JPH03188977A - Sorting device for particulate matter - Google Patents

Abstract

PURPOSE:To prevent the vibration of the entire classifier by providing a driving means for horizontally rotating the upper housing provided with a screen for classifying particulate matter and lower housing with the same radius while keeping a phase of 180 deg.. CONSTITUTION:The sorting device for particulate matter is provided with the upper housing 1 furnished with a screen for sorting the particulate matter in the specified particle size range, the lower housing 2 of the same weight as the upper housing and a supporting means 3 capable of connecting the housings 1 and 2 so that the housings are freely rotated in the horizontal direction and held by a frame 9. The classifier is further provided with the driving means 4 for horizontally rotating the upper housing 1 and lower housing 2 around the main rotating spindle 14 with the same radius while keeping a phase of 180 deg., and centrifugal forces produced by the horizontal rotation of the housings 1 and 2 cancel each other. For example, when the spindle 14 is rotated, the eccentric shafts 17 and 18 are horizontally rotated around the spindle 14 at a phase of 180 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a sorting device for granular materials, and more specifically, it supplies granular materials such as grains, flour, or earth and sand into a box provided with a screen. It is used to sort the box into a predetermined size by horizontally rotating the box, and in particular, it is designed to eliminate vibrations that occur during horizontal rotation.

Conventional technology Conventionally, in this type of rotary-oscillating powder sorting equipment, a box body equipped with a screen for sorting powder and granules of a predetermined size range from the powder and granules is combined with a machine frame. It is supported from below by connected rods or the like, or from above by wires connected to the machine frame, and the box is horizontally rotated by an eccentric shaft.

The eccentric shaft is equipped with a balance weight of a weight corresponding to the weight of the box, and when rotating and rocking the box,
The eccentric shaft itself rotates while maintaining its balance.

Problems to be Solved by the Invention However, as mentioned above, since the box body is supported on the machine frame by wires or rods, the centrifugal force applied to the box body that rotates horizontally during operation is transmitted through the rods, etc. and is transmitted to the machine frame.

As a result, a force acting in the direction of centrifugal force acts on the entire machine, and from the perspective of the overall balance of the machine, the box body swings the entire machine around, and if the machine is not installed firmly, vibrations will occur throughout the machine. Normally, the machine is firmly fixed to the concrete floor using anchor bolts, etc. However, if the centrifugal force caused by the horizontal rotation of the box is large and vibrations are severe, the concrete to which the machine is fixed may crack. In particular, when installing in a high place, a strong stand that can withstand vibrations is required.

It is an object of the present invention to solve the above-mentioned problems in the conventional particle sorting apparatus and to prevent vibrations from occurring in the entire machine during operation.

Problems to be Solved by the Invention Accordingly, the present invention provides an upper box body and a lower box body of approximately the same weight that are equipped with a screen for sorting powder and granular materials of a predetermined size range, and the upper box body and the lower box body. A support means that connects the boxes horizontally and rotatably and is held on the machine frame, and a screen that allows only powder and granular materials smaller than the size to pass through the two-tier box and the lower box that rotate around the main shaft. The upper and lower boxes are made of flexible material such as cloth to enable multiple stages of sorting and to supply the powder and granules that have passed through the screen of the upper box to the lower box. The upper and lower boxes are connected to each other by the lightweight tubes, making it possible to sort multiple stages.

As described above, the powder and granule sorting device according to the present invention connects the upper and lower boxes of approximately the same weight so that they have the same radius and a phase of 180° about the main shaft of rotation. Since the centrifugal force acting on the upper box body and the centrifugal force acting on the lower box body are canceled out, vibrations are not transmitted to the machine frame and the entire machine does not generate vibration.

Next, the present invention will be described in detail based on embodiments shown in the drawings.

In the figure, 1 is an upper box, 2 is a lower box with approximately the same weight and shape as the box 1, and 3 is supported by the machine frame 9 and has the same radius.
and a driving means for horizontally rotating the upper and lower boxes while maintaining a phase of 0°, and having a structure in which centrifugal forces generated when the upper and lower boxes rotate horizontally cancel each other out. It provides equipment.

The above-mentioned support device has four rods whose central part is held by a spherical sliding bearing fixed to the machine frame, and the upper end of each rod is attached to the bottom surface of the upper box, and the lower end is attached to the upper surface of the lower box. It is configured to be connected to an attached spherical sliding bearing.

The driving means is fixed at each end to a rotating main shaft of a rotating main shaft pulley to which the rotation of a motor attached to the machine frame is transmitted via a motor pulley and a belt.
A pair of eccentric metals of the same size extend horizontally in phase with each other, each fixed to the outer end of the eccentric metal at an equal distance from the rotational main shaft, and the other end attached to the center of the upper box body or the lower box body. It is equipped with a pair of rotating main shafts that are mounted on bearings.

Furthermore, the upper box body and the lower box body are supporting means for connecting and supporting the upper box body 1 and the lower box body 2 at predetermined vertical positions, respectively, and 4 is a driving means for horizontally rotating the upper box body l and the lower box body 2. be.

In the support means 3, four spherical sliding bearings 5a, 5b15c are provided at the four corners of the lower surface of the upper box l.

5d and four spherical sliding bearings 6a, 6b, 6c, and 6d provided at the four corners of the upper surface of the lower box body 2, respectively, to the rod 7a.

They are connected by 7b, 7c, and 7d. The rod 7a.

The central portions of 7b, 7c, and 7d are rotatably supported by rotary sliding bearings 8a, 8b, 8c, and 8d fixed to the machine frame 9. Therefore, the upper box body 1 and the lower box body 2 are supported by the machine frame 9 so as to be horizontally rotatable, and are also interlocked with each other.

The driving means 4 includes a motor 10 fixed to the machine frame 9,
The rotation of the motor IO is transmitted from the motor pulley 11 to the rotating main shaft pulley 13 via the belt 12.

The rotating main shaft pulley 13 is fixed to the rotating main shaft 14,
One end of an eccentric metal 15, 16 is fixed to both the upper and lower ends of the rotating main shaft 14. The eccentric metals 15 and 16 extend horizontally with a phase of 180° centering on the rotational main shaft 14, and one end of a vertical eccentric shaft 17 and 18 is connected to the tip of each of the eccentric metals 15 and 16 from the rotational main shaft 14 to the eccentric shaft. The distances r to 17 and 18 are fixed to be equal.

On the other hand, the other ends of the eccentric shafts 17 and 18 are supported by a bearing 19a fixed to the center of the lower surface of the upper box 1 and a bearing 19b fixed to the upper surface of the lower box 2, respectively.
When rotates, the eccentric shafts 17 and 18 are both centered on the main rotational axis 14 (thus, they are horizontal in the same rotational direction while maintaining a phase of 180° with the same radius r, that is, they are arranged symmetrically with respect to the rotational main axis 14). The eccentric shaft 17.
18 rotation, the upper box body 1 and the lower box body 2 rotate by 180 degrees around the main rotational axis I4, as shown in FIG.
It is designed to rotate horizontally at the same radius while maintaining the same phase.

The upper box body 1 has a substantially rectangular parallelepiped shape and is provided with an inlet 20 for powder and granules at one end of the upper side, and discharges a screen powder and granules inside which only allows powder and granules of a predetermined size or smaller to pass through. It is supposed to be done. The size of powder that can pass through the screen 2bi of the lower box 2 is smaller than that of the screen 22 of the upper box 1, and the size of the powder that can pass through the screen 22° is further smaller than that of the screen 21'. That is, the upper box body 1
And the screens of the lower box body 2 are 21, 22, 21', 22
The other parts of the structure of the lower box body 2 are almost the same as the first box body, so the same numbers are given and the explanation is omitted.

Next, the operation of this embodiment will be explained.

First, the driving of the driving means and the movement of the box will be explained.

When the motor 10 starts, the rotation of the motor 10 is transmitted to the motor pulley 11, the V-belt 12, and further to the rotating main shaft 14 of the rotating main shaft pulley 13. When the rotating main shaft 14 rotates, the eccentric metal 15 fixed to the rotating main shaft 14
．． 16 and eccentric shafts 17 respectively connected to the eccentric metals.
18 horizontally rotates around the rotation main shaft 14 while maintaining a phase of 180°. The eccentric shaft I7.18 is provided with an upper stage 21 and a screen 22, which allows only particles of a predetermined size or smaller to pass through the screen 2I, which are inclined from above.

, the screens 21 and 22 are each provided with discharge ports 23 and 24 on the lower side of the slope (on the right side in FIG. 1), so that powder and granules of a predetermined size or larger that do not pass through the screen are discharged from the upper box l. It has become. A passage 25 is provided at an angle between the screen 21 and the screen 22, so that the powder passing through the screen 21 falls onto the screen 22 from the opening 25a. Further, a passage 26 is provided at an angle below the screen 22 to guide the granular material that has passed through the screen 22 to a discharge port 27 .

A flexible and lightweight cylinder 30 made of cloth or the like is attached to the outlet 27, and the powder and granules discharged from the outlet 27 are supplied to the inlet 20' provided above the lower box body 2. are doing.

The lower box 2 has approximately the same weight and the same shape as the upper box 1, and has discharge ports 27 to 8 provided on the lower surface, a bearing 19a on the lower surface of the box 1, and a bearing 1 on the upper surface of the lower box 2.
9b, the upper box l and the lower box 2
have the same radius around the rotational main shaft 14, and 18
Horizontally rotates in the same direction while maintaining a 0° phase.

Furthermore, as mentioned above, since the upper box 1 has approximately the same weight as the lower box 2, the centrifugal forces generated in the upper box 1 and the lower box 2 cancel each other out, causing horizontal forces on the machine frame 9. does not act, and there is no effect that causes vibrations in the entire machine frame 9.

The sorting action of the powder and granular material performed during the above-mentioned horizontal rotation will be explained. Incidentally, the granular material that can be used with the sorting device of this embodiment is, for example, grains, earth and sand, wheat, etc., and is not particularly limited.

During the operation of the drive device 4, the powder and granular material that flows in from the inlet 20 of the upper box body 1 first flows over the screen 21 that is making horizontal rotational movement. Then, the powder and granular materials smaller than a predetermined size pass through the screen 21 and fall onto the passage 25, while other powder and granular materials are discharged from the discharge port 23 to the outside of the upper box l.

The powder and granules that have fallen into the passage 25 fall onto the screen 22 from the opening 25a, and as in the case of the screen 21 described above, the powder and granules that are smaller than a predetermined size pass through the screen 22 and fall into the passage 26. , other powder and granular materials are discharged from the outlet 24.
more excreted. The powder and granules that have fallen into the passage 26 are discharged from the outlet 2.
7, and is supplied from the discharge port 27 through the cylinder 30 to the inlet 20'' of the lower box body 2.

The powder and granular material supplied to the lower box body 2 is transferred to the above-mentioned upper box body I.
In the same manner as in the above case, the screens 21' and 22° are used to sort out the sizes within a predetermined range, and the discharge ports 23', 24" and 24" are respectively selected.
The powder is discharged from 27'.

At this time, as mentioned above, since the screens with the mesh sizes are sequentially arranged from above the upper box body 1 to below the lower box body 2, the discharge ports 23, 24, 23', 2
The grains discharged from 4° and 27° become smaller in this order.

Although the screen has four stages in this embodiment, it is not limited to this and may have any number of stages. In addition, the connection and support 1 between the upper box body and the lower box body...the upper box body,
2...Lower box body, 5 a, 5 b15 cs 5
d16a, 6b, 6c, 6d1 8a, 8b, 8c, 8d, ... Spherical plain bearing, 7
a, 7b, 7c, 7d, "Rod, 9...
- Machine frame, 10...Motor 13...Rotating main shaft pulley I4...Rotating main shaft, I5.16...Eccentric metal, 17.18...Eccentric shaft, 19a119b-bearing.

Claims (1)

[Claims] 1. An upper box body and a lower box body having substantially the same weight, each of which is equipped with a screen for sorting powder and granular materials of a predetermined size range, and horizontally rotating the upper box body and the lower box body. A support means that is freely connected and held on the machine frame, and a drive means that horizontally rotates the upper box body and the lower box body about a rotational main shaft while maintaining a phase of 180° at the same radius, A particle sorting device characterized in that the upper box body and the lower box body are configured to offset the centrifugal forces generated with each other during horizontal rotation.