Vibration feeder

Abstract

To provide a vibration feeder capable of suppressing clogging of a powder and granular material and breaking of the powder and granular material beyond a weir plate to the outside of a trough on a downstream side of the trough.SOLUTION: A vibration feeder having a trough on which a powder and granular material is loaded and which is provided at an inclination so that a conveyance direction of the powder and granular material is lowered, and a vibration device that vibrates the trough. The width of the trough on a downstream side in the conveyance direction is made wider than the width on an upstream side.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibrating feeder that can suppress clogging and breakage of powder and granular material. [Background technology]

[0002] Granular materials such as iron ore and coal are transported from a hopper or other powder supply device to a processing device such as a kneader or sintering machine via a belt conveyor or the like for processing. To load the powder from the powder supply device onto a belt conveyor or the like, a vibrating feeder is used, which applies vibrations to the powder to transport it. This vibrating feeder transports the powder loaded on a trough by vibrating a trough that is tilted downward in the conveying direction. Electromagnetic vibration or electric motor-driven vibrators are often used as the vibrating device.

[0003] Furthermore, by controlling the vibration of the trough, the vibrating feeder can control the amount and speed of powder and granular material being conveyed, and can handle a wide range of powder and granular materials, such as aggregates and soil and sand, in addition to the iron ore and coal mentioned above.

[0004] As a technology related to a vibrating feeder, Patent Document 1 discloses a vibrating feeder in which a slit is provided in the bottom plate of the trough so that the opening can be freely adjusted. According to Patent Document 1, by providing the slit, it is possible to convey the objects to the belt conveyor while changing the thickness of the objects loaded on the belt conveyor.

[0005] In addition, Patent Document 2 discloses a method in which two vibrating feeders are arranged in series, and the width of the trough of the downstream vibrating feeder is larger than the width of the trough of the upstream vibrating feeder. narrow According to Patent Document 2, a vibrating feeder is disclosed that can feed flat parts in small amounts. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Utility Model Application Publication No. 64-024026 [Patent Document 2] Japanese Patent Application Publication No. 2019-035601 Summary of the Invention [Problem to be solved by the invention]

[0007] The vibrating feeders disclosed in Patent Documents 1 and 2 have a constant trough width per unit or a narrower width toward the downstream side. Therefore, when powder or granular material is fed to the conveying feeder at a conveying capacity close to its maximum, the powder or granular material is easily pushed toward the downstream side of the trough and agglomerates. This agglomeration of powder or granular material reduces the conveyability of the powder or granular material, causing clogging or the powder or granular material to overflow the dam plate and break out of the trough. The present invention was made in consideration of these problems, and its purpose is to provide a vibrating feeder that can prevent clogging of powder or granular material downstream of the trough and prevent the powder or granular material from overflowing the dam plate and breaking out of the trough. [Means for solving the problem]

[0008] The means for solving the above problems are as follows. [1] A vibrating feeder having a trough on which powder or granular material is loaded and which is inclined so that the powder or granular material is lowered in the conveying direction, and a vibrating device which vibrates the trough, wherein the width of the trough on the downstream side in the conveying direction per vibrating feeder is wider than the width of the trough on the upstream side in the conveying direction. [2] The vibrating feeder described in [1], wherein the trough has two or more bottom plates in the conveying direction, and the downstream of the two or more bottom plates in the conveying direction is arranged to be movable in a direction to widen the width of the trough. [3] The vibrating feeder described in [1], wherein the trough has two or more bottom plates in the conveying direction, and the downstream sides of the two or more bottom plates in the conveying direction are rotatable in a direction to widen the width of the trough, with the upstream sides in the conveying direction as support axes. [Effects of the Invention]

[0009] The trough of the vibratory feeder according to the present invention is wider on the downstream side than on the upstream side per vibratory feeder, which prevents the powder and granular material from being pushed downstream and inhibits the powder and granular material from clogging the trough downstream or breaking up outside the trough by overflowing the barrier plate. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram showing a conventional vibrating feeder. [Figure 2] FIG. 2 is a schematic diagram showing an example of a vibrating feeder according to this embodiment. [Figure 3] FIG. 3 is a schematic diagram showing another example of the vibrating feeder according to the present embodiment. [Figure 4] FIG. 4 is a top view of a trough showing another example of the vibrating feeder according to this embodiment. [Figure 5] FIG. 5 is a top view of the trough of the vibrating feeder used in the examples. DETAILED DESCRIPTION OF THE INVENTION

[0011] The present invention will be described below through embodiments, which are preferred examples of the present invention.

[0012] Fig. 1 is a schematic diagram showing a conventional vibrating feeder 10. Fig. 1(a) is a side view of the vibrating feeder 10, and Fig. 1(b) is a top view of a trough 12. First, the configuration of the conventional vibrating feeder 10 will be described using Fig. 1.

[0013] The vibrating feeder 10 has a trough 12 and a vibrating device 14. As shown in Fig. 1(b), the trough 12 has a bottom plate 20 and three dam plates 22 provided on the upstream side and on both sides of the bottom plate 20 in the width direction, along three sides thereof. The trough 12 is inclined, for example, by 10° with respect to the horizontal direction so that the downstream side in the conveying direction is lower.

[0014] The vibrating device 14 is, for example, an electromagnetic vibrating type or an electrically driven type. The vibrating device 14 vibrates the trough 12. Due to the vibration of the vibrating device 14, the powder and granular material loaded on the trough 12 is transported to the downstream side of the trough 12. The vibrating device 14 and the trough 12 may be installed by being suspended by a suspender 16. Alternatively, the vibrating device 14 and the trough 12 may be mounted on a stand.

[0015] In conventional vibratory feeders 10, the width of the trough 12 per unit is constant or narrows toward the downstream side, so when powder or granular material is supplied to the vibratory feeder 10 at a level close to the maximum of its conveying capacity, the powder or granular material is pushed downstream and clumps together, reducing the conveyability of the powder or granular material. This reduction in conveyability can cause the powder or granular material to clog on the downstream side of the trough 12 or the powder or granular material to overflow the dam plate 22 and break out of the trough 12.

[0016] 2A and 2B are schematic diagrams showing an example of a vibrating feeder 30 according to the present invention. Fig. 2A is a side view of the vibrating feeder 30, and Fig. 2B is a top view of the upper trough 34 and the lower trough 42.

[0017] The upper trough 34 has a bottom plate 50 and three weir plates 52 provided on one upstream side and two widthwise sides of the bottom plate 50. The upper trough 34 is inclined, for example, at an angle of 10° with respect to the horizontal direction so that the downstream side in the conveying direction is lower.

[0018] The lower trough 42 has a bottom plate 54 that is wider than the bottom plate 50 of the upper trough 34, and three weir plates 56 provided on one upstream side of the bottom plate 54 and two opposite sides in the width direction. The lower trough 42 is also inclined, for example, at an angle of 10° with respect to the horizontal so that the downstream side in the conveying direction is lower. The vibration device 36 vibrates the upper trough 34 and the lower trough 42. Due to the vibration of the vibration device 36, the powder and granular material loaded on the upper trough 34 and the lower trough 42 is conveyed downstream.

[0019] The downstream end of the upper trough 34 and the upstream end of the lower trough 42 are arranged to overlap in the vertical direction. The vibrating device 36, the upper trough 34, and the lower trough 42 may be installed by being suspended by a suspension tool 38, or may be placed on a stand.

[0020] The maximum amount of powder and granular material conveyed by a vibrating feeder increases as the trough area increases and decreases as the trough area decreases. In the vibrating feeder 30 according to this embodiment, the troughs per vibrating feeder include an upper trough 34 and a lower trough 42. The width of the downstream lower trough 42 is wider than the width of the upstream upper trough 34, so the maximum amount of powder and granular material conveyed is greater in the downstream lower trough 42 than in the upstream upper trough 34. As a result, even if the maximum amount of powder and granular material is supplied to the upper trough 34, the maximum amount of powder and granular material conveyed is greater in the lower trough 42 than in the upper trough 34. This prevents the powder and granular material from being pushed into the lower trough 42 and from agglomerating. As a result, clogging of the powder and granular material downstream of the trough and the powder and granular material from being broken up and falling outside the lower trough 42 due to overflowing the dam plate 56 are prevented.

[0021] The trough may be configured as a single trough, in which case the width of the trough may be gradually increased toward the downstream in the conveying direction, or the width of the trough may be increased partway through.

[0022] Figure 3 is a schematic diagram showing another example of a vibrating feeder according to this embodiment. Figure 3(a) is a side view of a vibrating feeder 60. Figures 3(b) and 3(c) are top views of the upper trough 34 and the lower trough 72, with Figure 3(b) showing a state in which the width of the lower trough 72 is the same as that of the upper trough 34, and Figure 3(c) showing a state in which the width of the lower trough 72 has been increased. In Figure 3, the same components as those in Figure 2 are designated by the same reference numerals, and their description will be omitted.

[0023] The lower trough 72 of the vibrating feeder 60 has two fan-shaped bottom plates 80a and 80b, a support shaft 76 that rotatably supports them, weir plates 82a and 82b provided at two sides of the lower trough 72, and a drive unit 78 that rotates the bottom plates 80a and 80b around the support shaft 76. The drive unit 78 is, for example, a motor.

[0024] The lower trough 72 is inclined, for example, at an angle of 10° with respect to the horizontal direction so that the downstream side in the conveying direction is lower. The vibration device 36 vibrates the upper trough 34 and the lower trough 72. By the vibration of the vibration device 36, the powder and granular material loaded on the upper trough 34 and the lower trough 72 is conveyed to the downstream side of the lower trough 72.

[0025] The drive unit 78 rotates the two bottom plates 80a, 80b around the support shaft 76. The drive unit 78 rotates the bottom plates 80a, 80b, for example, by 13°, each in a direction in which the width of the lower trough 72 increases. This rotation increases the width of the lower trough 72, changing it from the conventional state shown in FIG. 3(b), in which the width of the lower trough 72 is the same as the width of the upper trough 34, to the state shown in FIG. 3(c), in which the width of the lower trough 72 is wider than the width of the upper trough 34. In this way, the width-increasing mechanism that increases the width of the lower trough 72 is composed of the two fan-shaped bottom plates 80a, 80b and the drive unit 78. In addition, portions of the weir plates 82a and 82b may be made movable downward to avoid collision between the weir plate 52 of the upper trough 34 and the weir plates 82a and 82b of the lower trough 72 when the bottom plates 80a and 80b are rotated.

[0026] By widening the width of the lower trough 72, the area of the lower trough 72 is increased. As described above, the maximum conveying amount of the vibrating feeder increases as the trough area increases, and therefore, when the area of the lower trough 72 is expanded, the maximum conveying amount of powder and granular material in the lower trough 72 becomes greater than the maximum conveying amount in the upper trough 34. As a result, even if the maximum conveying amount of powder and granular material is supplied to the upper trough 34, the maximum conveying amount of powder and granular material is greater in the lower trough 72 than in the upper trough 34, so the powder and granular material is prevented from being pushed into the lower trough 72, and aggregation of the powder and granular material is prevented. As a result, clogging of the powder and granular material and the powder and granular material being broken down and spilled out of the lower trough 72 are prevented.

[0027] Furthermore, the width of the downstream end of the vibrating feeder must correspond to the width of the belt conveyor to which it is being transported. For example, if the width of the downstream end of the transport feeder is significantly narrower than the width of the belt conveyor, the amount of material supplied from the transport feeder will be less than the amount of material transported by the belt conveyor, reducing the transport efficiency of the belt conveyor. On the other hand, if the width of the downstream end of the transport feeder is wider than the width of the belt conveyor, the powder and granular material will be broken off by the belt conveyor. The vibrating feeder 60 according to this embodiment can change the width of the downstream end of the lower trough 72, making it a highly versatile vibrating feeder that can accommodate belt conveyors of various widths.

[0028] In the vibrating feeder 60 shown in FIG. 3, the lower trough 72 has two bottom plates 80a, 80b, and the bottom plates 80a, 80b are rotated by 13° each, but this is not limiting. The lower trough 72 may have two or more bottom plates, and at least one of the bottom plates may be rotated in a direction that increases the width of the lower trough 72. Furthermore, in the vibrating feeder 60 shown in FIG. 3, the width of the lower trough 72 is increased by rotating the bottom plates 80a, 80b about the support shaft 76, but this is not limiting. For example, the bottom plates 80a, 80b may be provided so as to be movable in the width direction of the lower trough 72, and the width of the lower trough 72 may be increased by moving the bottom plates 80a, 80b in the direction that increases the width of the lower trough 72.

[0029] Fig. 4 is a top view of a trough showing another example of the vibrating feeder 60 according to this embodiment. As shown in Fig. 4, the trough may be configured to be widened from a position where the downstream side is longer than the upstream side with respect to the total length of the trough (total length of the trough including the upper trough 35 and the lower trough 73) by using the upper trough 35 and the lower trough 73. For example, the downstream side may be 4 / 5 of the total length of the trough. This makes it possible to create a vibrating feeder that can convey even viscous powder and granular material with low conveyability while suppressing clogging and breakage of the powder and granular material.

[0030] In a conveying feeder, powder and granular materials are likely to become clogged or broken on the downstream side of the trough, so the range of the downstream side of the trough where the width is widened should be at least 1 / 4 of the total length of the trough. The range of the downstream side of the trough where the width is widened is preferably at least 1 / 2 of the total length of the trough, and more preferably at least 3 / 4. The above-mentioned upper and lower troughs are provided per vibrating feeder. This allows powder and granular materials to be transported efficiently with a single vibrating device, reduces operating costs, and makes vibrating feeder installation easier. [Example]

[0031] Next, an example in which coal was transported using the vibrating feeder according to this embodiment will be described. Figure 5 is a top view of the trough of the vibrating feeder used in the example. Figure 5(a) is a top view of the trough of a conventional vibrating feeder 10 (see Figure 1(a)) used as a comparative example, and Figure 5(b) is a top view of the trough of a vibrating feeder 60 according to the present invention (see Figure 3(a)).

[0032] Vibrating feeder 10 having a trough with the dimensions shown in Figure 5(a) and vibrating feeder 60 having a trough with the dimensions shown in Figure 5(b) were installed at the outlet of a coal hopper, and these vibrating feeders were used to transport coal to a belt conveyor with a width of 600 mm. The maximum coal transport rate of vibrating feeder 10 and vibrating feeder 60 is approximately 26 tons / hr.

[0033] Using a conventional vibrating feeder 10, coal was supplied at or near the maximum conveying rate of 24.7 to 26.3 tons / hr and conveyed to a belt conveyor. As a result, eight hours after the start of conveyance, a blockage occurred downstream of the vibrating feeder 10, and the coal exceeded the barrier plate 22 and broke, resulting in the suspension of coal conveyance.

[0034] The vibrating feeder 60 according to the present invention rotated the two bottom plates 80a, 80b by 13° each in a direction that increased the width, and supplied coal at the maximum conveying rate or a rate close to this rate of 24.7 to 26.3 tons / hr to the belt conveyor in a state in which the lower trough 72 was widened. As a result, coal from the hopper could be conveyed to the belt conveyor 24 hours continuously without clogging or breaking of the coal.

[0035] In the vibrating feeder 60 according to the present invention, the two bottom plates are each rotated by 13° to widen the lower trough 72, so the area of the lower trough 72 is 0.32 m 2 From 0.37m 2 As a result, the maximum conveyance amount of the lower trough 72 increased from approximately 26 tons / hr to approximately 30 tons / hr, and as a result, it is thought that coal clogging did not occur downstream of the vibrating feeder 60 and that the coal was prevented from exceeding the weir plates 52, 82a, and 82b and starting to break down. [Explanation of symbols]

[0036] 10 Conventional vibratory feeder 12 Trough 14 Vibration device 16 Hanging device 20 Bottom plate 22 Weir plate 30 Vibration feeder of the present invention 34 Upper Trough 35 Upper Trough 36 Vibration device 38 Hanging Device 42 Lower Trough 50 Bottom plate 52 Weir plate 54 Bottom plate 56 Weir plate 60 Vibration feeder of the present invention 68 Hanging Device 72 Lower Trough 73 Lower Trough 76 Spindle 78 Lower trough drive unit 80a bottom plate 80b bottom plate 82a Weir board 82b Weir board

Claims

1. A vibrating feeder having a trough on which powder or granular material is loaded and which is inclined so that a direction in which the powder or granular material is conveyed is lower, and a vibrating device which vibrates the trough, For each vibrating feeder, the width of the trough on the downstream side in the conveying direction is wider than the width of the trough on the upstream side in the conveying direction, The trough has two or more bottom plates in the conveying direction, and downstream of the two or more bottom plates in the conveying direction are provided so as to be movable in a direction to increase the width of the trough.

2. A vibrating feeder having a trough on which powder or granular material is loaded and which is inclined so that the powder or granular material is conveyed downward, and a vibrating device which vibrates the trough, For each vibrating feeder, the width of the trough on the downstream side in the conveying direction is wider than the width of the trough on the upstream side in the conveying direction, A vibrating feeder in which the trough has two or more bottom plates in the conveying direction, and the downstream sides of the two or more bottom plates in the conveying direction are rotatable in a direction to expand the width of the trough, with the upstream sides in the conveying direction as support axes.

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