JP2004067269A - Feeder device for small lump material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a feeder device for small lump materials, which can stably cut out a specified quantity of small lump materials with simple structure. <P>SOLUTION: This device is provided with a rotary drum 4 having eight partitioned rooms 5 and a chute 3 for supplying small lump materials to the partitioned rooms 5 from a hopper 2. The chute 3 comprises chutes 3a, 3b and 3c, which are arranged one over another alternately in the vertical direction, and a supply passage bent in a vertical direction are formed by the chutes 3a, 3b and 3c. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a feeder device for cutting out a predetermined amount of small lumps stored in a hopper or the like.
[0002]
[Prior art]
Conventionally, as a feeder device for cutting out a predetermined amount of small lumps stored in a hopper or the like, an opening / closing damper is provided at a lower portion of a hopper, and the opening degree of the damper is adjusted so as to output a predetermined amount. In some cases, an electromagnetic feeder is attached to the apparatus, and the amplitude of the electromagnetic feeder is adjusted so that a predetermined discharge flow rate is obtained.
[0003]
[Problems to be solved by the invention]
However, in the case where the opening / closing damper is provided at the lower part of the hopper, if the opening degree of the damper is not more than three times that of the small lump, the lump may be clogged in the damper portion, and the quantitative property is lacking. . The problem is solved by increasing the opening degree of the damper, but it is difficult to adjust the flow rate to a small value, and once the outflow starts, the momentum is so strong that it is difficult to stop the outflow. Even if the force of the damper is increased, the damper may not be able to be closed if a small lump is caught due to bad timing.
[0004]
In the case where an electromagnetic feeder is attached below the hopper, it is easy to discharge at a constant flow rate or to stop the discharge halfway, but if the particle size distribution of small lumps varies, the discharge flow rate also varies. Occurs. Therefore, in order to accurately measure the discharge weight, as shown in FIG. 3, a small lump discharged from the electromagnetic feeder 10 attached below the hopper 2 is temporarily transferred to the secondary storage hopper 11 having the load cell 14. It is necessary to tentatively measure the weight. In this case, when the opening / closing damper 12 is opened by the cylinder 13 and the small lump stored in the secondary storage hopper 11 is discharged, another electromagnetic feeder 15 is used, resulting in an expensive apparatus.
[0005]
On the other hand, as a feeder device for cutting out a predetermined amount of the granular material, a rotating body having a plurality of partitioning chambers is provided in the casing, and the granular material charged into the partitioning chamber is removed from the partitioning chamber with the rotation of the rotating body. Although a rotary feeder for discharging is used, if the rotary feeder is used as it is for a small lump, there is a risk that the small lump will bite between the casing and the rotating body and the rotating body will not be able to rotate.
[0006]
The present invention has been made in order to solve the above-described problem, and has as its object to provide a small lump feeder device capable of stably cutting out a predetermined amount of small lump with a simple structure. Things.
[0007]
[Means for Solving the Problems]
The small lump feeder device of the present invention is a feeder device for cutting out a predetermined amount of small lump stored in a hopper, and is provided in a casing and radially attached to a rotating shaft extending in a horizontal direction. A rotary drum partitioned by a partition plate into a plurality of partitioning chambers, and a chute forming a supply passage for supplying a small lump from the hopper to the partitioning chamber, wherein the supply passage has a slant angle of a small lump. A passage that is larger than the friction angle of the object, the height of the passage is twice as large as the size of the small lump, and is a vertically bent passage, and the position at which the small lump is supplied from the supply passage to the partition chamber is the rotation position. Between the uppermost position of the rotary drum along the rotation direction above the same height position as the shaft, and between the casing and the rotary drum along the rotation direction from the uppermost position of the rotary drum. The gap is small And it is characterized in that is larger than the maximum dimension of the object.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
One embodiment of the present invention is shown in FIG. FIG. 1A is a side sectional view, and FIG. 1B is a front view.
[0009]
In FIG. 1, the small lump feeder device according to the embodiment is radially mounted on a rotating shaft 4 a that is housed in a casing 6 and extends horizontally in a lower portion of a lower thin storage hopper 2 that stores the small lump 1. The rotary drum 4 having an eight-cell partition chamber 5 formed by the attached partition plate 4b, and the chute 3 forming a supply passage for supplying the small lump 1 from the hopper 2 to the partition chamber 5 are provided. The small lump 1 stored in the storage hopper 2 is supplied to the partition chamber 5 through a supply passage formed by the chute 3, and the partition chamber 5 is rotated by the rotation of the rotary drum 4 by the electric motor 7. Is supplied from the discharge port 9 at the lower portion of the casing 6.
[0010]
In the small lump feeder device according to the embodiment, the chutes 3 forming the supply passage for supplying the small lump 1 are chutes 3a, 3b, 3c arranged alternately in three stages in the vertical direction. And a supply passage bent in the vertical direction is formed by the chutes 3a, 3b, and 3c.
[0011]
By making the supply passage bent in the vertical direction in this way, the weight of the small lump 1 in the storage hopper 2 is received by the chutes 3a, 3b, and 3c of each stage, and an excessive load is not applied to the rotary drum 4. The rotation of the rotating drum 4 can be stabilized.
[0012]
When viewed from above and below, the chute 3a, 3b, 3c of each stage is arranged so that the tip of the chute 3a and the tip of the chute 3b overlap, and the tip of the chute 3b and the tip of the chute 3c overlap. For example, the weight of the small lump 1 in the storage hopper 2 is received by the chutes 3a, 3b, and 3c, so that the load on the rotary drum 4 is reduced.
[0013]
The inclination angles of the chutes 3a, 3b, 3c are larger than the friction angle of the small lump 1, and a gap in the height direction of the supply passage formed by the chutes 3a, 3b and the chutes 3b, 3c The gaps in the height direction of the supply passages formed by the above are each twice or more the size of the small lump 1.
[0014]
This allows the small lump 1 to smoothly flow through the supply passage formed by the chutes 3a, 3b, and 3c without causing clogging.
[0015]
The gap in the height direction of the supply passage formed by the chutes 3a, 3b, and 3c is preferably two to three times the size of the small lump 1, since the space is wasted if the gap is too large.
[0016]
The position at which the small lump 1 is supplied from the supply passage to the partition chamber 5 is located above the same height position as the rotary shaft 4a and above the rotary drum 4 along the rotation direction thereof. It is in the range between.
[0017]
In other words, the height position of the tip of the chute 3c is located above the height position of the rotating shaft 4a, and the tip position of the chute 3b is such that the small lump 1 flowing out of the chute 3b at an angle of repose rotates. The drum 4 is arranged at a position so as not to exceed the uppermost portion.
[0018]
Since the height position of the tip of the chute 3c is located above the height position of the rotary shaft 4a, when the small lump 1 enters the partition chamber 5, the rotary drum 4 and the casing 6 And the rotation of the rotary drum 4 does not stop.
[0019]
Further, since the tip of the chute 3b is positioned so that the small lump 1 flowing out of the chute 3b at an angle of repose does not exceed the top of the rotary drum 4, the small lump 1 is partitioned. It is possible to prevent the liquid from flowing out directly to the discharge port 9 beyond the uppermost part of the rotary drum 4 without entering the chamber 5.
[0020]
The gap between the rotary drum 4 and the casing 6 is equal to or larger than the maximum size of the small lump 1 along the rotation direction from the uppermost portion of the rotary drum 4.
[0021]
This prevents the small lump 1 whose tip protrudes from the partition chamber 5 from coming into contact with the casing 6 at the rotation position after the uppermost portion of the rotary drum 4 and prevents the rotation of the rotary drum 4 from becoming unstable. .
[0022]
A pulse counter 8 is attached to the electric motor 7, and the discharge amount from the rotary drum 4 can be measured by counting the rotation angle or the number of rotations of the rotary drum 4.
[0023]
Note that the discharge amount from the rotary drum 4 may slightly vary when the number of the partition chambers 5 is small. However, as the number of the partition chambers 5 increases, the variation decreases. It is preferable to have eight or more chambers.
[0024]
In the small lump feeder device configured as described above, the discharge amount for one rotation of the rotary drum 4 or one chamber of the partition chamber 5 is measured in advance, and the amount of the lump lump 1 cut out is measured. Is determined, the rotary drum 4 is rotated by the electric motor 7 and stopped until the cut amount becomes a value commensurate with the cut amount, whereby a predetermined amount of the small lump 1 can be cut. The rotation speed may be determined according to the necessary cut-out speed.
[0025]
By rotating the rotating drum 4 at a constant speed by the electric motor 7, it is possible to discharge continuously at a constant flow rate.
[0026]
Further, when the small lump 1 is caused to flow through a pipe, if it flows at a stretch, the pipe may be clogged. Therefore, it is necessary to discharge a fixed amount intermittently. Such an intermittent discharge is also possible.
[0027]
FIG. 2 shows an example of equipment incorporating the small lump feeder device according to this embodiment.
[0028]
As described above, in the small lump feeder device according to this embodiment, a predetermined amount of small lump can be stably cut out with a simple structure.
[0029]
That is, the conventional method using the electromagnetic feeder requires two sets of hoppers and a load cell, but in the feeder according to this embodiment, only one set of hoppers is required, and installation in a narrow space is correspondingly required. It is possible. Therefore, equipment costs can be reduced.
[0030]
In the case of using the electromagnetic feeder according to the conventional method, if there is a variation in the particle size distribution of small lumps, the discharge flow rate also varies, but the feeder according to this embodiment does not vary.
[0031]
Although the conventional rotary feeder is limited to the granular material, the feeder according to this embodiment can stably cut out even small lumps without stopping by biting.
[0032]
【The invention's effect】
By using the small lump feeder device of the present invention, a predetermined amount of small lump can be stably cut out with a simple structure.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing an embodiment of the present invention.
FIG. 2 is an overall view of a facility incorporating an embodiment of the present invention.
FIG. 3 is an overall view of a facility incorporating a conventional feeder device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Small lump 2 Storage hopper 3, 3a, 3b, 3c Chute 4 Rotating drum 4a Rotating shaft 4b Partition plate 5 Partition room 6 Casing 7 Motor 8 Pulse counter 9 Discharge port 10 Electromagnetic feeder 11 Storage hopper 12 Storage hopper opening / closing damper 13 Storage Hopper opening / closing damper cylinder 14 Load cell 15 Electromagnetic feeder

Claims (1)

A feeder device for cutting out a predetermined amount of small lumps stored in a hopper, which is provided in a casing and partitioned into a plurality of partition chambers by partition plates radially attached to a rotating shaft extending in a horizontal direction. A rotary drum, and a chute forming a supply passage for supplying the small lump from the hopper to the partition chamber, wherein the supply passage has an inclination angle larger than a friction angle of the small lump and a passage height. A passage that is at least twice as large as the size of the small lump and is bent in the vertical direction, and the position at which the small lump is supplied from the supply passage to the partitioning chamber is rotated upward from the same height position as the rotation axis. Along the distance between the uppermost position of the rotating drum and along the rotating direction from the uppermost position of the rotating drum, the gap between the casing and the rotating drum is larger than the maximum size of the small lump. Becoming Nodules was Feeder apparatus characterized by.

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