JP2011126694A - Screw conveyor having a plurality of discharge ports - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device capable of stably and accurately distributing a carrying object to respective discharge ports, by arranging a plurality of discharge ports in the same carrying direction by one screw conveyor. <P>SOLUTION: The carrying object is filled in the whole conveyor cross section by retraining a carrying speed by changing a rotating speed of a carrying screw blade of the screw conveyor in the middle of carrying, and a discharge part is divided by a partition wall, and the carrying object is distributively discharged to the respective discharge ports by a discharging screw small blade arranged in the partition wall, and thrust of a discharging small screw is detected, and the rotating speed of the carrying screw blade is controlled so that stable discharge is performed. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

      The present invention relates to an improvement of a screw conveyor that enables a conveyed product to be accurately distributed from a single supply unit to a plurality of discharge ports.

The screw conveyor is well-sealed and can be arranged in a narrow space, and is used in many places as a granular material conveying device that can adjust the amount of transportation relatively accurately by changing the number of rotations of the screw shaft.
However, in the case of a screw conveyor, since the conveyed product is conveyed by the thrust generated by the rotation of the screw shaft, the discharge port must be arranged at the position of the screw axis, and can be stably supplied to the discharge ports at a plurality of locations by one screw conveyor. However, it is difficult to perform highly accurate distribution and transportation except for distribution in the reverse direction.

In order to realize stable and highly accurate discharge to these multiple locations, it is necessary to supply the transported goods accurately and stably to each discharge port and to suppress interference caused by mutual discharge between the discharge ports. is necessary.

The present invention was made to solve such a problem, and by changing the number of rotations of the screw blades for conveyance in the course of conveyance, the conveyance speed is suppressed and the conveyance object is reliably filled in the entire conveyor cross section at the discharge port position. You may use together the change of the screw blade pitch which is a well-known technique, and the change of a blade diameter as needed.
At the discharge port position, the conveyor trough is divided in the conveyor axial direction by partition walls according to the number of discharge ports, and the conveyed product is discharged from a predetermined discharge port to another discharge port by a discharge screw blade arranged in each divided part. The screw blade rotation speed is controlled so that the conveyed material fills the entire cross section of the conveyor and is discharged stably. To do.
In addition, the number of screw small blades for discharge is appropriately increased or decreased according to the physical properties of the conveyed product so that the conveyed product in the partition wall flows reliably.

The following effects can be realized by the present invention.
(A) A single screw conveyor can be used to distribute and transport to multiple outlets.
(B) By detecting the thrust of the discharge screw blades, reliable distribution and transportation to each discharge port can be guaranteed.
(C) By detecting the thrust of the discharge screw blades, the screw conveyor blade speed can be controlled to control the screw conveyor such as overload prevention.
(D) By changing the partitioning angle, it is possible to change the transport amount to each outlet.

Is a side view of the present invention Is a cross-sectional view of the outlet (7) position Is a sectional view of the outlet (8) position Is a cross-sectional view of the discharge port (9) position

Next, embodiments of the present invention will be described with reference to the drawings as examples. In the present embodiment, the distribution to three locations is performed.
(A) The conveyed product introduced from the supply port (1) is sent to the compression unit conveyance screw blade (3) having a different rotational speed by the supply unit conveyance screw blade (2).
(A) The transported object compressed by the compression unit conveying screw blade (3) fills the entire cross section of the trough (4) and is sent to the discharging screw small blade (5).
(C) The transported goods are separated by the partition wall (6) and discharged from the discharge port (7), (8), (9) by the discharge screw blades.
(D) (10) is a well-known pressure detector installed on the discharge screw blade, and when the load is stable, this is omitted and the current value of the speed reducer and motor (13) is detected. May be
(E) (11) is a gear unit for driving a small blade for discharging.
(F) (12) is an intermediate bearing of the supply part and compression part conveying screw blades. If the load is stable, a known differential gear mechanism is incorporated here and the reduction gear and motor (14) are omitted. good

DESCRIPTION OF SYMBOLS 1 Supplied object supply port 2 Supplied part conveyance screw blade 3 Compressor part conveyance screw blade 4 Trough 5 Discharge screw blade 6 Bulkhead 7 Discharge port 8 Discharge port 9 Discharge port 10 Pressure Detector 11 is gear unit 12 is intermediate bearing 13 is a reduction gear, motor 14 is a reduction gear, motor

Claims (3)

A screw conveyor characterized in that screw blades for conveyance with different rotational speeds are arranged on the same axis. A screw conveyor characterized by having a plurality of discharge ports divided by partition walls arranged radially, and having discharge screw blades corresponding to each discharge port. A screw conveyor characterized by detecting the thrust acting on the screw blade shown in claim 2 and changing the rotational speed of the screw blade for conveyance.

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