JP2024001636A - Stoker support structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide stoker support structure which adapts to a three-dimensional complicated load field and furthermore can be reduced in the weight of the structure.

SOLUTION: Stoker support structure is provided, supporting on a plurality of pedestals, a stoker having: a stoker main body having a fire grate combusting a combustion object while horizontally transporting it; and a drive portion which extends in a transportation direction of the combustion-object, and connected at one end of the drive portion to the fire grate, the stoker support structure comprises: a first frame extending in a horizontal direction, and supporting the stoker main body; a columnar support extending upward from a lower end arranged on the pedestal, and supporting the first frame; a second frame connected to the first frame in the transportation direction, and having a reaction force receiving portion supporting the other ends of a plurality of drive portions which are arranged in parallel in a width direction intersecting with the transportation direction; and a plurality of width-direction oblique materials extending while being inclined in such a manner that intervals between the oblique materials expand in a width direction as progressing upward from the lower end which is arranged on the pedestal.

SELECTED DRAWING: Figure 2

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present disclosure relates to stoker support structures.

Patent Document 1 discloses a support structure for a large structure used in a plant or the like. This support structure includes support beams that extend in the horizontal direction and are arranged in a grid pattern, and column bases that support the support beams. A plurality of support beams are arranged in layers in the vertical direction. A large structure is placed on each support beam.

International Publication No. 2019/038919

However, the support structure described in Patent Document 1 is not designed to handle a three-dimensional complex load field. For example, when the large structure to be supported is a stoker, the stoker includes a drive unit for transporting the material to be incinerated. The drive unit receives reaction force when conveying the material to be incinerated. This reaction force is transmitted to the support structure below. The support structure of Patent Document 1 takes only the own weight into consideration, and is not optimized for the reaction force transmitted from the drive unit. Therefore, in the support structure described above, a large number of members are used which are more complicated than necessary, and the weight of the support structure as a whole has been increased.

The present disclosure has been made in order to solve the above problems, and an object of the present disclosure is to provide a stoker support structure that can realize weight reduction while responding to a three-dimensional complex load field.

In order to solve the above problems, a stoker support structure according to the present disclosure includes a stoker main body having a grate that incinerates the material to be incinerated while conveying it in a horizontal direction, and a stoker main body that extends in the conveying direction of the material to be incinerated and has one end connected to the A stoker support structure that supports a stoker on a plurality of pedestals, the drive unit being connected to a grate, the first frame extending in the horizontal direction and supporting the stoker main body; a support column extending upward from a lower end to support the first frame; and a plurality of drive units connected to the first frame in the conveyance direction and arranged in parallel in a width direction intersecting the conveyance direction. a second frame having a reaction force receiving part that supports the other end; A plurality of widthwise diagonal members connected to the reaction force receiving part.

According to the stoker support structure of the present disclosure, weight reduction can be achieved while coping with a three-dimensional complex load field.

FIG. 1 is a schematic configuration diagram of a stalker according to a first embodiment of the present disclosure. FIG. 2 is a diagram of the stoker support structure according to the first embodiment of the present disclosure viewed from the width direction. FIG. 1 is a perspective view of a stoker support structure according to a first embodiment of the present disclosure. FIG. 3 is an enlarged perspective view of the second frame according to the first embodiment of the present disclosure. FIG. 2 is a diagram of the width direction diagonal member according to the first embodiment of the present disclosure, viewed from the upstream side in the conveyance direction. FIG. 7 is a diagram of a width direction diagonal member according to a second embodiment of the present disclosure, viewed from the upstream side in the conveyance direction.

<First embodiment>
(stoker furnace)
Hereinafter, a stoker furnace 1 including a stoker support structure 5 according to a first embodiment of the present disclosure will be described with reference to FIGS. 1 to 5.
The stoker furnace 1 according to the present embodiment incinerates garbage and the like as a material to be incinerated B.

As shown in FIG. 1, the stoker furnace 1 includes a furnace body 2, a hopper 3, a feeder 4, a stoker 10, a stoker support structure 5, a pedestal 6, a wind box 7, and a discharge chute 9. Be prepared.

(furnace body)
A processing space V for burning the material to be incinerated B is formed inside the furnace body 2 . Furthermore, a passage is formed in the upper part of the furnace body 2 to exhaust exhaust gas generated by combustion of the material to be incinerated B from the processing space V. The processing space V is supplied with primary air for combustion from a wind box 7, which will be described in detail, and secondary air for combustion is supplied from a passage in the upper part of the furnace body 2. Further, the processing space V is provided with a stoker 10, which will be described in detail later. In the processing space V, the material to be incinerated B is conveyed horizontally by the stoker 10 while being burned.

Below, in the horizontal direction, the direction in which the materials to be incinerated B are transported is simply referred to as the "transportation direction D", the upstream side Du of the transport direction D is simply referred to as the "upstream side Du", and the downstream side Dd of the transport direction D may be simply referred to as "downstream side Dd" for explanation. Further, in the horizontal direction, the width direction W of the stoker 10 that intersects with the conveyance direction D may be simply referred to as the "width direction W" (see FIG. 3). In this embodiment, the width direction W is orthogonal to the conveyance direction D.

On the upstream side Du of the furnace body 2, a hopper 3 and a feeder 4 for supplying the material to be incinerated B to the processing space V are provided.

(hopper)
The hopper 3 temporarily stores the material to be incinerated B. The hopper 3 is formed into a cylindrical shape that opens in the vertical direction. The material to be incinerated B is supplied from the upper opening of the hopper 3 .

(feeder)
The feeder 4 is provided at a lower opening of the hopper 3. The feeder 4 connects the hopper 3 and the furnace body 2. The feeder 4 pushes out the material to be incinerated B stored in the hopper 3 into the furnace body 2 by a stroke movement in the transport direction D.

(stalker)
The stoker 10 is provided within the furnace body 2. The stoker 10 includes, in order from the upstream side Du in the transport direction D, a drying stage 11 that dries the material to be incinerated B, a combustion stage 12 that combusts the material to be incinerated B, and completely incinerates the unburned material (post-incineration). and a post-combustion stage 13. The drying stage 11 is arranged above the combustion stage 12 and the post-combustion stage 13. The stoker 10 includes a stoker main body 14 and a drive section 15 for each of the drying stage 11, combustion stage 12, and post-combustion stage 13.

(stalker body)
The stoker body 14 has a grate 16 . The grate 16 incinerates the material to be incinerated B while conveying it in the conveying direction D. In the drying stage 11, the stoker main body 14 is arranged so as to be inclined downward toward the downstream side Dd. In the combustion stage 12 and the post-combustion stage 13, the stoker main body 14 is arranged so as to be inclined upward toward the downstream side Dd. In this embodiment, the stoker body 14 of the combustion stage 12 and the stoker body 14 of the post-combustion stage 13 are integrated.

(Drive part)
The drive unit 15 is arranged on the upstream side Du of each stoker main body 14. A plurality of drive units 15 are arranged in parallel at equal intervals in the width direction W. Each drive section 15 extends in the transport direction D of the material to be incinerated B. One end of the drive unit 15 on the downstream side Dd in the transport direction D is connected to the grate 16 . The drive unit 15 operates the grate 16 to transport the material to be incinerated B from the upstream side Du to the downstream side Dd.

The drive unit 15 is, for example, a hydraulic actuator. As shown in FIG. 2, the drive section 15 includes a drive main body 17 and a drive base 18.

The drive main body 17 is formed into a rod shape extending in the transport direction D. In the drying stage 11, the drive body 17 is slightly inclined downward toward the downstream side Dd. In the combustion stage 12 and the post-combustion stage 13, the drive body 17 is arranged so as to be inclined upward toward the downstream side Dd.

The drive base 18 is provided at the upstream Du end of the drive main body 17. The drive base 18 receives a reaction force from the grate 16 when the drive unit 15 is driven.

(Stoker support structure)
As shown in FIG. 1, the stoker support structure 5 is provided within the furnace body 2. The stoker support structure 5 is arranged below the stoker 10. The stoker support structure 5 is provided to support the stoker 10. Details of the stoker support structure 5 will be described later.

(pedestal)
The pedestal 6 is provided, for example, on a part of the steel frame of the plant. The pedestal 6 is arranged below the stoker 10. As shown in FIG. 3, a plurality of pedestals 6 are arranged at equal intervals in the width direction W. The distance between the pedestals 6 in the width direction W is larger than the distance between the drive units 15 in the width direction W. In this embodiment, the pedestal 6 is provided so that the width direction W position does not overlap with the drive part 15. The plurality of pedestals 6 lined up in the width direction W form a pedestal row 60 extending in the width direction W. In this embodiment, four pedestal rows 60 are provided in line in the conveyance direction D. Below, the pedestal rows 60 will be referred to as a first pedestal row 61, a second pedestal row 62, a third pedestal row 63, and a fourth pedestal row 64 in order from the upstream side Du in the conveyance direction D.

The first pedestal row 61 is provided on the upstream side Du of the drying stage 11. The first pedestal row 61 is arranged so as to overlap the combustion stage 12 and the post-combustion stage 13 in the vertical direction. The second pedestal row 62 is provided directly below the downstream Dd end of the drying stage 11. The second pedestal row 62 is provided on the upstream side Du of the combustion stage 12 and the post-combustion stage 13. The third pedestal row 63 is provided directly below the combustion stage 12. The fourth pedestal row 64 is provided directly below the downstream Dd end of the after-combustion stage 13. The second pedestal row 62, the third pedestal row 63, and the fourth pedestal row 64 are arranged below the first pedestal row 61 at the same vertical position.

(Wind box)
As shown in FIG. 1, the wind box 7 is arranged below the stoker 10. A primary air line 70 is connected to the wind box 7. Primary air for combustion is fed under pressure to the wind box 7 from the outside through a primary air line 70. The wind box 7 supplies primary air for combustion toward the processing space V from below the stoker 10. This primary air is supplied to the material to be incinerated B on the stoker 10.

(Discharge chute)
The discharge chute 9 is provided on the downstream side Dd of the furnace body 2. The discharge chute 9 is located on the downstream side Dd of the after-combustion stage 13. The discharge chute 9 drops the incinerated material B, which has become ash after combustion, to an ash extrusion device or the like (not shown) located below the furnace main body 2.

(Details of stoker support structure)
Next, details of the stoker support structure 5 will be described with reference to FIGS. 2 to 5.

As shown in FIGS. 2 and 3, the stoker support structure 5 supports the stoker 10 on the pedestal 6. The stoker support structure 5 includes a first frame 20, a second frame 30, a support column 40, and a width direction diagonal member 50.

(first frame)
The first frame 20 is provided along the lower edge of the stoker main body 14. The first frame 20 extends horizontally and supports the stoker main body 14. The first frame 20 is formed in a lattice shape when viewed from above and below. One first frame 20 is provided in the drying stage 11, and one in each of the combustion stage 12 and the post-combustion stage 13.

First, the first frame 20 of the drying stage 11 will be explained.
In the drying stage 11, the first frame 20 is located above the first row of pedestals 61. The first frame 20 is inclined downward toward the downstream side Dd. The first frame 20 includes a first width direction frame 21 and a first conveyance direction frame 22. The frames constituting the first frame 20 are connected by welding.

The first width direction frame 21 is formed into a rod shape extending in the width direction W. Two first width direction frames 21 are provided spaced apart in the conveyance direction D. The first width direction frame 21 on the upstream side Du is located between the first pedestal row 61 and the second pedestal row 62 in the conveyance direction D. The first width direction frame 21 on the downstream side Dd is located directly above the second pedestal row 62 in the conveyance direction D.

The first transport direction frame 22 is formed into a rod shape extending in the transport direction D. A plurality of first transport direction frames 22 are provided at equal intervals in the width direction W. The plurality of first transport direction frames 22 are provided so as to overlap each other in the vertical direction with each pedestal 6 constituting the pedestal row 60. The first transport direction frame 22 connects two first width direction frames 21 spaced apart in the transport direction D. The outermost first transport direction frame 22 in the width direction W connects the ends of the two first width direction frames 21 spaced apart in the transport direction D in the width direction W.

Next, the first frame 20 of the combustion stage 12 and the after-combustion stage 13 will be explained. The same components as those of the first frame 20 of the drying stage 11 are given the same reference numerals, and the description thereof will be omitted as appropriate.
The first frame 20 of the combustion stage 12 and the after-combustion stage 13 is located below the first frame 20 of the drying stage 11. In the combustion stage 12 and the post-combustion stage 13, the first frame 20 is located above the second pedestal row 62, the third pedestal row 63, and the fourth pedestal row 64. The first frame 20 is inclined upward toward the downstream side Dd. The first frame 20 includes a first width direction frame 21, a first conveyance direction frame 22, and a first connection frame 23. The frames constituting the first frame 20 of the combustion stage 12 and the post-combustion stage 13 are connected by welding, similarly to the frames constituting the first frame 20 of the drying stage 11.

Three first width direction frames 21 are provided spaced apart in the conveyance direction D. One first width direction frame 21 is provided on the combustion stage 12 side, at the boundary between the combustion stage 12 and the after-combustion stage 13, and on the after-combustion stage 13 side. The first widthwise frame 21 of the combustion stage 12 is provided between the second row of pedestals 62 and the third row of pedestals 63 in the conveyance direction D. The first width direction frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13 is provided between the third pedestal row 63 and the fourth pedestal row 64 in the conveying direction D. The first width direction frame 21 of the after-combustion stage 13 is provided directly above the fourth row of pedestals 64. The first width direction frame 21 of the after combustion stage 13 is located above the first width direction frame 21 at the boundary between the combustion stage 12 and the after combustion stage 13.

The first transport direction frame 22 is provided in the stoker body 14 of the combustion stage 12 and the stoker body 14 of the post-combustion stage 13, respectively.

A plurality of first conveyance direction frames 22 of the combustion stage 12 are provided at equal intervals in the width direction W, similarly to the first conveyance direction frames 22 of the drying stage 11. In the combustion stage 12, every other first transport direction frame 22 is provided so as to overlap each pedestal 6 constituting the pedestal row 60 in the vertical direction. The first transport direction frame 22 of the combustion stage 12 is inclined upward toward the upstream side Du. The downstream end of the first transport direction frame 22 of the combustion stage 12 is provided above the first width direction frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13.

A plurality of first conveyance direction frames 22 of the post-combustion stage 13 are provided in line in the width direction W, similarly to the first conveyance direction frames 22 of the combustion stage 12. In the after-combustion stage 13, every other first transport direction frame 22 is provided so as to overlap each pedestal 6 constituting the pedestal row 60 in the vertical direction. The first conveyance direction frame 22 of the after-combustion stage 13 is inclined upward toward the downstream side Dd. The first conveying direction frame 22 of the after-combustion stage 13 connects the first width-direction frame 21 at the boundary between the combustion stage 12 and the after-combustion stage 13 and the first width-direction frame 21 of the after-combustion stage 13 .

One first connection frame 23 is provided at each downstream end of the first transport direction frame 22 of the combustion stage 12 . The first connection frame 23 extends in the vertical direction. The first connecting frame 23 connects the downstream end of the first transport direction frame 22 of the combustion stage 12 and the first frame 20 at the boundary between the combustion stage 12 and the after-combustion stage 13 .

(second frame)
One second frame 30 is provided for each of the drying stage 11, combustion stage 12, and post-combustion stage 13. The second frame 30 is connected to the first frame 20 in the transport direction D. The second frame 30 and the first frame 20 are connected by welding. The second frame 30 is provided below the drive unit 15 of each stoker 10. The second frame 30 extends horizontally and supports the drive unit 15. The second frame 30 includes a second width direction frame 31 and a second conveyance direction frame 32. The frames constituting the second frame 30 are connected by welding.

The second width direction frame 31 is formed into a rod shape extending in the width direction W. The second width direction frame 31 has a plurality of reaction force receiving parts 33. One reaction force receiving part 33 is provided for each drive part 15. The other end (drive base 18 ) of the drive unit 15 on the side opposite to the grate 16 is placed on the reaction force receiving unit 33 . The reaction force receiving portion 33 supports this drive base 18 .

The second transport direction frame 32 extends in the transport direction D. The second transport direction frame 32 connects the second width direction frame 31 and the first width direction frame 21. One second transport direction frame 32 is provided for each drive unit 15 . The second transport direction frame 32 supports the drive body 17 of the drive section 15 . As shown in FIG. 4 , the second transport direction frame 32 includes a main support member 34 and a mounting section 35 .

The main support member 34 extends in the conveying direction D from the reaction force receiving portion 33. A plurality of main supporting members 34 (in this embodiment, two main supporting members 34) are provided on one second conveyance direction frame 32 and spaced apart in the width direction W.
The mounting portion 35 is spanned across the plurality of main supports 34 in the width direction W. The drive main body 17 of the drive unit 15 is placed on the placement unit 35 .
Next, regarding the second frame 30, each of the drying stage 11, combustion stage 12, and post-combustion stage 13 will be explained.

As shown in FIGS. 2 and 3, in the drying stage 11, the second transport direction frame 32 is slightly inclined downward toward the upstream side Du. The inclination angle of the second transport direction frame 32 of the drying stage 11 in the transport direction D is smaller than the inclination angle of the first transport direction frame 22 of the drying stage 11 in the transport direction D.

In the combustion stage 12, the second transport direction frame 32 is inclined upward toward the upstream side Du. The angle of inclination of the second conveying direction frame 32 of the combustion stage 12 in the conveying direction D is greater than the inclination angle of the first conveying direction frame 22 of the combustion stage 12 in the conveying direction D.

In the after-combustion stage 13, the second conveying direction frame 32 is inclined upward toward the upstream side Du. The inclination angle of the second conveying direction frame 32 of the after-combustion stage 13 in the conveying direction D is larger than the inclination angle of the first conveying direction frame 22 of the after-combustion stage 13 in the conveying direction D.

(post)
The support column 40 is provided on the pedestal 6. The support column 40 extends upward from a lower end provided on the pedestal 6 and supports the first frame 20.

The strut 40 includes a direct strut 41 that directly connects the pedestal 6 and the first frame 20 and supports the first frame 20, and an indirect strut 42 that supports the first frame 20 via the second frame 30. .
From another perspective, the support column 40 includes a vertical member 43 that extends substantially perpendicularly to the horizontal plane, and a conveyance direction diagonal member 44 that extends in the conveyance direction D toward the top.

The lower end of each support column 40 is fixed to the base 6. Further, the upper end of each support column 40 is connected to the first frame 20 or the second frame 30 by welding.
Further, the inclination angle, number, length, etc. of the pillars 40 differ for each pedestal row 60. Therefore, details of the support columns 40 will be described below for each pedestal row 60.

In the first pedestal row 61, one direct support 41 and one indirect support 42 extend from each pedestal 6. The direct support column 41 extends from the pedestal 6 to the downstream side Dd, and connects the pedestal 6 and the first width direction frame 21 on the upstream side Du of the drying stage 11. The indirect support column 42 extends from the pedestal 6 to the downstream side Dd, and connects the pedestal 6 and the second width direction frame 31 of the drying stage 11. Both the direct strut 41 and the indirect strut 42 are diagonal members 44 in the conveyance direction.

In the second pedestal row 62, one direct support 41 and two indirect support 42 extend from each pedestal 6. The direct support column 41 extends from the pedestal 6 substantially perpendicularly to the horizontal plane, and connects the pedestal 6 and the downstream side Dd of the first transport direction frame 22 of the drying stage 11. The direct strut 41 is a vertical member 43. One indirect support column 42 extends to the upstream side Du and connects the pedestal 6 and the second width direction frame 31 of the combustion stage 12. Another indirect support column 42 extends to the downstream side Dd and connects the pedestal 6 and the second width direction frame 31 of the after-combustion stage 13. These two indirect struts 42 are diagonal members 44 in the conveyance direction.

In the third pedestal row 63, one direct support 41 and one indirect support 42 extend from each pedestal 6. The direct support column 41 extends from the pedestal 6 to the downstream side Dd, and connects the pedestal 6 and the first widthwise frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13. The direct support column 41 is a diagonal member 44 in the conveyance direction. The indirect strut 42 extends from the pedestal 6 to the upstream side Du, and connects the pedestal 6 and the second width direction frame 31 of the after-combustion stage 13.

In the fourth pedestal row 64, two columns 41 extend directly from each pedestal 6. One direct support column 41 extends from the pedestal 6 to the upstream side Du, and connects the pedestal 6 and the first widthwise frame 21 at the boundary between the combustion stage 12 and the after-combustion stage 13. This direct strut 41 is a diagonal member 44 in the conveyance direction. Another direct support column 41 extends from the pedestal 6 substantially perpendicularly to the horizontal plane and connects the pedestal 6 and the first widthwise frame 21 of the after-combustion stage 13 . This direct support 41 is a vertical member 43.

(width diagonal)
The width direction diagonal member 50 is provided on each pedestal 6 that constitutes the first pedestal row 61, the second pedestal row 62, and the third pedestal row 63. A plurality of width direction diagonal members 50 are provided on each pedestal 6. The width direction diagonal members 50 extend in an inclined manner so that the distance from each other in the width direction W increases upward from the lower end arranged on the pedestal 6.

As shown in FIG. 5, in this embodiment, four widthwise diagonal members 50 are provided on each pedestal 6. Two width direction diagonal members 50 are provided on one side in the width direction W, and two width direction diagonal members 50 are provided on the other side in the width direction W with respect to the support 40 provided on the same pedestal 6 as a reference. It is provided. The width direction diagonal members 50 are provided symmetrically in the width direction W with respect to the support columns 40 provided on the same pedestal 6. The width direction diagonal member 50 is inclined so as to be spaced apart from the support column 40 in the width direction W as it goes upward. The inclination angle of the width direction diagonal member 50 in the width direction W increases as the width direction diagonal member 50 is located on the outer side in the width direction W with respect to the pillar 40. Further, the upper ends of the widthwise diagonal members 50 are connected to each reaction force receiving portion 33, respectively.

The lower end of each width direction diagonal member 50 is fixed to the base 6. Furthermore, the upper end of each width direction diagonal member 50 is connected to the first frame 20 or the second frame 30 by welding.
Next, the width direction diagonal members 50 will be explained for each pedestal row 60.

In the first row of pedestals 61, the width direction diagonal member 50 extends from the pedestal 6 to the downstream side Dd, and connects the pedestal 6 and the second width direction frame 31 of the drying stage 11.

In the second row of pedestals 62, the width direction diagonal member 50 extends from the pedestal 6 to the upstream side Du, and connects the pedestal 6 and the second width direction frame 31 of the combustion stage 12.

In the third pedestal row 63, the width direction diagonal member 50 extends from the pedestal 6 to the upstream side Du, and connects the pedestal 6 and the second width direction frame 31 of the after-combustion stage 13.

(Triangular structure of stoker support structure)
In the stoker support structure 5 described above, a triangular structure is formed at each location by the first frame 20, the second frame 30, the struts 40, and the widthwise diagonal members 50.

For example, as shown in FIG. 2, in each stage of the drying stage 11, the combustion stage 12, and the post-combustion stage 13, as seen from the width direction W, the second transport frame and two supports extending from the same pedestal 6 40 also forms a triangular structure. Further, a triangular structure is formed by the second transport direction frame 32, the support column 40, and the width direction diagonal member 50. Furthermore, a triangular structure is formed by the first transport direction frame 22 of the after-combustion stage 13 and the two supports 40 extending from the pedestals 6 of the fourth pedestal row 64.

Further, for example, as shown in FIG. 5, a triangular structure is formed by the second conveyance direction frame 32, the support column 40, and the width direction diagonal member 50 when viewed from the conveyance direction D.

(effect)
Hereinafter, the effects of the stoker support structure 5 of this embodiment will be explained.
In this embodiment, the second frame 30 is connected to the first frame 20 in the conveyance direction D, and the other end (drive It has a reaction force receiving part 33 that supports the base part 18). Further, the plurality of width direction diagonal members 50 extend upward from the lower end disposed on the pedestal 6 so as to be spaced apart from each other in the width direction W, and each of the width direction diagonal members 50 extends toward each reaction force receiving portion 33. It is connected.

By the way, when the drive section 15 is driven, the drive section 15 receives a reaction force from the stoker main body 14. The reaction force that the drive unit 15 receives becomes larger at the other end (drive base 18) of the drive unit 15 on the opposite side from the grate 16. According to this embodiment, the reaction force receiving part 33 that supports the drive base 18 and the pedestal 6 are connected by the width direction diagonal member 50. Thereby, the reaction force of each drive section 15 is linearly transmitted to the base 6 by the width direction diagonal member 50. Thereby, the stoker support structure 5 can efficiently transmit the load received from above to the pedestal 6. Furthermore, while maintaining the strength of the stoker support structure 5 as a whole, the number of members necessary for ensuring the strength can be reduced. Therefore, the stoker support structure 5 can respond to a three-dimensionally complex load field while being lightweight as a whole.

In this embodiment, the support column 40 includes a conveyance direction diagonal member 44 that extends in the conveyance direction D as it goes upward.

According to this embodiment, the stoker support structure 5 can transmit a load from above, which is received at a position spaced apart from the pedestal 6 in the transport direction D, to the pedestal 6 by the transport direction diagonal member 44 . Thereby, while maintaining the strength of the stoker support structure 5 as a whole, the number of members necessary for ensuring the strength can be further reduced. Therefore, the weight of the stoker support structure 5 can be further reduced.

In this embodiment, the struts 40 include a direct strut 41 that directly connects the pedestal 6 and the first frame 20 and supports the first frame 20, and an indirect strut 41 that supports the first frame 20 via the second frame 30. 42. Thereby, the stoker support structure 5 can support the first frame 20 more firmly by the direct support pillars 41 and the indirect support pillars 42.

In this embodiment, the second frame 30 extends from the reaction force receiving part 33 in the conveyance direction D, and includes a plurality of main supports 34 provided spaced apart in the width direction W, and a plurality of main supports 34 in the width direction W. and a mounting section 35 on which the drive section 15 is mounted.

According to the present embodiment, the second frame 30 can distribute the downward load received from the drive unit 15 using the plurality of main supports 34 . Thereby, the strength of the second frame 30 can be improved. Therefore, the second frame 30 can support the drive unit 15 even more stably.

In the stoker support structure 5 of this embodiment, a triangular structure is formed at each location by the first frame 20, the second frame 30, the struts 40, and the widthwise diagonal members 50.

Thereby, the strength of the stoker support structure 5 can be further improved while reducing the weight of the stoker support structure 5.

<Second embodiment>
Hereinafter, a stoker support structure 205 according to a second embodiment of the present disclosure will be described with reference to FIG. 6. Configurations similar to those of the first embodiment described above will be given the same names and numerals, and descriptions thereof will be omitted as appropriate. FIG. 6 is a drawing corresponding to FIG. 5 of the first embodiment.

As shown in FIG. 6, in this embodiment, some of the plurality of reaction force receiving parts 33 are connected to the upper end of the indirect support column 42. As shown in FIG.
Thereby, the drive unit 15 can also be placed on the support column 40.

(Other embodiments)
Although the embodiment of the present disclosure has been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes design changes within the scope of the gist of the present disclosure. .

In the above embodiment, a case has been described in which one first frame 20 is provided in each of the drying stage 11, the combustion stage 12, and the post-combustion stage 13, but the present invention is not limited to this. In each of the drying stage 11, the combustion stage 12, and the post-combustion stage 13, the first frames 20 may be provided in multiple (for example, double) stacks in the vertical direction. Furthermore, if reinforcement is required, the first frames 20 stacked in the vertical direction may be connected with another frame, so that a triangular structure is formed between the first frames 20 stacked up and down.

In the above embodiment, two main supporting members 34 are provided for each second transport direction frame 32, but the present invention is not limited to this. The number of main supporting members 34 can be changed as appropriate.

In the above embodiment, each pedestal 6 is provided with four widthwise diagonal members 50, but the present invention is not limited to this. The number of width direction diagonals 50 can be changed as appropriate.

<Additional notes>
The stoker support structure 5, 205 described in each embodiment can be understood, for example, as follows.

(1) The stoker support structure 5, 205 according to the first aspect includes a stoker main body 14 having a grate 16 that incinerates the material to be incinerated B while conveying it in the horizontal direction, and A stoker support structure 5 that supports a stoker 10 on a plurality of pedestals 6, including a driving part 15 extending and having one end connected to the grate 16, and supporting the stoker main body 14 that extends in the horizontal direction. A first frame 20 , a column 40 provided on the pedestal 6 and extending upward from a lower end to support the first frame 20 , and connected to the first frame 20 in the transport direction D; A second frame 30 having a reaction force receiving part 33 that supports the other ends of the plurality of drive parts 15 arranged in parallel in the width direction W intersecting the conveyance direction D, and A plurality of width direction diagonal members 50 are provided, which extend in an inclined manner so that the distance from each other increases in the width direction W toward each other, and which are connected to each of the reaction force receiving portions 33, respectively.

According to this aspect, the reaction force of each drive unit 15 is linearly transmitted to the pedestal 6 by the width direction diagonal member 50. Thereby, the stoker support structure 5 can efficiently transmit the load received from above to the pedestal 6. Furthermore, while maintaining the strength of the stoker support structure 5 as a whole, the number of members necessary for ensuring the strength can be reduced.

(2) The stoker support structure 5, 205 of the second aspect is the stoker support structure 5, 205 of (1), wherein the support column 40 is a conveyance direction diagonal member extending in the conveyance direction D as it goes upward. 44 may be included.

According to this aspect, the stoker support structure 5, 205 can transmit a load from above, which is received at a position spaced apart from the pedestal 6 in the transport direction D, to the pedestal 6 by the transport direction diagonal member 44. Thereby, while maintaining the strength of the stoker support structure 5 as a whole, the number of members necessary for ensuring the strength can be further reduced.

(3) The stoker support structure 205 of the third aspect is the stoker support structure 205 of (1) or (2), in which the pillar 40 supports the first frame 20 via the second frame 30. The upper end of the indirect support 42 may be connected to some of the reaction force receiving parts 33 .

According to this aspect, the drive unit 15 can also be placed on the support column 40.

(4) The stoker support structure 5, 205 of the fourth aspect is the stoker support structure 205 according to any one of (1) to (3), in which the second frame 30 is A plurality of main supports 34 extending in the conveying direction D and provided spaced apart in the width direction W, and the drive unit 15 are placed across the plurality of main supports 34 in the width direction W. It may further include a mounting section 35.

According to this aspect, the second frame 30 can distribute the downward load received from the drive unit 15 using the plurality of main supports 34 .

1... Stoker furnace 2... Furnace body 3... Hopper 4... Feeder 5... Stoker support structure 6... Pedestal 7... Wind box 9... Discharge chute 10... Stoker 11... Drying stage 12... Combustion stage 13... After combustion stage 14... Stoker body 15... Drive part 16... Grate 17... Drive main body 18... Drive base 20... First frame 21... First width direction frame 22... First transport direction frame 23... First connection frame 30... Second frame 31... Second Width direction frame 32...Second conveyance direction frame 33...Reaction force receiving part 34...Main support member 35...Placement part 40...Strut 41...Direct support 42...Indirect support 43...Vertical member 44...Transportation direction diagonal member 50...Width Directional diagonal member 60...Pedestal row 61...First pedestal row 62...Second pedestal row 63...Third pedestal row 64...Fourth pedestal row 70...Primary air line B...Things to be incinerated D...Transportation direction Du...Upstream side Dd ...Downstream side V...Processing space W...Width direction

Claims (4)

A stoker having a stoker main body having a grate that incinerates the material to be incinerated while conveying it in the horizontal direction, and a drive section extending in the direction of conveyance of the material to be incinerated and having one end connected to the grate is mounted on a plurality of pedestals. A stoker support structure supported above,
a first frame that extends in the horizontal direction and supports the stoker main body;
a post provided on the pedestal and extending upward from a lower end to support the first frame;
a second frame that is connected to the first frame in the transport direction and has a reaction force receiving part that supports the other end of a plurality of drive parts arranged in parallel in a width direction intersecting the transport direction;
a plurality of widthwise diagonal members disposed on the pedestal, extending at an angle so that the distance from each other increases in the widthwise direction from a lower end thereof toward the top, and respectively connected to each of the reaction force receiving portions;
A stoker support structure comprising: The stoker support structure according to claim 1, wherein the support column includes a conveyance direction diagonal member that extends in the conveyance direction as it goes upward. The strut includes an indirect strut that supports the first frame via the second frame,
The stoker support structure according to claim 1 or 2, wherein an upper end of the indirect support column is connected to some of the reaction force receiving parts. The second frame is
a plurality of main supports extending from the reaction force receiving part in the conveying direction and spaced apart in the width direction;
a mounting section on which the driving section is mounted, spanning across the plurality of main supporting members in the width direction;
The stoker support structure according to claim 1 or 2, further comprising:

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