JP6967840B2 - Fuel supply system - Google Patents

Description

The present invention relates to a fuel supply system.

Conventionally, as a furnace for burning fuel, the one described in Patent Document 1 is known. In this furnace, fuels such as biomass fuel, which is an organic resource derived from animals and plants excluding fossil resources, are burned in the combustion furnace. A fuel supply system that supplies fuel to such a furnace may have a portion that conveys fuel using a belt conveyor.

Japanese Unexamined Patent Publication No. 2004-36490

Here, when the fuel is conveyed using the belt conveyor, the fuel may be scattered at the discharge portion of the belt conveyor. Therefore, there has been a demand for a fuel supply system in which fuel does not scatter at the discharge portion of the belt conveyor.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a fuel supply system capable of suppressing fuel scattering in a discharge portion of a belt conveyor.

In order to solve the above problems, the fuel supply system according to the present invention is a fuel supply system that supplies fuel into a furnace that burns fuel, and is a belt that conveys fuel and a rotary shaft member that guides the belt. A belt conveyor provided with the above, and a direction regulating member provided in the discharge portion of the belt conveyor to regulate the fuel ejection direction, and the direction regulating member is a member including a non-iron material.

This fuel supply system is provided in the discharge section of the belt conveyor and includes a direction regulating member that regulates the direction in which the fuel is ejected. In this way, the direction regulating member regulates the fuel ejection direction at the discharge portion of the belt conveyor, so that the fuel scattering can be suppressed. Since the direction regulating member is a member composed of a non-ferrous material, it is possible to prevent the generation of sparks and the like due to contact even when the fuel contains metal.

In the fuel supply system according to the present invention, the direction regulating members are arranged on both ends in the width direction of the belt, and are inclined so as to extend inward in the width direction from the upstream side to the downstream side in the transport direction of the belt conveyor. It's okay. With such a configuration, the fuel can be smoothly guided inward in the width direction on both ends in the width direction of the belt.

In the fuel supply system according to the present invention, a mounting member for mounting the directional control member to the peripheral structure of the directional control member may be further provided. With such a configuration, the material of the mounting member can be appropriately selected regardless of the material of the direction regulating member.

In the fuel supply system according to the present invention, the mounting member and the direction regulating member are arranged on the end side in the width direction of the belt, the mounting member is arranged outside the belt in the width direction, and the direction regulating member is arranged in the width direction. May extend inward from the belt. With such a configuration, it is possible to prevent the fuel discharged from the belt conveyor from coming into contact with the mounting member, while it is possible to bring the fuel into contact with the direction regulating member.

In the fuel supply system according to the present invention, the direction regulating member may be a member composed of a flame-retardant material. With such a configuration, it is possible to prevent the generation of sparks and the like due to contact with the direction regulating member.

In the fuel supply system according to the present invention, the direction regulating member may be a member composed of a material having a surface roughness lower than a predetermined value. With such a configuration, it is possible to prevent fuel from adhering to the direction regulating member.

In the fuel supply system according to the present invention, the direction regulating member extends in the vertical direction, and the upper end of the direction regulating member may extend above at least the portion of the belt arranged above the rotating shaft member. .. With such a configuration, it is possible to improve the certainty that the fuel discharged from the upper surface of the belt comes into contact with the direction regulating member.

In the fuel supply system according to the present invention, in the transport direction of the belt conveyor, a bucket for receiving the fuel ejected from the belt conveyor is provided on the downstream side of the belt conveyor and the direction regulating member, and the direction regulating member is the width of the belt. Arranged on both ends in the direction, the distance between the pair of direction-regulating members in the width direction may be smaller than the dimension in the width direction of the bucket. With such a configuration, it is possible to prevent the fuel discharged from the direction regulating member from falling without being received by the bucket.

According to the present invention, it is possible to suppress the scattering of fuel at the discharge portion of the belt conveyor.

FIG. 1 is a schematic configuration diagram showing a fuel supply system according to the present embodiment. FIG. 2 is a cross-sectional view showing a state when the conveyor of the fuel supply system according to the present embodiment is viewed from above. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. FIG. 4 is an enlarged view of the direction regulating member shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, the same or equivalent elements are designated by the same reference numerals, and duplicate description will be omitted.

FIG. 1 is a schematic configuration diagram showing a fuel supply system according to the present embodiment. As shown in FIG. 1, the fuel supply system 1 is a system that supplies fuel into a furnace 60 that burns fuel. The fuel supply system 1 includes a hopper 2, a conveyor 3, a bucket conveyor 4, a conveyor 6, a bunker 7, and a conveyor 8.

The hopper 2 is a device that stores fuel supplied from the outside and drops the fuel onto the lower conveyor 3 to supply the fuel. The conveyor 3 is a device that horizontally conveys fuel by the belt conveyor 10. One end side of the belt conveyor 10 is arranged below the hopper 2. The fuel that has fallen from the hopper 2 is supplied to one end side of the belt conveyor 10 and is conveyed to the other end side by the belt conveyor 10. A bucket conveyor 4 is provided on the other end side of the belt conveyor 10.

The bucket conveyor 4 is connected to the conveyor 3 on the lower end side, and is a device that upwardly conveys the fuel supplied from the conveyor 3 on the lower end side. The bucket conveyor 4 includes a belt conveyor 11 extending in the vertical direction and a bucket 12 connected to the belt conveyor 11. The bucket 12 is provided on the belt of the belt conveyor 11 at a predetermined pitch. The bucket 12 receives the fuel conveyed from the belt conveyor 10 of the conveyor 3 at the lower end side of the bucket conveyor 4. The bucket 12 that has received the fuel is conveyed upward by the belt conveyor 11. The bucket 12 is inverted on the upper end side of the bucket conveyor 4, and the held fuel is discharged from the discharge port 13 provided on the upper end side of the bucket conveyor 4.

The conveyor 6 horizontally conveys the fuel discharged from the discharge port of the bucket conveyor 4. The conveyor 6 conveys the fuel supplied from the bucket conveyor 4 on one end side to the other end side by a belt conveyor or a screw conveyor. The conveyor 6 drops the conveyed fuel into the bunker 7 on the other end side. The bunker 7 is a device for storing fuel conveyed from the transfer conveyor 6. A reclaimer 16 is provided at the bottom of the bunker 7. The reclaimer 16 is a member extending radially from the discharge port 17 provided at the center of the bottom of the bunker 7 to the outer peripheral side. The claimer 16 swivels around the discharge port 17 to collect fuel from the entire bottom surface of the bunker 7 and discharge the fuel from the discharge port 17. The conveyor 8 horizontally conveys the fuel that has fallen from the discharge port 17 of the bunker 7. The conveyor 8 conveys the fuel supplied from the bunker 7 on one end side to the other end side by a belt conveyor or a screw conveyor. The conveyor 8 drops the conveyed fuel into the furnace 60 on the other end side.

Next, the detailed configuration of the conveyor 3 will be described with reference to FIGS. 2 to 4. FIG. 2 is a view of the conveyor 3 from above. FIG. 3 is a cross-sectional view taken along the line III-III shown in FIG. FIG. 4 is an enlarged view of the direction regulating member. As shown in FIGS. 2 and 3, the conveyor belt 3 includes a belt conveyor 10 and a directional control structure 30.

The belt conveyor 10 includes a belt 21 for transporting fuel and a rotary shaft member 22 for guiding the belt 21. In the following description, the direction in which the fuel is conveyed by the belt conveyor 10 will be described as "transportation direction D1". The rotary shaft member 22 is a cylindrical member extending in the horizontal direction orthogonal to the transport direction D1. The rotary shaft member 22 is connected to a drive device (not shown) and is rotationally driven around the rotary axis CL2. A rotary shaft member 23 is provided at the upstream end in the transport direction D1 (see FIG. 1).

The belt 21 is an endless strip-shaped member bridged between the rotary shaft member 22 on the downstream side and the rotary shaft member 23 on the upstream side in the transport direction D1. Of the belt 21, the upper portion 24 extending horizontally between the upper end of the rotary shaft member 22 and the upper end of the rotary shaft member 23 moves in the transport direction D1 by the rotational drive of the rotary shaft member 22. Of the belt 21, the lower portion 26 extending horizontally between the lower end of the rotary shaft member 22 and the lower end of the rotary shaft member 23 moves in the direction opposite to the transport direction D1 due to the rotational drive of the rotary shaft member 22. The direction in which the rotary shaft member 22 extends along the rotary axis CL2 (horizontal direction orthogonal to the transport direction D1) corresponds to the width direction of the belt 21. In the following description, the width direction of the belt 21 is simply referred to as "width direction D2".

The fuel placed on the upper surface 24a of the upper portion 24 of the belt 21 is conveyed along the conveying direction D1. Further, the fuel ejects from the rotary shaft member 22 toward the transport direction D1 at the position of the rotary shaft member 22 on the downstream side. Therefore, the position near the rotary shaft member 22 corresponds to the discharge portion 50 of the belt conveyor 10.

The belt conveyor 10 is surrounded by peripheral wall portions 40 on all four sides of both the vertical direction and the width direction D2. The peripheral wall portion 40 is a rectangular tubular member that houses the belt conveyor 10 inside and extends in the horizontal direction. The peripheral wall portions 40 are arranged below the side wall portions 41A and 41B arranged on both ends of the width direction D2 of the belt conveyor 10, the upper wall portions 42 arranged above the belt conveyor 10, and below the belt conveyor 10. It is provided with a lower wall portion 43. The side wall portions 41A and 41B are arranged so as to be separated from the belt conveyor 10 to the outside in the width direction D2, and face each other so as to be parallel to each other in the width direction D2. The upper wall portion 42 and the lower wall portion 43 are arranged so as to be vertically separated from the belt conveyor 10 and face each other so as to be parallel to each other. The peripheral wall portion 40 is connected to the bucket conveyor 4 at the end portion in the transport direction D1. Specifically, the peripheral wall portion 40 is connected to the side wall portion 45 extending in the vertical direction in the bucket conveyor 4. The side wall portion 45 has an opening at a position where the peripheral wall portion 40 is connected. Therefore, the fuel conveyed from the belt conveyor 10 and discharged in the conveying direction D1 is supplied into the bucket conveyor 4 through the opening. In the bucket conveyor 4, the bucket 12 is provided at a position facing the belt conveyor 10 in the transport direction D1. The bucket 12 has a predetermined width dimension along the width direction D2. Therefore, the fuel discharged from the belt conveyor 10 is received by the bucket 12.

The directional control structure 30 includes a pair of directional control members 31A and 31B and a pair of mounting members 32A and 32B. The direction regulating members 31A and 31B and the mounting members 32A and 32B are provided on both ends of the width direction D2 with respect to the discharge portion 50 of the belt conveyor 10. Specifically, the direction regulating member 31A and the mounting member 32A are provided on the side wall portion 41A side in the width direction D2. The direction regulating member 31B and the mounting member 32B are provided on the side wall portion 41B side in the width direction D2. When the center line CL1 with respect to the width direction D2 of the belt conveyor 10 when viewed from above (as shown in FIG. 2) is set, the direction regulating member 31A and the mounting member 32A, and the direction regulating member 31B and the mounting member 32B Has a line-symmetrical structure. In the following description, "inside in the width direction" refers to the lower side of the paper surface in FIG. 2 for the direction regulating member 31A and the mounting member 32A, and indicates the upper side of the paper surface in FIG. 2 for the direction regulating member 31B and the mounting member 32B.

The mounting members 32A and 32B are members for mounting the direction regulating members 31A and 31B to the side wall portions 41A and 41B (peripheral structure of the direction regulating member). The mounting members 32A and 32B are members in which a plate-shaped member extending in the transport direction D1 is bent on the tip side. Specifically, the mounting members 32A and 32B have a joint portion 32a that is overlapped and joined to the side wall portions 41A and 41B on the upstream side in the transport direction D1 and a direction regulating member 31A on the downstream side in the transport direction D1. , 31B is provided with a fixing piece portion 32b for fixing. The fixed piece portion 32b is inclined so as to extend inward in the width direction D2 toward the transport direction D1 side. The material of the mounting members 32A and 32B is not particularly limited, and a metal material such as iron or non-ferrous metal may be applied, or a non-metal or the like may be applied.

The direction regulating members 31A and 31B are members provided in the discharge portion 50 of the belt conveyor 10 to regulate the fuel ejection direction. The direction regulating members 31A and 31B are inclined so as to extend inward in the width direction from the upstream side to the downstream side in the transport direction D1. In the present embodiment, the direction regulating members 31A and 31B are composed of plate-shaped members fixed to the fixing piece portions 32b of the mounting members 32A and 32B. The direction regulating members 31A and 31B are members including non-ferrous materials. The direction regulating members 31A and 31B may be any material such as rubber or a metal other than iron that does not generate sparks when colliding with a metal contained in the fuel. For example, the direction regulating members 31A and 31B may be members composed of a flame-retardant material such as flame-retardant rubber. Further, the direction regulating members 31A and 31B may be members composed of materials having a surface roughness lower than a predetermined value. For example, if the surface roughness of a rubbery member such as flame-retardant rubber is used, it is possible to prevent fuel from adhering. The surface roughness of the direction regulating members 31A and 31B is appropriately selected in consideration of the adhesive force of various fuels, and may be any member having a surface roughness or less to which the fuel does not adhere.

The configurations of the direction regulating members 31A and 31B will be described in more detail with reference to FIG. Although only the direction regulating member 31B is shown in FIG. 4, the direction regulating member 31A also has a configuration to the same effect. The outer end of the direction regulating member 31B in the width direction D2 is fixed to the fixing piece portion 32b of the mounting member 32B. In FIG. 4, the end portion of the direction regulating member 31B is overlapped and fixed on the back surface side of the fixed piece portion 32b, but may be overlapped on the front surface side. Further, the direction regulating member 31B is fixed to the fixing piece portion 32b by screwing, but the fixing method is not particularly limited, and the direction restricting member 31B may be fixed by a method such as a clamp. The direction regulating member 31B is inclined at the same angle as the fixed piece portion 32b. The angle θ of the direction restricting member 31B with respect to the side wall portion 41B may be set to 5 to 45 °. The angles of the direction regulating member 31B and the fixed piece portion 32b do not have to be the same, but may be different.

In addition, the positional relationship of each member will be described. As shown in FIG. 2, the mounting members 32A and 32B may be arranged outside the belt 21 in the width direction D2. In the present embodiment, the inner end portion 32c of the mounting members 32A and 32B in the width direction D2 is arranged outside the end portion 21a in the width direction D2 of the belt 21. At this time, the separation distance L2 between the mounting member 32A and the mounting member 32B in the width direction D2 is larger than the dimension L1 in the width direction D2 of the belt 21. Further, the direction regulating members 31A and 31B may extend inward from the belt 21 in the width direction D2. In the present embodiment, the inner end 31a of the direction regulating members 31A and 31B in the width direction D2 is arranged inside the end 21a in the width direction D2 of the belt 21. At this time, the separation distance L3 between the direction regulating member 31A and the direction regulating member 31B in the width direction D2 is smaller than the dimension L1 in the width direction D2 of the belt 21. The separation distance L3 corresponds to the dimension of the width direction D2 of the discharge range 51 of the discharge unit 50 after the pop-out direction is regulated by the direction regulating members 31A and 31B. Therefore, the relationship that the discharge range 51 is included in the width region of the belt 21 is established.

In the transport direction D1 of the belt conveyor 10, a bucket 12 for receiving the fuel ejected from the belt conveyor 10 is provided on the downstream side of the belt conveyor 10 and the direction regulating members 31A and 31B. The end portion of the bucket 12 on the side wall portion 41A side is referred to as "end portion 12aA", and the end portion on the side wall portion 41B side is referred to as "end portion 12aB". The inner end 31a of the direction regulating members 31A and 31B in the width direction D2 is arranged inside the ends 12aA and 12aB in the width direction D2 of the bucket 12. At this time, the separation distance L3 between the direction regulating member 31A and the direction regulating member 31B in the width direction D2 is smaller than the dimension in the width direction D2 of the bucket 12.

Here, the bucket 12 may be displaced in the width direction D2 during transportation. Even when the position of the bucket 12 is displaced in this way, it is preferable that the discharge range 51 by the direction regulating members 31A and 31B is included in the width region of the bucket 12. The position of the end portion 12aA of the bucket 12 when the misalignment of the bucket 12 becomes the largest on the side wall portion 41B side is defined as the end position position PG1 (indicated by a virtual line in FIG. 2). The position of the end portion 12aB of the bucket 12 when the misalignment of the bucket 12 becomes the largest on the side wall portion 41A side is defined as the end position position PG2 (indicated by a virtual line in FIG. 2). In this case, the inner end portion 31a of the direction regulating member 31A on the side wall portion 41A side is arranged inside the end portion position PG1 in the width direction D2. The inner end portion 31a of the direction regulating member 31B on the side wall portion 41B side is arranged inside the end portion position PG2 in the width direction D2.

Next, with reference to FIG. 3, the positional relationship of each component in the vertical direction will be described. Although only the direction regulating member 31A and the mounting member 32A are shown in FIG. 3, the direction regulating member 31B and the mounting member 32B also have the same configuration. As shown in FIG. 3, when viewed from the width direction D2, the direction regulating member 31A and the mounting member 32A are widened in the vertical direction. At least a part of the direction regulating member 31A and the mounting member 32A and the belt conveyor 10 are arranged so as to overlap each other in the vertical direction. The upper end 31b of the direction regulating member 31A may extend above at least the upper surface 24a of the upper portion 24 of the belt 21 arranged above the rotary shaft member 22. Although the upper end 31b of the direction regulating member 31A is arranged at a position separated downward from the upper wall portion 42, it may come into contact with the upper wall portion 42. The upper end 31b of the direction regulating member 31A may be arranged at a position below the upper surface 24a. Alternatively, the height position of the upper end 31b differs depending on the position in the transport direction D1, and only a part of the upper end 31b may be arranged above the upper surface 24a.

The lower end 31c of the direction regulating member 31A may extend downward from at least the lower surface 26a of the lower portion 26 of the belt 21 arranged below the rotary shaft member 22. Although the lower end 31c of the direction regulating member 31A is arranged at a position separated upward from the lower wall portion 43, it may come into contact with the lower wall portion 43. The lower end 31c of the direction regulating member 31A may be arranged at a position above the lower surface 26a. Alternatively, the height position of the lower end 31c differs depending on the position in the transport direction D1, and only a part of the lower end 31c may be arranged below the lower surface 26a.

The upper end 32d of the mounting member 32A has the same relationship as the upper end 31b of the direction regulating member 31A, and the lower end 32e of the mounting member 32A has the same relationship as the lower end 31c of the direction regulating member 31A. However, the upper end 32d and the lower end 32e of the mounting member 32A do not have to be at the same positions as the upper end 31b and the lower end 31c of the direction regulating member 31A.

Next, the operation / effect of the fuel supply system 1 according to the present embodiment will be described.

The fuel supply system 1 is provided in the discharge section 50 of the belt conveyor 10 and includes direction regulating members 31A and 31B that regulate the fuel ejection direction. In this way, the direction regulating members 31A and 31B regulate the fuel ejection direction at the discharge portion 50 of the belt conveyor 10, so that the fuel scattering can be suppressed. Further, since the direction regulating members 31A and 31B are members including non-ferrous materials, it is possible to prevent the generation of sparks and the like due to contact even when the fuel contains metal.

In the fuel supply system 1, the direction regulating members 31A and 31B are arranged on both ends in the width direction D2 of the belt 21 and extend inward in the width direction from the upstream side to the downstream side in the transport direction D1 of the belt conveyor 10. Tilt like. With such a configuration, the fuel can be smoothly guided inward in the width direction on both ends of the belt 21 in the width direction.

The fuel supply system 1 further includes mounting members 32A and 32B for mounting the direction regulating members 31A and 31B to the peripheral structures of the direction regulating members 31A and 31B. With such a configuration, the material of the mounting members 32A and 32B can be appropriately selected regardless of the material of the direction regulating members 31A and 31B. For example, in order to secure the mounting strength, unlike the direction regulating members 31A and 31B which are non-ferrous materials, steel may be adopted as the material of the mounting members 32A and 32B.

In the fuel supply system 1, the mounting members 32A and 32B and the direction regulating members 31A and 31B are arranged on the end side of the belt 21 in the width direction D2, and the mounting members 32A and 32B are arranged outside the belt 21 in the width direction D2. Arranged, the direction regulating members 31A and 31B extend inward from the belt 21 in the width direction D2. With such a configuration, it is possible to prevent the fuel discharged from the belt conveyor 10 from coming into contact with the mounting members 32A and 32B, while it is possible to bring the fuel into contact with the direction regulating members 31A and 31B.

In the fuel supply system 1, the direction regulating members 31A and 31B may be members including flame-retardant materials. With such a configuration, it is possible to prevent the direction regulating members 31A and 31B from burning.

In the fuel supply system 1, the direction regulating members 31A and 31B may be members composed of materials having a surface roughness lower than a predetermined value. With such a configuration, it is possible to prevent fuel from adhering to the direction regulating members 31A and 31B.

In the fuel supply system 1, the direction regulating members 31A and 31B extend in the vertical direction, and the upper end 31b of the direction regulating members 31A and 31B is at least the upper portion 24 of the belt 21 arranged above the rotary shaft member 22. It extends upwards. With such a configuration, it is possible to improve the certainty that the fuel discharged from the upper surface 24a of the belt 21 comes into contact with the direction regulating members 31A and 31B.

In the fuel supply system 1, in the transport direction D1 of the belt conveyor 10, a bucket 12 for receiving the fuel ejected from the belt conveyor 10 is provided on the downstream side of the belt conveyor 10 and the direction regulating members 31A and 31B. The direction regulating members 31A and 31B are arranged on both ends in the width direction D2 of the belt 21, and the separation distance L3 between the pair of direction regulating members 31A and 31B in the width direction D2 is larger than the dimension in the width direction D2 of the bucket 12. small. With such a configuration, it is possible to prevent the fuel discharged from the direction regulating members 31A and 31B from falling without being received by the bucket 12.

The present invention is not limited to the above-described embodiment.

For example, the direction regulating member in the above-described embodiment has a plate shape, but may have any shape as long as the direction of the fuel can be regulated. For example, it may have a polygonal columnar shape. Further, the positional relationship of the belt and the bucket in the width direction of the direction regulating member is not limited to the configuration of the above-described embodiment, and can be appropriately changed. Similarly, the shape of the mounting member is not particularly limited, and may be appropriately changed as long as the direction regulating member can be mounted on the peripheral structure.

Further, in the above-described embodiment, the entire direction regulating member is made of non-ferrous metal, but for example, even if only the surface portion in contact with the fuel is made of non-ferrous metal and the internal region is made of steel or the like. good.

Further, it is not necessary to have a mounting member, and the direction regulating member may be directly fixed to a peripheral structure such as a side wall portion.

1 ... Fuel supply system, 10 ... Belt conveyor, 12 ... Bucket, 21 ... Belt, 22 ... Rotating shaft member, 31A, 31B ... Direction control member, 31b ... Upper end, 32A, 32B ... Mounting member, 60 ... Furnace.

Claims (6)

A fuel supply system that supplies the fuel into a furnace that burns fuel.
A belt for transporting the fuel, a belt conveyor having a rotating shaft member for guiding the belt, and a belt conveyor.
A direction regulating member provided in the discharge portion of the belt conveyor and regulating the ejection direction of the fuel, and a direction regulating member.
A bucket provided on the downstream side of the belt conveyor and the direction regulating member in the transport direction of the belt conveyor and receiving the fuel ejected from the belt conveyor is provided.
The direction regulating member is a member composed of a non-ferrous material.
The direction restricting members are arranged on both ends in the width direction of the belt, and are inclined so as to extend inward in the width direction from the upstream side to the downstream side in the transport direction of the belt conveyor.
The direction regulating member is provided apart from each of the bucket and the belt, and extends in the vertical direction outside the belt when viewed from above the belt conveyor.
The upper end of the direction regulating member extends at least above the portion of the belt arranged above the rotary shaft member.
The lower end of the direction regulating members, than the portion disposed under the rotary shaft member of at least the belt extends to the lower way, the fuel supply system. The fuel supply system according to claim 1, further comprising a mounting member for mounting the direction regulating member to a peripheral structure of the direction regulating member. The mounting member and the direction regulating member are arranged on the end side in the width direction of the belt.
The mounting member is arranged outside the belt in the width direction.
The fuel supply system according to claim 2, wherein the direction regulating member extends inward from the belt in the width direction. The fuel supply system according to any one of claims 1 to 3, wherein the direction regulating member is a member including a flame-retardant material. The fuel supply system according to any one of claims 1 to 3, wherein the direction regulating member is a member including a material having a surface roughness lower than a predetermined value. The fuel supply system according to any one of claims 1 to 5, wherein the distance between the pair of direction-regulating members in the width direction is smaller than the dimension of the bucket in the width direction.

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