JPH02122843A - Crusher of vertical impact type - Google Patents

Abstract

PURPOSE:To improve particle refining performance by providing a pair of rotors arranged vertically for imparting centrifugal force to the material introduced into an annularly-shaped crushing chamber of a housing to permit a horizontal discharging thereof in the radial direction. CONSTITUTION:The material to be crushed is introduced from a feed opening 3 through an upper opening 11 into an upper rotor 7. A part of this material is accumulated inside a vertical wall 10 of the upper rotor 7 to form an accumulated bed 27, The succeeding material is carried away from the upper rotor 7 in the direction of (c) by the centrifugal force created while it is rolling on the accumulated bed 27. A part of the material is then admitted from a lower opening 12 through an opening 19 into a lower rotor 16 and accumulated inside a vertical wall 22 thereof to form a bed 28. The succeeding material is carried away from the lower rotor 16 in the direction (d) while it is rolling on the bed 28 to form a sloping accumulated layer 29 on a bottom plate 2C and the continuously succeeding material is run against the sloping surface 29' thereof for crushing and refining.

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 aggregate due to the particle shape, so more cement is required to achieve the same strength. In recent years, a method of adjusting the particle size to a roundness similar to that of natural aggregate (grading) has been adopted.

Examples of methods for adjusting the particle shape of the crushed product include those disclosed in Japanese Patent Publication No. 53-33785 and Japanese Patent Application Laid-open No. 62-241557M.

In the former (Fig. 4), the bottom plate a and the vertical wall.

A discharge rotor q is provided in a housing d consisting of an upper disk C, and rotates via a rotation shaft f supported by a bearing e.
The discharge rotor q 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 once deposited in the housing d, and forms a deposited bed j of the raw material 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.

In the latter (Fig. 5), the raw material discharged from the rotor m collides with the inclined repulsion plate n and the side repulsion plate 0, and further collides with the falling raw material flowing in an arc shape to crush and size the raw material. It is.

[Problems to be Solved by the Invention] However, since all raw materials collide with an inclined surface, relatively many of the raw materials flow or bounce upward after the collision. Such raw materials bounce off the side walls and top plate and naturally fall through the air. Naturally, the raw material falling through the air passes through the path of the raw material discharged from the rotor, and the discharged raw material collides with the falling raw material in the air. This collision will result in crushing and grading, but the subsequent raw material will collide with the falling raw material, so sufficient impact force will not be obtained, and the kinetic energy will be lost and the slope will fall. The impact force may not be reached, or even if it is reached, only a weak impact force is exerted.

The raw materials released in this way have a drawback that the quality varies between those that collide with the original inclined surface and are reliably crushed and sized, and those that collide in the air and fall as they are.

Therefore, the present invention has been made in view of such problems with the conventional technology, and its purpose is to:
The present invention provides a vertical impact crusher that reduces variation in quality and significantly improves crushing and granulation performance.

[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 introduced from the center of the upper part into the annular crushing chamber of the housing to radially move the raw material into the annular crushing chamber of the housing. Two rotors discharging horizontally are arranged vertically, and the upper and lower rotors are rotated in different directions, and an inclined surface is formed in the annular crushing chamber at a position opposite to the lower rotor, and The discharged raw material is caused to collide head-on with the raw material discharged from the upper rotor.

Further, the inclined deposition surface is formed by depositing raw materials.

In addition, the slanted surface of the collision plate is used.

Further, the annular outer plate of the annular crushing chamber at a position facing the upper stage rotor is an arcuate surface.

[Operation] The raw material inputted from the center of the upper part is distributed to the upper and lower rotors, respectively, and is discharged in the radial direction by the centrifugal force caused by the rotation of the upper and lower rotors.

Therefore, the raw material discharged from the lower rotor first collides with the inclined surface, where it is crushed and sized, and moves upward on the inclined surface.

On the other hand, the raw material with kinetic energy released from the upper rotor in the opposite direction to the raw material discharge direction collides head-on with the raw material from the lower rotor at the end position of the inclined surface, and crushing and grading are performed again.

Roughly speaking, the raw materials that have collided at the above position are discharged from the lower end of the slope while repeatedly colliding with the following raw materials in the process of being transferred and flowing down the slope.

Furthermore, the upwardly flowing raw material collides with the downwardly flowing raw material in a countercurrent manner, so that scattering in the air is largely prevented.

Further, a part of the raw material discharged from the upper stage rotor collides with the arcuate surface and becomes a downward flow, which contributes to reducing air scattering and colliding with the raw material flowing upward.

[Example] Embodiments of the present invention will be described with reference to the drawings.

In FIGS. 1 and 2, reference numeral 1 denotes a housing placed on a pedestal 2, on which an annular crushing chamber 2 is formed and a supply pipe 4 having a raw material supply port 3 at the center of the upper part of the crushing chamber 2.
is rotatably provided, and has a discharge port 5 at its lower part. The crushing chamber 2 consists of a top plate 2a, an annular outer plate 2b, and a bottom plate 2c having a central opening 6, and the annular outer plate 2b has an arcuate surface on its half surface.

7 is an upper rotor placed in the upper center of the crushing chamber 2;
This upper stage rotor has a top plate 8, a bottom plate 9, a vertical wall 10 provided therebetween, and has an upper opening 11 in the top plate 8 and a lower opening 12 in the bottom plate 9. The upper rotor 7 is fixed to the supply pipe 5, and the supply pipe 5 is communicated with the upper opening 11.

Further, the rotor 7 includes an upper rotor driving motor 13, a belt 14. It is designed to be driven via a pulley 15. Further, the vertical wall 10 is composed of a wall 10a facing approximately in the radial direction, a wall 10b facing in the rotational direction, and a wall 10G facing in the circumferential direction.

A lower rotor 16 is located in the crushing chamber 2 and is disposed concentrically below the upper rotor 7. This lower rotor is attached to the upper end of a vertical rotating ring 18 supported by a bearing 17 of the housing 1.

This lower rotor 16 is connected to a top plate 2 having an opening 19.
The communication pipe 23 provided in the opening 19 of the top plate 20 can face the lower opening 12 of the upper rotor 7, and the vertical wall 22 is connected to the upper rotor 7. Similarly, it includes a wall 22a facing approximately in the radial direction, a wall 22b facing in the rotational direction, and a wall 22G facing in the circumferential direction. Further, the vertical rotation shaft 18 is connected to a lower rotor drive motor 24. Belt 25. It is designed to be driven via a pulley 26.

The operation of the embodiment will be explained.

By starting the upper rotor drive motor 13, the upper rotor 6 is rotated in the direction of arrow A in FIG. 2, and by starting the lower rotor drive motor 24, the lower rotor 16 is rotated to the second
The raw material is fed into the upper rotor 7 from the supply port 3 through the upper opening 11 while being rotated in the direction of the arrow in the figure.

A portion of the input raw material passes through the vertical wall 10 of the upper rotor 7.
The material is deposited within the material to form a deposition bed 27 of the raw material.

The raw material that follows on the stacking bed 27 is transferred while being subjected to centrifugal force and is discharged from the upper rotor 7 in the direction of the arrow C.

Further, a part of the raw material charged into the upper rotor enters the lower rotor 16 from the lower opening 12 through the opening 19. The raw material that has entered here is transferred to the vertical wall 22 of the lower rotor 16 in the same manner as described above.
The material is deposited within the material to form a deposition bed 28, and then, while the subsequent material is transferred on the deposition bed 28, a centrifugal force is applied to the material and the material is discharged from the lower rotor 16 in the direction of the arrow 2. Ru. After colliding with the annular outer plate 2b, the discharged raw material collects on the bottom plate 2C and forms an inclined sediment layer 29. Next, the following raw material collides with the inclined surface 29' of the inclined pile layer 29, where it is crushed and sized, and moves upward on the inclined surface 29'.

On the other hand, the raw material having kinetic energy released from the upper stage rotor in a direction opposite to the direction in which the raw material is discharged collides head-on (countercurrently) at the terminal position of the inclined pile layer 29, and crushing and grading are performed again.

Furthermore, in the process of flowing down the inclined surface 29' of the inclined accumulation layer 29, the raw materials collided at the above position are repeatedly collided with the following raw materials and fall through the central opening 6 from the lower end of the inclined surface 29'. and is discharged from the discharge port 5.

In addition, in FIG. 3, a collision plate (repulsion plate) 30 is provided in an inclined shape instead of forming the inclined surface 29' of the raw material.

Furthermore, although the upper half of the annular outer plate 2b has a circular arc shape, the circular arc may be a straight line as shown by the imaginary line in FIG.

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

Inside the annular crushing chamber of the housing, two rotors are arranged vertically that apply centrifugal force to the raw material input from the center of the top and discharge it horizontally in the radial direction, and the upper and lower rotors are rotated in different directions. , an inclined surface is formed in the annular crushing chamber at a position facing the lower rotor, so that the raw material discharged from the lower rotor and the raw material discharged from the upper rotor collide head-on (countercurrent); The raw material discharged from the rotor collides with the inclined surface to be crushed and sized, and after the collision, in the process of moving upward on the inclined surface, it collides again with the raw material discharged from the upper rotor. Since this collision is a head-on collision, the crushing efficiency can be significantly increased.

In addition, since the head-on collision occurs at the end of the slope, the material after the collision loses its kinetic energy and moves down the slope, causing repeated collisions with the following materials, resulting in further crushing and Sorting is performed.

Furthermore, since the raw material flowing upward and the raw material flowing downward collide countercurrently, the airborne scattering of the raw material flowing upward is greatly reduced, making it possible to obtain a stable product 71 with no dispersion. At the same time, there is less wear on the side walls and large plates.

In addition, by forming the inclined surface by depositing raw materials,
There is no wear on the inclined surface.

Furthermore, by utilizing the collision plate with inclined surfaces arranged at an angle, a great crushing effect can be obtained.

Furthermore, since the annular outer plate of the annular crushing chamber facing the upper rotor is formed into an arcuate surface, the raw material that collides with the arcuate surface flows downward, increasing the chance of collision with the upwardly flowing raw material.

[Brief explanation of drawings]

Fig. 1 is a vertical cross-sectional view showing one embodiment of the vertical impact crusher of the present invention, Fig. 2 is a view taken along the line A-A in Fig. 1, and Fig. 3 is another embodiment of the present invention. 4 and 5 are longitudinal cross-sectional views of main parts showing
The figure is a longitudinal sectional view showing a conventional example. 1... Housing 2... Annular crushing chamber 7... Upper rotor 16... Lower rotor 29'... Inclined surface 30... collision plate

Claims (4)

[Claims] (1) Inside the annular crushing chamber of the housing, two rotors are arranged vertically that apply centrifugal force to the raw material input from the center of the top and release it horizontally in the radial direction, and the upper and lower rotors are moved in different directions. The annular crushing chamber is rotated, and an inclined surface is formed in the annular crushing chamber at a position facing the lower rotor, so that the raw material discharged from the lower rotor and the raw material discharged from the upper rotor collide head-on. Vertical impact type crusher. (2) The vertical impact crusher according to claim 1, wherein the inclined surface is formed by depositing raw materials. (3) The vertical impact crusher according to claim 2, wherein the inclined surface utilizes the surface of an inclined collision plate. (4) The vertical impact crusher according to claim 1, 2 or 3, wherein the annular outer plate of the annular crushing chamber at a position facing the upper rotor has an arcuate surface.