JPH03241203A - Method of constructing boiler - Google Patents

Abstract

PURPOSE:To shorten a period of work by a method wherein a ceiling large beam, a hanging rod or a pipe etc. are constructed in parallel with a work period ranging from a starting of construction of the first stage iron frame to a completion of the second stage iron frame and an upper part of a main body of a boiler is constructed in parallel with a construction of the third stage iron frame. CONSTITUTION:A ceiling large beam 4 and a hanging rod 6 or a pipe etc. are constructed in respect to the first stage iron frame 1 in parallel with a period ranging from a starting of construction of the first stage iron frame 1 to the completion of the construction of the second stage iron frame 2. In addition, an upper part 7 of main body of a boiler is constructed through utilization of a hanging rod 6 or pipes etc. at the lower part of the ceiling large beam 4 hung over a top part of the second stage iron frame 2 in parallel with the construction of the third stage iron frame 3. With such an arrangement, a work period can be shortened and a construction of the ceiling beam 4 and the construction of an upper part 7 of the main body of the boiler are carried out at a lower location, resulting in that a work at an elevated location is reduced and also a dangerous state of the work can be reduced.

Description

[Detailed description of the invention] [Industrial application field 1 The present invention relates to a boiler construction method.

[Prior Art] A conventional boiler construction method will be explained with reference to FIGS. 15 and 16.

In the figure, 1 is the steel frame of the first stage, 2 is the steel frame of the second stage, 3
is the steel frame of the third stage, 4 is the ceiling beam fixed to the top of the third stage steel frame 3, 5 is the boiler body suspended and supported via a rope 6 suspended from the ceiling beam 4, and 7 is the boiler body suspended from the ceiling beam 4. The upper part of the boiler body, 8 is the lower part of the boiler body.

In the conventional boiler construction method, first, as shown in Figure 15, a first stage steel frame is constructed on the ground, and a second stage steel frame is placed on top of the first stage steel frame. 2, and a third stage steel frame 3 is constructed on top of the second stage steel frame 2.

If the boiler becomes larger, steel frames for the fourth, fifth, and so on stages will be built on top of the third stage steel frame 3.

Once the third stage steel frame 3 is constructed, a ceiling girder 4 is constructed on top of the third stage steel frame 3, as shown in Figure 16.
Furthermore, the upper part of the boiler main body 7 is constructed by suspending and supporting each component of the upper part of the boiler main body 7 via the roof beam 6 suspended from the ceiling girder 4, and finally, each component of the lower part of the boiler main body 8 is connected to the upper part of the boiler main body 7. The boiler body 5 is constructed by assembling the parts.

[Problem to be solved by the invention] However, the conventional boiler construction method has the following problems.

■ The work takes a long time because each piece of work is done in series.

■ All work after the construction of ceiling girder 4 will be done at height, which will be dangerous.

■ Workability is poor due to a lot of work being done at heights, and in addition to ■, the construction period becomes even longer.

In view of the above-mentioned circumstances, it is an object of the present invention to provide a boiler construction method that can shorten the construction period and reduce work at high places.

[Means for Solving the Problems] The present invention provides a boiler construction method in which a ceiling beam is supported by a steel frame assembled in three or more stages vertically, and a boiler main body is suspended and supported from the ceiling beam. After the construction of the second steel frame is completed, the construction of the second stage steel frame is started on top of the first stage steel frame, and from the start of construction of the first stage steel frame, the construction of the second stage steel frame is started. Until the construction of the first stage steel frame is completed, the ceiling beams, hanging rods, and pipes will be constructed on the first stage steel frame, and after the construction of the second stage steel frame is completed, a second stage will be installed on the top of the second stage steel frame. At the same time as starting the construction of the steel frames for the third and subsequent stages, the ceiling girder was lifted to the height of the second stage steel frame, and the suspension equipment and pipes at the bottom of the ceiling girder were removed. After assembling the upper part of the boiler main body, and after completing the construction of the steel frame for the third stage, lift the ceiling girder together with the upper part of the boiler body to the top of the steel frame of the third and subsequent stages, and attach the lower part of the boiler main body to the upper part of the boiler main body. The present invention relates to a boiler construction method characterized by assembling a boiler.

[Function] During the period from the start of construction of the first stage steel frame to the completion of construction of the second stage steel frame, ceiling girders, suspension rods and pipes are installed against the first stage steel frame in parallel. In parallel with the construction of the third stage steel frame, the upper part of the boiler body was installed using hanging rods and pipes at the bottom of the ceiling girder which was lifted to the top of the second stage steel frame. Since we decided to construct it, the construction period will be shortened.

In addition, since the construction of the ceiling girder and the construction of the upper part of the boiler body are performed at a low location, the need for work at heights is reduced, and therefore the risk of work is reduced.

Furthermore, work efficiency is improved because there is more work to be done in low places, and in addition to the above, the construction period is further shortened.

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

1 to 4 show an embodiment of the present invention.

In the figure, 1 is the steel frame of the first stage, 2 is the steel frame of the second stage, 3
is the steel frame of the third stage, 4 is the ceiling beam fixed to the top of the third stage steel frame 3, 5 is the boiler body suspended and supported from the ceiling beam 4 via the hanging rod 6, and 7 is the The upper part of the boiler body, 8 is the lower part of the boiler body.

First, as shown in FIG. 1, a first stage steel frame 1 is constructed on the ground, and a ceiling girder 4 is constructed on the ground in parallel with the construction of the first stage steel frame i.

After constructing the first stage steel frame, as shown in Fig. 2, the second stage steel frame 2 is constructed on top of the first stage steel frame 1, and the second stage steel frame 2 is constructed. In parallel with the construction of the frame 2, lift the ceiling girder 4 to the top of the first stage steel frame 1,
Components that can be attached at this stage, such as a hanging rod 6 and pipes (not shown), are suspended and supported from the lower part of the ceiling girder 4.

After constructing the second stage steel frame 2, ceiling girders 4, hanging rods 6, and pipes, as shown in Fig. 3, the @ third stage steel frame is placed on top of the second stage steel frame 2. Along with building 3,
In parallel with the construction of the third stage steel frame 3, the ceiling beams 4, hanging rods 6, and pipes are lifted from the first stage steel frame 1 to the top of the second stage steel frame 2, and then, Ceiling girder 4
Using the hanging rod 6, the header, superheater pipe, reheater pipe, upper furnace wall, hanging structure, ceiling pipe, connecting pipe, ceiling enclosure, etc. (not shown in the figure) can be hung from the bottom of the Build the upper part 7 of the main body of the going boiler.

After constructing the third stage steel frame 3 and the upper part of the boiler body 7,
As shown in Figure 4, the ceiling girder 4 together with the upper part 7 of the boiler body
is lifted from the second stage steel frame 2 to the top of the third stage steel frame 3 and fixed to the top of the third stage steel frame 3, and the boiler furnace and rear heat transfer are connected to the upper part 7 of the boiler main body. The boiler main body 5 is constructed by assembling the lower part 8 of the boiler main body.

In this way, between the start of construction of the first stage steel frame l and the end of construction of the second stage steel frame 2, the ceiling beams 4 and The hanging rods 6 and pipes are constructed at the bottom of the ceiling girder 4 which has been lifted to the top of the second stage steel frame 2 in parallel with the construction of the third stage steel frame 3. Since the boiler main body upper part 7 is constructed using similar materials, the construction period can be shortened.

Furthermore, since the construction of the ceiling girder 4 and the construction of the boiler main body upper part 7 are performed at low places, the work at high places is reduced as a whole, and therefore the danger of the work can be reduced.

Furthermore, work efficiency is improved because there is more work to be done in low places, and in addition to the above, it is possible to further shorten the construction period.

Next, using FIGS. 5 to 10, a concrete explanation will be given of an old note that lifts the ceiling girder 4 relative to the steel frames 1 to 3 of the first to third stages.

In the figure, reference numeral 9 denotes a pillar such as a permanent pillar or a temporary pillar that supports the guide bridge IO that guides the elevation of the ceiling girder 4 in the steel frames 1 to 3 of the first to third stages. As shown in FIG. 8, the frame 10 has a U-shaped horizontal section and extends vertically.
It is detachably fixed to the inner surface of the steel frame l of the pillar 9 with a plurality of clamps 11.

Reference numeral 12 denotes a plurality of pairs of pin holes formed on opposing surfaces of the guide frame 10 having a U-shaped horizontal cross section at regular intervals in the vertical direction.

Reference numeral 13 denotes a jacking device which is housed inside the U-shaped groove of the guide frame 1o and supports the lower end of the ceiling beam 4 via a support plate 25 as shown in FIGS. 6 and 7. It consists of a jack cylinder 14 and clamp mechanisms IS, Is connected to the upper and lower ends of the jack cylinder 14 using pins 15, respectively.

The clamp mechanism 16 is configured as follows.

Reference numeral 17 denotes a pedestal having a Y-shape when viewed from above as shown in FIG. 8, and can be fitted into the guide frame 10 between both side arms and the central arm. The respective pin holes 12 are inserted into both side arms of the mold through pin insertion/removal cylinders 19, respectively.
A pair of pins 20 are provided to be able to be inserted and removed from each other, respectively.
A boss 21 is a boss for guiding and supporting the pin 18 attached to both side arms and a central arm of the Y-shape of the frame i7, and a boss 21 is a boss of the guide bridge lO provided to the central arm of the Y-shape of the frame i7. The support plate 25 is a guide roller that rolls along the inner surface, and the support plate 25 is attached to a boss 20 provided on the central arm of the pedestal 17 in the clamp mechanism 16 on the upper end side of the jack-up device 13.

In addition, 22 in Fig. 10 indicates the third stage steel frame 3 and ceiling girder 4.
A supplementary member 23 provided in the gap is a batten for fixing the supplementary member 22 and the ceiling girder 4 with bolts 24.

First, as mentioned above, when constructing the first stage steel frame l, in parallel with the construction of the first stage steel frame l, the following steps were taken on the ground and inside the first stage steel frame l. Build the ceiling girder 4.

After the first stage steel frame 1 is constructed, among the permanent columns and temporary columns that make up the first stage steel frame 1, as shown in Fig. 5, the pillars 9 located inside the steel frame ↓, On the inside surface of steel frame 1,
As shown in FIG. 8, the guide frame 10, which has a U-shaped horizontal section and extends in the vertical direction, is removably fixed using clamps 11 of different orders, and the ceiling girder 4 is shown in the figure! - While slightly suspended by a crane, the U-shaped guide frame 10 is fitted with the U-shaped guide frame 17, and the Yanokianop device 13 is set. The pins 18 of the attached clamp mechanism 16 are aligned with the second and lowest bottle holes 12 from the bottom of the guide bridge 10, respectively, and the pin inserters 19 are extended to insert the pins 18 into the bottle holes 12. Then, the shine-up device 13 is held on the guide frame 10 as shown in FIG.

Then, the ceiling beam 4 is placed on top of the jack-up device 13 held on the guide bridge 10 via the support plate 25.

In this way, the Tengetsu Dairyo 4 supported on the guide bridge 10 via the seven Yanokianop device 13 is shown in FIG.
Shrink the lot of the pin insertion/removal printer 19 on the upper end side of the Yanokianop device 13 and insert the pin 18 into the bottle hole 1 of the guide frame IO.
2, the clamping state of the guide bridge 10 by the clamp mechanism 16 on the upper end side is released, and then as shown in FIG. Being pushed up high.

When the ceiling beam 4 is pushed up by one pitch, the clamp mechanism (6) on the upper end side of the jack-up device 13 is extended, and the pin 18 is inserted into the pin hole 12 of the guide frame 10. 4 in the pushed up position, and in the same manner as described above, release the clamping state of the clamp mechanism 16 on the lower end side of the Janokin tree to the guide frame 10, contract the loft of the Janokin linter 14, and lift the clamp mechanism 16 on the lower end side. , the clamp mechanism 16 on the lower end side is clamped to the guide frame 10 in the same manner as described above.

Thereafter, by repeating the above operation, the ceiling beam 4 is raised by one pinch of the bottle hole 12, and the ceiling beam 4 is moved from the first stage steel frame 1 to the third stage steel frame. It becomes possible to push up frame 3.

After pushing up the ceiling beam 4 to the top of the third stage steel frame 3, attach the ceiling beam 4 to the additional member 22 attached to the upper end of the column 9 (as shown in Fig. 24, and remove the jacking device 13 from the ceiling beam 4 and the guide frame 0 from the pillar 9, respectively.

The removed jack-up device 13 and guide frame 1O can be used repeatedly when constructing another boiler.

Furthermore, since the ceiling girder 4 is held movably up and down relative to the steel frames 1 to 3 by the gloss amplifier device 13, when assembling the boiler main body upper part 7 to the lower part of the ceiling girder 4, conventionally the third stage steel frame Whereas each component of the boiler body 5 must be moved up and down by a crane (not shown) to position and attach it to the ceiling girder 4 fixed to the frame 3, according to the method of the present invention, The upper part of the boiler main body 7 can also be viewed from the side of the ceiling beam 4, which is held at the top of the steel frame 1.2 of the first and second stages so as to be able to rise and fall freely.
Since positioning and installation can be performed from the side of each component, work efficiency is greatly improved.

Figure 1 shows another embodiment of the present invention, in which instead of constructing the ceiling girder 4 on the ground level in parallel with the construction of the first stage steel frame 1 as shown in Figure 1, the first Only the steel frame 1 of the tier is constructed first, and then, as shown in Fig. 2, in parallel with the construction of the steel frame 2 of the second tier, the ceiling beams 4, hanging rods 6, and pipes are directly attached to the first tier. to be constructed at the top of the steel frame (of
Thereafter, the boiler will be constructed using the same procedure as in the embodiment described above, and even in this manner, the same effects as in the embodiment described above can be obtained.

12 and 13 show other examples of how to lift the ceiling girder 4 relative to the first to third steel frames l to 3. As shown in FIG. The upper end of the ceiling beam 4 is supported by a clamp mechanism 16 on the lower end side via a support plate 25, and the ceiling beam 4 is pulled up from above.

By doing this, it is possible to obtain the same effect as the above-mentioned method, and the stability of the steel frames 1 to 30, which are the scaffolds, is better than when pushing up the ceiling girder 4, so the safety of the work is improved. or improve.

Also, in the unlikely event that a horizontal force such as an earthquake occurs during lifting of the ceiling girder 4, if the push-up method is used, is there a risk that the jack-up device I3 may fall and make it difficult to return to its original state? The pull-up method can eliminate such concerns about the jack-up device 13 falling over.

In this case, as shown in FIG.
3, an extension part 26 extending upward from the third stage steel frame 3
is formed to secure a foothold for the jack-up equipment R13 when pulling up the ceiling girder 4 to the top of the third stage steel frame 3.

FIG. 14 shows still another example of how to lift the ceiling beam 4 relative to the third stage steel frame 3.
Another jack 27 is attached to the top to pull up the ceiling girder 4 from the second stage steel frame 2 to the third stage steel frame 3 at once.

By doing so, it is possible to obtain the same effects as the above-mentioned methods, but it is also possible to further shorten the construction period.

The boiler construction method of the present invention is not limited to the above-described embodiments, and the steel frame may be assembled in three or more stages, and various other changes may be made without departing from the gist of the vehicle invention. Of course, it is also possible to add

[Effects of the Invention] As explained above, according to the boiler construction method of the present invention, various excellent effects as described below can be achieved.

■ Between the start of construction of the first stage steel frame and the completion of construction of the second stage steel frame, the ceiling beams, hanging rods and pipes are constructed in parallel to the first stage steel frame. In addition, in parallel with the construction of the third stage steel frame, the upper part of the boiler body is constructed using hanging rods and pipes at the bottom of the ceiling girder that has been lifted to the top of the second stage steel frame. This makes it possible to shorten the construction period.

■ Since the construction of the ceiling girder and the construction of the upper part of the boiler body are done in low places, the amount of work in high places is reduced as a whole, and therefore, the danger of the work can be reduced.

■ Work efficiency is improved because there is more work to be done in low places, and in addition to the above, it is possible to further shorten the construction period.

[Brief explanation of drawings]

FIG. 1 is a side view showing the first step in a method according to an embodiment of the present invention, FIG. 2 is a side view showing the second step, FIG. 3 is a side view showing the third step, and FIG. The figure is a side view showing the fourth step, FIG. Figure 7 is a view from the ■-■ arrow in Figure 6, Figure 8 is a view from the ■-■ arrow in Figure 7, and Figure 9 is a side view showing the operating state of the jack-up device. 10 is a side view showing the state of the jacking up device when the ceiling girder is lifted up to the top of the third stage steel frame, and FIG. FIG. 12 is a side view showing another example of the use of the jack-up device for carrying out the method of the present invention, and FIG. 13 is a third side view showing the extension part formed on the guide bridge in the case of FIG. 14 is a view similar to FIG. 3 showing still another example of carrying out the method of the present invention, FIG. 15 is a side view showing the first step of the conventional method, and FIG. The figure is a side view showing the second step of the conventional method. In the figure, l is the steel frame of the first stage, 2 is the steel frame of the second stage, and 3
is the third stage steel frame, 4 is the ceiling beam, 5 is the boiler body,
6 indicates a hanging rod, 7 indicates the upper part of the boiler body, and 8 indicates the F section of the boiler body. Patent applicant Ishi J Shimaharima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In a boiler construction method in which a ceiling beam is supported by a steel frame assembled in three or more stages vertically, and the boiler body is suspended and supported from the ceiling beam, the first stage is constructed after the first stage steel frame is constructed. At the same time, the construction of the second stage steel frame is started on top of the second stage steel frame, and the first stage steel frame is Build ceiling girders, hanging rods, and pipes on the steel frame, and after completing the construction of the second stage steel frame, start constructing the third and subsequent steel frames on top of the second stage steel frame. At the same time, while constructing the steel frame for the third and subsequent stages, the ceiling girder was lifted to the height of the second stage steel frame, and the upper part of the boiler body was assembled to the hanging fixtures and pipes at the bottom of the ceiling girder, and the third stage steel frame was constructed. After the construction of the subsequent steel frame is completed, the ceiling girder together with the upper part of the boiler body is lifted up to the upper part of the steel frame from the third stage onwards, and the lower part of the boiler body is assembled to the upper part of the boiler body.