JPH0331407Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" This invention relates to an impact type crusher, and particularly relates to an impact type crusher for crushing, for example, raw stone to a desired particle size.

"Prior Art" Figures 6 to 8 show the conventional impact type crusher which is the background of this invention, and Figures 6 and 7 show different types of impact type crushers 1 and 10, respectively.
FIG. 8 is a partially cutaway plan view of the conventional device shown in FIG. 7.

Conventionally, this type of impact crusher has typically been of the type with the rotor shaft 6 horizontal as shown in FIG. A type in which the rotor shaft 16 is vertical is known. That is, in the former type of device, a rotating rotor 4 having a plurality of striking elements 2 is used.
is rotated around a rotor shaft 6 held horizontally, and raw ore (not shown) supplied into the crushing chamber 9 from a raw material supply port 8 provided above the side wall of the casing 3 collides with the striker 2. I was letting it happen. and,
In this crusher 1, the raw stone thrown away by this collision is crushed, for example, by the liner 5a of the first repulsion plate 5 provided above the rotating rotor 4, and then by the liner 5a of the second repulsion plate 7. 7a and a liner 3a attached to the casing 3, etc., to further crush the raw stone into fine pieces, and the impact from these liners and striking elements causes the raw stone to be crushed. The movement locus A of such a rough stone is shown by a bold line arrow in FIG.

On the other hand, in the latter type of device (FIG. 7), a rotating rotor 14 having a plurality of striking elements 12 is rotated around a vertically held rotor shaft 16, and a portion immediately above and approximately in the center of the rotating rotor 14 rotating in a horizontal direction is rotated. A raw stone (not shown) supplied into the crushing chamber 19 from a raw material supply port 18 provided in the crushing chamber 19 was made to collide with the striking member 12 . Then, in this crusher 10, the raw stone thrown away by this collision is made to collide with a fixed repulsion plate 24a disposed around the entire inner surface of the side wall of the casing 24, facing the outer peripheral edge of the rotating rotor 14, for example. , similar to the former type of equipment, the rough stone was crushed by impact from these fixed repulsion plates and striking elements. The movement locus B of the raw stone crushed in this way is shown by thick arrows in FIGS. 7 and 8.

``The problem that the invention attempts to solve'' In the former type of device, as shown in Figure 6,
Compared to the first repulsion plate 5, the second repulsion plate 7 is provided diagonally rearward away from directly above the rotating rotor 4. By the way, in general, when a rough stone is crushed by a collision, the repulsion coefficient of the rough stone approaches 0, so for example, the rough stone that is crushed by colliding with the second repulsion plate 7 is almost vertically moved by gravity. Fall. Therefore, the rough stone that falls from the second repulsion plate 7 arranged as described above cannot collide with the striker 2 and then repeat the collision with the second repulsion plate 7, and is not moved. As shown in trajectory A (FIG. 6), the number of collisions of the rough stone with the second repulsion plate 7 is drastically reduced compared to the number of collisions with the first repulsion plate 5. Therefore,
It is also conceivable to increase the circumferential speed of the rotating rotor 4 to increase the number of collisions of the rough stone at the first repulsion plate 5, but in this type of device, as mentioned above, the part subjected to crushing is rotated. In the rotor 4, it is mainly only a part of the entire circumference, that is, a part corresponding to the first repulsion plate 5, and not only can it not be expected to have much effect, but also the striking elements 12, liners 3a, 5a, etc. A problem arose in that wear increased on parts such as 7a.

On the other hand, in the latter type of device, the raw stone thrown off by the impact of the striker 12 is sent to the casing 24.
A fixed repulsion plate 24a provided all around the inner surface of the side wall of
Since it collides with the outer periphery of the rotor 14, almost the entire circumference of the rotor 14 can be used for crushing the raw ore, which is an improvement over the former type in terms of utilization of the outer periphery of the rotor 14. 7, Figure 8)
As can be seen from the figure, it is thought that the number of collisions of the raw stone with the fixed repulsion plate 24a is approximately only once. Therefore, this latter type of impact crusher still suffers from the same problems as the former type of impact crusher.

``Purpose of the invention'' Therefore, the main purpose of this invention is to provide an impact crusher that can perform crushing efficiently without increasing the circumferential speed of the rotor by increasing the number of collisions of rough stones. be.

"Means for Solving the Problems" In order to achieve the above object, the main means adopted by this invention is to introduce the raw ore into a rotating rotor that has a vertical axis as its center of rotation and has a plurality of strikers, and In an impact type crusher that crushes the raw ore by repeatedly colliding the raw ore with a repulsion plate provided near the rotating rotor and the striking member, the repulsion plate is provided directly above the rotating rotor, and the impacting member This point is formed on the top surface of the rotor.

"Operation" When the raw stone is supplied from the raw material supply port, it collides with the striker formed on the upper surface of the rotating rotor, and is thrown up by the repulsion plate provided directly above the rotating rotor. When the thrown ore hits this repulsion plate, a part of the ore is crushed, but
While the raw stone exists within the circumference of the rotating rotor, collision and crushing are repeated between the upper and lower portions of the striking element and the repulsion plate over substantially the entire circumference of the rotating rotor. As the rough stone progresses to crushing and is ejected outside the rotating rotor, the rough stone eventually collides with the fixed repulsion plate and falls.

``Effects of the invention'' According to this invention, the circumferential speed of the rotor can be lowered by the increase in the number of collisions and crushing of rough stones, which improves the efficiency of crushing processing and sufficiently suppresses abnormal wear of the striker and repulsion plate. I can do it.

Furthermore, since the entire upper surface of the rotating rotor can correspond to the repulsion plate, occurrence of uneven wear can be prevented.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

``Example'' Figures 1 to 3 show an embodiment of the device of this invention, Figure 1 is a side sectional view thereof, and Figure 2 is a partially cutaway plan view of the embodiment device shown in Figure 1. FIG. 3 is a sectional view taken along the - arrow in FIG. 2. In addition,
Elements common to those of the conventional impact crusher shown in FIGS. 7 and 8 will be described using the same reference numerals.

In FIG. 1, the impact crusher 10' includes a crushing chamber 19 formed by a casing 24 placed on a pedestal 25 and a lid 23 of the casing 24.
It is equipped with In addition, a raw material supply port 18 for supplying rough stone (not shown) to the crushing chamber 19 from above is formed at approximately the center of the lid 23, as shown by arrow C. A hopper 27 is attached. Further, the raw stone crushed in the crushing chamber 19 is placed on the pedestal 25 as indicated by the arrow D.
As shown in the figure, a discharge port 25a is formed for dropping the liquid downward.

A rotor shaft 16 that is vertically and rotatably supported by a bearing box 17 fixed to the upper surface of the pedestal 25 is disposed approximately in the center of the crushing chamber 19 . The lower end 16a of this rotor shaft 16 is connected to the frame 2.
A V-pulley 26 driven by a drive device (not shown) disposed at a predetermined location is attached to the lower end 16a of the V-pulley 26 inserted into the V pulley 26.

On the other hand, a disc-shaped rotating rotor 14 is attached to the upper end 16b of the rotor shaft 16 located approximately at the center of the crushing chamber 19, and rotates approximately horizontally around the rotor shaft 16. . The diameter of the rotating rotor 14 is determined by the outer circumferential edge of the rotating rotor 14 and the fixed repulsion plate 24a located opposite the outer circumferential edge and arranged around the entire side wall of the casing 24.
The size is set to provide an appropriate distance between the two.

As can be seen from FIG. 2, on the upper surface of the rotating rotor 14, there are four
A number of striking elements 112 are attached. And the striking surface 112a of each striking element 112
is formed along the radial direction of the rotating rotor 14, and is oriented in the direction in which the rotating rotor 14 rotates (FIG. 2: arrow E).

On the other hand, directly above the rotating rotor 14, that is, the lid 2
3, there are relatively long repulsion plates 28a whose tips extend toward the vicinity of the periphery of the raw material supply port 18, and which are formed so as to surround the raw material supply port 18 at regular intervals. A short repulsion plate 28b is attached. These long and short repulsion plates 28a and 28b intersect at a constant angle with respect to the radial direction of the rotating rotor 14, and repel the ore bounced off by the rotating striker 112 to the inside of the rotating rotor 14. It is set at an angle.

Note that the striking surface 112a of the striking element 112 has a third
As shown, it is tilted slightly upward. This is because the rough stone that collides with the striking surface 112a of the striking element 112 is thrown upward diagonally, and strikes the upper repulsion plate 28a while drawing a predetermined trajectory F, and this is repeated several times. .

Next, the impact type crusher 1 configured in this way will be explained.
The function of 0' will be explained. First, in Fig. 1, raw stone is put into the hopper 27 in the direction of arrow C,
The raw material is supplied from the raw material supply port 18 to the crushing chamber 19 . After the supplied rough stone falls into the center of the rotating rotor 14,
It is dispersed in the outer circumferential direction of the rotating rotor 14 by centrifugal force. At this time, the rough stone is alternately struck by the striker 112 on the upper surface of the rotating rotor 14 and the long and short repelling plates 28a and 28b located directly above the rotating rotor 14. and 28b and the lower striker 112
Impact crushing of the rough stone is repeated between the two. When the crushed ore is ejected from the rotating rotor 14, it collides with the liner 24a of the casing 24 and falls in the direction of arrow D. The movement trajectory G of the rough stone in the crushing chamber 19 is shown in FIG.

In addition, according to such a configuration, the casing 2
By interposing a shim, a spacer, etc. between the upper end of 4 and the lid 23, the vertical distance between the striking element and the repulsion plate can be easily changed. Further, by changing this distance using a hydraulic cylinder or the like, the number of collisions for impact crushing the raw stone can be adjusted as appropriate even during operation.

4 and 5 show other embodiments of the device of this invention, FIG. 4 is a side sectional view thereof, and FIG.
FIG. 2 is a partially cutaway plan view of the example device shown in the figure. In this example device, compared to the example devices shown in FIGS. 1 to 3, the rotating rotor 114 of the impact crusher 10'' on which the impactor 112' is mounted is formed into a conical shape. corresponding to the lid 12
3 is also formed into an inverted conical recess with an inclined inner surface. Therefore, the repulsion plate 128 formed on the inner surface of the lid 123 is inclined along the slope of the lid 123. In other words, the repelling plate 128 and the striking element 1
The number of collisions can be adjusted depending on the angle of inclination of 12'. Note that the crushing chamber 19 of this embodiment device
The motion locus H of the rough stone is shown in FIG. It will be easily understood that even the device of this embodiment, which is different in this respect, can have the same advantages and effects as the device of the above-described embodiment.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the device of this invention, FIG. 1 is a side sectional view thereof, FIG. 2 is a partially cutaway plan view of the embodiment device shown in FIG. 1, and FIG. The figure is a sectional view taken along the - arrow in FIG. 2. 4 and 5 show another embodiment of the device of this invention, FIG. 4 being a side view thereof, and FIG. 5 being a partially cutaway plan view of the embodiment device shown in FIG. 4. 6th
Figures 8 to 8 show the conventional impact type crusher which is the background of this invention, Figures 6 and 7 are side sectional views of different types of impact type crushers, and Figure 8 is the side sectional view of the different types of impact type crushers. FIG. 2 is a partially cutaway plan view of a conventional device in FIG. Explanation of symbols, 10', 10''...Impact crusher,
14... Rotating rotor, 18... Raw material supply port, 23
...Lid, 24...Casing, 28a, 28b,
128... Repulsion board, 112, 112'... Striker.

Claims (1)

[Claims for Utility Model Registration] A rough stone is put into a rotating rotor that has a vertical axis as its center of rotation and has a plurality of striking elements, and the rough stone repeatedly collides with a repulsion plate provided near the rotating rotor and the striking elements. An impact type crusher for crushing this raw ore, wherein the repulsion plate is provided directly above the rotating rotor, and the impactor is formed on the upper surface of the rotating rotor.