metal 63 is formed in substantially the same manner as the wedge metal 53, but further has a through-hole 64 penetrating in the vertical direction, which is a direction intersecting the wedge driving direction (FIGS. 6A and 6). (See (B)).
In the additional column 60, the wedge member 63 is driven between the column main body 51 and the top end metal member 52, and then the stopper member 61 is inserted into the through hole 64. Thereby, the wedge metal 63 is locked to the column main body 51 and the top edge metal 52, and the positional deviation of the wedge metal 63 is suppressed.
Further, by adjusting the amount of insertion of the stopper member 61 into the through hole 64, the wedge metal 63 can be firmly locked to the column main body 51 and the top edge metal 52 according to the wedge driving amount of the wedge metal 63.
The stopper member 61 is not limited to the wedge shape, and may have a shape that can be inserted into the through hole 64. Therefore, for example, the stopper member 61 may have a rectangular parallelepiped shape.

[Third Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
The additional pillar 70 shown in FIG. 7 is provided with the pillar main body 51, the top end hardware 52, the wedge metal 63, and the stopper member 61 similarly to 2nd Embodiment.
Furthermore, the additional pillar 70 includes a retaining member 71 shown in FIGS. 7A and 7B.
The retaining member 71 includes a pair of fixing members 72 welded to the side surfaces of the column main body 51 and the top end fitting 52, and a retaining plate 73 welded to the pair of fixing members 72. The retaining plate 73 is disposed along the horizontal direction. The retaining plate 73 is in contact with the upper surface of the stopper member 61 at the lower surface, and suppresses the stopper member 61 from coming out upward. By preventing the stopper member 61 from being removed by the retaining member 71 in this manner, the wedge driving state of the wedge metal 63 can be more reliably maintained.

[Fourth Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIG.
In the above embodiment, the height adjusting mechanism is formed by installing the wedge metal 63 between the column main body 51 and the top end metal 52. On the other hand, the height adjusting mechanism of the present embodiment is formed between the column main body 51 and the furnace bottom surface 21.

In FIG. 8, the additional column 80 includes a column main body 51 and a top end hardware 52 as in the case of the additional column 50 of the first embodiment described above, and the column main body 51 includes a plurality of column members 511. However, the top end hardware 52 is only the top end main body 521 in which the slit 523 is formed, and the wedge contact body 522 and the wedge metal 63 which are the height adjusting mechanism in the first embodiment are omitted.
The additional column 80 has a lower end member 81 at the lower end of the column main body 51, and a height adjusting mechanism is configured between the lower end member 81 and the furnace bottom surface 21.

A steel base member 82 is fixed to the furnace bottom surface 21, and a plurality of jack bolts 83 are installed on the base member 82. The bottom surface member 811 of the lower end member 81 is supported by the head of the jack bolt 83 adjusted to a predetermined height, and is fastened to the base member 82 by the fastening bolt 84. Thus, the upper end of the additional column 80 is adjusted to a predetermined height with respect to the furnace bottom surface 21.
Between the bottom surface member 811 and the base member 82, a wedge metal 85 is driven from the side (between the jack bolts 83) from the side, and the load of the additional pillar 80 is transferred to the furnace bottom surface 21 through the wedge metal 85. Reliable transmission.

  Also in this embodiment, the height of the additional pillar 80 or the top end fitting 52 can be adjusted by the jack bolt 83 and the wedge fitting 85 which are the height adjusting mechanism, which is the same as the first embodiment described above. An effect can be obtained.

[Modification]
The present invention is not limited to the configuration described in the above embodiment, and modifications within a range in which the object of the present invention can be achieved are included in the present invention.
For example, in the above-described embodiment, the column main body 51 is configured by being divided into the plurality of column members 511, but is not limited thereto, and may be integrally formed in a column shape as long as it can be carried into the ventilation space 6. Good.

  In the above embodiment, the convex portions 512 (the dowels) and the concave portions 513 are formed on the plurality of column members 511, but the configuration of the convex portions 512 and the concave portions 513 may be omitted.

  In the above embodiment, the top end hardware 52 is formed with the slit 523 through which the gas from the vent hole 201 of the lattice metal 20 passes, but the configuration of the slit 523 may be omitted.

  In the above embodiment, the inclination angle of the upper surface 532 (inclined surface) of the wedge metal object 53 is set to an inclination angle smaller than 10 degrees with respect to the horizontal direction, but the present invention is not limited to this, and the wedge metal object 53 is replaced with the top edge metal object 52. The tilt angle may be 10 degrees or more as long as it can be placed on top.

  In the above-described embodiment, the plurality of additional pillars 50 are arranged adjacent to each other, but the present invention is not limited to this, and may be arranged in a distributed manner.

  In the embodiment, the upper surface 532 of the wedge metal 53 is inclined with respect to the horizontal direction, but the present invention is not limited to this. For example, the upper surface 532 may be formed as a flat horizontal surface, and the lower surface 531 may be formed as an inclined surface inclined with respect to the horizontal direction. Further, both the upper surface 532 and the lower surface 531 may be formed as inclined surfaces. In this case, the upper surface of the column member 511 </ b> B and the lower surface 522 </ b> A of the top end hardware 52 are inclined surfaces or horizontal surfaces corresponding to the inclination angles of the lower surface 531 and the upper surface 532 of the wedge metal object 53.

In the above-described embodiment, the lower surface 531 and the upper surface 532 of the wedge metal object 53 are formed flat. However, the present invention is not limited to this, and the guide portion is configured as a convex shape or a concave shape (V shape) extending in the wedge driving direction. May be. In this case, the upper surface of the column member 511 </ b> B and the lower surface 522 </ b> A of the top end hardware 52 have a concave shape or a convex shape corresponding to the shape of the lower surface 531 or the upper surface 532 of the wedge hardware 53.
By configuring the guide portion in this manner, the wedge metal object 53 can be guided in the wedge driving direction, and can be driven easily. For this reason, the column height dimension L can be adjusted more easily and accurately by driving the wedge 53 into the wedge.

  In the embodiment, each column member 511 of the additional column 50 is formed in a hexagonal cross section, but is not limited thereto, and may be a polygonal shape such as a triangular shape or a quadrangular shape, or a circular shape in cross section. It may be.

  In the above-described embodiment, the support column 40 indirectly receives the lattice metal object 20 via the girder 30. However, the structure is not limited to this, and the structure of the girder 30 is omitted, and the lattice metal object 20 is directly received by the support column 40. May be.

  In the said embodiment, although the material of the lattice metal object 20, the girder 30, the support | pillar 40, and the additional pillar 50 was demonstrated as cast iron, if these materials satisfy | fill the heat resistant strength mentioned above, it does not need to be made of cast iron, for example, fireproof It may be a product or cast steel.

  DESCRIPTION OF SYMBOLS 1 ... Blast furnace, 2 ... Hot-blast furnace, 21 ... Furnace bottom surface, 22 ... Heat-resistant concrete, 23 ... Brick, 24 ... Non-shrink grout material, 3 ... Thermal storage room, 4 ... Checker brick, 5 ... Duct, 6 ... Ventilation space, 7 ... Opening, 8 ... Manhole for inspection, 10 ... Checker brick receiving hardware, 20 ... Lattice hardware, 201 ... Vent, 30 ... Girder, 40 ... Post, 50 (50A, 50B), 60, 70 ... Additional pillar, 51 ... Column body 511 (511A, 511B) ... Column member, 512 ... Convex part, 513 ... Concave part, 52 ... Top end hardware, 521 ... Top end body, 522 ... Wedge contact body, 522A ... Bottom surface, 523 ... Slit, 53 ... Wedge metal, 531 ... Lower surface, 532 ... Upper surface, 54 ... Shaft, 61 ... Stopper member, 63 ... Wedge metal, 64 ... Through-hole, 71 ... Retaining member, 72 ... Fixing member, 73 ... Retaining plate, L … Column height dimension, T… Dimensioned.

Claims (15)

An additional pillar installed between the lattice hardware that receives the checker bricks of the hot stove and the bottom of the furnace,
A column main body having a plurality of column members stacked in a height direction, a top metal fitting disposed on the column main body and abutting against the lattice metal, and between the column main body and the top metal hardware, A height adjustment mechanism installed in the middle of the main body or between the column main body and the furnace bottom surface,
The ceiling metal fitting is disposed at a position corresponding to the vent hole of the lattice metal fitting, and has a slit for venting the gas from the vent hole to the side surface of the ceiling metal fitting. Additional pillars. In the additional pillar for the checker brick receiver according to claim 1,
The plurality of pillar members can be concavo-convexly fitted to each other. An additional pillar for a checker brick receiver. In the additional pillar for the checker brick receiving hardware according to claim 1 or 2,
The height adjusting mechanism includes a jack bolt that is erected on the bottom surface of the furnace and can come into contact with the column main body, and a wedge hardware that is driven between the column main body and the bottom surface of the furnace. An additional pillar for checker brick receiving hardware. In the additional pillar for the checker brick receiving hardware according to claim 1 or 2,
The height adjustment mechanism includes a wedge metal tool that is driven between the column main body and the top end metal object,
The wedge hardware is formed as an inclined surface that is inclined with respect to a horizontal direction, and a surface that abuts at least one of the column main body and the top end hardware is formed as an additional for a checker brick receiving hardware. Pillar. In the additional pillar for the checker brick receiver according to claim 4,
The inclined surface of the wedge hardware is set to an inclination angle larger than 0 degrees and smaller than 10 degrees with respect to the horizontal direction. In the additional pillar for the checker brick receiving hardware according to claim 4 or 5,
An additional pillar for a checker brick receiving hardware, comprising a stopper member for locking the wedge hardware to the pillar main body and the top edge hardware. In the additional pillar for the checker brick receiver according to claim 6,
The stopper member is formed in a wedge shape,
A through hole into which the stopper member is inserted in a direction crossing the wedge driving direction is formed in the wedge metal object. In the additional pillar for the checker brick receiving hardware according to claim 6 or 7,
An additional column for a checker brick receiving hardware, comprising: a retaining member fixed to the column main body and the top end hardware, and a stopper member that comes into contact with the stopper member and prevents the stopper member from coming off. Lattice hardware that receives checker bricks,
A plurality of struts for receiving the lattice hardware;
A checker brick receiver comprising the additional pillar for the checker brick receiver according to any one of claims 1 to 8. In the checker brick receiver according to claim 9,
The additional pillar is arranged with a space between the plurality of support columns. Lattice hardware that receives checker bricks,
A plurality of struts for receiving the lattice hardware;
An additional column for the checker brick receiving hardware according to any one of claims 3 to 8,
The additional pillars are arranged adjacent to each other, and one additional pillar among the plurality of additional pillars arranged adjacent to each other is located in the center with respect to the other plurality of additional pillars of the plurality of additional pillars. And
The wedge driving direction of the wedge metal object in the other additional pillars is set along a direction from each of the other additional pillars to the one additional pillar located in the center. Checker brick receiving hardware. A pillar extension method for adding an additional pillar for the checker brick receiver according to any one of claims 4 to 8 to the checker brick receiver,
Stand the column body of the additional column on the bottom of the hot stove,
Place the wedge of the additional pillar on the pillar body,
Place the top edge hardware on the wedge hardware,
A pillar extension method, wherein the wedge height is driven between the pillar main body and the top end hardware to adjust the height of the pillar. In the pillar expansion method according to claim 12,
The pillar body is constituted by a plurality of pillar members,
A pillar extension method, wherein the pillar body is erected by stacking the plurality of pillar members in a height direction. In the pillar expansion method according to claim 12 or claim 13,
Install one additional pillar,
When installing a plurality of additional pillars adjacent to each other around the additional pillars,
The wedge metal in the other plurality of additional columns is driven in a wedge driving direction from the other plurality of additional columns to the one additional column located in the center with respect to the other plurality of additional columns. How to add pillars. In the pillar expansion method as described in any one of Claims 12-14,
Driving the wedge hardware between the pillar body and the top edge hardware,
A method for adding pillars, wherein the wedge metal is locked to the pillar body and the top edge metal by a stopper member.

Images