JP6264497B1 - Water pipe wall module and boiler manufacturing method - Google Patents

Abstract

A support rod that functions as a support for a scaffold is firmly attached without affecting the performance of the boiler. A water pipe wall body 2 in which a water pipe wall 3 having a plurality of boiler water pipes 7 extending in one direction and fins 8 connecting adjacent boiler water pipes 7 in one direction is formed into a quadrangular column shape; , One end is welded to one fin 8, the other end is welded to another fin 8, and has a side plate 10 that covers a part of the boiler water pipe 7. Provided is a water pipe wall module having a support base 9 arranged in pairs and a support bar 6 welded to a pair of support bases 9 at both ends. [Selection] Figure 3

Description

  The present invention relates to a water pipe wall module and a boiler manufacturing method.

For example, in an incinerator with a boiler that generates electricity using heat generated when incineration of garbage or the like, a furnace wall of the incinerator is formed by a water pipe wall (boiler panel) having a large number of boiler water pipes.
The boiler water pipe is packed in a transportation frame in a state where the water pipe wall is modularized in a quadrangular prism shape and transported to a work site. The plurality of water pipe wall modules transported to the work site are coupled at the work site (see, for example, Patent Document 1 and Patent Document 2).

  Since it is necessary to assemble a scaffold when connecting a plurality of water tube wall modules at the site, a water tube in which an opening for inserting a support material for the scaffold is formed in advance after bending the boiler water tube A wall module is known (see, for example, Patent Document 3).

Japanese Patent Laid-Open No. Sho 62-266301 JP 2003-222302 A Japanese Utility Model Publication No. 60-32639

  By the way, it is necessary to bend the boiler water pipe or to form a special mechanism for removing the refractory material of the opening when passing the support material in order to attach the support material using the opening. Go up. In addition, since the refractory material of the opening cannot be formed thick, there is a risk of adversely affecting boiler performance.

  An object of the present invention is to provide a water tube wall module and a boiler manufacturing method capable of firmly attaching a support rod functioning as a support material for a scaffold without affecting the performance of the boiler.

  According to the first aspect of the present invention, the water pipe wall module includes a water pipe wall having a plurality of boiler water pipes extending in one direction and fins connecting the adjacent boiler water pipes in the one direction. A water pipe wall body assembled in a quadrangular column shape, and a side plate that covers one part of the boiler water pipe with one end welded to one fin and the other end welded to the other fin. And a support base arranged in pairs with the water pipe walls facing each other, and a support bar welded to the pair of support bases at both ends.

According to such a structure, a water pipe wall main body can be reinforced with the support rod fixed via the support stand, and it can be set as the water pipe wall module strong against the vibration at the time of transport.
In addition, since the side plate of the support base is welded to the fins instead of the boiler water pipe, the support base and the support rod can be attached without affecting the performance of the boiler water pipe.
In addition, since the side plate of the support base is welded at two points on both ends, not only the support base can be firmly attached, but also the heat at the time of welding to the fins can be dispersed. The effect is reduced and consequently the performance of the boiler water pipe is not affected.
In addition, the support rod can be used as a scaffold support when assembling the water pipe wall on site. That is, it is possible to facilitate the work of assembling a scaffold at the site.
Also, when operating the boiler, the support rod is removed while leaving the side plate on the water tube wall body side, but when inspecting or repairing the boiler water tube, the support rod is re-used using the side plate of the support base. Can be welded.

  In the water pipe wall module, the support base is connected to the side plate, a flat base plate disposed so that a main surface is orthogonal to the axis of the boiler water pipe, one surface of the base plate, and the side plate The support bar may be welded to the other surface, which is the surface opposite to the one surface of the base plate, or to the side plate.

According to such a structure, when assembling a water pipe wall on-site, a support bar can be firmly supported from below by a base plate and a rib.
In addition, the length of the support bar only needs to reach the base plate of the pair of support bases arranged on the opposite water pipe walls, and does not necessarily need to be the length between the side plates of the pair of support bases. Thus, the length of the usable support material can be given a width.

  In the water tube wall module, the support rod has a circular cross-sectional shape, and a pair of auxiliary plates sandwiched between the lower surface of the support rod and the other surface of the base plate is provided on the other surface of the base plate. The support rod may be welded to the pair of auxiliary plates.

  According to such a configuration, even when the cross-sectional shape of the support bar is circular, the support bar can be stably supported.

  According to the second aspect of the present invention, the boiler manufacturing method is a boiler manufacturing method using any one of the above water pipe wall modules, wherein the water pipe wall module is mounted in a state in which the support bar is along the vertical direction. A transport step for transporting, and an assembly step for assembling a plurality of the water pipe wall modules after the transport step, wherein the support rod is used as a support material for the scaffold in the assembly step. To do.

  According to such a configuration, during transportation, the support rod welded at the factory, that is, the support rod welded at the factory, functions as a reinforcing member for the water pipe wall module, and when the boiler is assembled at the site, the support rod is supported. A rod can be used as a scaffold support. That is, the support bar can be used both as a reinforcing member during transportation and as a scaffold support during assembly of the boiler.

  In the boiler manufacturing method, after the assembling process, the cutting process of separating the support bars from the pair of support bases while leaving the side plate, and after the cutting process, the inspection of the boiler water pipe or In the repair, a re-welding step of welding both ends of the support rod to the two support bases may be further included.

  According to such a configuration, when the support bar is separated, the side plate of the support base is left, so that the support base can be reused when the boiler water pipe is inspected or repaired. Thereby, since a support bar can be installed without welding directly to a boiler water pipe or a fin on the spot, the performance of a boiler water pipe is not affected.

According to the present invention, the water pipe wall body can be reinforced by the support rod fixed via the support base, and the water pipe wall module is resistant to vibration during transportation without affecting the performance of the boiler. be able to.
Also, the support rod can be used immediately as a scaffold support when assembling the water tube wall on site. That is, it is possible to facilitate the work of assembling a scaffold at the site.

It is a perspective view of the water pipe wall module of the embodiment of the present invention. It is sectional drawing seen from the extension direction of the support rod of the water pipe wall module of embodiment of this invention. It is a top view of the support stand and support bar of an embodiment of the present invention. It is IV-IV sectional drawing of FIG. 3, and is a front view of the support stand of embodiment of this invention. It is a side view of the support stand of embodiment of this invention.

Hereinafter, a water pipe wall module according to an embodiment of the present invention and a boiler manufacturing method using the water pipe wall module will be described in detail with reference to the drawings.
The water pipe wall module of the present embodiment is obtained by modularizing a water pipe wall used for a boiler constituting a stoker-type incinerator, for example. A boiler is manufactured by combining a plurality of water pipe wall modules.

As shown in FIG. 1, the water pipe wall module 1 of the present embodiment includes a water pipe wall module body 2 in which the water pipe walls 3 are assembled in a square column shape, and a plurality of transports that reinforce the water pipe wall module body 2 from the outside. A frame 4, a support base 9 (see FIGS. 3, 4, and 5) disposed in pairs with the water pipe wall 3 facing each other, and a water pipe wall module body 2 fixed to the support base 9 And a plurality of support rods 6 that reinforce the inner side. Among these, at least the support rod 6 is removed during the operation of the boiler after the completion of the boiler.
As shown in FIG. 2, the support bar 6 is a member having a circular cross-sectional shape that supports the plate-like scaffold 18 when assembling the water pipe wall module 1 in the field from below. As will be described later, the support bar 6 is also a member used as a reinforcing member for preventing deformation of the water pipe wall module when the water pipe wall module 1 is transported. Combines the functions and functions of the scaffolding support during boiler assembly. The water pipe wall module 1 of the present embodiment has a four-stage scaffold 18. Each scaffold 18 is supported by two support rods 6.

  As shown in FIGS. 3, 4, and 5, each water pipe wall 3 includes a plurality of boiler water pipes 7 extending in one direction and fins 8 connecting adjacent boiler water pipes 7 in one direction. have. Hereinafter, the axis A of the boiler water pipe 7 is simply referred to as the axis A.

Each of the plurality of boiler water pipes 7 is cylindrical. The plurality of boiler water pipes 7 have the same diameter and are arranged at the same interval.
The fin 8 has a flat plate shape. The fins 8 are arranged on the same plane as the plane including the axis A of the plurality of boiler water pipes 7.

  As shown in FIG. 1, the transport frame 4 has four steel sections 5 connected to form a quadrangular shape. Each die steel part 5 extends in the arrangement direction of the boiler water pipes 7. The transport frame 4 is formed such that each die steel part 5 is in contact with a boiler water pipe 7 constituting the water pipe wall 3. The transport frame 4 prevents the water tube wall module body 2 having a rectangular shape when viewed from the axial direction Da of the boiler water tube 7 from being deformed into a parallelogram shape.

  Each support bar 6 is fixedly supported by a pair of support bases 9 fixed to the water pipe wall 3. When the water tube wall module 1 is installed so that the axis A is along the vertical direction (when assembling the water tube wall module 1 in the field), the pair of support bases 9 are arranged so that the support bar 6 is horizontal. The both ends of the support bar 6 are supported from below.

The support base 9 includes a side plate 10 joined to the fin 8 by welding, a base plate 14 connected to the side plate 10, and a rib 15 connected to the base plate 14 and the side plate 10. Yes. The support bar 6 is connected to the base plate 14.
The side plate 10 includes a plate-like first part 11 welded to one fin 8, a plate-like second part 12 welded to another fin 8 adjacent to the one fin 8, and a first part. 11 and a plate-like third portion 13 for connecting the second portion 12 to each other.

The first part 11 and the second part 12 are welded to the fin 8 so as to be orthogonal to the fin 8. The third part 13 connects the first part 11 and the second part 12 so as to be parallel to the fins 8. The side plate 10 has a U-shaped cross section. In the side plate 10, a first part 11 that is one end is welded to one fin 8, and a second part 12 that is the other end is welded to another fin 8.
A gap is formed between the side plate 10 and the boiler water pipe 7. That is, the side plate 10 and the boiler water pipe 7 are not in contact with each other, and the side plate 10 is disposed so as to cover a part of the boiler water pipe 7. Since the side plate 10 and the boiler water pipe 7 are not in contact with each other, the welding heat can be prevented from affecting the boiler water pipe 7 when the side plate 10 is welded to the fin 8. Further, since the support base 9 and the support rod 6 including the side plate 10 are welded not in the field but in the factory, the water pipe wall that has passed the factory shipment inspection, that is, the performance of the boiler water pipe 7 at this point is not a problem. Only module 1 will be transported to the site. Furthermore, in the water tube wall module 1 of this embodiment, since it is not necessary to form the opening part for attaching the support material for scaffolds disclosed by patent document 3, in order to form the said opening part, a boiler water pipe Since there is no need to bend and a special mechanism for removing the refractory material in the opening is unnecessary, the refractory material is not formed thinly around the special mechanism. In addition, as will be described later, when maintenance work such as inspection and repair of the boiler is performed after completion of the boiler, the support rod 6 is welded again to the support base 9 on site, but a part of the boiler water pipe 7 is covered. Since the side plates 10 welded to the fins on both sides of the boiler water pipe 7 can dissipate heat when the support rod 6 is re-welded, the thermal influence on the boiler water pipe can be reduced.
That is, in the water pipe wall module 1 of the present embodiment, the support rod 6 that is used as a reinforcing member during transportation and a scaffold support during assembly of the boiler is welded without affecting the performance of the boiler. It will be attached by.

  The base plate 14 is connected to the third portion 13 of the side plate 10 by welding. The base plate 14 is disposed so that the main surface of the base plate 14 is orthogonal to the axis A. In other words, the base plate 14 is attached so that the main surface faces the vertical direction when assembling the water pipe wall module 1 at the site.

  The rib 15 is a plate-like member that connects the third surface 13 of the side plate 10 to the surface 14 a of the base plate 14 opposite to the surface to which the support bar 6 is connected. The rib 15 is disposed so that the main surface of the rib 15 is orthogonal to the base plate 14 and the third portion 13. In other words, the rib 15 connects the lower surface (one surface 14a) of the base plate 14 and the third portion 13 when the water tube wall module 1 is installed so that the axis A is along the vertical direction. The plate 14 is firmly supported from below.

A pair of auxiliary plates 16 are welded to the other surface 14 b of the base plate 14. The auxiliary plate 16 is sandwiched between the lower surface of the support bar 6 and the other surface 14 b of the base plate 14. The outer peripheral surface of the support bar 6 is supported by the other surface 14 b of the base plate 14 and a pair of auxiliary plates 16. The support bar 6 is welded to the pair of auxiliary plates 16.
The support rod 6 having a circular cross-sectional shape can be easily welded to the base plate 14 by the pair of auxiliary plates 16. In addition, when the cross-sectional shape of the support bar 6 is a quadrangle, that is, when the support bar 6 is a prism, it is not necessary to provide the auxiliary plate 16.

  As shown in FIG. 2, each scaffold 18 is brought close to either side in the horizontal direction H perpendicular to the extending direction of the support bar 6 so that a passing portion 19 for passing an operator is provided. ing.

  Specifically, the scaffold 18 is disposed so that the passing portions 19 adjacent in the vertical direction do not overlap each other when viewed from the axial direction Da. Specifically, the passage part 19 provided by one scaffold 18 is provided on one side in the horizontal direction H, and the passage part 19 provided by another scaffold 18 adjacent to the one scaffold 18 in the vertical direction is horizontal. Provided on the other side in the direction H. That is, the passing portions 19 are provided so as to alternate in the vertical direction. Thereby, the worker can use the passage part 19 when climbing the scaffold 18 on the upper level.

  Correspondingly, the two support rods 6 that support one scaffold 18 are moved toward the side opposite to the side where the passage portion 19 is provided in the horizontal direction H. That is, the two support rods 6 are disposed at positions that support the scaffold 18 disposed so as to secure the passage portion 19 on either side of the horizontal direction H in a well-balanced manner.

Next, the manufacturing method of the boiler using the water pipe wall module 1 of this embodiment is demonstrated.
In addition, description is abbreviate | omitted about the same effect as the water pipe wall module of the said embodiment.
The boiler manufacturing method includes a transporting process for transporting the water pipe wall module 1 to the site, an assembling process for assembling the water pipe wall module 1 at the site after the transporting process, and a cutting process for separating the support rod 6 after the assembling process. And a re-welding step of welding the support bar 6 to the support base 9 at the time of inspection or repair of the boiler water pipe 7 after the cutting step.

  In the transporting process, the water pipe wall module 1 manufactured in the factory is transported with the axis A along the horizontal direction H and the support bar 6 along the vertical direction. As a result, the water pipe wall 3 disposed above is supported by the support rod 6. In other words, the support rod 6 can function as a reinforcing member for the water tube wall module 1 during transportation.

  In the assembly process, after the water pipe wall module is stood up so that the axis A is in the vertical direction, a plurality of water pipe wall modules 1 are assembled. In the assembly process, the support bar 6 is used as a support material for the scaffold 18. That is, it is not necessary to newly attach a support material to the water pipe wall module body 2 at the site.

In the cutting step, the support bar 6 is separated from the support base 9 while leaving the side plate 10 left. Further, when the support bar 6 is separated from the support base 9, the base plate 14 and the rib 15 of the support base 9 may be separated from the side plate 10. By removing the support rod 6 and removing the base plate 14 and the rib 15, the flow of exhaust gas is smoothed during the operation of the boiler, and the fly ash is prevented from adhering to and accumulating on the base plate and the rib. Can do.
Further, by leaving the side plate 10 when the support bar 6 is separated, the side plate 10 can be reused and the support bar 6 can be welded again when the boiler water pipe 7 is inspected or repaired. Since the side plate 10 is left, the efficiency of heat exchange of the boiler water pipe 7 in which the side plate 10 remains is reduced, but the total area of the place where the support base 9 is arranged is negligible when viewed as the whole boiler. Therefore, it can be said that it does not affect the boiler performance after completion.

  In the re-welding process, both ends of the support bar 6 are welded to the pair of support bases 9. Specifically, when the boiler water pipe 7 is inspected or repaired, the base plate 14 and the rib 15 are welded to the remaining side plate 10, and then the support bar 6 is welded to the base plate 14. If the length of the support bar 6 is the same as the distance between the side plates 10 of the pair of support bases 9, the base plate 14 and the ribs 15 need not be welded, and the support bar 6 may be directly welded to the side plates 10. . Further, only one of the pair of support bases 9 is welded to the base plate 14 and one end of the support bar is welded to the base plate 14. The other support base 9 does not weld the base plate 14 and the side plate 10 The other end may be welded. Thereby, since the support rod 6 of various length can be used, installation cost can be reduced.

According to the said embodiment, the water pipe wall module main body 2 can be reinforced with the support rod 6 fixed via the support stand 9, and it can be set as the water pipe wall module 1 strong against the vibration at the time of transport.
Further, since the side plate 10 of the support base 9 is welded to the fins 8 in advance at the factory and left in the cutting process, the welding heat is applied to the boiler water pipe 7 when the support bar 6 is welded to the support base 9 and reattached. There is no influence.

  When the boiler is operated, the support bar 6 is removed while the side plate 10 of the support base 9 is left on the water pipe wall module body 2 side. However, when the boiler water pipe 7 is inspected or repaired, the removed support bar 6 is removed. Can be re-welded to the support base 9 on site. At this time, the length of the support bar 6 is shorter than the length before the removal, but re-welding is possible by using the support base 9 in which the base plate 14 and the like are welded to the remaining side plate 10. Since the removed support bar 6 can be reused, maintenance costs can be reduced. Further, since the remaining side plate 10 covers a part of the boiler water pipe 7 and is welded to the fins on both sides of the boiler water pipe 7, the welding heat is generated when the support rod 6 is re-welded to the support base 9 at the site. Is not dispersed and the boiler water pipe 7 is not affected by heat. Therefore, regardless of the skill level of the worker, the worker can easily perform the welding work without affecting the performance of the boiler.

  Further, since the side plate 10 of the support base 9 is welded not at the site but at the factory, it can be accurately welded to the fins 8 of the water pipe wall 3. That is, the side plate 10 can be welded without affecting the performance of the boiler water pipe 7.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention. .
In the above embodiment, the support rod 6 is mounted on the base plate 14 and welded to the pair of auxiliary plates 16. However, the present invention is not limited to this, and the base plate is not provided without providing the pair of auxiliary plates 16. It may be welded directly to the plate 14. Moreover, you may weld directly to the 3rd part 13 of the side plate 10, without providing the base plate 14 and the rib 15. FIG.

Moreover, in the said embodiment, although the side plate 10 was made into U shape, it does not restrict to this. That is, the side plate 10 may have a shape in which one end is welded to one fin 8 and the other end is welded to another fin 8 and covers a part of the boiler water pipe 7. For example, it may be U-shaped.
In addition, the side plate 10 is configured to be welded to one fin 8 and the fin 8 adjacent to the one fin 8, but the side plate 10 is composed of two adjacent ones of the one fin 8 and the one fin 8, Alternatively, two or more adjacent fins 8 may be welded.

Further, in the boiler manufacturing method, the support rod 6 is separated from the support base 9. However, the present invention is not limited to this. If there is no effect on the boiler performance, the boiler is operated with the support rod 6 remaining. Also good.
Further, the cross-sectional shape of the support bar 6 is not limited to a circle or a rectangle, but may be a polygon. Further, as the support bar 6, a square pipe having a hollow inside may be adopted.

DESCRIPTION OF SYMBOLS 1 Water pipe wall module 2 Water pipe wall module main body 3 Water pipe wall 4 Transport frame 5 Type steel part 6 Support rod 7 Boiler water pipe 8 Fin 9 Support stand 10 Side plate 11 First part 12 Second part 13 Third part 14 Base plate 15 Rib 16 Auxiliary plate 18 Scaffold 19 Passing part A Axis Da Axis direction H Horizontal direction

Claims (5)

A water pipe wall body in which a plurality of boiler water pipes extending in one direction and a water pipe wall having fins connecting adjacent boiler water pipes across the one direction are formed in a quadrangular prism shape;
One end is welded to one of the fins, the other end is welded to the other fin, and has a side plate that covers a part of the boiler water pipe, and is opposed to the water pipe walls facing each other. A support base arranged to be
And a support rod welded to the pair of support bases at both ends. The support base is
A plate-like base plate connected to the side plate and disposed so that the main surface is orthogonal to the axis of the boiler water pipe;
A rib connected to one side of the base plate and the side plate;
2. The water pipe wall module according to claim 1, wherein the support bar is welded to the other surface which is a surface opposite to one surface of the base plate or the side plate. The support bar has a circular cross-sectional shape,
The other surface of the base plate is provided with a pair of auxiliary plates sandwiched between the lower surface of the support bar and the other surface of the base plate,
The water pipe wall module according to claim 2, wherein the support bar is welded to the pair of auxiliary plates. A boiler manufacturing method using the water pipe wall module according to any one of claims 1 to 3,
A transporting step of transporting the water pipe wall module in a state where the support bar is along the vertical direction;
An assembly step of assembling a plurality of the water pipe wall modules after the transporting step,
In the assembling process, the support rod is used as a scaffold support material. After the assembly step, the cutting step of separating the support bar from the pair of support bases while leaving the side plate left,
5. The method according to claim 4, further comprising a re-welding step of welding both ends of the support rod to the two support bases after the cutting step and inspecting or repairing the boiler water pipe. The manufacturing method of the boiler as described in 1 ..

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