JPH08226606A - Supporting structure of heat-transfer pipe for boiler - Google Patents

Abstract

PURPOSE: To provide the title structure which prevents metallic supports from being damaged by burning, by making them in the minimum size, which prevents each supporting leg from being separated from each of them according as supporting pipes are bent toward the direction breaking away from both a heat-transfer pipe to be supported and heat-transfer pipes in proportion to the elongation of the supporting pipes, and which keeps both the heat-transfer pipe to be supported and the heat-transfer pipes from falling. CONSTITUTION: Two supporting pipes 6 which are suspended down from above and between which both faces of a panel 5 composed of heat-transfer pipes 4 are held, are arranged in zigzag shape so as to mutually intersect to the faces of the panel 5, between a heat-transfer pipe 4s to be supported and the heat-transfer pipe 4 at the underside of the tube 4s, and so as to interlace the faces of the panel 5. Metallic supports 7 are put in place being on the upper side of points (O and O') where the two supporting pipes intersect with each other, and each supporting leg 8 to be engaged with each of the metallic supports 7 is fixed on the undersurface of the pipe 4s.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat transfer tube support structure for a boiler.

[0002]

2. Description of the Related Art Generally, a boiler includes a furnace 1 and a rear heat transfer section 2 as shown in FIG. 7, and a high temperature combustion gas 3 generated by burning a fuel in the furnace 1 is transferred to the rear heat transfer section 2 of the furnace. To heat the fluid flowing in the panel 5 composed of a large number of heat transfer tubes 4 arranged in the rear heat transfer section 2.

The heat transfer tube 4 is, as shown in FIG.
The panel 5 is formed by vertically arranging horizontally in a zigzag pattern at required intervals in the vertical direction, and the supported heat transfer tubes 4s at a plurality of required positions in the vertical direction of the panel 5 are suspended from above as shown in FIG. The two support pipes 6 extending substantially straight are supported by the support fittings 7 attached to the support pipes 6 and the support legs 8 attached to the lower surface of the supported heat transfer pipe 4s, and the support is provided. The heat transfer tube 4 disposed above the supported heat transfer tube 4s supported by the tube 6 is fixed to the support seat 9 fixed to the upper surface of the heat transfer tube 4 (including the supported heat transfer tube 4s) and the lower surface of the heat transfer tube 4. Leg member 1
0 and 0, and the structure is such that they are sequentially stacked and supported on the supported heat transfer tubes 4s.

[0004]

However, in the conventional support structure for the heat transfer tube 4 as described above, the support metal fitting 7 protruding from the support tube 6 extending substantially vertically is inevitably large, and the support tube is inevitable. Since the support fitting 7 is not sufficiently cooled by the cooling medium such as water flowing in the support 6,
There is a possibility that the temperature of the support fitting 7 exposed to the combustion gas 3 having a high temperature of 00 ° C. or higher rises to about 620 ° C. to 700 ° C. and burns, and the supported heat transfer tubes 4 s and the heat transfer tubes 4 fall off. Further, even when the support tube 6 is curved in the direction away from the supported heat transfer tube 4s due to the expansion of the support tube 6 due to the heat of the high-temperature combustion gas 3, the support leg 8 is disengaged from the support fitting 7. There was a possibility that the supported heat transfer tube 4s and the heat transfer tube 4 would fall off.

In view of the above situation, the present invention makes it possible to minimize the size of the support fitting to prevent the support fitting from burning out, and separate the support fitting from the supported heat transfer tube and the heat transfer tube due to the extension of the support tube. An object of the present invention is to provide a heat transfer tube support structure for a boiler, which can prevent the support leg from being detached from the support fitting due to the bending of the support tube in the direction, and can prevent the supported heat transfer tube and the heat transfer tube from falling off.

[0006]

SUMMARY OF THE INVENTION According to the present invention, a supported heat transfer tube at a plurality of required positions in the vertical direction of a panel formed by horizontally arranging a large number of heat transfer tubes in a vertical direction at predetermined intervals in a zigzag shape is provided from above. A transfer which is supported above a supported heat transfer tube supported by the support tube via a support fitting attached to the suspended support tube and a support leg attached to the lower surface of the supported heat transfer tube. A heat transfer tube support structure for a boiler configured to support a heat tube in a form of being sequentially stacked on the supported heat transfer tube via a support seat fixed to the heat transfer tube upper surface and a leg member fixed to the heat transfer tube lower surface, Two support tubes are hung from the upper side so as to face each other with the panel surface of the heat transfer tube interposed therebetween, and the two support tubes are provided on the panel surface between the supported heat transfer tube and the heat transfer tube disposed below the heat transfer tube. Panel surface so that they intersect each other It is arranged in a zigzag manner so as to be sewn, a supporting metal fitting is attached to a required position above the intersection of the both supporting pipes, and a supporting leg engaging with the supporting metal fitting is attached to a lower surface of the supported heat transfer tube. It is a thing.

[0007]

Therefore, the two support pipes do not extend straight vertically as in the conventional case, but wrap around to the lower side of the supported heat transfer pipe, and the size of the support metal fittings attached to the support pipe does not have to be increased. Since the supporting metal fitting is sufficiently cooled by a cooling medium such as water flowing in the supporting pipe, the supporting metal fitting is
Even if exposed to high-temperature combustion gas, it will not rise to a temperature at which it burns out, and there is no risk of the supported heat transfer tubes and heat transfer tubes falling off.The support tubes are staggered by sewing the panel surface. Since the support tube is arranged so as to be bent in the direction away from the panel surface at an arbitrary supported heat transfer tube position due to the expansion of the support tube due to the heat of the high-temperature combustion gas, the support tube is covered with the above-mentioned cover tube. On the contrary, the portion extending to the lower side of the support heat transfer tube moves in the direction closer to the panel surface and is restrained by the panel, and the bending in the direction away from the panel surface due to the extension of the support tube is minimized. It is also possible to prevent the supported heat transfer tube and the heat transfer tube from falling off due to the support legs coming off the support fitting.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 6 show one embodiment of the present invention,
In the drawings, the parts denoted by the same reference numerals as those in FIGS. 7 to 10 represent the same things, and the supported heat transfer tubes 4s at a plurality of required positions in the vertical direction of the panel 5 are supported by the support tubes 6 suspended from above. Above the supported heat transfer tube 4s supported by the support tube 6 while supporting it through a support metal fitting 7 attached to the support tube 6 and a support leg 8 attached to the lower surface of the supported heat transfer tube 4s. Heat transfer tube 4
Via the support seat 9 fixed to the upper surface of the heat transfer tube 4 (including the supported heat transfer tube 4s) and the leg member 10 fixed to the lower surface of the heat transfer tube 4 in order to be sequentially stacked on the supported heat transfer tube 4s. The basic structure of supporting the heat transfer tube 4 is similar to that of the conventional one shown in FIGS. 7 to 10, but the feature of this embodiment is that the heat transfer tube 4 is arranged from above as shown in FIGS. Two support tubes 6 are hung so as to be opposed to each other with the panel 5 surface sandwiched between the support heat transfer tubes 4 s and the heat transfer tubes 4 arranged below the support heat transfer tubes 4 s. The panels 5 are sewn in a zigzag manner so as to intersect each other with respect to the planes, and the support metal fittings 7 are attached to the intersections (O points and O'points described later) above the both sides of the support tubes 6 at required positions. A point at which support legs 8 that engage with the support fitting 7 are attached to the lower surface of the supported heat transfer tube 4s. It is in.

In this embodiment, two support tubes 6 are hung from above so as to face each other with the panel 5 surface of the heat transfer tube 4 sandwiched therebetween, at the required position A above the supported heat transfer tube 4s. The two support tubes are bent at a required position B laterally of the supported heat transfer tube 4s while maintaining a state of being substantially parallel to the five surfaces and bending downward so as to be separated from each other along the panel 5 surface at a required inclination angle α. 6 extends downward at a required inclination angle β along a plane orthogonal to the plane of the panel 5 and is located at a required position O between the supported heat transfer tube 4s and the heat transfer tube 4 arranged below the panel 5. The surfaces are bent so as to intersect with each other, and both support tubes 6 are held in a state substantially parallel to the surface of the panel 5 at a required lateral position C of the heat transfer tube 4 disposed below the supported heat transfer tube 4s. While in the direction of approaching each other along the surface of panel 5 Is bent so as to extend downward at an inclination angle α of, and further, both support tubes 6 at a required position D below the heat transfer tube 4 disposed below the supported heat transfer tube 4s,
So that it hangs in a form of facing each other across the panel 5 side,
The support fitting 7 is attached at a predetermined position above the intersection (point O) of the support tubes 6 while being bent, and the support legs 8 engaging with the support fitting 7 are attached to the lower surface of the supported heat transfer tube 4s.

Incidentally, basically, between the supported heat transfer tube 4s and the heat transfer tube 4 arranged below the support heat transfer tube 4, both support tubes 6 cross each other with respect to the panel 5 surface. As shown in the lower part of FIG. 2 and FIG. 3, the panel 5 surface of the heat transfer tube 4 is located above the support heat transfer tube 4s and the heat transfer tube 4 arranged below the support heat transfer tube 4s. The two support pipes 6 suspended so as to be opposed to each other across the panel 5 are provided at a required position A ′ above the supported heat transfer pipes 4s along the panel 5 face while maintaining a state substantially parallel to the panel 5 face. The support tubes 6 are bent so as to extend downward at a required inclination angle α in directions away from each other, and both support tubes 6 are inclined at a required lateral position B ′ of the supported heat transfer tube 4s along a plane orthogonal to the panel 5 surface. Heat transfer that extends downward at an angle β'and that is provided below the supported heat transfer tube 4s. It is bent so as to be located on the surface of the panel 5 at a required position O'between the tube 4 and both support tubes 6 are hung from the point O'on the surface of the panel 5, and the supported heat transfer tube 4 is supported.
At a required position O ″ between s and the heat transfer tube 4 arranged below it, the support tubes 6 are distributed to both surfaces of the panel 5, and the support tubes 6 are directed downward from the point C ′ to the surface of the panel 5. The support metal fittings 7 are attached so as to be opposed to each other with the support metal fittings 7 sandwiched therebetween, and the support metal fittings 7 are attached to the required positions above the intersecting portions (points O ′) of the both support tubes 6, and the support metal fittings 7 are attached to the lower surface of the supported heat transfer tube 4s.
A support leg 8 that engages with is attached.

In the figure, reference numeral 11 denotes a bracket for preventing the support tubes 6 at points O'to O "from coming into contact with each other.

Since it is constructed as described above, the two support tubes 6
Does not extend straight vertically as in the past,
It becomes a shape to wrap around to the lower side of the supported heat transfer tube 4s, and the support tube 6
Since it is not necessary to increase the size of the support fitting 7 attached to the support pipe 7, the support fitting 7 is sufficiently cooled by a cooling medium such as water flowing in the support pipe 6, so that the support fitting 7 is a high temperature combustion gas 3 of 1000 ° C. or higher. Even if exposed to heat, the temperature does not rise to such a degree that it burns out, and there is no risk that the supported heat transfer tubes 4s and the heat transfer tubes 4 will fall out, and the support tubes 6 will be staggered by sewing the panel 5 surface. Since the support pipes 6 are arranged due to the heat of the high-temperature combustion gas 3 when the support pipes 6 are about to bend away from the surface of the panel 5 at an arbitrary supported heat transfer pipe 4s position, On the contrary, the portion of the support tube 6 extending below the supported heat transfer tube 4s moves in the direction approaching the panel 5 surface and is constrained by the panel 5 to separate from the panel 5 surface due to the extension of the support tube 6. Minimize bending in the direction Erare, support from the support bracket 7 feet 8
Also, the supported heat transfer tube 4s and the heat transfer tube 4 will not fall off.

In this way, the support fitting 7 can be made to have a minimum size to prevent the support fitting 7 from being burnt out, and the supported heat transfer tube 4s and the heat transfer tube 4 are separated from each other in accordance with the extension of the support tube 6. It is possible to prevent the support leg 8 from being detached from the support fitting 7 due to the bending of the support tube 6, and to support the supported heat transfer tube 4s and the heat transfer tube 4
Can be avoided.

The heat transfer tube support structure of the boiler of the present invention is
Of course, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made without departing from the scope of the present invention.

[0016]

As described above, according to the heat transfer tube support structure of the boiler of the present invention, the support fitting can be made to have a minimum size to prevent the support fitting from being burnt out, and the extension of the support tube can be prevented. With this, it is possible to prevent detachment of the supporting leg from the supporting metal fitting due to the bending of the supporting heat transfer tube and the supporting tube in the direction away from the supporting heat transfer tube, and to prevent the supported heat transfer tube and the heat transfer tube from falling off. Can play.

[Brief description of drawings]

FIG. 1 is a schematic view of an embodiment of a heat transfer tube support structure for a boiler of the present invention.

FIG. 2 is an enlarged view of a part II in FIG.

FIG. 3 is a view taken along the line III-III in FIG.

4 is a view taken in the direction of arrows IV-IV in FIG. 2;

5 is an enlarged view of a V portion of FIG.

FIG. 6 is an enlarged view of a portion VI in FIG. 3;

FIG. 7 is an overall schematic diagram showing a general boiler.

FIG. 8 is a schematic view showing an example of a conventional heat transfer tube support structure for a boiler (corresponding to VIII section in FIG. 7).

9 is an enlarged view of an IX portion in FIG.

10 is a view on arrow XX in FIG. 9. FIG.

[Explanation of symbols]

 4 heat transfer tube 4s supported heat transfer tube 5 panel 6 support tube 7 support metal fittings 8 support leg 9 support seat 10 leg member

Claims (1)

[Claims] 1. A supported heat transfer tube at a plurality of vertical required positions of a panel formed by horizontally arranging a large number of heat transfer tubes vertically in a zigzag pattern at required intervals, is attached to a support tube suspended from above. A heat transfer tube, which is supported above the supported heat transfer tube supported by the support tube and a support leg attached to the lower surface of the supported heat transfer tube, and fixed to the upper surface of the heat transfer tube. A heat transfer tube support structure for a boiler configured to sequentially support the supported heat transfer tubes by stacking them through a supporting seat and a leg member fixed to the lower surface of the heat transfer tube. The two support tubes that hang down so as to face each other are sandwiched between the support surface and the heat transfer tube that is disposed below the support heat transfer tube so that they intersect with the panel surface. Arranged in a staggered pattern Wherein is attached a support bracket to the intersection upper predetermined position of the two support tubes, the lower surface the supported heat transfer tubes, the heat transfer tube support structure of the boiler, characterized in that fitted with support legs engaging said support bracket.