Stoker support structure

Abstract

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

Description

Technical Field

[0001] The present disclosure relates to a stoker support structure.

Background Art

[0002] Patent Document 1 discloses a support structure for large structures used in plants and the like. This support structure includes support beams that extend horizontally and are arranged in a grid pattern, and column feet that support the support beams. A plurality of support beams are arranged in a hierarchical manner in the vertical direction. A large structure is placed on each support beam.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the support structure described in Patent Document 1 is not designed to cope with a three-dimensional complex load field. For example, when the large structure to be supported is a stoker, the stoker includes a driving unit for transporting the incinerated material. The driving unit receives a reaction force when transporting the incinerated material. This reaction force is transmitted to the lower support structure. The support structure of Patent Document 1 only considers its own weight and is not optimized for the action of the reaction force transmitted from the driving unit. Therefore, in the above support structure, an overly complex and large number of members are used, and the problem is that the entire support structure becomes heavier.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a stoker support structure that can achieve weight reduction while coping with a three-dimensional complex load field.

Means for Solving the Problems

[0006] To solve the above problems, the stoker support structure according to the present disclosure is a stoker support structure that supports a stoker on a plurality of bases, the stoker having a stoker body having a grate for incinerating while transporting the material to be incinerated in a horizontal direction, and a drive unit extending in the transport direction of the material to be incinerated and having one end connected to the grate, the stoker support structure comprising: a first frame that extends horizontally and supports the stoker body; a support column that extends upward from a lower end provided on the base and supports the first frame; a second frame that is connected to the first frame in the transport direction and has a reaction force receiving portion that supports the other end of a plurality of drive units arranged in a width direction intersecting the transport direction; and a plurality of width-direction diagonal members that extend inclined upward from a lower end placed on the base so as the distance between them in the width direction increases, and each is connected to the respective reaction force receiving portion. [Effects of the Invention]

[0007] The stoker support structure of this disclosure can be made lightweight while accommodating complex three-dimensional load fields. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic diagram of a stoker according to the first embodiment of this disclosure. [Figure 2] This is a view of the stoker support structure according to the first embodiment of this disclosure, as seen from the width direction. [Figure 3] This is a perspective view of a stoker support structure according to the first embodiment of this disclosure. [Figure 4] This is an enlarged perspective view of the second frame according to the first embodiment of this disclosure. [Figure 5] This is a view of the widthwise diagonal member according to the first embodiment of this disclosure, as seen from the upstream side in the conveying direction. [Figure 6] This is a view of the widthwise diagonal member according to the second embodiment of this disclosure, as seen from the upstream side in the conveying direction. [Modes for carrying out the invention]

[0009] <First Embodiment> (Stoker furnace) Hereinafter, a stoker furnace 1 equipped with a stoker support structure 5 according to the first embodiment of this disclosure will be described with reference to Figures 1 to 5. The stoker furnace 1 according to this embodiment incinerates waste and the like as incinerated material B.

[0010] As shown in Figure 1, the stoker furnace 1 comprises a furnace body 2, a hopper 3, a feeder 4, a stoker 10, a stoker support structure 5, a base 6, a wind box 7, and a discharge chute 9.

[0011] (Furnace body) Inside the furnace body 2, a processing space V is formed for burning the material to be incinerated B. Furthermore, a passage is formed at the top of the furnace body 2 for exhausting the exhaust gas generated from the combustion of the material to be incinerated B through the processing space V. Primary combustion air is supplied to the processing space V from the wind box 7 (described in detail later), and secondary combustion air is supplied from the passage at the top of the furnace body 2. A stoker 10 (described in detail later) is also provided in the processing space V. In the processing space V, the material to be incinerated B is burned by the stoker 10 while being transported horizontally.

[0012] In the following, the direction in which the material to be incinerated B is transported in the horizontal direction will be simply referred to as the "transport direction D," the upstream side Du of the transport direction D will be simply referred to as the "upstream side Du," and the downstream side Dd of the transport direction D will be simply referred to as the "downstream side Dd." In addition, the width direction W of the stoker 10 that intersects the transport direction D in the horizontal direction will be simply referred to as the "width direction W" (see Figure 3). In this embodiment, the width direction W is perpendicular to the transport direction D.

[0013] Upstream of the furnace body 2, Du, is provided a hopper 3 and a feeder 4 for supplying the material to be incinerated B to the processing space V.

[0014] (Hoppa) Hopper 3 temporarily stores the material to be incinerated B. Hopper 3 is formed in a cylindrical shape with an opening in the vertical direction. The material to be incinerated B is supplied from the upper opening of hopper 3.

[0015] (Feeder) The feeder 4 is provided at the opening below the hopper 3. The feeder 4 connects the hopper 3 and the furnace body 2. The feeder 4 pushes out the incineration target B stored in the hopper 3 into the furnace body 2 by the stroke motion in the conveying direction D.

[0016] (Stoker) The stoker 10 is provided in the furnace body 2. The stoker 10 has, in order from the upstream side Du in the conveying direction D, a drying stage 11 for drying the incineration target B, a combustion stage 12 for burning the incineration target B, and a post-combustion stage 13 for completely incinerating (post-incinerating) the unburned matter. The drying stage 11 is arranged above the combustion stage 12 and the post-combustion stage 13. The stoker 10 has a stoker body 14 and a drive unit 15 for each of the drying stage 11, the combustion stage 12, and the post-combustion stage 13.

[0017] (Stoker body) The stoker body 14 has a fire grate 16. The fire grate 16 incinerates the incineration target B while conveying it in the conveying direction D. In the drying stage 11, the stoker body 14 is arranged to incline downward as it goes toward the downstream side Dd. In the combustion stage 12 and the post-combustion stage 13, the stoker body 14 is arranged to incline upward as it goes 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.

[0018] (Drive unit) The drive unit 15 is arranged on the upstream side Du of each stoker body 14. A plurality of drive units 15 are arranged in parallel at equal intervals in the width direction W. Each drive unit 15 extends in the conveying direction D of the incineration target B. One end on the downstream side Dd in the conveying direction D of the drive unit 15 is connected to the fire grate 16. The drive unit 15 operates the fire grate 16 to convey the incineration target B from the upstream side Du to the downstream side Dd.

[0019] The drive unit 15 is, for example, a hydraulic actuator. As shown in FIG. 2, the drive unit 15 has a drive body 17 and a drive base 18.

[0020] The drive unit 17 is formed in a rod shape extending in the conveying direction D. In the drying stage 11, the drive unit 17 is slightly inclined downwards toward the downstream side Dd. In the combustion stage 12 and post-combustion stage 13, the drive unit 17 is positioned to be inclined upwards toward the downstream side Dd.

[0021] The drive base 18 is provided at the upstream end of the drive body 17. The drive base 18 receives a reaction force from the grate 16 when the drive unit 15 is driven.

[0022] (Stoker support structure) As shown in Figure 1, the stoker support structure 5 is located inside the furnace body 2. The stoker support structure 5 is positioned 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.

[0023] (pedestal) The base 6 is provided, for example, on a part of the steel frame of the plant. The base 6 is located below the stoker 10. As shown in Figure 3, multiple bases 6 are arranged at equal intervals in the width direction W. The spacing of the bases 6 in the width direction W is greater than the spacing of the drive units 15 in the width direction W. In this embodiment, the bases 6 are provided so that their positions in the width direction W do not overlap with those of the drive units 15. Multiple bases 6 arranged in the width direction W form a base row 60 extending in the width direction W. In this embodiment, four base rows 60 are provided arranged in the transport direction D. Hereinafter, the base rows 60 will be referred to as the first base row 61, the second base row 62, the third base row 63, and the fourth base row 64, in order from the upstream side Du in the transport direction D.

[0024] The first base row 61 is located upstream of the drying stage 11 in Du. The first base row 61 is positioned so as to overlap vertically with the combustion stage 12 and the post-combustion stage 13. The second base row 62 is located directly below the downstream end Dd of the drying stage 11. The second base row 62 is located upstream of the combustion stage 12 and the post-combustion stage 13 in Du. The third base row 63 is located directly below the combustion stage 12. The fourth base row 64 is located directly below the downstream end Dd of the post-combustion stage 13. The second base row 62, the third base row 63, and the fourth base row 64 are located below the first base row 61 and are positioned in the same vertical direction.

[0025] (Wind box) As shown in Figure 1, the wind box 7 is positioned below the stoker 10. A primary air line 70 is connected to the wind box 7. Combustion primary air is supplied to the wind box 7 from the outside via the primary air line 70. The wind box 7 supplies the combustion primary air from below the stoker 10 towards the processing space V. This primary air is supplied to the material to be incinerated B on the stoker 10.

[0026] (Discharge chute) The discharge chute 9 is located downstream Dd of the furnace body 2. The discharge chute 9 is located downstream Dd of the post-combustion stage 13. The discharge chute 9 drops the incinerated material B, which has turned into ash after combustion, into an ash extrusion device (not shown) located below the furnace body 2.

[0027] (Details of the stoker support structure) Next, the stoker support structure 5 will be explained in detail with reference to Figures 2 to 5.

[0028] As shown in Figures 2 and 3, the stoker support structure 5 supports the stoker 10 on the base 6. The stoker support structure 5 comprises a first frame 20, a second frame 30, a support column 40, and a width-direction diagonal member 50.

[0029] (First frame) The first frame 20 is provided along the lower edge of the stoker body 14. The first frame 20 extends horizontally and supports the stoker body 14. When viewed from above, the first frame 20 is formed in a grid pattern. One first frame 20 is provided in the drying stage 11, and one each is provided in the combustion stage 12 and the post-combustion stage 13.

[0030] First, let's describe the first frame 20 of the drying stage 11. In the drying stage 11, the first frame 20 is located above the first base row 61. The first frame 20 is inclined downward toward the downstream side Dd. The first frame 20 has a first width-direction frame 21 and a first conveying-direction frame 22. Each frame constituting the first frame 20 is connected by welding.

[0031] The first widthwise frame 21 is formed in the shape of a rod extending in the width direction W. Two first widthwise frames 21 are provided spaced apart in the transport direction D. The first widthwise frame 21 on the upstream side Du is located between the first base row 61 and the second base row 62 in the transport direction D. The first widthwise frame 21 on the downstream side Dd is located directly above the second base row 62 in the transport direction D.

[0032] The first conveying direction frame 22 is formed in the shape of a rod extending in the conveying direction D. Multiple first conveying direction frames 22 are provided at equal intervals in the width direction W. The multiple first conveying direction frames 22 are provided so as to overlap vertically with each base 6 that makes up the base row 60, with every other frame being provided. The first conveying direction frame 22 connects two first width direction frames 21 that are spaced apart in the conveying direction D. The outermost first conveying direction frame 22 in the width direction W connects the ends in the width direction W of two first width direction frames 21 that are spaced apart in the conveying direction D.

[0033] Next, the first frames 20 of the combustion stage 12 and the post-combustion stage 13 will be described. Components common to the first frame 20 of the drying stage 11 will be given the same reference numerals and their descriptions will be omitted as appropriate. The first frame 20 of the combustion stage 12 and the post-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 base row 62, the third base row 63, and the fourth base row 64. The first frame 20 is inclined upward toward the downstream side Dd. The first frame 20 has a first width direction frame 21, a first conveying direction frame 22, and a first connecting frame 23. Each frame constituting the first frame 20 of the combustion stage 12 and the post-combustion stage 13 is connected by welding, similar to each frame constituting the first frame 20 of the drying stage 11.

[0034] Three first widthwise frames 21 are provided spaced apart in the transport direction D. One first widthwise frame 21 is provided on the combustion stage 12 side, one at the boundary between the combustion stage 12 and the post-combustion stage 13, and one on the post-combustion stage 13 side. The first widthwise frame 21 of the combustion stage 12 is provided between the second base row 62 and the third base row 63 in the transport direction D. The first widthwise frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13 is provided between the third base row 63 and the fourth base row 64 in the transport direction D. The first widthwise frame 21 of the post-combustion stage 13 is provided directly above the fourth base row 64. The first widthwise frame 21 of the post-combustion stage 13 is located above the first widthwise frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13.

[0035] The first conveying direction frame 22 is provided on the stoker body 14 of the combustion stage 12 and the stoker body 14 of the later combustion stage 13, respectively.

[0036] The first conveying direction frames 22 of the combustion stage 12 are provided in multiples at equal intervals in the width direction W, similar to the first conveying direction frames 22 of the drying stage 11. In the combustion stage 12, the multiple first conveying direction frames 22 are provided so as to overlap vertically with each base 6 that constitutes the base row 60, with every other frame being provided. The first conveying direction frames 22 of the combustion stage 12 are inclined upward as they move toward the upstream side Du. The downstream end of the first conveying direction frames 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.

[0037] The first conveying direction frames 22 of the post-combustion stage 13 are arranged in multiples in the width direction W, similar to the first conveying direction frames 22 of the combustion stage 12. In the post-combustion stage 13, the multiple first conveying direction frames 22 are arranged so as to overlap vertically with each base 6 that constitutes the base row 60, with every other frame in between. The first conveying direction frames 22 of the post-combustion stage 13 are inclined upward as they move toward the downstream side Dd. The first conveying direction frames 22 of the post-combustion stage 13 connect the first width direction frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13 to the first width direction frame 21 of the post-combustion stage 13.

[0038] The first connecting frames 23 are provided one at each of the downstream ends of the first conveying direction frames 22 of the combustion stage 12. The first connecting frames 23 extend in the vertical direction. The first connecting frames 23 connect the downstream end of the first conveying direction frame 22 of the combustion stage 12 to the first frame 20 at the boundary between the combustion stage 12 and the post-combustion stage 13.

[0039] (Second frame) The second frame 30 is provided in each of the drying stage 11, the combustion stage 12, and the post-combustion stage 13. The second frame 30 is connected to the first frame 20 in the conveying 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 has a second width direction frame 31 and a second conveying direction frame 32. Each frame constituting the second frame 30 is connected by welding.

[0040] The second widthwise frame 31 is formed in the shape of a rod extending in the width direction W. The second widthwise frame 31 has a plurality of reaction force receiving parts 33. One reaction force receiving part 33 is provided for each drive unit 15. The other end of the drive unit 15 opposite to the grate 16 (drive base 18) is placed on the reaction force receiving part 33. The reaction force receiving part 33 supports this drive base 18.

[0041] The second conveying direction frame 32 extends in the conveying direction D. The second conveying direction frame 32 connects the second width direction frame 31 and the first width direction frame 21. One second conveying direction frame 32 is provided for each drive unit 15. The second conveying direction frame 32 supports the drive body 17 of the drive unit 15. As shown in Figure 4, the second conveying direction frame 32 has a main support member 34 and a mounting portion 35.

[0042] The main support member 34 extends from the reaction force receiving portion 33 in the transport direction D. Multiple main support members 34 (two in this embodiment) are provided on one second transport direction frame 32, spaced apart in the width direction W. The mounting section 35 is spanned across multiple main support members 34 in the width direction W. The drive body 17 of the drive unit 15 is mounted on the mounting section 35. Next, the second frame 30 will be explained for each stage: the drying stage 11, the combustion stage 12, and the post-combustion stage 13.

[0043] As shown in Figures 2 and 3, in the drying stage 11, the second conveying direction frame 32 is slightly inclined downwards as it approaches the upstream side Du. The inclination angle of the second conveying direction frame 32 of the drying stage 11 in the conveying direction D is smaller than the inclination angle of the first conveying direction frame 22 of the drying stage 11 in the conveying direction D.

[0044] In the combustion stage 12, the second conveying direction frame 32 is inclined upward as it approaches the upstream side Du. The inclination angle of the second conveying direction frame 32 in the combustion stage 12 in the conveying direction D is greater than the inclination angle of the first conveying direction frame 22 in the combustion stage 12 in the conveying direction D.

[0045] In the post-combustion stage 13, the second conveying direction frame 32 is inclined upward as it approaches the upstream side Du. The inclination angle of the second conveying direction frame 32 in the post-combustion stage 13 in the conveying direction D is greater than the inclination angle of the first conveying direction frame 22 in the post-combustion stage 13 in the conveying direction D.

[0046] (post) The support column 40 is mounted on the base 6. The support column 40 extends upward from its lower end, which is mounted on the base 6, and supports the first frame 20.

[0047] The support column 40 includes a direct support column 41 that directly connects the base 6 and the first frame 20 to support the first frame 20, and an indirect support column 42 that supports the first frame 20 via the second frame 30. From another perspective, the support column 40 includes a vertical member 43 extending substantially perpendicular to the horizontal plane and a conveying direction diagonal member 44 extending upward in the conveying direction D.

[0048] The lower end of each support column 40 is fixed to the base 6. Furthermore, the upper end of each support column 40 is welded to the first frame 20 or the second frame 30. Furthermore, the angle of inclination, number, and length of the support columns 40 differ for each of the 60 base rows. Therefore, the details of the support columns 40 will be described below for each of the 60 base rows.

[0049] In the first row of bases 61, one direct support column 41 and one indirect support column 42 extend from each base 6. The direct support column 41 extends from the base 6 to the downstream side Dd and connects the base 6 to the first widthwise frame 21 on the upstream side Du of the drying stage 11. The indirect support column 42 extends from the base 6 to the downstream side Dd and connects the base 6 to the second widthwise frame 31 of the drying stage 11. Both the direct support column 41 and the indirect support column 42 are conveying direction inclined members 44.

[0050] In the second row of bases 62, one direct support 41 and two indirect support 42 extend from each base 6. The direct support 41 extends from the base 6 approximately perpendicular to the horizontal plane and connects the base 6 to the downstream side Dd of the first conveying direction frame 22 of the drying stage 11. The direct support 41 is a vertical member 43. One indirect support 42 extends upstream to Du and connects the base 6 to the second width direction frame 31 of the combustion stage 12. Another indirect support 42 extends downstream to Dd and connects the base 6 to the second width direction frame 31 of the post-combustion stage 13. These two indirect support 42 are conveying direction diagonal members 44.

[0051] In the third row of bases 63, one direct support 41 and one indirect support 42 extend from each base 6. The direct support 41 extends downstream Dd from base 6 and connects base 6 to the first widthwise frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13. The direct support 41 is a conveying direction diagonal member 44. The indirect support 42 extends upstream Du from base 6 and connects base 6 to the second widthwise frame 31 of the post-combustion stage 13.

[0052] In the fourth base row 64, two direct support columns 41 extend from each base 6. One direct support column 41 extends upstream Du from the base 6 and connects the base 6 to the first widthwise frame 21 at the boundary between the combustion stage 12 and the post-combustion stage 13. This direct support column 41 is a conveying direction diagonal member 44. The other direct support column 41 extends approximately perpendicular to the horizontal plane from the base 6 and connects the base 6 to the first widthwise frame 21 of the post-combustion stage 13. This direct support column 41 is a vertical member 43.

[0053] (width diagonal) The width-direction diagonal members 50 are provided on each base 6 that constitutes the first base row 61, the second base row 62, and the third base row 63. Multiple width-direction diagonal members 50 are provided on each base 6. The width-direction diagonal members 50 extend inclined so that the spacing between them in the width direction W widens as they move upward from the lower end positioned on the base 6.

[0054] As shown in Figure 5, in this embodiment, four width-direction diagonal members 50 are provided on each base 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 column 40 provided on the same base 6. The width-direction diagonal members 50 are provided symmetrically in the width direction W with respect to the support column 40 provided on the same base 6. The width-direction diagonal members 50 are inclined upwards and therefore move away from the support column 40 in the width direction W. The angle of inclination of the width-direction diagonal member 50 in the width direction W increases as it is located further outward in the width direction W relative to the support column 40. The upper ends of the width-direction diagonal members 50 are each connected to the respective reaction force receiving parts 33.

[0055] The lower end of each widthwise diagonal member 50 is fixed to the base 6. Furthermore, the upper end of each widthwise diagonal member 50 is connected to the first frame 20 or the second frame 30 by welding. Next, we will explain the width-direction diagonal members 50 for each row of bases 60.

[0056] In the first base row 61, the widthwise diagonal members 50 extend from the base 6 to the downstream side Dd, connecting the base 6 to the second widthwise frame 31 of the drying stage 11.

[0057] In the second base row 62, the widthwise diagonal members 50 extend from the base 6 to the upstream side Du, connecting the base 6 to the second widthwise frame 31 of the combustion stage 12.

[0058] In the third base row 63, the widthwise diagonal members 50 extend from the base 6 to the upstream side Du, connecting the base 6 to the second widthwise frame 31 of the post-combustion stage 13.

[0059] (Triangular structure of the stoker support structure) In the stoker support structure 5 described above, triangular structures are formed at each location by the first frame 20, the second frame 30, the support column 40, and the widthwise diagonal members 50.

[0060] For example, as shown in Figure 2, when viewed from the width direction W, a triangular structure is formed in each stage of the drying stage 11, combustion stage 12, and post-combustion stage 13 by the second transport frame and two support columns 40 extending from the same base 6. Also, a triangular structure is formed by the second transport direction frame 32, the support columns 40, and the width direction diagonal members 50. Furthermore, a triangular structure is formed by the first transport direction frame 22 of the post-combustion stage 13 and the two support columns 40 extending from the base 6 of the fourth base row 64.

[0061] Furthermore, as shown in Figure 5, for example, a triangular structure is formed by the second conveying direction frame 32, the support column 40, and the widthwise diagonal member 50 when viewed from the conveying direction D.

[0062] (Effects and Benefits) The following describes the effects and advantages of the stoker support structure 5 of this embodiment. In this embodiment, the second frame 30 is connected to the first frame 20 in the transport direction D and has reaction force receiving portions 33 that support the other ends (drive base portions 18) of a plurality of drive units 15 arranged in parallel in the width direction W intersecting the transport direction D. Furthermore, the plurality of width-direction diagonal members 50 extend inclined so that the spacing between them in the width direction W widens as they move upward from their lower ends placed on the base 6, and each is connected to the respective reaction force receiving portion 33.

[0063] Incidentally, when the drive unit 15 is driven, the drive unit 15 receives a reaction force from the stoker body 14. The reaction force received by the drive unit 15 is greatest at the other end of the drive unit 15 (drive base 18) opposite to the grate 16. In this embodiment, the reaction force receiving part 33 that supports the drive base 18 and the base 6 are connected by a widthwise diagonal member 50. As a result, the reaction force of each drive unit 15 is transmitted linearly to the base 6 by the widthwise diagonal member 50. This allows the stoker support structure 5 to efficiently transmit the load received from above to the base 6. Furthermore, the stoker support structure 5 as a whole can reduce the number of members required to ensure strength while maintaining overall strength. Therefore, the stoker support structure 5 can cope with complex three-dimensional load fields while achieving overall weight reduction.

[0064] In this embodiment, the support column 40 includes a conveying direction diagonal member 44 that extends in the conveying direction D as it moves upward.

[0065] According to this embodiment, the stoker support structure 5 can transmit the load received from above at a position spaced apart from the base 6 in the transport direction D to the base 6 by the transport direction diagonal member 44. As a result, the stoker support structure 5 as a whole can maintain its strength while further reducing the number of members required to ensure strength. Therefore, the stoker support structure 5 can be made even lighter.

[0066] In this embodiment, the support column 40 includes a direct support column 41 that directly connects the base 6 and the first frame 20 to support the first frame 20, and an indirect support column 42 that supports the first frame 20 via the second frame 30. As a result, the stoker support structure 5 can more firmly support the first frame 20 with the direct support column 41 and the indirect support column 42.

[0067] In this embodiment, the second frame 30 has a plurality of main support members 34 that extend from the reaction force receiving portion 33 in the transport direction D and are spaced apart in the width direction W, and a mounting portion 35 that spans the plurality of main support members 34 in the width direction W and on which the drive unit 15 is placed.

[0068] According to this embodiment, the second frame 30 can distribute the downward load received from the drive unit 15 by a plurality of main support members 34. This improves the strength of the second frame 30. Therefore, the second frame 30 can support the drive unit 15 more stably.

[0069] In the stoker support structure 5 of this embodiment, triangular structures are formed at each location by the first frame 20, the second frame 30, the support column 40, and the widthwise diagonal members 50.

[0070] This makes it possible to reduce the weight of the stoker support structure 5 while further improving its strength.

[0071] <Second Embodiment> Hereinafter, the stoker support structure 205 according to the second embodiment of this disclosure will be described with reference to Figure 6. For components similar to those in the first embodiment described above, the same names and reference numerals will be used, and their descriptions will be omitted as appropriate. Figure 6 is a drawing corresponding to Figure 5 of the first embodiment.

[0072] As shown in Figure 6, in this embodiment, some of the reaction force receiving parts 33 among the multiple reaction force receiving parts 33 are connected to the upper end of the indirect support column 42. This allows the drive unit 15 to be mounted on the support column 40 as well.

[0073] (Other embodiments) Although embodiments of this disclosure have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and may include design changes and the like that do not depart from the gist of this disclosure.

[0074] In the above embodiment, a case was described in which one first frame 20 is provided in the drying stage 11, the combustion stage 12, and the post-combustion stage 13, but it is not limited to this. In each stage of the drying stage 11, combustion stage 12, and post-combustion stage 13, the first frames 20 may be stacked vertically and provided in multiple layers (for example, double layers). Furthermore, if reinforcement is necessary, the vertically stacked first frames 20 may be connected with another frame so that a triangular structure is formed between the vertically stacked first frames 20.

[0075] In the above embodiment, two main support members 34 are provided for each second conveying direction frame 32, but this is not limited to this configuration. The number of main support members 34 can be changed as appropriate.

[0076] In the above embodiment, four diagonal members 50 in the width direction are provided on each base 6, but this is not limited to this. The number of diagonal members 50 in the width direction can be changed as appropriate.

[0077] <Note> The stoker support structure 5,205 described in each embodiment can be understood, for example, as follows.

[0078] (1) The stoker support structure 5,205 according to the first embodiment is a stoker support structure 5 that supports a stoker 10 on a plurality of bases 6, the stoker 10 having a stoker body 14 having a grate 16 for incinerating material B while transporting it horizontally, and a drive unit 15 extending in the transport direction D of the material B to be incinerated, with one end connected to the grate 16, the stoker support structure 5 comprises a first frame 20 that extends horizontally and supports the stoker body 14, a support column 40 that extends upward from a lower end provided on the base 6 and supports the first frame 20, a second frame 30 that is connected to the first frame 20 in the transport direction D and has a reaction force receiving portion 33 that supports the other end of a plurality of drive units 15 arranged in a width direction W intersecting the transport direction D, and a plurality of width-direction diagonal members 50 that extend inclined so as they extend upward from a lower end on the base 6, with the spacing between them increasing in the width direction W, and each connected to the respective reaction force receiving portion 33.

[0079] In this embodiment, the reaction force of each drive unit 15 is transmitted linearly to the base 6 by the widthwise diagonal members 50. As a result, the stoker support structure 5 can efficiently transmit the load received from above to the base 6. Furthermore, the stoker support structure 5 as a whole can reduce the number of members required to ensure strength while maintaining overall strength.

[0080] (2) The stoker support structure 5,205 of the second embodiment is the stoker support structure 5,205 of (1), wherein the support column 40 may include a conveying direction diagonal member 44 that extends in the conveying direction D as it extends upward.

[0081] According to this embodiment, the stoker support structure 5,205 can transmit the load received from above at a position spaced apart from the base 6 in the transport direction D to the base 6 by the transport direction diagonal member 44. As a result, the stoker support structure 5 as a whole can maintain its strength while further reducing the number of members required to ensure strength.

[0082] (3) The stoker support structure 205 of the third embodiment is the stoker support structure 205 of (1) or (2), wherein the support column 40 includes an indirect support column 42 that supports the first frame 20 via the second frame 30, and the upper end of the indirect support column 42 may be connected to a part of the reaction force receiving portion 33.

[0083] According to this embodiment, the drive unit 15 can also be mounted on the support column 40.

[0084] (4) The stoker support structure 5,205 of the fourth embodiment is a stoker support structure 205 of any of (1) to (3), wherein the second frame 30 further comprises a plurality of main support members 34 extending from the reaction force receiving portion 33 in the transport direction D and spaced apart in the width direction W, and a mounting portion 35 that spans the plurality of main support members 34 in the width direction W and on which the drive unit 15 is placed.

[0085] According to this embodiment, the second frame 30 can distribute the downward load received from the drive unit 15 by a plurality of main support members 34. [Explanation of Symbols]

[0086] 1...Stoker furnace 2...Furnace body 3...Hopper 4...Feeder 5...Stoker support structure 6...Base 7...Wind box 9...Discharge chute 10...Stoker 11...Drying stage 12...Combustion stage 13...Post-combustion stage 14...Stoker body 15...Drive unit 16...Grille 17...Drive unit 18...Drive base 20...First frame 21...First width direction frame 22...First conveying direction frame 23...First connecting frame 30...Second frame 31...Second width direction frame 32...Second conveying direction frame 33...Reaction force receiving part 34...Main support member 35...Placement part 40...Support column 41...Direct support column 42...Indirect support column 43...Vertical member 44...Conveying direction diagonal member 50...Width direction diagonal member 60...Base row 61...First base row 62...Second base row 63...Third base row 64…Fourth pedestal row 70…Primary air line B…Material to be incinerated D…Conveying direction Du…Upstream side Dd…Downstream side V…Processing space W…Width direction

Claims

1. A stoker support structure that supports a stoker having a stoker body with a grate for incinerating materials while transporting them horizontally, and a drive unit extending in the direction of transport of the materials to be incinerated and having one end connected to the grate, on a plurality of bases, The first frame, which extends horizontally and supports the stoker body, A support column extending upward from its lower end, which is provided on the base, and supporting the first frame, A second frame is connected to the first frame in the conveying direction and has reaction force receiving portions that support the other ends of a plurality of drive units arranged in parallel in the width direction intersecting the conveying direction, Multiple widthwise diagonal members are arranged on the base, extending upward from the lower end, with the spacing between them increasing in the width direction, and each is connected to the respective reaction force receiving portion. A stoker support structure equipped with this feature.

2. The stoker support structure according to claim 1, wherein the support column includes a conveying direction diagonal member that extends in the conveying direction as it extends upward.

3. The support column includes an indirect support column that supports the first frame via the second frame, The stoker support structure according to claim 1 or 2, wherein the upper end of the indirect support column is connected to a portion of the reaction force receiving portion.

4. The aforementioned second frame is Multiple main support members are provided extending from the reaction force receiving portion in the conveying direction and spaced apart in the width direction, A mounting section is provided which is spanned across multiple main support members in the width direction and on which the drive unit is mounted, The stoker support structure according to claim 1 or 2, further comprising the above.

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