JP3971285B2 - Frame structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a frame structure for replacing an existing device installed on a frame formed by assembling a column member and a beam member with a new device of a different type.
[0002]
[Prior art]
Generally, in a boiler plant, an air preheater for preheating air introduced into the boiler body by the heat of exhaust gas discharged from the boiler body is installed. The air preheater is mainly an element fixed type. Air preheaters (so-called Rotemulet type air preheaters) and element rotation type air preheaters (so-called Jungstrom type air preheaters) are employed.
[0003]
FIG. 4 is a plan view showing an example of a frame in which an element-fixed air preheater is installed as existing equipment, and beam members 3, 4, 5 are hung between standing column members 1, 2. A frame 6 is constructed by providing it so that it is handed over. An element-fixed air preheater 7 as an existing device is installed on the frame 6 so that its load support point P1 is positioned on the beam member 4. It is. In FIG. 4, reference numeral 4a denotes a level adjusting liner installed on the beam member 4, and an element fixed air preheater 7 is placed on the liner 4a.
[0004]
In the frame 6 as described above, the load of the element-fixed air preheater 7 as the existing equipment acting on the load support point P1 is applied to the legs of the column members 1 and 2 from the beam member 4 through the beam members 3 and 5. It is transmitted to the part and acts on the foundation (not shown) as a foundation load.
[0005]
By the way, when an element-fixed air preheater 7 as an existing device is replaced with an element rotary air preheater as a new device, the load support point changes due to the structure of the air preheater. In this concept, the existing beam members 4 and 5 are removed and another beam member is added, so that the basic load transmitted to the legs of the column members 1 and 2 is equivalent to the original state before construction. Will do.
[0006]
Such construction has not been performed at all, and there is no known patent document.
[0007]
[Problems to be solved by the invention]
However, as described above, when the existing beam members 4 and 5 are removed and another beam member is additionally installed, the basic load transmitted to the leg portions of the column members 1 and 2 is completely different from the original state before construction. While it is difficult to make the same, the beam passing through the limited space in the frame 6 is limited, so the level of the beam member to be additionally installed must be higher than that of the existing beam member 3, and In addition, a horizontal truss or the like must be provided to project outward against the long-term and short-term horizontal force generated at the load support point of the element rotary air preheater as a new equipment. )) Could not be used.
[0008]
In view of such a situation, the present invention can leave the existing beam member to make the basic load transmitted to the leg portion of the column member exactly the same as the original state before the modification, and can maintain the existing maintenance. It is intended to provide a frame structure that can be used as it is.
[0009]
[Means for Solving the Problems]
The present invention is a frame structure for replacing existing equipment installed on a frame constructed by assembling column members and beam members with new equipment of a different type,
By placing the ring beam via the existing liner and the level adjusting liner on the load support point of the existing equipment on the existing beam member on the frame , and installing the new equipment on the ring beam, The frame structure according to the present invention is configured to transmit the load of the new equipment acting on the ring beam to the load support point of the existing equipment on the beam member .
[0010]
According to the above means, the following operation can be obtained.
[0011]
The load of the new equipment is transmitted to the load support point of the existing equipment on the existing beam members on the frame via the ring beam placed on the structure via the existing liner and the level adjustment liner. Therefore, unlike the case where an existing beam member is removed and another beam member is additionally installed, the foundation load transmitted to the leg portion of the column member is substantially the same as the initial state before the modification.
[0012]
In the frame structure, the cross-sectional shape of the ring beam can be made into a box shape. In this way, the long-term and short-term horizontal force generated at the load support point of the element rotary air preheater as a new equipment can be reduced. On the other hand, it is not necessary to provide a horizontal truss or the like so as to protrude outward, and an existing maintenance scaffold can be used.
[0013]
In the frame structure, the existing equipment can be an element-fixed air preheater, and the new equipment can be an element rotary air preheater.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described together with illustrated examples.
[0015]
1 to 3 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 4 denote the same components, and the basic configuration is the conventional configuration shown in FIG. As shown in FIGS. 1 to 3, the feature of the illustrated example is that it is newly installed with respect to the load support point P1 of the element-fixed air preheater 7 as the existing equipment on the frame 6, as shown in FIGS. It is in the point which provided the ring beam 9 which transmits the load of the element rotary type air preheater 8 as an apparatus.
[0016]
In the case of this illustrated example, the load of the element rotating type air preheater 8 as the new equipment is applied to the load support point P2 on the ring beam 9, but as shown in FIGS. The ring beam 9 is placed on the load support point P1 of the element-fixed air preheater 7 in the existing beam member 4 via the existing liner 4a and the level adjusting liner 10. The load acting on the load support point P2 is transmitted to the existing beam member 4 of the frame 6.
[0017]
The ring beam 9 has a box-shaped cross section as shown in FIGS. 2 and 3, and a reinforcing rib 11 is attached to the inside of the ring beam 9 corresponding to the load support point P1. A backing metal 12 is attached as necessary.
[0018]
Next, the operation of the illustrated example will be described.
[0019]
The load of the element rotating type air preheater 8 as the new equipment acts on the load support point P2 on the ring beam 9, but the element fixed type as the existing equipment on the frame 6 via the ring beam 9. Since it is transmitted to the load support point P1 of the air preheater 7, it is transmitted to the leg portions of the column members 1 and 2, unlike the case where the existing beam members 4 and 5 are removed and another beam member is additionally installed. The foundation load is almost the same as the original construction before remodeling.
[0020]
In addition, in the illustrated example, the ring beam 9 has a box-shaped cross section, so that the horizontal and short-term horizontal forces generated at the load support point P2 of the element rotary air preheater 8 as a new equipment are horizontal. It is not necessary to provide a truss or the like so as to project outward, and an existing maintenance scaffold (not shown) can be used.
[0021]
In this way, the existing load members 4 and 5 can be left, and the basic load transmitted to the legs of the column members 1 and 2 can be made substantially the same as the original construction before the modification, and the existing maintenance scaffold can be used. Can be used as is.
[0022]
It should be noted that the frame structure of the present invention is not limited to the illustrated examples described above, and it is needless to say that various modifications can be made without departing from the scope of the present invention.
[0023]
【The invention's effect】
As described above, according to the frame structure of the present invention, the existing load member is left and the basic load transmitted to the leg portion of the column member is installed by installing new equipment having a load support point different from that of the existing equipment. also, it can be substantially the same as the beginning of the construction of the state before the remodeling, also, an excellent effect of being able to directly take advantage of the existing maintenance scaffolding.
[Brief description of the drawings]
FIG. 1 is a plan view of an example of an embodiment for carrying out the present invention.
FIG. 2 is a partial cross-sectional view of a ring beam according to an example of an embodiment of the present invention, corresponding to a cross section taken along the line II-II in FIG.
FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;
FIG. 4 is a plan view showing an example of a frame in which an element fixed type air preheater as an existing device is installed.
[Explanation of symbols]
1 Column member 2 Column member 3 Beam member 4 Beam member 5 Beam member 6 Frame 7 Element fixed type air preheater (existing equipment)
8 Element rotary air preheater (new equipment)
9 Ring beam P1 Load support point P2 Load support point

Claims (3)

A frame structure for replacing existing equipment installed on a frame constructed by assembling column members and beam members with new equipment of a different type,
By placing the ring beam via the existing liner and the level adjusting liner on the load support point of the existing equipment on the existing beam member on the frame , and installing the new equipment on the ring beam, A frame structure characterized in that a load of a new device acting on the ring beam is transmitted to a load support point of an existing device on the beam member .   The frame structure according to claim 1, wherein the cross-sectional shape of the ring beam is a box shape.   The frame structure according to claim 1 or 2, wherein the existing equipment is an element fixed air preheater, and the new equipment is an element rotary air preheater.

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