JP2003293016A - Steel-made trough wall structural body and method for constructing trough wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel-made trough wall structure having better countermeasures to heat-deterioration and heat-expansion, and at a lower cost and for a shorter term of the work in comparison with an iron-reinforced concrete structure and at a lower cost and for a shorter term of the work in comparison with the conventional steel-made trough wall structure. <P>SOLUTION: In the trough, for which the high temperature flowing material, such as molten iron and molten slag, flows, set on a casting floor for blast furnace, the steel-made trough wall 23 disposed in the rectangular direction to the flowing direction of molten metal in the trough, is constituted by standing a plurality of square-type steel tubes 14 for trough wall on the floor surface 15. On the side part positioned at the side, in which the heat of the high temperature flowing material flowing on the trough groove in the square-type tube 14 for trough wall is directly received, a slit 25 for absorbing the heat expansion is opened by extending in the vertical direction, and the slit 25 is constituted by closing with a tape 34. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel trough structure frame and a trough wall construction method which are formed on both sides of a trough through which a high-temperature fluid such as hot metal or slag from a blast furnace flows.

[0002]

2. Description of the Related Art In a blast furnace facility, a high-temperature fluid such as hot metal or slag flowing out of the blast furnace is constructed into a gutter such as a large gutter, a hot metal gutter, or a slag gutter. Is shown in FIG.
The gutter wall 2 of the gutter body 1 is mainly composed of a reinforced concrete (RC) gutter wall as shown in FIG.

In the type in which the gutter main body 1 and the gutter wall 2 are installed as shown in FIG. 12, for example, the gutter main body 1 is a floor made of PC (precast concrete) or the like installed on a steel beam 14 such as H-shaped steel. An RC-made gutter wall 2 is constructed on top of No. 4. In FIG. 12, the gutter lid 1 is provided between the upper ends of the gutter walls 2.
It is closed by 2, and the outer sides of both sides are a working floor 13 flush with the gutter lid 12.

This reinforced concrete gutter wall structure has been pointed out the following problems in terms of heat resistance and workability.

Since the blast furnace facility is exposed to a high temperature environment during its operation, the water in the concrete forming the gutter wall evaporates due to long-term use, resulting in a decrease in strength and a decrease in elastic modulus.
Induces the progress of neutralization.

When the gutter wall is thermally expanded, internal stress is generated in the concrete, cracks are generated in the deformation restraint portion, and the strength is lowered. Further, depending on the operating condition of the blast furnace equipment, the flow and stoppage of molten pig iron and slag are repeatedly performed, so that the internal stress in the concrete is repeatedly generated, and the strength reduction due to cracking is promoted.

As measures against the above, it has been proposed to adopt heat-resistant concrete, to improve the specifications of refractories inside the gutter wall, to increase the thickness, etc. However, the cost is several times that of a normal reinforced concrete structure.

In the construction of reinforced concrete,
Reinforcing bar → Formwork → Concrete pouring → Curing → Formwork removal, etc.
Since it requires multi-step and multi-skilled workers, mainly on-site work,
The construction period and cost will be large.

The above-mentioned problems cannot be avoided due to the characteristics of concrete, and are a fatal problem in a situation where cost reduction and longer life of equipment are required.

The problem is dealt with by devising a joint portion that does not restrain thermal expansion and setting a concrete cross section capable of withstanding internal stress, but there is a limit, and for larger deformation. Is ineffective and increases costs.

[0011] Regarding the problem, it is critical in achieving the blast furnace repair (construction) in a short period of time.

In order to solve the problems of the conventional concrete gutter wall structure, there is one having a steel gutter wall structure constructed by a steel frame and a steel wall plate. That is, by constructing a gutter wall by movably connecting the respective constituent members of the column, the furring strip and the steel wall plate vertically or horizontally, it is possible to prevent buckling deformation due to thermal expansion of the respective constituent members. Therefore, the present applicant has proposed (Japanese Patent Application No. 10-92287, Japanese Patent Application Laid-Open No. 11-92287).
269517).

Referring to FIG. 13, a gutter wall 16 made of ordinary steel or fire-resistant steel plate is constructed on the floor surface 15.
The outer side of the steel gutter wall 16 is supported via a horizontal furring strip 17 by columns (vertical furring strips) 18 made up of ordinary steel or fire-resistant steel standing on the floor surface 15. On the outer side of the pillar, a steel frame pillar 19 is erected between the floor surface 15 and the upper beam member 20. In FIG. 13, a space between the upper ends of the gutter walls 2 is closed by a gutter lid 12, and both outer sides of the gutter wall 12 are a working floor 13 flush with the gutter lid 12. The steel gutter wall 16 has a required height (for example,
(3.0 to 4.0 m) and several tens of meters in length.

In the above-mentioned prior art example, the steel gutter wall 16 improves the drawbacks of the reinforced concrete gutter wall, and at the same time, it is possible to avoid the propagation of the thermal expansion deformation to the upper beam member 20 and the steel frame column 19. The steel gutter wall 16 is a steel frame support 19
By inserting bolts into the horizontal furring strips 17 that are mounted so as to be able to expand and contract in the bolt holes formed in the loose holes that are long in the left-right direction, thermal expansion in the left-right direction of the steel gutter wall 16 is absorbed. Installed as possible.

However, in the above-mentioned structure, a troublesome construction work from both inside and outside of the steel gutter wall 16 by using bolts and nuts, and welding work of a furring strip joint metal (not shown) to the steel gutter wall 16 are carried out. However, it takes a lot of time and labor to build a steel gutter wall.
There was still room for improvement in terms of construction costs and steps.

Therefore, in order to further improve the above technique,
The applicant of the present invention is assigned to Japanese Patent Application Nos. 2001-68244 and 2001
-73570 (both unpublished) is proposed. These two prior arts are a further simplification of the steel trough wall of FIG. 13 and, when an excessive load is applied to the trough wall that thermally expands due to high temperature fluid such as hot metal or molten slag, By adopting a control structure that can be absorbed by the load absorbing function given to, the damage due to buckling deformation of each component that constructs the gutter wall can be prevented, and the work such as processing of the wall board, construction cost, and steps can be taken into consideration. Has improved.

[0017]

As a result of further research on the above-mentioned prior art, the present inventor can further simplify the gutter wall structure by constructing the gutter wall using a square steel pipe and shorten the construction period. It was found that it is possible to take measures against thermal deterioration and thermal expansion.

The present invention has been proposed from the above viewpoint, and its purpose is to compare with reinforced concrete structures.
Measures against heat deterioration, measures against thermal expansion, inexpensive, short construction period,
Compared with the steel gutter wall structure according to the applicant's prior patent application,
The purpose of the present invention is to provide a steel gutter wall structure that is simpler in structure and cheaper in construction period.

[0019]

In order to achieve the above-mentioned object, the present invention is constructed as follows.

The first invention is installed on a cast floor of a blast furnace,
In a gutter in which a high-temperature fluid such as hot metal or molten slag flows, a gutter wall arranged in a direction perpendicular to the gutter flow direction is constructed by vertically arranging a plurality of square steel pipes next to each other on a casting floor. Is characterized by.

In a second invention, instead of the first invention in which a plurality of rectangular steel pipes are vertically installed adjacent to each other, the rectangular steel pipes are arranged at a predetermined interval, and the adjacent corners are opened at intervals. It is characterized in that the shape steel pipes are connected by welding with two connecting plates arranged in parallel.

In the third invention, instead of the first invention in which a plurality of square steel pipes are vertically installed adjacent to each other, a plurality of H-section steels are arranged so that both side edges of each flange are in contact with each other, and the contact is made. It is characterized in that the edges are fixed by welding.

In a fourth invention, instead of the gutter wall structure in the first invention in which a plurality of square steel pipes are vertically installed adjacent to each other, a plurality of H-shaped steels are arranged in parallel at a predetermined interval. It is characterized in that a plate is arranged between them, and both side edges of the flange of the H-section steel and the side edges of the plate which are adjacent to each other with a predetermined space therebetween are fixed by welding.

In a fifth invention, in place of the first invention in which a plurality of square steel pipes are vertically installed adjacent to each other, a plurality of groove steels are provided at predetermined intervals so that the grooves and the backs alternately face each other. Are arranged in parallel with each other, and plates are arranged on both side surfaces of each flange of each channel steel, and both side surfaces of the flange and a contact portion of the plate are fixed by welding.

In a sixth aspect of the present invention, in the steel gutter wall according to any one of the first to fifth aspects, a thermal expansion absorbing slit of the gutter wall is vertically extended on a side surface located on the gutter groove side. It is characterized by being opened by.

A seventh invention is characterized in that the slit for thermal expansion absorption in the sixth invention is closed with a tape.

An eighth aspect of the present invention is to form a stretch absorption band due to thermal expansion of the steel trough in the connecting portion between the unit members constituting the steel trough in any one of the first to seventh aspects. It is characterized by

In a ninth aspect of the invention, the lower end portion of the steel gutter wall according to any one of the first to eighth aspects of the invention is embedded and fixed in a concrete layer cast on the floor through an anchor bar. It is characterized by

A tenth aspect of the invention is characterized in that the lower end portion of the steel gutter wall according to any one of the first to eighth aspects is fixed on the floor surface via a base plate.

An eleventh invention is characterized in that the lower end portion of the steel gutter wall in any one of the first to eighth inventions is fixed to the floor surface through an angle metal fitting.

A twelfth aspect of the present invention is the steel gutter wall according to any one of the first to eleventh aspects of the invention, in which a portion of the trough that bends and extends needs strength such as a corner portion of the gutter path. It is characterized by pouring concrete in the hollow inside of the gutter wall.

A thirteenth invention, when constructing the steel gutter wall according to any one of the first to twelfth inventions, constructs the members constituting the steel gutter wall as a gutter wall unit, and makes a plurality of them on site. It is characterized in that a pair of gutter wall units are installed on the floor surface to construct a steel gutter wall.

[0033]

According to the present invention, in a gutter for the flow of high temperature fluid such as hot metal or slag installed in the casting floor of a blast furnace, the gutter wall is a combination of a plurality of square steel pipes and a square steel pipe. Steel troughs with hollow parts are constructed by combining plates, H-shaped steels, H-shaped steels and plates, grooved steels and plates, etc. Since it can be configured only by cutting and joining, it is easy to process, manufacture, and prefab in the factory, and it is only necessary to stand upright at the construction site. Is unnecessary, construction period
It is possible to suppress an increase in cost.

Further, by utilizing the fact that it is easy to process, manufacture, and prefab in a factory by cutting and joining steel members such as square steel pipes, several steel gutter wall members such as the square steel pipes are used. Unit construction or block construction, which is joined in units, is possible, and labor saving on site work is further possible.

Further, by installing a slit on the inner side portion of the gutter groove of a steel gutter wall member such as a square steel pipe, the thermal expansion of the steel material can be easily absorbed, and further, by closing the slit with tape, Protects foreign materials such as ballasts and refractories from entering the steel pipe. Further, thermal expansion of the steel gutter wall can be easily absorbed by forming an expansion absorption margin due to thermal expansion in the connecting portion between the unit members constituting the steel gutter wall.

Further, since high temperature fluid such as hot metal or slag pushes the trough wall at the corners of the trough wall that bends and undulates, strength is required, but at this portion, the internal space of the steel trough wall is required. Strength can be strengthened by filling the inside with concrete.

Further, there is relaxation of the allowable temperature condition and improvement of heat transfer efficiency (to release heat) by applying a square steel pipe as the gutter wall.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing a concrete example of a steel trough structure body according to an embodiment of the present invention, and FIG. 2 is a schematic perspective view of a steel trough wall structure body.

FIG. 1 shows a steel trough structure body. In FIG. 1, a steel gutter wall 23 made of ordinary steel or fireproof steel plate is constructed on the floor surface 15 to construct a gutter wall.

The concrete structure of the steel trough wall 23 is (1) square steel pipe, (2) combination of column and plate, (3) combination of H-section steel and H-section steel, (4) H-section. There are combinations of steel and plates, (5) combinations of channel steel and plates, etc., which will be described in detail in order.

FIG. 2 is a basic schematic view of the steel trough wall structural body, and in the figure, an example of the rectangular steel pipe 24 for trough wall is shown. As shown in the figure, a plurality of gutter wall square steel pipes 2 are provided on both sides of the gutter body 1.
A steel gutter wall 23 is formed by arranging the four 4 so that their side surfaces are in contact with each other. Also, the gutter 1a is about 1
Hot water (high-temperature fluid) from the blast furnace such as hot metal and slag at 500 ℃
If the water flows, the gutter wall side will be heated by 200 to
Since it becomes a high temperature of 300 ° C., the rectangular steel pipe 24 for the gutter wall may be largely thermally expanded and deformed. In this case, if the constituent members are fixedly joined, deformation due to thermal expansion of the constituent members is restrained, and a very large stress acts on the constituent members. This causes a problem that each component including the wall plate is buckled and easily broken.

In the present invention, as a countermeasure against the deformation of the steel trough wall due to the heat input from such a high temperature fluid, the joint portion should be stretched and absorbed (thermal expansion) between a plurality of trough rectangular steel pipes 24. Absorbing gap) and the square steel pipe for gutter wall 24
There is a case where a slit is formed in, and a case where these are combined. The gaps for absorbing thermal expansion may be formed between each square steel pipe 24, or may be formed every several pipes (details will be described later, such as gap closing means).

In the example shown in FIGS. 2 and 4, the gutter body 1
The thermal expansion absorbing slit 25 is formed by extending in the vertical direction along the central portion of the side wall of the rectangular steel pipe facing the side.
The groove width of the thermal expansion absorbing slit 25 may be an appropriate width, and the end portion of the groove may extend to the end edge of the rectangular steel pipe, or may stop before the end portion. The slit 25 is preferably closed with tape. Details of the slit 25 will be described later.

A more specific description will be given with reference to FIG. 3 and 4 show a square steel pipe 24 for a gutter wall as a first example of the steel gutter wall 23. FIG. 3 (A) shows, as a basic form, a rectangular steel pipe for troughs 24 having no slits. A plurality of rectangular steel pipes for trough 24, six in the figure, are welded to each other. Integral with the gutter wall unit 24
An example of a is shown. In this way, a gutter wall unit 24a including a plurality of gutter wall rectangular steel pipes 24 is manufactured in advance in a factory,
It is advisable to carry a plurality of units 24a to the installation location and install each unit to build a steel gutter wall 23.

In this case, as shown in FIG. 3A, it is preferable to form a thermal expansion absorbing gap (expansion absorbing margin) 32 between the adjacent gutter wall units 24a. As a means for closing the thermal expansion absorbing gap (extension absorbing margin) 32, for example, as shown in the drawing, one of the adjacent gutter wall units 2
A gap blocking plate 33 is installed on the side surface of the gutter wall rectangular steel pipe 24 at the end of 4a on the gutter side and extends vertically. The gap closing plate 33 closes the gap 32, and slidably contacts the gutter-side side surface of the rectangular gutter wall rectangular steel pipe 24 at the end of the other adjacent gutter wall unit 24a. Therefore, the gap closing plate 3 is always provided.
Since the gap 32 is closed at 3, the ballast / refractory does not flow out of the wall, and when the gutter wall square steel pipe 24 thermally expands, the gap closing plate 33 causes the other gutter wall square steel pipe 24 By contacting the side surface on the side of the gutter and allowing the side wall to slide freely, no unreasonable stress is generated in the square steel pipe 24 for the gutter wall.

FIG. 3B shows an example in which the lower end of the square steel pipe 24 for a gutter wall is adjusted in height and installed on the floor surface 15 in a concrete embedded type gutter.
In the figure, the lower end of the square steel pipe 24 for gutter wall is closed by a bottom plate 27. The square steel pipe for gutter wall 24 is temporarily supported at a predetermined height, and a height adjusting mortar 28 is filled between the floor surface 15 and the bottom plate 7 to adjust the height. An anchor bar 29 extending in the back direction is welded to the rear side (anti-gutter side) at the lower end of the rectangular steel pipe for gutter wall 24, and a concrete layer is formed on the floor surface 15 so that the anchor bar 29 is embedded. Place 30. Also, it is effective to reinforce the concrete layer 30 by placing a lightweight concrete 31 or the like on the upper portion thereof.

In this way, the rectangular steel pipe for gutter wall 24 is
The concrete layer 30 is installed at a predetermined height by the height-adjusting mortar 28 and the anchor layer 29 is interposed between the concrete layer 30 and the concrete layer 30.
It is firmly fixed by the lightweight concrete 31 on the top.

FIG. 4A shows the same trough wall unit 2 as in FIG.
4a, an example in which a thermal expansion absorbing slit 25 is formed by vertically extending in the center of the side surface of the gutter wall square steel pipe 24 on the side of the gutter groove is shown. The slit 25 is closed by a tape 34 such as a steel tape. The slit 25 can absorb the thermal expansion of the gutter wall rectangular steel pipe 24 in the gutter flow direction, and the slit 25 is closed by the tape 34, so that foreign matters such as ballast and refractory enter the rectangular steel pipe. Never. As shown in FIG. 4 (B), the slit 25 is opened up to before reaching the end of the rectangular steel pipe, and FIG. 4 (C).
There is a case where it is opened until it reaches the end of the square steel pipe as described above, and it is advisable to select it depending on the implementation situation.

5A and 5B show second and third examples of the steel gutter wall 23. FIG. 5A shows a column / plate combination trough wall 35. Column and plate combination gutter wall 3
5 is configured by arranging square steel pipes 35a at a predetermined interval and connecting adjacent square steel pipes 35a by welding 36 with two connecting plates 35b arranged in parallel.

FIG. 5B shows an H-shaped steel combination trough wall 37. The H-shaped steel combination trough wall 37 includes a plurality of H-shaped steels 37a,
The flanges are arranged such that both side edges are in contact with each other, and the contact edges are fixed by welding 26 at a plurality of positions in the vertical direction.

FIGS. 6A and 6B show a fourth example and a fifth example of the steel gutter wall 23. FIG. 6 (A) shows an H-section steel, plate combination trough wall 38. In this H-shaped steel and plate combination trough wall 38, a plurality of H-shaped steels 38a are arranged in parallel at predetermined intervals, and plates 38b are arranged between them, and both side edges of the flange of the H-shaped steel 38a and the plate 38b. Both side edges are fixed by welding 36.

FIG. 6B shows a channel steel and plate combination trough wall 39. This channel steel, plate combination gutter wall 39
Arranges a plurality of grooved steels 39a in parallel at predetermined intervals so that the grooves and the backs face each other, and plates 39b are provided on both flange side surfaces of each grooved steel 39a.
Are arranged on both sides of the flange of the channel steel 39a and the plate 3
The contact portion 9b is fixed by welding. Plate 3
9b are provided with thermal expansion absorbing slits 25 at appropriate intervals.

The construction of each part in the steel gutter wall 23 shown in the first to fifth examples may be changed appropriately and implemented. For example, the welding location and the welding method are arbitrary, and the thermal expansion absorption The slits 25 may be appropriately opened, and a plurality of sets of respective constituent members may be integrally joined to form a unit.

Next, FIG. 7 shows a form of arrangement at the corners of the square steel pipe 24 for gutter wall. 7 (A) and 7 (B) show the case where the square steel pipe 24 for a gutter wall is bent at a right angle. In this case, it is advisable to join the two side surfaces of the gutter wall rectangular steel pipe 24, which are bent at a right angle, to the two right side surfaces of the gutter wall rectangular steel tube 24 by welding 26 to the side surfaces of the gutter wall extending in the direction perpendicular to each other.

FIG. 7C shows a case where the rectangular steel pipe for gutter wall 24 is bent at a predetermined angle to form a corner 47a. In this case, the side walls of the two adjacent square steel pipes of the corner portion 47a that bends at an angle of 90 ° or more cannot make surface contact with each other, and in this case, the metal fitting 4 as shown in FIG.
0 and the joining hardware 41 are arranged to form a corner connecting portion. Both the metal joint 40 and the metal joint 41 are metal plates that are vertically long and have a predetermined width, and both sides of the central portion are bent. In the case of the joint metal fitting 40, the both side bent portions are fixed by welding to one side surface of the left and right rectangular steel pipes for gutter wall 24 which intersect at an angle. It is fixed by welding to the other side surface of the square steel pipes 24 for the left and right gutter walls which intersect with each other. As described above, the steel trough wall 23 can be constructed by smoothly connecting the trough wall rectangular steel pipes 24 at the corners regardless of the angle of the trough wall.

Rectangular steel pipe for gutter wall 24 and other first to fifth examples
In each of the steel gutter walls 23 in the example, it is preferable that the inner space of the gutter wall is filled with concrete or the like as needed to improve the strength at a portion where strength is required, such as a corner portion of the gutter path.

FIGS. 8A and 8B show a square steel pipe 2 for a gutter wall.
Another example of the angle guide type is shown as another method of connecting the lower end of 4 and the floor surface 15. In this embodiment, as shown in the figure,
The level adjusting hardware 42 and the anchor bolt 43 are erected on the floor surface 15. The anchor bolt 43 is fixed to the floor surface 15 by fitting an opening bolt hole in the horizontal portion of the angled metal piece 44 with a rib and fastening a nut from the upper side of the horizontal portion.

Then, by applying the center portion of the bottom plate 27 of the square steel pipe 24 for gutter wall to the upper end of the level adjusting hardware 42,
The height of the gutter wall 24 can be adjusted. Further, the vertical portion of the angled metal fitting 44 with ribs is applied to the lower end portion of the rectangular steel pipe for trough 24, and at the abutting portion, the rectangular steel pipe for trough 24 for trough 24 is applied from the outside through a washer with a bolt 45. Can be fixed to the angle metal fitting 44. In addition, as shown in FIG.
5 and the base plate fixed to the lower end of the square steel pipe 24 for the gutter wall
Height adjustment mortar 28 (or metal object) with 7a
Is installed to adjust the height, the nut 9 is fastened to the anchor bolt 22 planted on the floor surface 15 by penetrating the base plate 7a and the height adjusting mortar 28, and the floor plate 15 is fitted with a square steel pipe 24 for a gutter wall. May be fixed.

FIG. 10 shows an example of a top plate 46 that closes the upper end of the square steel pipe 24 for a gutter wall. Although the top plate 46 may be provided individually for each rectangular steel pipe, when the trough wall unit 24a is configured, one top plate 46 extending over a plurality of rectangular steel pipes configuring the unit. You may comprise. Gutter lid 1 so that both ends ride on the top plate 46 of the left and right steel gutter walls 16.
2 is placed.

The present invention may be implemented by changing the design of the components shown in the embodiments as needed.

[0062]

EFFECTS OF THE INVENTION According to the present invention, it is possible to solve the problems of the conventional steel gutter wall structure in terms of heat resistance and workability, while achieving cost reduction and construction period reduction required for blast furnace repair (construction). be able to.

That is, according to the present invention, in a gutter for flowing a high temperature fluid such as hot metal or slag installed in a casting floor of a blast furnace, the gutter wall is a gutter wall having a hollow portion such as a plurality of square steel pipes. Since the members are erected, they can be constructed only by cutting and joining the gutter wall members, facilitating processing, manufacturing and prefabing at the factory. Is unnecessary, and the increase in construction cost can be suppressed.

Further, by utilizing the fact that it is easy to process, manufacture, and prefabricate a gutter wall member such as a square steel pipe in a factory only by cutting and joining, a few gutter wall members such as the square steel pipe can be used. It is possible to construct blocks that can be joined together by, and it is possible to further save labor in the field work.

Further, in the trough wall member such as a square steel pipe, by forming a slit on the side portion on the side directly receiving the heat from the high temperature fluid flowing in the trough, the thermal expansion of the steel material can be easily absorbed, Further, by closing the slit with tape, it is possible to protect foreign matter such as a ballast or refractory from entering the internal space of the trough wall member. Further, thermal expansion of the steel gutter wall can be easily absorbed by forming an expansion absorption margin due to thermal expansion in the connecting portion between the unit members constituting the steel gutter wall.

Further, since high temperature fluid such as hot metal or slag pushes the gutter wall in the corner portion of the gutter that extends in a curving manner, the gutter wall needs strength, but at this part, the square steel pipe is used. It can be reinforced by filling the hollow interior of the gutter wall member with the inside of the concrete.

Further, in the present invention, there is a relaxation of the allowable temperature condition and an improvement in heat transfer efficiency (to release heat) by applying a steel trough member such as a square steel pipe.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a specific example of a steel gutter structure body according to an embodiment of the present invention.

FIG. 2 is a schematic perspective view of a steel trough structure body.

FIG. 3 (A) is a perspective view of a gutter wall unit made up of a plurality of gutter wall rectangular steel pipes without slits as a first example of a steel gutter wall, and FIG. It is an expanded sectional view which shows an example of concrete embedding type as a joint structure of a steel pipe lower end part and a floor.

FIG. 4A is a perspective view of a steel gutter wall according to a second example,
(B) is a perspective view of a first example of a slit for thermal expansion absorption,
(C) is a perspective view of a second example of the slit.

5A and 5B are perspective views of a steel gutter wall according to a third example and a fourth example.

6 (A) and 6 (B) are perspective views of a steel gutter wall according to a third example and a fourth example.

7A and 7B are plan views showing a joint structure of a gutter wall at a corner portion when the gutter groove bends at a predetermined angle.

8 (A) and 8 (B) are an enlarged cross-sectional view and a plan view showing an example of an angle guide type mounting structure of a square steel pipe for a gutter wall and a floor surface.

FIG. 9 is an enlarged cross-sectional view showing another example of the attachment structure of the lower end of the rectangular steel pipe and the floor.

10A and 10B are a side view and a plan view showing an attachment mode of a top plate attached to an upper end of a square steel pipe for a gutter wall,
(C) is a side view of the connecting part between the upper end of the rectangular steel pipe for the gutter wall and the gutter lid.

FIG. 11 is a perspective view of a conventional reinforced concrete gutter wall structure.

FIG. 12 is a cross-sectional view of a conventional beam / floor reinforced concrete gutter wall structure.

FIG. 13 is a cross-sectional view of a conventional steel gutter wall structure.

[Explanation of symbols]

1 gutter body 1a gutter 2 gutter wall 4 floors 9 nuts 12 gutter lid 13 operating floor 14 Steel beam 15 floor 16 steel gutter wall 17 horizontal furry 18 props (vertical furring) 19 steel columns 20 Upper beam 22 Anchor bolt 23 Steel gutter wall 24 Rectangular steel pipe for gutter wall 25 Slits for absorbing thermal expansion 26 Welding 27 Bottom plate 27a Base plate 28 Height adjusting mortar 29 Anchor muscle 30 concrete layers 31 concrete layer 32 Gap for absorbing thermal expansion 33 Gap blocking plate 34 tapes 35 column, plate combination gutter wall 35a square steel pipe 35b connection plate 36 welding 37 H section steel combination gutter wall 37a H section steel 38 H section steel, plate combination gutter wall 39 Channel steel, plate combination gutter wall 40 Bonding hardware 41 Joining hardware 42 level adjustment hardware 43 anchor bolt 44 angle hardware 45 volts 46 Top plate 47 corners 47a Corner

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kenichi Nakatsu             20-1 Shintomi, Futtsu City Nippon Steel Co., Ltd.             Inside the surgical development headquarters (72) Inventor Shinji Yoriko             5-3 Tokai-cho, Tokai-shi Nippon Steel Corporation             Inside Nagoya Steel Works F-term (reference) 4K015 EC01 EC08 EC10

Claims (13)

[Claims] 1. In a gutter installed on a casting bed of a blast furnace and in which a high-temperature fluid such as hot metal and slag flows, a gutter wall arranged in a direction perpendicular to the gutter flow direction is provided with a plurality of square-shaped gutters on the casting bed. A steel trough wall structure characterized by being constructed by vertically arranging steel pipes next to each other. 2. Instead of the gutter wall structure according to claim 1, wherein a plurality of square steel pipes are vertically installed adjacent to each other, square steel pipes are arranged at a predetermined interval, and the corners are adjacent to each other with a predetermined space. A steel trough wall structure body, which is configured by connecting two shaped steel pipes by welding with two connecting plates arranged in parallel. 3. Instead of the gutter wall structure according to claim 1, wherein a plurality of square steel pipes are erected adjacent to each other, a plurality of H-shaped steels are arranged such that both side edges of the flanges are in contact with each other, and the contact is made. A steel trough structure body characterized in that its edges are fixed by welding. 4. In place of the gutter wall structure according to claim 1, wherein a plurality of square steel pipes are erected adjacent to each other, a plurality of H-shaped steels are arranged in parallel at a predetermined interval and a plate is provided therebetween. The steel trough wall structure body is characterized in that the two side edges of the flange of the H-shaped steel and the both side edges of the plate, which are adjacent to each other at a predetermined interval, are fixed by welding. 5. Instead of the gutter wall structure according to claim 1, wherein a plurality of square steel pipes are erected adjacent to each other, a plurality of grooved steels are arranged at predetermined intervals so that the grooves and the backs alternately face each other. The steel trough structure body characterized in that the plates are arranged on both side surfaces of each flange of each channel steel, and the abutting portions of the flange side surfaces and the plate are fixed by welding. . 6. The steel gutter wall according to any one of claims 1 to 5, wherein a slit for thermal expansion of the gutter wall is vertically extended and provided on a side surface located on the gutter groove side. The steel trough structure body characterized by the above. 7. The steel trough wall structure body according to claim 6, wherein the slits for absorbing thermal expansion are closed with a tape. 8. A stretch absorbing band due to thermal expansion of the steel gutter wall is formed in a connecting portion between the unit members constituting the steel gutter wall according to claim 1. Steel trough structure frame to be. 9. The steel gutter wall according to claim 1, wherein a lower end portion of the steel gutter wall is embedded and fixed in a concrete layer cast on the floor surface via an anchor bar. Steel trough structure frame to be. 10. A steel gutter wall structure body, wherein a lower end portion of the steel gutter wall according to any one of claims 1 to 8 is fixed on a floor surface via a base plate. 11. A steel trough structure frame body, wherein a lower end portion of the steel trough wall according to any one of claims 1 to 8 is fixed on a floor surface through an angle metal fitting. . 12. The steel gutter wall according to any one of claims 1 to 11, wherein at a portion requiring strength such as a corner portion in a bending and extending trough, the steel gutter wall of the steel gutter wall is provided. A steel gutter wall structure characterized by placing filled concrete inside the hollow. 13. When constructing the steel gutter wall according to any one of claims 1 to 12, a member constituting the steel gutter wall is configured as a gutter wall unit, and a plurality of sets of gutters are constructed on site. A method of constructing a gutter wall, characterized by installing a wall unit on the floor to construct a steel gutter wall.