JPH02149354A - Vertical impact type crusher - Google Patents

Abstract

PURPOSE:To enhance improvement degree of grain diameters by providing an outside rotor disposed concentrically on the outside of an inner side rotor and rotating in the direction reverse to the inner side rotor, and also providing a number of vertical walls inclined in the rotation direction to the radius direction of the outside rotor between a top plate and bottom plate. CONSTITUTION:An inner side rotor 6 giving centrifugal force to a raw material fed from above and discharging the same in the radius direction is provided in a ring crushing chamber 2 of a housing 1. Also, an outside rotor 15 disposed concentrically on the outside of said inner side rotor 6 and rotating in the direction reverse to the inner side rotor 6 is provided. A number of vertical walls 19 included in the rotating direction to the radius direction of the outside rotor 15 are disposed between a top plate 17 and a bottom plate 18 of said outside rotor 15, and fine powder discharge through-holes 21 are provided on the vertical walls 19. Thus, sharp edges are removed after crushing the raw material to enhance the improvement degree (edge removal) of grain diameters, and crushing capability is further enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vertical impact crusher that improves crushed materials such as crushed stone into a rounded particle shape similar to that of natural aggregate.

[Prior Art] Artificial aggregate for civil engineering and construction is generally a crushed product obtained by first crushing rock using a show crusher and then second crushing using a cone crusher. It also includes flat objects and elongated objects.

When the above-mentioned crushed product is used as aggregate for concrete, the strength of the concrete is lower than that of the original natural base material due to the influence of its particle shape, so to achieve the same strength, more cement is required, etc. Due to this problem, in recent years a method has been adopted to adjust the particle size to a roundness similar to that of natural aggregate (grading).

An example of a method for adjusting the particle shape of the crushed product is disclosed in Japanese Patent Publication No. 53-33785.

In FIG. 6, a discharge rotor q that rotates via a rotation shaft f supported by a bearing e is provided in a housing d consisting of a bottom plate a, a vertical wall, and a top disk C.
is rotated at high speed by a drive motor h.

Therefore, the material to be crushed (hereinafter referred to as raw material) fed into the rotor q by the material to be crushed supply device i provided at the upper center of the rotor is moved by centrifugal force through a discharge path composed of blades (not shown). Then, it is ejected from the rotor q in the horizontal direction. The discharged raw material is deposited in the housing d,
A deposited bed j of the raw material is formed at a predetermined angle of repose.

Thereafter, the subsequently discharged raw material collides with the surface k of the sloped stacking bed j, and the raw material is sized (grain shape correction).
is carried out. The sized particles are discharged outside the machine through the discharge port e.

[Problem to be Solved by the Invention] However, since the surface of the deposition bed j is in an inclined state that maintains the angle of repose of the raw material, and the material collides with the inclined surface k at a certain angle, the collision force is is dispersed,
The crushing performance deteriorates accordingly, and in the end, only the granulating action of removing the corners of the raw material is exerted.

Of course, if the speed of the raw material is increased, it will be crushed accordingly, but the power consumption will increase accordingly, which is not economical.

In addition, since crushing and grading are performed at the same time in the pile bed j, for example, even if a flat object or an elongated object is crushed, it often falls without the corners of the crushed surface being smoothed. In order to improve this, a method has been proposed in which the corners of the raw material are removed (grading) and the crushing to a desired size is performed at different locations.

For example, Japanese Patent Application Laid-Open No. 59-66360.

This method crushes the raw material after cutting its corners, so even if the corners of the flat object are removed before crushing, the crushed surface after the flat object is crushed in the same way as described above. The corners are often not sufficiently removed.

Therefore, the present invention was made in order to improve the above-mentioned drawbacks, and it is a vertical impact that improves the particle size improvement degree (cornering) and further improves the crushing ability by cutting the corners after crushing the raw material. The purpose is to provide a type crusher.

[Means for Solving the Problems] In order to achieve the above object, the vertical impact crusher of the present invention applies centrifugal force to the raw material charged from above into the annular crushing chamber of the housing to radially radially crush the raw material. an outer rotor disposed concentrically outside the inner rotor and rotating in a direction opposite to the inner rotor; the outer rotor is arranged between a top plate and a bottom plate in a radial direction of the outer rotor; A large number of vertical walls are provided that are inclined in the direction of rotation, and fine powder discharge holes are provided in the vertical walls.

[Operation] The raw material inputted from the upper input port is accelerated by centrifugal force from the rotating inner rotor and discharged horizontally in the radial direction.

The discharge direction of the raw material is slightly outward from the tangential direction of the inner rotor.

The raw material discharged in the direction collides with the pile bed layer of raw material formed by the vertical wall of the outer rotor rotating in the rotational direction of the inner rotor, that is, in the opposite direction to the discharge direction of the raw material, and is crushed by the impact force. Ru.

Since the pile bed is tilted in the direction of rotation with respect to the radial direction of the outer rotor, the material impinges on the pile bed at a substantially right angle and is effectively crushed.

The raw material after impact crushing is discharged again while being accelerated by centrifugal force along the pile bed.

Specifically, in the deposition bed, a deposited layer of a required thickness is formed by the lower end of the outer rotor, and the raw material slides and rolls on this deposited layer. That is, the raw materials rolling on the surface of this deposited layer repeatedly collide with each other, and the corners of the raw materials are dropped while they are moving.

Of course, the raw materials in the surface layer of the sediment layer are constantly being moved in the discharge direction due to centrifugal force, so they move while replacing (replacing) the raw materials being transferred, and the surface layer of the sediment layer moves. Grain grading is also performed effectively because a new layer of raw material is constantly formed.

At this time, fine powder (dust) is generated due to collision, sliding, transfer, and movement of raw materials. The generated fine powder will enter the pile bed, but this fine powder will be discharged through the discharge hole in the vertical wall and will not be deposited in the pile bed.

Subsequently, the ejected raw material collides with the inner wall of the housing, and the corners of the raw material are removed again.

In this way, the crushed and sized raw material falls within the housing and is discharged.

[Example] Embodiments of the present invention will be described with reference to FIGS. 1 to 3.

Reference numeral 1 denotes an annular housing 10, in which an annular crushing chamber 2 is formed, and a raw material supply port 3 is provided at the center of the upper part of the crushing chamber 2.
A supply pipe 4 is provided having a diameter, and a discharge port 5 is provided in the lower part of the housing.

Reference numeral 6 denotes an inner rotor disposed within the annular crushing chamber 2, and this inner rotor has a vertical rotation shaft 7 disposed on the center line of the housing 1.
Attached to the top of the The inner rotor 6 is made up of a top plate 8, a bottom plate 9, and a vertical wall 10 provided therebetween. wall facing the direction 1
0b and a circumferential wall 10G. Further, the vertical rotation shaft 7 is connected to an inner rotor drive motor 12 and a belt 13.
, is adapted to rotate via a pulley 14.

Reference numeral 15 denotes an outer rotor located outside and concentrically with the inner rotor, and this outer rotor is connected to the vertical rotation axis 7.
It is attached to a vertical hollow rotating shaft 16 provided on the outside of the shaft.

This outer rotor consists of a vertical wall 19 provided between a top plate 17 and a bottom plate 18, and a circular hole 20 is provided in this top plate 17.
The vertical wall 19 includes a radial wall 19a, an inclined wall 19b, and a circumferential wall 19c.

Reference numeral 21 denotes a fine powder discharge hole provided in the inclined wall 19b and the circumferential wall 19c of the vertical wall 19, and this hole is a punch hole or a slit hole.

Further, the vertical rotating wheel 16 is configured to rotate via an outer rotor phase drive motor 22, a belt 23, and a pulley 24.

Reference numeral 25 denotes a communication pipe disposed between the lower end of the supply pipe 4 and the opening 11. An appropriate gap is provided between the supply pipe 4 and the communication pipe 24, and a dust guide 25 is provided on the outside of the upper part of the communication pipe 25. It is something. 27 is a deposition plate.

Incidentally, the fine powder discharge hole 21 in the above-mentioned embodiment has the inclined wall 19b of the vertical wall 19 connected to a plurality of members 3 as shown in FIG.
dividing into 0 parts and arranging them with appropriate gaps;
Furthermore, as shown in FIG. 5, instead of the inclined wall 19b, the bar 3
1 by arranging them at appropriate intervals.

Next, the operation of the embodiment will be explained.

By starting the inner rotor drive motor 12, the inner rotor 6 is rotated in the direction of arrow A in FIG. 2, and by starting the outer rotor drive motor 22, the outer rotor 15 is rotated to the
The raw material is fed into the inner rotor 6 from the supply port 3 through the opening 11 while being rotated in the direction of the arrow in the figure.

The input raw material is deposited within the vertical wall 10 of the inner rotor 6, forming a deposit bed 28 of the raw material. Then, while the subsequent raw material is transferred on the stacking bed 28, a centrifugal force is applied thereto, and the raw material is discharged from the inner rotor 6.

The discharged raw material impinges on the vertical wall 19 of the outer rotor 15 rotating in the opposite direction to the direction of discharge of the raw material, and forms a deposit bed 29 of the raw material by the vertical wall 19. Subsequently, the discharged raw material collides with the bed 29. Due to this collision, the corner of the raw material is dropped and the bed 2
In the process of transferring over the outer rotor 15, the corner is further dropped and a centrifugal force is applied to the corner of the outer rotor 15.

Therefore, when the raw material of the deposited layer 29 roughly moves when it collides with the deposition bed 29 or slides/transfers on the deposition bed 29, fine powder of the raw material is generated. This fine powder (part of it) enters into the gaps between raw materials in the stacking bed, but the entered fine powder is sequentially discharged from the discharge hole 21 of the vertical wall 19 and does not accumulate in the layers of the stacking bed 29. be.

The raw material discharged from the outer rotor 15 collides with the inner wall of the annular crushing chamber 2, and the corners are also cut off here.

The raw material cut into corners as described above passes through the housing 1 and is discharged from the discharge port 5.

In the above description, the raw material discharged from the outer rotor collides with the inner wall of the crushing chamber 2, but the stacking plate 27 may be provided to form a bed of raw material here as well.

[Effects of the Invention] Since the present invention is configured as described above, it produces effects as described below.

An inner rotor is provided in the annular crushing chamber of the housing to apply centrifugal force to the raw material input from above and discharge it in the radial direction, and is arranged concentrically outside the inner rotor and rotates in the opposite direction to the inner rotor. An outer rotor is provided, and the outer rotor has a number of vertical walls inclined in the rotational direction with respect to the radial direction of the outer rotor between the top plate and the bottom plate.
Crushing and grading (shaping) are performed in different locations. In other words, since the raw materials are first crushed and then sized,
It was decided that the granulation of the crushed material would also be carried out reliably.
The product has a uniform particle size and has rounded corners, making it extremely useful for use in artificial aggregates.

In addition, since the raw material collides countercurrently (approximately at right angles) with the vertical wall of the outer rotor, which rotates in the opposite direction to the direction in which the raw material is ejected from the inner rotor, a great crushing effect is exhibited, especially for flat and slender objects. Crushing is ensured.

Further, since the fine powder discharge hole is provided in the vertical wall of the outer rotor, even if fine powder generated by collision of raw materials enters and accumulates in the deposition bed, the fine powder is discharged from the discharge hole. Therefore, there is no adverse effect caused by accumulation of fine powder, that is, deterioration in crushing and particle size regulation.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing an embodiment of the vertical impact type crusher of the present invention, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. FIGS. 4 and 5 are partially enlarged cross-sectional plan views showing other embodiments of the present invention,
FIG. 6 is a longitudinal sectional plan view showing a conventional example. 1... Housing 2... Annular crushing chamber 6... Inner rotor 15... Outer rotor 17... Top plate 19... ... Vertical wall 18 ... Bottom plate 21 ... Fine powder discharge hole

Claims (1)

[Claims] An inner rotor is provided in the annular crushing chamber of the housing to apply centrifugal force to the raw material input from above and discharge it in the radial direction, and is arranged concentrically outside the inner rotor and rotates in the opposite direction to the inner rotor. An outer rotor is provided, and the outer rotor has a number of vertical walls inclined in the rotational direction with respect to the radial direction of the outer rotor between the top plate and the bottom plate, and fine powder discharge holes are provided in the vertical walls. A vertical impact type crusher characterized by: