JPH0573962B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a boiler modularized in a factory for barge transportation, and a superheater of the boiler,
This relates to a support device that prevents the reheater and economizer from rolling.

Conventional technology Small and medium-sized boilers delivered to regions with extremely poor local working conditions, such as the Middle East and Africa, are modularized, meaning the entire boiler is assembled and completed in a factory, and then transported to the site by barge. The method of transportation and installation is advantageous in terms of quality, construction period, construction cost, etc.

However, as the boiler becomes larger, it may not necessarily be advantageous to make it into an integrated module in terms of strength, safety, or economy during barge transportation.In such cases, an alternative construction method is A two-part boiler modular construction method is sometimes adopted.

An outline of this two-part modular construction method for a boiler will be explained below. Figure 7 shows the outline of the boiler after it has been assembled using the two-part modular construction method.
In this construction method, as shown in Figures 8a and 8b, the entire boiler is cut vertically into two halves at the positions indicated by reference numeral A in Figure 7, and each is assembled in a factory as separate modules 1 and 2. It is something that is completed.

The upper and lower modules 1 and 2 assembled and completed at the factory are transported to the site on a barge 3, as shown in Fig. 9, where they are assembled together.
It is completed as shown in Figure 7.

As shown in Figures 10a to 10c, the on-site assembly is carried out by first assembling a temporary gate-shaped frame 4 (Figure 10a), lifting the upper module 1 by this gate-shaped frame 4, and then attaching the lower module thereto. Load module 2 (Fig. 10b), and then install upper and lower modules 1 and 2.
are assembled together (Fig. 10c).

However, during barge transportation of boiler modules, a lateral load of up to 0.6G is generated due to the ship's rocking, so one of the most important points to consider when designing the two-part modular construction method for large boilers is the The problem lies in how to support the superheater tubes, reheater tubes, and economizer tubes, which are the heaviest among them, against the shaking of the ship during barge transportation and ensure safety.

Problems to be Solved by the Invention Therefore, the present invention has been made in order to solve the problems in the prior art. The purpose of the present invention is to provide an inexpensive and safe support device for superheater tubes, reheater tubes, and economizer tubes against ship shaking during barge transportation.

Means for Solving the Problems In order to achieve this object, the support device for superheater tubes, etc. of the present invention provides support for superheaters, reheaters, and Support beams penetrating the left and right furnace walls of the boiler are installed above and below the coal burner panel, and the suspension pipes or supporting hardware of the superheater, reheater, and economizer are fixed to the support beams, and the support beams are The present invention is characterized in that a vertical beam is provided between the upper and lower main backstays in the portion that penetrates the furnace wall, and the vertical beam and the support beam are connected.

Operation According to the above means, the lateral load on the superheater tubes, etc. due to the shaking of the barge is transmitted to the main backstay via the hanging tubes, support beams, and vertical beams, so the lateral load can be completely reliably transferred to the boiler. It can be transmitted to the supporting steel frame.

EXAMPLES The details of the invention will now be described with reference to illustrative examples. Note that the same reference numerals are used for components common to those of the prior art described above.

FIG. 1 shows an example of a completed factory drawing of a boiler upper module to which the present invention is applied. In the figure, reference numeral 5 denotes a boiler supporting steel frame, which is strongly reinforced to withstand vertical and lateral loads caused by the shaking of the ship while the boiler module is being transported by barge. The vertical load of the boiler is supported by the boiler supporting steel frame 5 by a hanging rod 6. On the other hand, the lateral load of the boiler is first transmitted to the main backstay 7, which is supported by the boiler support steel frame 5 by connecting the main backstay 7 and the boiler support steel frame 5 with a stopper 8.

The lateral loads of the superheater tube 9, reheater tube 10, and economizer tube 11, which are the heaviest among the boiler components of the present invention, are transmitted to the main backstay 7 in the following manner.

Here, as a representative example, the method of supporting the reheater tube 10 shown in FIG. 1 will be explained in detail.
(The support method of other parts is also similar to that of the reheater tube.) Details of the support structure of the reheater tube 10 are shown in FIGS. 2 to 6. In Figs. 2 to 4 and 6, reference numeral 13 denotes a hanging tube, and the reheater tube 10 is fixed to the hanging tube 13 by welding via a spacer 14. Reference numeral 15 denotes a support beam, which is connected to the hanging pipes 13 above and below the panel of the reheater pipe 10.
5, and both ends thereof penetrate the furnace wall 16 as shown in FIG.

The support beam 15 and the hanging pipe 13 are connected to the support hardware 17.
The lateral load of the reheater tube 10 due to the rocking of the ship is transmitted to the support beam 15 via the suspension tube 13. Note that 12 is a tube protection rubber interposed at the joint between the hanging tube 13 and the support beam 15.

As shown in FIG. 5, the support beam 15 penetrating the furnace wall 16 is fixed by bolts 19 to a vertical beam 18 provided between the upper and lower main backstays 7 located outside the furnace 16a. The applied lateral load is transmitted to the vertical beam 18.

The vertical beam 18 is fixed to the upper and lower main backstays 7 by welding, and is connected to the reheater tube 10.
The lateral load is transmitted to the main backstay 7.

As described above, the lateral load on the reheater tube 10 due to the ship's rocking is transmitted to the main backstay 7 via the suspension tube 13, the support beam 15, and the vertical beam 18.
The lateral load transmitted to the main backstay 7 is finally transmitted to the boiler support steel frame 5 by the stopper 8 (FIG. 1).

Effects of the Invention In a normal boiler, the superheater tube 9, the reheater tube 10, and the economizer tube 11 are suspended by the hanging tube 13, and the boiler can be operated with the same structure. When modularized and transported by barge, a large lateral load is generated due to the rocking of the barge 3, and the superheater tube 9, reheater tube 10, and economizer tube 11 collide with the furnace wall 16, causing damage to the tubes. However, by adopting the support device according to the present invention for the superheater tube 9, reheater tube 10, and economizer tube 11 of the modularized boiler, the superheater tube 9, reheating It becomes possible to safely and reliably transmit the lateral loads of the vessel tube 10 and the economizer tube 11 to the boiler supporting steel frame 5, and the modularization of the boiler can be facilitated.

[Brief explanation of the drawing]

Figure 1 is an assembly diagram of the upper module in which the support device for superheater tubes etc. according to the present invention is installed, and Figure 2 is the
an enlarged view showing the support device in detail in the part shown;
3 is an enlarged vertical sectional view of the part shown in FIG. 2, FIG. 4 is an enlarged plan view of the same part, FIG. Figure 7 is an enlarged view of the part shown in the figure. Figure 7 is a front view of the hanging boiler completed by assembling the two-part boiler module.
Figure a is a schematic front view of an upper module obtained by cutting the entire suspended boiler above into two halves, Figure 8b is a schematic front view of a lower module obtained in the same manner, and Figure 9 is a schematic front view of the upper module and the lower module obtained in the same manner. Figure 10a is a drawing of the temporary gate frame assembly and upper module loading from the two-part boiler module assembly procedure; Figure 10b is a diagram of lifting the upper module and lower module loading from the same assembly procedure. Figure 10c is a diagram showing the welding of the upper and lower modules and the removal of the temporary gate-shaped frame from the same assembly procedure. 1... Upper module, 2... Lower module, 5... Boiler support steel frame, 7... Main backstay, 9... Superheater tube, 10... Reheater tube, 11...
... Economizer, 13 ... Suspension pipe, 15 ... Support beam, 1
6... Furnace wall, 17... Support hardware, 18... Vertical beam.

Claims (1)

[Claims] 1. In a boiler modularized at a factory for barge transportation, support beams are provided above and below the superheater, reheater, and economizer panels that penetrate the left and right furnace walls of the boiler, and the support beams are used to connect the superheater tubes. , fixing the hanging pipes or supporting hardware of the reheater pipe and the economizer pipe, and providing a vertical beam between the upper and lower main backstays connected to the boiler support steel frame in the part where the support beam penetrates the furnace wall; A support device for a superheater tube or the like configured by connecting the vertical beam and the support beam.