Conveyor frame, washing chute, and method for attaching the washing chute to the conveyor frame.

Abstract

The present invention provides a conveyor frame, a wash chute, and a method for attaching the wash chute to the conveyor frame, which allows for easy installation of the wash chute from a pair of walkways installed on both sides of the conveyor frame in the width direction, even when the wash chute is installed after the conveyor frame has been installed on-site. [Solution] The conveyor frame 20 is constructed by combining a plurality of frame members 21, 22, 23, 24, 25, 26, 28 in the longitudinal direction, and supports a conveyor belt 10 that transports raw material P. A pair of walkways 40 are installed on both outer sides in the width direction relative to the frame members, and it is equipped with a longitudinally extending washing chute 30 for collecting powdery material from the raw material P that falls from the conveyor belt 10. The washing chute 30 is equipped with reinforcing members 34a, 34b that reinforce the washing chute 30 and is attached to a pair of chute support members 29 provided at both ends in the width direction of the conveyor frame 20.

Description

Technical Field

[0001] The present invention relates to a conveyor frame, a water washing chute, and a method for attaching the water washing chute to the conveyor frame.

Background Art

[0002] Raw materials such as iron ore, sintered ore, and coke handled in a steelworks are generally transported using a belt conveyor device. The belt conveyor device generally includes a conveyor belt that is endless wound around a head pulley and a tail pulley to transport raw materials, and a conveyor frame that supports the head pulley, the tail pulley, and the conveyor belt. The conveyor frame is configured by combining a plurality of frame members so as to extend in the longitudinal direction in a truss shape, and is supported by a plurality of columns at required locations in the longitudinal direction. The head pulley is provided on one end side in the longitudinal direction of the conveyor frame, and the tail pulley is provided on the other end side in the longitudinal direction of the conveyor frame.

[0003] In a belt conveyor device, since powdery substances contained in raw materials adhere to the surface of the conveyor belt, a belt cleaner is provided at the discharge part or the like to remove the powdery substances adhering to the surface of the conveyor belt. However, since all of the powdery substances adhering to the surface of the conveyor belt cannot be removed by the belt cleaner, a part of the adhering powdery substances may be peeled off and dropped due to the vibration of the return side belt while being carried on the return side belt as it is. There is a problem that the dropped powdery substances accumulate on the frame members below the conveyor frame. And when the accumulated powdery substances contain moisture due to rain or watering, it promotes the corrosion of the conveyor frame and shortens the life of the conveyor frame.

[0004] In order to reduce the accumulation of powdery substances on such a conveyor frame, conventionally, for example, the conveyor frame shown in Patent Document 1 and the conveyor frame shown in Patent Document 2 have been proposed.

[0005] The conveyor frame shown in Patent Document 1 is made of steel pipes, particularly the lower chord, which is a component of the conveyor frame that is prone to the accumulation of powdery materials.

[0006] Furthermore, the conveyor frame shown in Patent Document 2 is constructed in which the frame members positioned below the lower belt in the conveyor frame are made of pipes. Furthermore, there are also known conveyor frames that are equipped with a water washing chute to collect the conveyed materials that have fallen onto the water washing chute. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2001-328717 [Patent Document 2] Japanese Patent Publication No. 2013-119478 [Overview of the Initiative] [Problems that the invention aims to solve]

[0008] In the case of the conventional conveyor frames shown in Patent Documents 1 and 2, the lower chord members and frame members on which powdery material accumulates are made of steel pipes or other materials. While this can reduce the amount of powdery material that accumulates on the lower chord members and frame members, it cannot eliminate the accumulation entirely.

[0009] On the other hand, when a water-washing chute is installed on the conveyor frame and the conveyed material that falls onto the water-washing chute is collected, the conveyed material does not accumulate on the frame members, and by washing the water-washing chute with water, the conveyed material can be collected into another chute.

[0010] However, when installing a wash chute on a conveyor frame, it is necessary to attach multiple chute mounting members at predetermined intervals along the cross-sectional direction of the conveyor frame (the width direction perpendicular to the longitudinal direction). This is to prevent deflection of the wash chute in the cross-sectional direction (width direction) by attaching multiple chute mounting members at predetermined spans along the cross-sectional direction of the conveyor frame and attaching the wash chute via these multiple chute mounting members. Here, these multiple chute mounting members are generally attached when the conveyor frame is manufactured (during on-site installation), and are usually attached at least three locations: both ends and the center of the wash chute in the cross-sectional direction. However, if one attempts to install the wash chute after the conveyor frame has been installed on-site, the distance from the pair of walkways installed on both sides of the conveyor frame in the cross-sectional direction to the center of the wash chute in the cross-sectional direction is large, making it extremely difficult to attach the wash chute to the chute mounting members located in the center of the wash chute in the cross-sectional direction.

[0011] Therefore, the present invention has been made to solve this conventional problem, and its objective is to provide a conveyor frame, a wash chute, and a method for attaching a wash chute to a conveyor frame, which allows for easy installation of the wash chute from a pair of walkways installed on both sides of the width direction of the conveyor frame, even when the wash chute is installed after the conveyor frame has been installed on-site. [Means for solving the problem]

[0012] To solve the above problems, a conveyor frame according to one aspect of the present invention is a conveyor frame configured by combining a plurality of frame members in the longitudinal direction, supporting a conveyor belt for transporting raw materials, and having a pair of walkways installed on both outer sides in the width direction perpendicular to the longitudinal direction with respect to the frame members, and comprising a washing chute extending in the longitudinal direction for collecting powdery material in the raw materials that has fallen from the conveyor belt, wherein the washing chute is equipped with a reinforcing member for reinforcing the washing chute and is attached to a pair of chute support members provided at both ends of the conveyor frame in the width direction.

[0013] Furthermore, another aspect of the present invention relates to a washing chute that is provided on a conveyor frame, which is constructed by combining a plurality of frame members in the longitudinal direction, supports a conveyor belt that transports raw materials in the longitudinal direction, and has a pair of walkways installed on both outer sides in the width direction perpendicular to the longitudinal direction relative to the frame members, and is a washing chute that extends in the longitudinal direction for collecting powdery material in the raw materials that has fallen from the conveyor belt, and is provided with reinforcing members to reinforce the washing chute, and is attached to a pair of chute support members provided at both ends in the width direction of the conveyor frame.

[0014] Furthermore, another aspect of the present invention relates to a method for attaching a washing chute to a conveyor frame, which involves attaching the aforementioned washing chute to a pair of chute support members from a pair of walkways installed on both outer sides of the conveyor frame in the width direction. [Effects of the Invention]

[0015] According to the conveyor frame, water wash chute, and method for attaching the water wash chute to the conveyor frame of the present invention, even when the water wash chute is installed after the conveyor frame has been installed on-site, the work of attaching the water wash chute can be easily performed from a pair of walkways installed on both sides in the width direction of the conveyor frame. [Brief explanation of the drawing]

[0016] [Figure 1] It is a side view of a belt conveyor device provided with a conveyor frame according to an embodiment of the present invention. [Figure 2] It is a plan view of the belt conveyor device shown in FIG. 1. [Figure 3] It is a cross-sectional view taken along the line 3-3 in FIG. 1. [Figure 4] It is a side view of a part of the conveyor frame in FIG. 1. [Figure 5] The washing chute is shown, (a) is a plan view, (b) is a right side view of (a), and (c) is a front view (similar to the side view of FIG. 1). [Figure 6] It explains how the upstream washing chute member is overlapped with the downstream washing chute member to form the washing chute, (a) is a plan view, and (b) is a front view (similar to the side view of FIG. 1).

Embodiments for Carrying out the Invention

[0017] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments shown below exemplify devices and methods for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the materials, shapes, structures, arrangements, etc. of the components in the following embodiments.

[0018] Also, the drawings are schematic. Therefore, it should be noted that the relationship between the thickness and the planar dimensions, the ratio, etc. are different from the actual ones, and there are parts where the dimensional relationships and ratios are different between the drawings.

[0019] In FIG. 1, a belt conveyor device provided with a conveyor frame according to an embodiment of the present invention is shown. The belt conveyor device 1 shown in FIG. 1 conveys raw materials P (see FIG. 3) such as ore, coal, sintered ore, and coke, and includes a conveyor belt 10 for conveying the raw material P and a conveyor frame 20 for supporting the conveyor belt 10.

[0020] As shown in Figure 1, the conveyor belt 10 is stretched over a head pulley 11 located at the front end of the conveyor frame 20 in the longitudinal direction (same direction as the direction in which the conveyor belt 10 travels) and a tail pulley 12 located at the rear end of the conveyor frame 20 in the longitudinal direction, both of which extend diagonally upward (longitudinal direction) from the rear to the front, to convey the raw material P. As shown in Figure 1, the conveyor belt 10 travels diagonally upward from the rear to the front on the carrier side (upper side in Figure 1) 10C that conveys the raw material P, then turns back at the head pulley 11 and travels diagonally downward from the front to the rear on the return side (lower side in Figure 1) 10R.

[0021] The carrier side 10C of the conveyor belt 10 is supported from below by a plurality of carrier rollers 13, forming a concave shape with an upward opening, as shown in Figure 3. The carrier rollers 13 come in sets of three and are rotatably supported by a plurality of roller support members 15a, 15b on a carrier roller support plate 14 that spans between the left and right upper chord members 21 of the conveyor frame 20, which will be described later. The return side 10R of the conveyor belt 10 is supported from below by a plurality of return rollers 16, as shown in Figure 3. The return rollers 16 are rotatably supported by a pair of brackets 17 attached to the left and right upper chord members 21 of the conveyor frame 20, which will be described later.

[0022] Furthermore, the conveyor frame 20 is constructed by combining multiple frame members, including an upper chord 21, a lower chord 22, vertical members 23, diagonal braces 24, an upper horizontal member 25, a lower horizontal member 26, and diagonal members 28, in a truss-like manner that extends in the longitudinal direction. The conveyor frame 20 is supported by multiple support columns 2 at required locations in the longitudinal direction. In this embodiment, multiple frame members are combined in a truss-like manner to extend longitudinally, but the multiple frame members do not necessarily have to be combined in a truss-like manner. For example, the multiple frame members may be combined in other structures, such as a grid.

[0023] As shown in Figures 1 to 3, the upper chord members 21 of the conveyor frame 20 extend along the longitudinal direction on both the left and right sides of the conveyor belt 10, forming pairs on the left and right. Each upper chord member 21 is a steel member with an L-shaped cross-section, as shown in Figure 3. The lower chord members 22 extend along the longitudinal direction on both the left and right sides below the conveyor belt 10, forming pairs on the left and right. Each lower chord member 22 is a steel member with an L-shaped cross-section, as shown in Figure 3. The vertical members 23 connect the left upper chord member 21 to the left lower chord member 22, and the right upper chord member 21 to the right lower chord member 22, respectively, and are provided in multiples at predetermined intervals along the longitudinal direction of the conveyor frame 20. The bracing members 24 are provided in multiples for each of the left and right vertical members 23 that are adjacent to each other in the longitudinal direction, connecting the upper and lower ends of the vertical members 23. Furthermore, the upper horizontal members 25 connect the pairs of upper chord members 21 on the left and right sides, and are provided in multiples at predetermined intervals along the longitudinal direction of the conveyor frame 20, corresponding to the vertical members 23. Similarly, the lower horizontal members 26 connect the pairs of lower chord members 22 on the left and right sides, and are provided in multiples at predetermined intervals along the longitudinal direction of the conveyor frame 20, corresponding to the vertical members 23. In addition, multiple diagonal members 28 are provided and are stretched in a zigzag pattern between the upper chord members 21 on the left and right sides and between the lower chord members 22 on the left and right sides.

[0024] Furthermore, as shown in Figures 2, 3, and 4, the conveyor frame 20 is provided with a plurality of walkway support members 27 that extend in the width direction perpendicular to the longitudinal direction of the conveyor frame 20, below the return side 10R of the conveyor belt 10. Each walkway support member 27, as shown in Figure 4, is a steel member with an L-shaped cross-section and is fixed to the left and right vertical members 23 at predetermined intervals along the longitudinal direction of the conveyor frame 20. As shown in Figures 2 and 3, each walkway support member 27 extends outward on both sides in the width direction beyond the left and right vertical members 23 in the width direction of the conveyor frame 20. Then, as shown in Figures 2 and 3, a pair of walkways 40 are installed on both sides in the width direction beyond the left and right vertical members 23 that serve as frame members. The walkway 40 installed on one side (left side) in the width direction beyond the left and right vertical members 23 is supported by a portion of the walkway support member 27 that extends outward (left side) in the width direction beyond the left vertical member 23 in the width direction of the conveyor frame 20. Furthermore, the walkway 40, which is installed on the other outer side (right side) in the width direction relative to the left and right vertical members 23, is supported by a portion of a walkway support member 27 that extends outward (to the right) in the width direction of the conveyor frame 20 beyond each of the right vertical members 23. Workers can perform inspection work on the belt conveyor device 1, replacement work on the carrier rollers 13 and return rollers 16 (described later), and replacement work on the conveyor belt 10 from each walkway 40. In addition, as will be described later, workers can easily install the water wash chute 30 from each walkway 40.

[0025] Furthermore, the conveyor frame 20 is equipped with a washing chute 30 extending in the longitudinal direction of the conveyor frame for collecting powdery material in the raw material P that has fallen from the conveyor belt 10. Powdery material in the raw material P conveyed on the carrier side 10C of the conveyor belt 10 may fall not only from the carrier side 10C of the conveyor belt 10, but also from the return side 10B of the conveyor belt 10, and this fallen powdery material in the raw material P is collected by the washing chute 30. The powdery material in the raw material P collected by the washing chute 30 is then washed away with water sprayed from a washing device (not shown) and collected by a recovery device (not shown).

[0026] As shown in Figure 3, the washing chute 30 is equipped with reinforcing members 34a and 34b to reinforce the washing chute 30 and is attached to a pair of chute support members 29 provided at both ends in the width direction of the conveyor frame 20.

[0027] To explain in more detail, first, as shown in Figures 3 and 4, each chute support member 29 is an L-shaped steel member extending in the longitudinal direction of the conveyor frame 20, and a pair is provided at the left and right ends in the width direction of the conveyor frame 20. The chute support member 29 on the left end in the width direction of the conveyor frame 20 is welded to a plurality of walkway support members 27 fixed to each vertical member 23 on the left side at predetermined intervals along the longitudinal direction of the conveyor frame 20, inside each vertical member 23 on the left side. On the other hand, the chute support member 29 on the right end in the width direction of the conveyor frame 20 is welded to a plurality of walkway support members 27 inside each vertical member 23 on the right side.

[0028] As shown in Figures 4 and 6(b), multiple metal chute mounting brackets 36 are welded to the outer surface of the chute support member 29 on the left end in the width direction of the conveyor frame 20 at predetermined intervals along the longitudinal direction. Although not shown, multiple chute mounting brackets 36 are also welded to the outer surface of the chute support member 29 on the right end in the width direction of the conveyor frame 20 at positions corresponding to the chute mounting brackets 36 on the left side in the longitudinal direction. Each chute mounting bracket 36 has an elongated hole 37 for inserting a shaft through which the shaft of a mounting bolt (not shown) for attaching a water-washing chute member 31 (described later) to the chute support member 29 is inserted.

[0029] Furthermore, as shown in Figures 4 to 6, the washing chute 30 is formed by connecting a plurality of washing chute members 31, each equipped with reinforcing members 34a and 34b, in the longitudinal direction of the conveyor frame 20.

[0030] Each of the multiple washing chute members 31 is equipped with a rectangular bottom plate portion 32 for collecting powdery material from the raw material P that has fallen from the conveyor belt 10, and a pair of side plates 33 that rise from both ends of the bottom plate portion 32 in the same width direction as the conveyor frame 20 to prevent the collected powdery material from falling. This allows the powdery material from the raw material P that has fallen from the conveyor belt 10 to be collected by the bottom plate portion 32, and the pair of side plates 33 to prevent the collected powdery material from falling. Each washing chute member 31 is made of steel.

[0031] Here, when connecting multiple wash chute members 31 in the longitudinal direction of the conveyor frame 20, as shown in Figures 6(a) and (b), the upstream wash chute member 31 is placed on top of the downstream wash chute member 31 in the longitudinal direction by an overlap margin OL, and this operation is performed for all wash chute members 31 in the longitudinal direction. This is to prevent water leakage from between the upstream wash chute member 31 and the downstream wash chute member 31. To facilitate this overlapping operation of the upstream and downstream wash chute members 31, as shown in Figure 5(a), the width Dw of the downstream end of each wash chute member 31 is made slightly shorter than the width Uw of the upstream end. As a result, the width Dw of the downstream end of the upstream wash chute member 31 is shorter than the width Uw of the upstream end of the downstream wash chute member 31, allowing the two wash chute members 31 to be easily overlapped as shown in Figure 6(a).

[0032] Furthermore, when connecting multiple water-washing chute members 31 in the longitudinal direction of the conveyor frame 20, each water-washing chute member 31 must be inserted from above the walkway 40 between the vertical members 23 and the bracing members 24 that serve as frame members and placed on a pair of chute support members 29. For this reason, the longitudinal width of each water-washing chute member 31 is made smaller than the maximum width between the vertical members 23 and the bracing members 24.

[0033] As shown in Figures 5(a) and (c), the reinforcing members 34a and 34b consist of an upstream reinforcing member 34a and a downstream reinforcing member 34b. The upstream reinforcing member 34a is a flat plate that extends elongated in the width direction of the bottom plate 32 (vertical direction in Figure 5(a)) and is installed on the upstream side of the bottom surface of the bottom plate 32 in the longitudinal direction (left-right direction in Figure 5(a)). The downstream reinforcing member 34b is also a flat plate that extends elongated in the width direction of the bottom plate 32 and is installed on the downstream side of the bottom surface of the bottom plate 32 in the longitudinal direction. The installation distance UL of the upstream reinforcing member 34a from the upstream edge 32a of the bottom plate 32 is approximately equal to the overlap OL mentioned above. On the other hand, the installation distance DL of the downstream reinforcing member 34b from the downstream edge 32b of the bottom plate 32 is slightly larger than the overlap OL. As a result, when overlapping the upstream water chute member 31 with the downstream water chute member 31, the downstream reinforcing member 34b of the upstream water chute member 31 is guided to the upstream edge portion 32a of the downstream water chute member 31. Therefore, the overlapping operation of the upstream water chute member 31 with the downstream water chute member 31 becomes easier.

[0034] The upstream reinforcing member 34a and the downstream reinforcing member 34b reinforce the water chute member 31, preventing the water chute member 31 from bending in the width direction of the bottom plate 32, particularly in the vertical direction (left-right direction in Figure 5(c)), due to its own weight and external forces. By installing the upstream reinforcing member 34a and the downstream reinforcing member 34b on the lower surface of the bottom plate 32, it is possible to prevent the water chute member 31 from bending, particularly downwards. Furthermore, by constructing the upstream reinforcing member 34a and the downstream reinforcing member 34b as flat plates that extend elongated in the width direction of the bottom plate 32, it is possible to effectively prevent the water chute member 31 from bending in the width direction of the bottom plate 32. By preventing the upstream and downstream flush chute members 31 from bending in the width direction of the bottom plate 32, gaps are less likely to form between the upstream and downstream flush chute members 31, thus preventing water leakage from those gaps. Furthermore, by installing two reinforcing members, an upstream reinforcing member 34a and a downstream reinforcing member 34b, each flush chute member 31 can be reinforced with greater strength than when a single reinforcing member is installed.

[0035] In this embodiment, the upstream reinforcing member 34a and the downstream reinforcing member 34b have the same shape and dimensions. The height H (see Figure 5(b)), thickness t, and width Rw (see Figure 5(c)) of the bottom plate portion 32 of the upstream reinforcing member 34a and the downstream reinforcing member 34b from the lower surface are appropriately set to dimensions that are effective in preventing the water wash chute member 31 from bending in the width direction of the bottom plate portion 32 due to its own weight or external forces. The installation distance UL from the upstream edge 32a of the bottom plate portion 32 of the upstream reinforcing member 34a is set to approximately 50 mm, and the installation distance DL from the downstream edge 32b of the bottom plate portion 32 of the downstream reinforcing member 34b is set to approximately 70 mm.

[0036] Furthermore, in this embodiment, the overlap OL of the upstream water wash chute member 31 with respect to the downstream water wash chute member 31 is set to approximately 50 mm, the longitudinal width of the water wash chute member 31 is set to approximately 900 mm, the width Uw of the upstream end of the water wash chute member 31 is set to approximately 1560 mm, and the width Dw of the downstream end of the water wash chute member 31 is set to 1550 mm. Furthermore, each of the pair of side plate portions 33 has a shaft insertion hole 35 through which the shaft portion of a mounting bolt (not shown) for attaching the aforementioned water washing chute member 31 to the chute support member 29 is inserted.

[0037] Then, when attaching the washing chute 30 to the conveyor frame 20, the washing chute 30 is attached to a pair of chute support members 29 from a pair of walkways 40 installed on both outer sides in the width direction (left and right direction) of the conveyor frame 20. The method of attaching the washing chute 30 to the conveyor frame 20 will be described in detail below. When attaching the washing chute 30 to the conveyor frame 20, after the conveyor frame 20 has been installed on-site, the chute support member 29 on the left end in the width direction of the conveyor frame 20 is welded in advance onto a plurality of walkway support members 27 fixed to each of the left and right vertical members 23 at predetermined intervals along the longitudinal direction of the conveyor frame 20, inside each of the left vertical members 23. In addition, the chute support member 29 on the right end in the width direction of the conveyor frame 20 is welded in advance onto a plurality of walkway support members 27 inside each of the right vertical members 23.

[0038] Furthermore, multiple chute mounting brackets 36 are welded and fixed at predetermined intervals along the longitudinal direction to the outer surface of the chute support member 29 on the left end in the width direction of the conveyor frame 20. In addition, multiple chute mounting brackets 36 are welded and fixed to the outer surface of the chute support member 29 on the right end in the width direction of the conveyor frame 20 at positions corresponding to the chute mounting brackets 36 on the left side in the longitudinal direction.

[0039] Then, the downstream water chute member 31 is inserted between the vertical member 23 and the bracing member 24 from the walkway 40 located on the left or right outer side in the width direction of the conveyor frame 20, and placed on a pair of chute support members 29 in the width direction. As a result, as shown in Figure 6(b), the shaft insertion holes 35 formed in the pair of side plate portions 33 of the water chute member 31 and the elongated shaft insertion holes 37 formed in the pair of chute mounting brackets 36 are aligned.

[0040] Next, the water wash chute member 31 is attached to a pair of chute mounting brackets 36 from each of the pair of walkways 40 located on the left and right outer sides in the width direction of the conveyor frame 20 using mounting bolts (not shown) and nuts (not shown). When attaching the water wash chute member 31 to the chute mounting brackets 36, the shaft portion of the mounting bolt (not shown) is inserted through the elongated hole 37 for shaft insertion in the chute mounting bracket 36 and then through the shaft insertion hole 35 in the water wash chute member 31, and then fastened together with a nut (not shown). In this way, the water wash chute member 31 on the downstream side is attached to a pair of chute support members 29.

[0041] Next, the upstream flush chute member 31, which is longitudinally adjacent to the downstream flush chute member 31, is inserted between the vertical member 23 and the bracing member 24 from the walkway 40 located on the left or right outer side in the width direction of the conveyor frame 20. The upstream flush chute member 31 is then placed on top of the downstream flush chute member 31 by overlapping margin OL, and the upstream flush chute member 31 is placed on a pair of chute support members 29 in the width direction. As a result, the shaft insertion holes 35 formed in the pair of side plate portions 33 of the upstream flush chute member 31 and the elongated shaft insertion holes 37 formed in the pair of chute mounting brackets 36 are aligned.

[0042] Subsequently, in the same manner as described above, the water wash chute member 31 is attached to a pair of chute mounting brackets 36 from each of the pair of walkways 40 located on the left and right outer sides in the width direction of the conveyor frame 20 using mounting bolts (not shown) and nuts (not shown). This connects the downstream water wash chute member 31 and the upstream water wash chute member 31, and the upstream water wash chute member 31 is attached to a pair of chute support members 29.

[0043] Then, the process of overlapping and connecting the downstream and upstream wash chute members 31 as described above and attaching them to the pair of chute support members 29 is performed for all wash chute members 31 in the longitudinal direction. This attaches the wash chute 30 to the conveyor frame 20. Thus, according to the conveyor frame 20, the washing chute 30, and the method of attaching the washing chute 30 to the conveyor frame 20 according to the embodiment of the present invention, the washing chute 30 is equipped with reinforcing members 34a and 34b that reinforce the washing chute 30, and is attached to a pair of chute support members 29 provided at both ends in the width direction of the conveyor frame 20.

[0044] This makes it easy to install the wash chute 30 from a pair of walkways 40 installed on both sides of the conveyor frame 20 in the width direction, even when the wash chute 30 is installed after the conveyor frame 20 has been installed on site. Here, since the wash chute 30 is equipped with reinforcing members 34a and 34b that reinforce the wash chute 30, it is possible to prevent the wash chute 30 from bending in the width direction of the conveyor frame 20 due to its own weight or external forces. For this reason, it is not necessary to support the wash chute 30 in the central part of the width direction, far from the pair of walkways 40 installed on both sides of the width direction of the conveyor frame 20.

[0045] In addition, as an embodiment different from that of the present invention, a method for installing the wash chute 30 while preventing deflection after the conveyor frame 20 has been installed on-site could be considered in which the reinforcing members 34a and 34b are attached to the wash chute 30 by first attaching it to a pair of chute support members 29 and then stretching the reinforcing members 34a and 34b between the pair of chute support members 29, or in which a chute support member 29 extending along the entire width direction is attached to the conveyor frame 20 and then the wash chute 30 without the reinforcing members 34a and 34b is attached to the chute support member 29. However, in these methods, it is necessary to stretch the reinforcing members 34a and 34b between a pair of support members 29 by weaving them between a plurality of frame members configured in a truss shape, or to attach the chute support member 29 extending along the entire width direction to the conveyor frame 20, which is not easy to do on-site and does not make it easy to install the wash chute 30 from above the walkway 40.

[0046] In contrast, in the above-described embodiment of the present invention, the water wash chute 30 is configured to include reinforcing members 34a and 34b, and the reinforcing members 34a and 34b can be attached to the underside of the water wash chute 30 in advance at a location that is easy to work with, prior to on-site work, thereby reducing the amount of on-site work and making it easier to install the water wash chute 30 from above the walkway 40.

[0047] Furthermore, according to the conveyor frame 20 and washing chute 30 of the present invention, the washing chute 30 is formed by connecting a plurality of washing chute members 31, each having reinforcing members 34a and 34b, in the longitudinal direction of the conveyor frame 20.

[0048] As a result, when attaching the wash chute 30 to the pair of chute support members 29, each wash chute member 31 in the longitudinal direction can be inserted between the vertical members 23 and the bracing members 24, which are frame members, from above the pair of walkways 40 and attached to the pair of chute support members 29, so that the work of attaching the wash chute 30 to the pair of chute support members 29 can be easily performed from above the pair of walkways 40. At this time, each wash chute member 31 is equipped with reinforcing members 34a and 34b that reinforce the wash chute 30, so that each wash chute member 31 can be prevented from bending in the width direction of the conveyor frame 20 due to its own weight or external force. As a result, it is less likely that a gap will occur between the upstream wash chute member 31 and the downstream wash chute member 31 in the longitudinal direction, and water leakage from such a gap can be prevented.

[0049] Furthermore, according to the conveyor frame 20 and washing chute 30 according to the embodiment of the present invention, each of the plurality of washing chute members 31 includes a rectangular bottom plate portion 32 for collecting powdery material in the raw material P that has fallen from the conveyor belt 10, and a pair of side plate portions 33 that rise from both ends of the bottom plate portion 32 in the same width direction as the width direction of the conveyor frame 20 to prevent the collected powdery material from falling.

[0050] As a result, the bottom plate 32 collects the powdery material P that has fallen from the conveyor belt 10, and the pair of side plates 33 prevent the collected powder from falling. Therefore, the powder collected from the washing chute 30 does not fall, and almost all of it can be washed with water and collected in another collection device.

[0051] Furthermore, according to the conveyor frame 20 and washing chute 30 according to the embodiment of the present invention, the reinforcing members 34a and 34b are composed of flat plates that extend elongated in the width direction of the bottom plate portion 32 and are installed on the lower surface of the bottom plate portion 32. By installing the reinforcing members 34a and 34b on the lower surface of the bottom plate portion 32, it is possible to prevent the washing chute member 31 from bending, especially downwards, of the bottom plate portion 32. In addition, by composing the reinforcing members 34a and 34b as flat plates that extend elongated in the width direction of the bottom plate portion 32, it is possible to effectively prevent the washing chute member 31 from bending in the width direction of the bottom plate portion 32.

[0052] Although embodiments of the present invention have been described above, the present invention is not limited thereto and can be modified and improved in various ways. For example, the washing chute 30 does not necessarily have to consist of multiple washing chute members 31 connected in the longitudinal direction of the conveyor frame 20.

[0053] Furthermore, each water chute member 31 does not necessarily need to be composed of a bottom plate portion 32 and a pair of side plate portions 33.

[0054] Furthermore, the reinforcing member does not necessarily have to consist of two reinforcing members, an upstream reinforcing member 34a and a downstream reinforcing member 34b in the longitudinal direction; it may consist of one or three or more. For example, one reinforcing member may be provided in the middle of the longitudinal direction of the bottom plate portion 32. Also, the reinforcing members 34a and 34b do not necessarily have to be made of flat plates that extend elongated in the width direction of the bottom plate portion 32. In addition, the reinforcing members 34a and 34b do not necessarily have to be installed on the lower surface of the bottom plate portion 32; they may be installed on the upper surface of the bottom plate portion 32. [Explanation of symbols]

[0055] 1. Belt conveyor device 10 Conveyor belt 10C Carrier side 10R Return side 11 Head Pulley 12 Tail Pulley 13 Carrier Roller 14. Carrier roller support plate 15a, 15b Roller support members 16 Return Roller 17 Bracket 20 Conveyor Frames 21 Upper chord member (frame member) 22 Lower chord member (frame member) 23 Vertical members (frame members) 24. Bracing (frame members) 25 Upper horizontal member (frame member) 26 Lower horizontal member (frame member) 27. Walkway support material 28. Diagonal bracing (frame members) 29. Chute support member 30 Water flush chutes 31 Water washing chute component 32 Bottom plate part 33 Side plate part 34a Upstream reinforcing member (reinforcing member) 34b Downstream reinforcing member (reinforcing member) 35 Hole for inserting shaft 36. Shoot mounting bracket 37 Slot for inserting the shaft 40 corridors P raw material

Claims

1. A conveyor frame comprising multiple frame members combined in the longitudinal direction, supporting a conveyor belt for transporting raw materials, and having a pair of walkways installed on both outer sides in the width direction perpendicular to the longitudinal direction relative to the frame members, wherein the conveyor frame is equipped with a water washing chute extending in the longitudinal direction for collecting powdery material from the raw materials that has fallen from the conveyor belt, The conveyor frame is characterized in that the wash chute is provided with a reinforcing member to reinforce the wash chute and is attached to a pair of chute support members provided at both ends of the conveyor frame in the width direction.

2. The conveyor frame according to claim 1, characterized in that the washing chute is formed by connecting a plurality of washing chute members, each equipped with the reinforcing member, in the longitudinal direction of the conveyor frame.

3. The conveyor frame according to claim 2, characterized in that each of the plurality of washing chute members comprises a rectangular bottom plate portion for collecting powdery material from the raw material that has fallen from the conveyor belt, and a pair of side plate portions that rise from both ends of the bottom plate portion in the same width direction as the width direction of the conveyor frame to prevent the collected powdery material from falling.

4. The conveyor frame according to claim 3, characterized in that the reinforcing member is a flat plate that extends elongated in the width direction of the bottom plate and is installed on the lower surface of the bottom plate.

5. A conveyor frame is provided with a water washing chute that extends in the longitudinal direction for collecting powdery material from the raw material that has fallen from the conveyor belt, the conveyor belt being constructed by combining multiple frame members in the longitudinal direction and supporting a conveyor belt that transports raw materials in the longitudinal direction, and a pair of walkways being installed on both outer sides in the width direction perpendicular to the longitudinal direction relative to the frame members, the water washing chute being installed in the longitudinal direction A wash chute is characterized by being equipped with reinforcing members to reinforce the wash chute and being attached to a pair of chute support members provided at both ends in the width direction of the conveyor frame.

6. The wash chute according to claim 5, characterized in that a plurality of wash chute members, each having the reinforcing member, are connected in the longitudinal direction of the conveyor frame.

7. The washing chute according to claim 6, characterized in that each of the plurality of washing chute members comprises a rectangular bottom plate portion for collecting powdery material from the raw material that has fallen from the conveyor belt, and a pair of side plate portions that rise from both ends of the bottom plate portion in the same width direction as the width direction of the conveyor frame, for preventing the collected powdery material from falling.

8. The water chute according to claim 7, characterized in that the reinforcing member is a flat plate that extends elongated in the width direction of the bottom plate and is installed on the lower surface of the bottom plate.

9. A method for attaching a wash chute to a conveyor frame, characterized in that the wash chute described in any one of claims 5 to 8 is attached to the pair of chute support members from the pair of walkways installed on both outer sides of the conveyor frame in the width direction.

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