JPH0137189B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a circular vibrating sieve machine, and more particularly to a vibrating electric motor in which a sieve net stretched approximately horizontally on a cylinder body is disposed approximately perpendicularly thereto. The present invention relates to a circular vibrating sieve machine that sieves the material on the sieve screen by vibrating the sieve.

[Prior art and its problems] FIGS. 4 to 8 show conventional examples of a circular vibrating sieve machine, and in these figures, the circular vibrating sieve machine is indicated as a whole by 1. A sieve net 4 is stretched inside the upper cylinder 2 via a mounting member 3, and a screening ball 8 is attached to a partition wall 7 below the sieve net 4.
(See Figure 6) Punched metal 5
is housed above. The punched metal 5 is fixed to the upper edge of the middle cylindrical body 6, and an inverted conical guide member 9 is fixed below this.

Similarly, a sieve net 10 is stretched on the middle cylinder 6 via a mounting member 13, and a screening hole 8 is accommodated on a punched metal 11 below the sieve net 10.
The punched metal 11 is fixed to the upper edge of the lower cylindrical body 12, and a conical material discharge guide 14 is fixed to the center thereof.

A material discharge port 15 is integrally formed in the side wall of the lower cylindrical body 12, and the material on the material discharge guide 14 is discharged to the outside through this port. Similarly, material discharge ports 16 and 17 are integrally formed in the side walls of the upper cylinder body 2 and the middle cylinder body 6, and these material discharge ports 15, 16, 17 are spaced at predetermined angular intervals as shown in FIG. It is arranged at a distance. A lid 18 is fixed to the upper cylinder 2, and a material receiving opening 18a is formed in the center thereof.

The above-mentioned upper cylinder 2, middle cylinder 6 and lower cylinder 1
2 are assembled integrally, and the entire structure is supported vibratingly on a support casing 21 by a large number of coil springs 22 via a support ring 19 fixed to the lower cylindrical body 12. 27 is a substrate. As shown in FIG. 7, a plurality of mounting plates 20 extending in the radial direction are fixed to the support link 19, and a plurality of mounting plates 20 are fixed to the support link 19.
A vibration motor 23 is mounted by a plurality of lower mounting plates 25 fixed to the lower end of the . Vibration motor 23
has a known structure and is mounted so that its axis of rotation is vertical. Unbalanced weights 24a and 24b each having a substantially semicircular shape, the shape of which is clearly shown in FIG. It's summery.

Due to the rotation of the unbalanced weights 24a, 24b, the cylinders 2, 6, 12, and therefore the sieve nets 4, 1
At 0, a vibration force consisting of a circular vibration component in the horizontal plane and a linear vibration component in the vertical direction is generated, and the material supplied through the material receiving port 18a from the belt conveyor 28 disposed above is transferred to the upper stage. It is divided into a lower sieve and an upper sieve on a sieve net 4 stretched inside the cylinder 2, and the upper sieve is discharged to the outside through the discharge port 17, and the lower sieve falls onto the guide member 9, and this The material is guided through the central opening 9a of the member 9 onto the sieve screen 10 below.

A similar action occurs on the sieve net 10, and the upper part of the sieve is discharged to the outside through the outlet 16, and the lower part of the sieve falls onto the discharge guide 14 and is discharged through the outlet 15. The mesh size of the upper sieve screen 4 is larger than the mesh size of the lower sieve screen 10. Therefore, material with large grain thickness is discharged from the upper discharge port 17, material with medium grain thickness is discharged from the middle discharge port 16, and material with small grain thickness is discharged from the lower discharge port 15. be done.

Unbalanced weight 24 of vibration motor 23
By changing the angle between a and 24b to 0°, 15°, 40°, and 90°, the material on the sieve screens 4 and 10 moves as shown in FIG. One of the angles is selected depending on the characteristics of the material to be sieved, but at any angle, except for 90°, the material tends to spread toward the outer periphery on the sieve nets 4 and 10. do.

Therefore, the material supplied onto the upper sieve screen 4 by the belt conveyor 28 is spread to the outer periphery due to the above-mentioned vibrations, and in this process is subjected to an efficient sieving action. The same applies to the material on the lower sieve screen 10. Note that the balls 8 push through the sieving nets 4 and 10, making the sieving action more effective.

The material is continuously supplied from the belt conveyor 28, and if this supply amount is small, there is no problem, but as the supply amount becomes large, this sieving machine 2
When the throughput capacity of the material is exceeded, the layer thickness of the material on the sieve nets 4, 10 increases, and eventually the material on the top of the layer does not come into contact with the sieve nets 4, 10 and is directly discharged without being sieved. Exit 16, 17
is discharged to the outside.

A similar problem also occurs when the material is fed onto the sieve screen 4 in batches rather than continuously by the belt conveyor 28. In other words, it is possible to supply a thin layer in one batch, but this is inefficient and requires continuous supply. The thicker the layer, the more material will be discharged outside without being screened.

Furthermore, it is clear that the same problem as described above will occur even if a fixed hopper is provided above in place of the belt conveyor 28 described above and the material is fed from there onto the sieve net 4. Problem] The present invention has been made in view of the above problems, and an object of the present invention is to provide a circular vibrating sieve machine that can utilize its processing capacity particularly effectively in both batch and continuous types, and can therefore be made more compact. With the goal.

〔means〕

The above purpose is to vibrate an approximately circular sieve net stretched almost horizontally on a cylindrical body using a vibrating electric motor installed approximately perpendicularly to the sieve net. In a circular vibrating sieve machine, the material on the sieve screen is sieved by applying a vibration force consisting of a circular vibration component in the vertical direction and a linear vibration component in the vertical direction. A material storage section is provided so as to vibrate, an opening is formed in the peripheral edge of the floor of the material storage section, and a guide member extending toward the center of the sieve mesh below is connected to the opening. The excitation force causes the material to move radially outward and circumferentially along the periphery on the sieve screen, so that the material is fed from the opening at a substantially predetermined feed rate downward through the guide member. This is achieved by a circular vibrating sieve machine characterized in that the sieve is guided to a substantially central portion on the sieve screen.

[Effect]

When the vibrating electric motor is driven, the material stored in the material storage section is fluidized and supplied from the opening to the center of the sieve screen at a substantially constant supply rate. The material spreads out to the outer periphery on the screen and is effectively screened in this process. The material layer thickness of the sieve screen is assumed to be approximately constant.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 3. In addition, Fig. 4~ showing a conventional example
Corresponding parts in FIG. 8 are given the same reference numerals.

The circular vibrating sieve machine of this embodiment has a total of 30
It is indicated by. A cylindrical material storage section 31, ie, a hopper, is fixed to the upper part of the upper cylindrical body 2. A lid 32 is fixed to the hopper 31, and a material receiving opening 32a is formed in the center thereof. The hopper 31 has a floor surface 33, and an opening 33a is formed in the outer periphery of the floor surface 33. A guide 36 is fixed to the floor in communication with the opening 33a, and the lower end opening 36
A extends into the center of the sieve screen 36.

The size of the opening 33a can be adjusted by a gate plate 34. As shown in FIGS. 2 and 3, the gate plate 34 has a pair of guide rails 36a', 3
6b' allows it to slide in the direction of the arrow, and is fixed to the floor surface 33 at a desired position with a set screw 35.

Although illustration of the structure below the middle cylinder 6 is omitted, it is the same as that of the conventional example. In order to make the diagram easier to understand, the guide rails 36a', 36
Although b′ is shown quite large, it is actually the floor surface 33
shall not essentially impede the flow of material above. Further, it is assumed that the capacity A of the hopper 31 is sufficiently large.

The circular vibrating sieve 30 according to the embodiment of the present invention is constructed as described above, and its operation will be explained next.

Although not shown, it is assumed that a sufficient amount of material is stored in the hopper 31. Vibration motor 23
When driven, the hopper 31, the upper cylindrical body 2, the middle cylindrical body 6, etc. perform a composite vibration of circular vibration in the horizontal plane and linear vibration in the vertical direction. The angle between the unbalanced weights 24a and 24b is 0°, 15°, or 40°. The material on the floor surface 33 of the hopper 31 moves as shown in FIG. 8, spreads toward the outer periphery, and circulates around the outer periphery. The material is discharged from the opening 33a while going around the outer periphery, and the material is discharged from the guide 3.
6 and is supplied to the center of the sieve screen 4 in the upper cylinder body 2. The material moves in a similar manner on the sieve screen 4, and is subjected to a sieving action mainly in the process of spreading toward the outer periphery. Opening 33a of hopper 31
is adjusted to an appropriate size in advance, so the layer thickness of the material on the sieve net 4 is such that the supplied material is uniformly sieved.
Furthermore, the distribution is uniform, and there are no blank areas of material on the sieve screen 4. Guide 3
6 is supplied in substantially a predetermined amount, so that the above-mentioned effective sieving action is performed continuously.

The material circulating around the outer periphery and on the sieve is discharged to the outside through the discharge port 17, and the material under the sieve is introduced into the center of the sieve net 10 in the middle cylinder 6, and is on the sieve net 4 above. Under the same action, the upper part of the sieve is discharged to the outside from the discharge port 16, and the part under the sieve is discharged to the outside from the lowermost discharge port 15.

As long as the material is stored in the hopper 31,
The above-mentioned sieving action is performed continuously, and materials of various particle thicknesses are continuously discharged from each discharge port 15-17. In addition, if there is a part where no material exists on each sieve net 4, 10, the opening 33a is made larger, and the material to be under the sieve is removed from the discharge port 16,
In the case where the liquid is discharged from 17, the layer thickness is too large, so the opening 33a may be made smaller. In any case, the material spreads toward the outer periphery on the floor surface 33 within the hopper 31, and is supplied downward from the opening 33a while going around the outer periphery, so that the material is distributed according to the size of the opening 33a. It is supplied at a predetermined discharge rate. If the hopper is a stationary body, the material may become clogged at the opening and not flow out, but this does not occur in this embodiment, and moreover, the material can be discharged at a substantially predetermined flow rate. It can be said that the hopper 31 has both the functions of a normal stationary hopper and a cutting feeder.

The embodiments of the present invention have been described above, but of course the present invention is not limited thereto, and various modifications can be made based on the technical idea of the present invention.

For example, in the above embodiment, the sieve net was provided in two stages to form a so-called two-stage sieve machine, but the number of stages is not limited to this and may be one stage or three or more stages.

Further, in the above embodiment, the gate plate 34 for adjusting the size of the opening 33a is provided inside the hopper 31, but it may be made adjustable from the outside.
In this case, for example, a slit may be formed in the peripheral wall of the hopper 31, and the gate plate may be inserted through the slit.

In addition, in the above embodiment, the material is stored in the hopper 31 in a so-called batch type, but as in the conventional example, the belt conveyor 28 is disposed further above, and the material is intermittently supplied to the hopper 31 from there. It's okay.

〔Effect of the invention〕

As described above, according to the circular vibrating sieving machine of the present invention, it is possible to fully utilize its processing capacity to efficiently sieve materials, and it is possible to further downsize the sieving machine. Furthermore, a quantitative supply device such as a belt conveyor can be omitted, and costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway view of a main part of a circular vibrating sieve according to an embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of the same main part, and FIG. 3 is a sectional view along the - line in FIG. Fig. 4 is a partially broken elevation view of a conventional circular vibrating sieve machine, Fig. 5 is a plan view thereof, Fig. 6 is a cross-sectional view in the - line direction in Fig. 4, and Fig. 7 is a - line direction in Fig. 4. The sectional view and FIG. 8 are charts for explaining the same effect. In the figure, 30...circular vibrating sieve machine,
31...hopper, 33...floor surface, 33a...opening.

Claims (1)

[Scope of Claims] 1. A substantially circular sieve net stretched almost horizontally on a cylinder body is vibrated by a vibrating electric motor disposed substantially perpendicularly to the sieve net, thereby causing the sieve net to:
In a circular vibrating sieve machine that sieves the material on the sieve net by applying a vibration force consisting of a circular oscillation component in this plane and a linear oscillation component in the vertical direction, the cylindrical body is placed above the sieve net. A material storage section is provided so as to vibrate integrally with the material storage section, an opening is formed at the peripheral edge of the floor of the material storage section, and a guide member extending toward the center of the sieve screen below is connected to the opening. The excitation force of the vibrating motor causes the material to move radially outward and move around the periphery on the sieve screen, so that the material is passed through the guide member from the opening at a substantially predetermined feed rate. A circular vibrating sieve machine characterized in that the sieve is guided downward to a substantially central portion of the sieve screen. 2. The size of the opening is adjustable.
Circular vibrating sieve machine as described in Section.