Ash conveying device

Abstract

To provide an ash conveying device capable of receiving large, fallen ash without damage. [Solution] The ash conveying device receives and conveys ash generated in the combustion equipment. The ash conveying device comprises a conveying body, a drive unit, and a buffer unit. The conveying body is arranged in a loop shape and conveys ash by placing it on the conveying surface. The drive unit generates power to move the conveying body in a loop shape. The buffer unit is positioned below the conveying body in at least a portion of the area where ash falls from the combustion equipment, and uses an elastic material to mitigate the impact of the falling ash that is transmitted through the conveying body.

Description

Technical Field

[0001] This application mainly relates to an ash conveying device for conveying ash generated in combustion equipment.

Background Art

[0002] Patent Document 1 discloses a belt conveyor for conveying ash. The conveying surface of the belt conveyor is composed of a plurality of plates arranged side by side. The plurality of plates are arranged so that some of them overlap each other. In Patent Document 1, a configuration is disclosed in which the conveying surface is shaped so as to be flat even when the plates are overlapped, thereby enhancing the impact resistance.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Even when the conveying surface is made flat as disclosed in Patent Document 1, for example, when receiving large-sized ash that has fallen, a large load may be instantaneously applied, and in that case, the plate itself (the conveying body itself) may not be able to withstand the impact and may be damaged. Therefore, improvement has been demanded.

[0005] This application has been made in view of the above circumstances, and its main object is to provide an ash conveying device that can receive large-sized fallen ash without damage.

Means for Solving the Problems

[0006] The problems to be solved by this application are as described above. Next, the means for solving these problems and their effects will be described.

[0007] From the perspective of this application, an ash conveying device having the following configuration is provided: that is, a device for receiving and conveying ash generated in a combustion facility. The ash conveying device comprises a conveying body, a drive unit, and a buffer unit. The conveying body is arranged in a loop shape and conveys ash by placing it on the conveying surface. The drive unit generates power to move the conveying body in a loop shape. The buffer unit is positioned below the conveying body in at least a portion of the area where ash falls from the combustion facility and uses an elastic body to mitigate the impact of the falling ash that is transmitted through the conveying body. [Effects of the Invention]

[0008] According to this application, it is possible to provide an ash conveying device that can receive large fallen ash without damaging it. [Brief explanation of the drawing]

[0009] [Figure 1] A schematic side view of an ash conveying device according to one embodiment of this application. [Figure 2] Perspective view of the chain and conveyor. [Figure 3] Exploded perspective view of the chain and conveyor. [Figure 4] Perspective view of the buffer section. [Figure 5] AA is a cross-sectional view showing the state of the leaf spring in the buffer section before and after deformation. [Figure 6] A perspective view showing an example of applying a buffer section to a belt conveyor. [Figure 7] A perspective view showing an example of applying a buffer section, including a disc spring, to a belt conveyor. [Modes for carrying out the invention]

[0010] Next, embodiments of this application will be described with reference to the drawings. Figure 1 shows a part of the combustion equipment 100. The combustion equipment 100 is equipment for burning materials, and is, for example, an incinerator, a firing facility, or a power generation facility. The ash generated in the combustion equipment 100 can vary, and may include, for example, powdery ash that is scattered along with the gas, granular ash that falls due to gravity, and ash with very large particle size that causes a large impact when it falls. In the following, ash with very large particle size that causes a large impact when it falls may be referred to as "large ash".

[0011] Ash generated in the combustion equipment 100 is supplied to the ash conveying device 1. In this embodiment, a hopper is provided below the combustion chamber in the combustion equipment 100, and ash is supplied from the combustion equipment 100 to the ash conveying device 1 by dropping the ash through the hopper. Note that the configuration using a hopper is just one example, and ash may also be conveyed to the ash conveying device 1 using a slope or a conveying device, etc.

[0012] The ash conveying device 1 is a device that conveys the ash generated in the combustion equipment 100 to the next process. The ash conveying device 1 in this embodiment is connected to the combustion equipment 100 and is a device that temporarily conveys the ash generated in the combustion equipment 100. In other words, there is no conveying device that conveys ash between the combustion equipment 100 and the ash conveying device 1. Therefore, the ash supplied to the ash conveying device 1 is often at a high temperature, and the particle shape of the ash also varies. At least a part of the ash conveying device 1 in this embodiment can also be applied to a conveying device that further conveys ash conveyed by another conveying device.

[0013] As shown in Figure 1, the ash conveying device 1 includes an outer casing 10. The outer casing 10 covers various components that make up the ash conveying device 1. The outer casing 10 has an input port 11, an output port 12, and a bottom 13. The input port 11 is connected to the combustion equipment 100 and is the part where ash is supplied from the combustion equipment 100. The output port 12 is connected to the equipment for the next process and is the part where the ash conveying device 1 discharges the ash it has conveyed. The next process is, for example, ash crushing, ash cooling, or further ash conveying. The bottom 13 is the part that makes up the bottom of the outer casing 10. The ash supplied to the ash conveying device 1 is scattered or falls from the conveyor described later, so ash accumulates on the bottom 13.

[0014] The ash conveying device 1 conveys ash using a conveyor 20. The conveyor 20 in this embodiment is a chain conveyor, and specifically comprises a drive unit 21, a drive sprocket 22, a chain 23, and a driven sprocket 24.

[0015] The drive unit 21 is, for example, an electric motor and a reduction gear, and generates power to drive the conveyor 20. The drive unit 21 may be located inside or outside the outer casing 10. The drive unit 21 is not limited to an electric motor. For example, if the conveyor 20 is a hydraulic conveyor, the drive unit 21 may be a hydraulic motor.

[0016] The drive sprockets 22 are provided in pairs, arranged in the direction of the rotation axis. The drive unit 21 transmits power to each of the pair of drive sprockets 22. A chain 23 is wrapped around each of the pair of drive sprockets 22. The chain 23 is further wrapped around the driven sprocket 24. As a result, power is transmitted to the driven sprocket 24 via the chain 23, causing the driven sprocket 24 to rotate in a driven manner. Thus, the conveyor 20 in this embodiment is a chain conveyor. The drive sprockets 22 are rotationally driven by the drive unit 21 and correspond to "rotating parts" that transmit power to the conveying body 30, which will be described later. The conveyor 20 is not limited to a chain conveyor and may be other conveyors such as a belt conveyor.

[0017] Between the pair of chains 23, a carrier 30 shown in FIG. 2 is arranged. The carrier 30 is arranged in a range including the space between the pair of chains 23, and carries ash placed on the carrying surface 30a. In the following description, in the carrying surface 30a, the direction orthogonal to the moving direction is referred to as the width direction.

[0018] The carrier 30 is arranged in a loop shape and moves so as to circulate along a loop-shaped path. The range in which the carrier 30 moves includes a range in which the carrying surface 30a faces upward and a range in which the carrying surface 30a faces downward. Facing upward means that the upward direction is included in the component of the normal line of the carrying surface 30a, and includes facing obliquely upward. The same applies to the downward direction.

[0019] Also, as shown below, a "first inversion range", a "second inversion range", and an "inner range" are defined. The first inversion range is a range where the carrying surface 30a switches from facing downward and moving straight to facing upward and moving straight. The second inversion range is a range where the carrying surface 30a switches from facing upward and moving straight to facing downward and moving straight. The inner range is the inner range surrounded by the carrier 30 arranged in a loop shape. Since it is difficult to completely seal the inner range, ash also exists in the inner range.

[0020] The conveyor 20 includes a chain plate 26 shown in FIG. 3 as a member for attaching the carrier 30. The chain plate 26 is a kind of chain attachment. The chain plate 26 is a plate fixed to the surface of the chain 23 facing the inner side in the width direction. One chain plate 26 is fixed for each link of the chain 23. Mounting holes are formed in the chain plate 26. The chain plate 26 is arranged at both ends in the width direction of the carrier 30 and corresponds to a "moving part" that moves together with the carrier 30.

[0021] The carrier 30 includes a plurality of link parts 31, mesh sheets 32, fastening parts 33, and side plates 34, respectively.

[0022] The link sections 31 are attached to the chain plates 26 located at both ends in the width direction, connecting the pair of chain plates 26 in the width direction. Specifically, the mounting holes formed in the link sections 31 and the mounting holes formed in the chain plates 26 are aligned and attached using fasteners such as bolts and nuts. Note that the use of fasteners is just one example; for example, they may also be attached by welding. The link sections 31 are elongated members, and are arranged so that their longitudinal direction coincides with the width direction. In addition, the link sections 31 arranged along the direction of movement of the conveyor body 30 are spaced apart.

[0023] The configuration in which each link portion 31 is individually attached to the chain plate 26 is just one example and can be changed. For example, multiple link portions 31 may be connected together to a relay member, and the relay member may be connected to the chain 23.

[0024] The mesh sheet 32 ​​is a metal, mesh-like sheet, or in other words, a wire mesh. The mesh sheet 32 ​​is attached to the link section 31. One mesh sheet 32 ​​is placed for multiple link sections 31. Gaps are formed between adjacent mesh sheets 32. The gaps between the mesh sheets 32 overlap with the gaps between the link sections 31. Hereafter, these gaps will be referred to as "gaps between the conveying bodies 30".

[0025] The mesh sheet 32 ​​is attached to the link portion 31 using fastening portion 33. The fastening portion 33 is a flat plate-shaped member with mounting holes formed therein. Specifically, the mesh sheet 32 ​​is attached by aligning the mounting holes formed in the link portion 31, the mesh sheet 32, and the fastening portion 33, and fastening the mounting fixture, thereby sandwiching the mesh sheet 32 ​​between the link portion 31 and the fastening portion 33. Note that this is just one example of how to attach the mesh sheet 32, and it may be attached without fastening portion 33.

[0026] The side plates 34 are located at both ends in the width direction and are erected outward from the conveying surface 30a along the height direction. The side plates 34 prevent ash from falling outward in the width direction from the conveying body 30. In this embodiment, the side plates 34 are integrated with the fastening part 33, but they may be separate. In addition, adjacent side plates 34 are arranged to overlap in the direction of movement. This makes it difficult for gaps to form between the side plates 34, thus preventing ash from falling. Furthermore, even when the conveying path changes from a straight line to an oblique direction or reverses, contact between adjacent side plates 34 can be suppressed.

[0027] The conveyor body 30 of this embodiment is equipped with multiple mesh sheets 32. Therefore, when a mesh sheet 32 ​​is damaged, only the damaged mesh sheet 32 ​​needs to be replaced, thus reducing the effort and cost involved in repairing damaged mesh sheets 32. In particular, since gaps are formed between the mesh sheets 32, there is no need to connect the mesh sheets 32 together, which further reduces the effort involved.

[0028] Furthermore, if the conveyor 30 is composed of a single wire mesh, stretching that occurs in one part will be transmitted to other parts. For example, if stretching occurs in several places on the left side of the wire mesh, these stretches will accumulate, causing the left side of the wire mesh to deform and stretch significantly. As a result, the left side of the wire mesh will curve outward in the width direction, causing meandering. In contrast, since the conveyor 30 of this embodiment is composed of multiple mesh sheets 32, stretching that occurs in one mesh sheet 32 ​​is less likely to be transmitted to another mesh sheet 32. As a result, bending and meandering of the conveyor 30 are less likely to occur. In particular, in this embodiment, gaps are formed between the mesh sheets 32, making it even less likely for stretching in one mesh sheet 32 ​​to be transmitted to another mesh sheet 32.

[0029] Furthermore, the conveying surface 30a in this embodiment is the surface of the mesh sheet 32. Since the mesh sheet 32 ​​is made of metal and has a mesh structure, it has excellent heat dissipation properties. Therefore, high-temperature ash can be cooled efficiently.

[0030] Next, the buffer section 70 will be described with reference to Figures 1, 4, and 5.

[0031] When the large ash described above falls from the combustion equipment 100 onto the conveyor 30, a large load is instantaneously applied to the conveyor 30, causing it to experience a strong impact. To mitigate this impact, the ash conveying device 1 is equipped with a buffer section 70. In the following description, the state in which no load is applied to the conveyor 30 means that no load other than its own weight is applied to the conveyor 30, and in particular, no large ash is on the conveyor 30. In other words, it is the state before the ash conveying device 1 is installed and put into operation. On the other hand, the state in which a load is applied to the conveyor 30 means that a load other than its own weight is applied to the conveyor 30, and in particular, large ash is on the conveyor 30.

[0032] As shown in Figure 1, the buffer section 70 is positioned to support the conveyor 30 located directly below the input opening 11. More specifically, the buffer section 70 is positioned in the area projected downward from the input opening 11 and below the conveyor 30 (particularly the conveyor 30 on the side where the conveying surface 30a faces upward).

[0033] In this embodiment, multiple buffer units 70 are arranged to cover this range. This means that if one buffer unit 70 is damaged, only the damaged buffer unit 70 needs to be replaced, thus reducing the effort and cost of replacement. The number of buffer units 70 installed is arbitrary; there may be one or multiple.

[0034] The buffer section 70 is separate from the transport body 30 and is movable relative to it. Therefore, even if the transport body 30 moves, the buffer section 70 does not move.

[0035] As shown in Figure 4, the cushioning section 70 comprises a frame 71, a spring base 72, a leaf spring 73, a base section 74, a contact section 75, and a regulating surface 76. The leaf spring 73 corresponds to an "elastic body." Other examples of elastic bodies include disc springs, coil springs, and rubber shock absorbers, which will be described later.

[0036] The frame 71 is the part to which each part constituting the cushioning section 70 is supported or attached. The frame 71 is a box-shaped member with an open top. The frame 71 may also be composed of rod-shaped or plate-shaped members combined together. As shown in Figure 5, the frame 71 is supported by the frame support section 92. The frame support section 92 is not connected to the transport body 30, and the frame support section 92 does not move even when the transport body 30 moves. The frame support section 92 is, for example, a part of the frame that supports the transport body 30. Since the cushioning section 70 is supported by the frame support section 92, the cushioning section 70 does not move even when the transport body 30 moves.

[0037] The spring base 72 is mounted on the frame 71 and is a base that supports the leaf spring 73. In this embodiment, the spring base 72 supports one end and the other end of the leaf spring 73, respectively. Therefore, the area of ​​the leaf spring 73 excluding both ends corresponds to the deformation area. A space is formed between the two spring bases 72. This space functions as a deformation space for deforming the leaf spring 73. Note that if a deformation space is formed in the frame 71, the leaf spring 73 can be supported by the frame 71 and the spring base 72 can be omitted.

[0038] The leaf springs 73 are stacked and placed on a spring base 72. Multiple leaf springs 73 have through holes formed at the same position, and multiple leaf springs 73 are attached together to a frame 71 or spring base 72. The thickness direction of the leaf springs 73 is parallel to the vertical direction, and the longitudinal direction of the leaf springs 73 is parallel to the width direction. Therefore, the leaf springs 73 are arranged in a range that includes the center in the width direction of the transport body 30. Multiple stacked leaf springs 73 are also referred to as "one set of leaf springs". In this embodiment, one set of leaf springs is arranged at one end of one buffer section 70 in the direction of movement of the transport body 30, and another set of leaf springs is arranged at the other end in the direction of movement. This allows the load to be distributed and received when a load is applied to the transport body 30.

[0039] The base portion 74 is a base member that transmits the load of the large ash to the leaf spring 73. The base portion 74 comprises a main body portion 74a that receives the load of the large ash and a transmission portion 74b that transmits the load received by the main body portion 74a to the leaf spring 73. The base portion 74 is arranged to connect a pair of leaf springs.

[0040] The contact portion 75 is a part provided on the upper surface of the base portion 74. The contact portion 75 is positioned opposite the back surface of the conveyor 30. Here, as shown in the upper diagram of Figure 5, in this embodiment, when no load is applied to the conveyor 30, the upper surface of the contact portion 75 and the lower surface of the conveyor 30 are spaced apart. As a result, when no large ash is placed on the conveyor 30, the conveyor 30 and the buffer portion 70 do not come into contact. Therefore, the buffer portion 70 does not resist the movement of the conveyor 30, and wear on both the conveyor 30 and the buffer portion 70 can be reduced. Note that it is not essential to keep them spaced apart; they may be in contact.

[0041] As shown in the lower diagram of Figure 5, when the conveyor 30 receives large ash, the conveyor 30 bends downward, and the back surface of the conveyor 30 comes into contact with the upper surface of the contact portion 75. Since the conveyor 30 continues to move, the conveyor 30 and the contact portion 75 rub against each other. In this embodiment, the coefficient of friction between the back surface of the conveyor 30 and the upper surface of the contact portion 75 is smaller than the coefficient of friction between the back surface of the conveyor 30 and the upper surface of the base portion 74. Therefore, the degree of wear can be reduced compared to the case where the upper surface of the base portion 74 is in contact. The coefficient of friction mentioned here is, in detail, the coefficient of dynamic friction of sliding friction. The contact portion 75 may be formed by surface treatment of the base portion 74, or the contact portion 75 may be attached to the base portion 74. The contact portion 75 is, for example, a dense bar, but it may be made of a different material.

[0042] Furthermore, the impact of the large ash falling is transmitted from the conveyor 30 to the base 74 via the contact portion 75. As a result, the impact is transmitted from the transmission portion 74b to the leaf spring 73 (more specifically to the middle portion of the leaf spring 73 in the longitudinal direction). Consequently, the middle portion of the leaf spring 73 deforms downward. As described above, a deformation space is formed in this embodiment, so the leaf spring 73 can be sufficiently deformed. This allows the impact of the large ash falling to be gradually transmitted to the buffer portion 70, thereby mitigating the impact.

[0043] Furthermore, depending on the weight of the large ash, there is a concern that the leaf spring 73 may deform to the point of being damaged. To suppress damage to the leaf spring 73, in this embodiment, a restricting surface 76 is formed on the lower surface of the deformation space. As shown in Figure 5, when no load is applied to the conveyor 30, the distance from the lower surface of the leaf spring 73 to the restricting surface 76 is called the "separation distance". In this embodiment, the restricting surface 76 is part of the frame 71, but another member may be used as the restricting surface 76. The restricting surface 76 is a surface located below the leaf spring 73, and when the leaf spring 73 deforms excessively, it comes into contact with the leaf spring 73 and suppresses further deformation. This suppresses damage to the leaf spring 73. Excessive deformation means that the amount of deformation of the leaf spring 73 exceeds the separation distance.

[0044] As described above, the conveyor 20 of this embodiment is not limited to a chain conveyor. For example, the buffer section 70 can also be applied to the belt conveyor 95 shown in Figure 6. The belt conveyor 95 comprises a belt 96 and a plurality of rollers 97 that support the belt 96. The buffer section 70 is then placed between the plurality of belts 96.

[0045] The cushioning section 70 shown in Figure 6 differs from the above embodiment only in the shape of the frame 71; the spring base 72 and leaf spring 73, which are parts for mitigating impact, have the same configuration as in the above embodiment.

[0046] Figure 7 shows a buffer section 70 in which disc springs 80 are used instead of leaf springs 73. The disc springs 80 are positioned at positions corresponding to both ends in the width direction of the conveyor body 30. Each disc spring 80 is housed in a spring case 81. Above the disc springs 80 are a first transmission member 82 and a second transmission member 83, which transmit the load applied to the conveyor body 30 to the disc springs 80. Note that the detailed structure can be modified as appropriate, as long as the load applied to the conveyor body 30 is received by the disc springs 80.

[0047] Figure 7 shows an example of applying a buffer section 70 using a disc spring 80 to a belt conveyor 95, but a buffer section 70 using a disc spring 80 can also be applied to a chain conveyor.

[0048] As described above, the ash conveying device 1 of this embodiment receives and conveys ash generated in the combustion equipment 100. The ash conveying device 1 comprises a conveying body 30, a drive unit 21, and a buffer unit 70. The conveying body 30 is arranged in a loop shape and conveys ash by placing it on the conveying surface 30a. The drive unit 21 generates power to circulate the conveying body 30 in a loop shape. The buffer unit 70 is positioned below the conveying body 30 in at least a portion of the area where ash falls from the combustion equipment 100, and uses a leaf spring 73 to mitigate the impact of the falling ash that is transmitted through the conveying body 30. The above is Feature 1.

[0049] Even if large ash falls from the combustion equipment 100, the impact of the falling ash is mitigated by the buffer section 70. Therefore, the load on each part of the ash conveying device 1 can be reduced.

[0050] In the ash conveying device 1 of this embodiment, when no load is applied to the conveying body 30, the lower surface of the conveying body 30 and the upper surface of the buffer portion 70 are separated. This is feature 2.

[0051] As a result, the transport body 30 and the buffer 70 are not in constant contact, so the buffer 70 does not create resistance when the transport body 30 moves.

[0052] In the ash conveying device 1 of this embodiment, the buffer section 70 has a deformable portion that deforms downward when pressed by the conveying body 30 when a downward load is applied to the conveying body 30. When no load is applied to the conveying body 30, a deformable space is formed below the deformable portion. The above is Feature 3.

[0053] This allows the deformation of the cushioning section 70 to occur when a downward load is applied to the transport body 30.

[0054] In the ash conveying device 1 of this embodiment, the buffer section 70 has a leaf spring 73 arranged along the width direction of the conveying body 30. A deformation space is formed below the leaf spring 73 and in a range that includes the center of the conveying body 30 in the width direction. The above is feature 4.

[0055] As a result, shocks can be absorbed using leaf springs 73 (relatively long leaf springs 73) arranged along the width direction of the conveyor 30, thus providing a high shock absorption effect.

[0056] In the ash conveying device 1 of this embodiment, a restricting surface 76 is provided below the leaf spring 73 with a separation distance between them, and contacts the leaf spring 73 to receive it when the deformation amount of the leaf spring 73 reaches the separation distance. The above is the feature 5.

[0057] This prevents the leaf spring 73 from breaking.

[0058] In the ash conveying device 1 of this embodiment, the buffer portion 70 has a contact portion 75 and a base portion 74. The contact portion 75 constitutes the upper surface of the buffer portion 70 and contacts the conveying body 30 when a downward load is applied to the conveying body 30. The base portion 74 is located below the contact portion 75 and to which the contact portion 75 is attached. The coefficient of friction between the upper surface of the contact portion 75 and the back surface of the conveying body 30 is smaller than the coefficient of friction between the upper surface of the base portion 74 and the back surface of the conveying body 30. These are the features 6.

[0059] Compared to a configuration where the back surface of the conveyor 30 contacts the base portion 74, the frictional force when the conveyor 30 and the cushioning portion 70 come into contact can be reduced.

[0060] In the ash conveying device 1 of this embodiment, multiple buffer units 70 are arranged in the direction of movement of the conveying body 30. These are the features 7.

[0061] This allows only the damaged part of the cushioning unit 70 to be replaced when it is damaged, thereby reducing the effort and cost involved in replacing the cushioning unit 70.

[0062] Any combination of features 1 through 7 described above can be used. For example, feature N (N=1,2,...,7) can be combined with at least one of features 1 through N-1 as appropriate.

[0063] Preferred embodiments of this application have been described above, but the above configuration can be modified as follows, for example. Modifications may be made individually, or multiple modifications may be made in any combination.

[0064] The conveyor 20 in the above embodiment includes a portion that moves horizontally and a portion that moves diagonally upward. Alternatively, the conveyor 20 may consist only of a portion that moves horizontally.

[0065] The bottom 13 where the ash accumulates is not limited to a flat surface, but may also be sloped.

[0066] The components of the conveyor 20 are not limited to being connected using fasteners; they may also be connected by other methods, such as welding.

[0067] The driven sprocket 24 may be placed in the first reversal range, or the drive sprocket 22 may be placed in the second reversal range. [Explanation of Symbols]

[0068] 1. Ash conveying device 20 Conveyors 30 Conveyor 70 Buffer 71 frames 72 Spring base 73 Leaf spring 74 Base section 75 Contact area 76 Regulatory aspects

Claims

1. In an ash conveying device that receives and transports ash generated in a combustion facility, A conveying body arranged in a loop, which carries ash on its conveying surface, A drive unit that generates power to move the conveying body in a loop shape, In at least a portion of the area where ash falls from the combustion equipment, a buffer is provided below the conveyor body, which uses an elastic body to mitigate the impact of the falling ash that is transmitted through the conveyor body, An ash conveying device equipped with the following features.

2. The ash conveying device according to claim 1, An ash conveying device in which, when no load is applied to the conveying body, the lower surface of the conveying body and the upper surface of the buffer portion are separated.

3. The ash conveying device according to claim 1, The elastic body has a deformable portion that deforms downward when pressed by the conveyor when a downward load is applied to the conveyor. An ash conveying device in which, when no load is applied to the conveying body, a deformation space is formed below the deformation location.

4. The ash conveying device according to claim 3, The cushioning portion has a leaf spring arranged along the width direction of the conveyor, An ash conveying device in which the deformation space is formed below the leaf spring and in a range that includes the center in the width direction of the conveying body.

5. The ash conveying device according to claim 4, An ash conveying device comprising a restricting surface positioned below the leaf spring at a distance apart, which contacts and supports the leaf spring when the amount of deformation of the leaf spring reaches the distance apart.

6. The ash conveying device according to claim 1, The aforementioned buffer portion is The upper surface of the buffer portion comprises a contact portion that comes into contact with the conveyor when a downward load is applied to the conveyor, A base portion located below the contact portion to which the contact portion is attached, It has, An ash conveying device wherein the coefficient of friction between the upper surface of the contact portion and the back surface of the conveying body is smaller than the coefficient of friction between the upper surface of the base portion and the back surface of the conveying body.

7. The ash conveying device according to claim 1, An ash conveying device in which multiple buffer units are arranged in the direction of movement of the conveying body.

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