JPH0213084Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a crusher, and is particularly used for crushing or sizing (cutting corners) raw raw materials such as rocks and ores to a desired particle size for making sand. Concerning a crusher useful for

BACKGROUND ART Conventionally, this type of crusher as shown in FIGS. 4 to 6 has been known. Such an impact type crusher is disclosed in Japanese Patent Publication No. 53-33785.

That is, in FIG. 6, inside a rotor 1 (see FIG. 4) mounted on a vertical shaft via a bearing 2 (see FIG. 4), there is a central distributor provided at the center of the rotor 1. Wing 2 rotating around 20 as the center of rotation
1, 22, and 25, and a tip wing 24 having, for example, a carbide tip 24a attached thereto, is integrally fixed to the tip of the wing 25.

Therefore, the raw material ore (hereinafter referred to as raw material) fed from the raw material supply device 11 shown in FIG. From the blades 24 it is sent to the outlet 19 (see FIG. 5), from where it is discharged to the outside of the rotor 1.

As shown in FIG. 4, the discharged raw material collides with a dead stock 15 (or a disposed ring liner 16 (double-dashed line)) formed as a collision part inside the housing 8 that houses the rotor 1. .

The type that causes the raw material to collide with the dead stock 15 is used for sizing the raw material (grain shape correction), and the type that collides the raw material with the ring liner 16 is used for crushing the raw material.

In such an impact type crusher, the blades 21, 22, 25, etc. arranged on the rotor 1 are
It is provided in a slightly curved manner so as to surround a central distributor 20 (see FIG. 4) which is the center of the. This is because the input raw material passes through each of the blades 21, 22, and 25 and reaches the tip blade 24, and is deposited on this curved part, forming a so-called dead stock 23, which causes the side wall 18 of the rotor 1 to become a raw material. This is intended to protect against wear caused by collisions.

In the rotor 1 shown in FIG. 6, two outlets 19 are provided around the rotor 1, and in order to form two dead stocks 23 accordingly, each blade 21, 22, 25 and the tip blade 24 are provided along the circumferential direction of the rotor 1 at an angle of about 180°.

Problems with the Prior Art By the way, in such a conventional impact type crusher, as can be seen from FIG. They are arranged so as to be brought toward the same center (central distributor 20) and curved with a relatively small curvature.

This includes each wing 21, 22, 25 and the tip wing 24.
The aim is to minimize the amount of dead stock received by the rotor 1, for example, to reduce the weight of the rotor 1 and to minimize the load on the rotor 1, which rotates at high speed.

However, in this case, the blades 21 and 22 are specially provided between the rotor side wall 18 and the center of the rotor, which complicates the interior of the rotor 1, and even if the amount of dead stock can be reduced to some extent, the blades 21 and 22
22 does not significantly reduce the weight of the rotor 1 and cannot be said to be effective in terms of weight reduction.

On the other hand, in the dead stock 23 where the particle size of the raw material is mainly set to 20 to 80 mm, the angle of repose of the powder or granule is determined by the relationship with the particle size, so the amount of dead stock can be adjusted depending on the raw material to be supplied. It is desirable to do so. This is because if the amount of dead stock decreases depending on the particle size of the raw material, the tip blade 24 will be exposed and wear will become severe.

Purpose of the invention Therefore, the main purpose of the invention is to provide a crusher that simplifies the interior of the rotor and reduces the weight of the rotor.

Another object of this invention is to provide a crusher that prevents the tip blade receiving dead stock from wearing out due to fluctuations in dead stock, thereby extending the life of the tip blade and the rotor outlet.

Composition of the invention In order to achieve the above object, the main means adopted by this invention is to deposit the material to be crushed, which has been put into a rotor rotating at high speed, near the outlet of the rotating rotor, while centrifuging the material to be crushed. In a crusher that crushes the material by ejecting it from the outlet of the rotating rotor and colliding with a collision surface around the rotating rotor, the material is fixed to the inner side wall of the rotating rotor and cooperates with this side wall to create a dead stock of the material to be crushed. The present invention is characterized in that a partition plate is provided to partition the inside of the rotor to form a section, and a layer thickness adjusting means for adjusting the layer thickness of the dead stock is provided on the partition plate.

Function: A partition plate is provided on the rotor side wall, which curves with a relatively large curvature, to partition the inside of the rotor.
A deep recess is formed by the rotor side wall and the partition plate. As a result, a relatively large amount of dead stock is deposited directly on the rotor side wall, protecting the rotor side wall, rotor outlet, etc. from wear due to collision with the raw material.

Furthermore, since the dead stock inside the rotor is formed by the rotor side wall and the partition plate, the conventionally required blades are no longer required.

Furthermore, since the amount of dead stock deposited is adjusted by the layer thickness adjusting means, an amount corresponding to fluctuations in dead stock can be ensured.

Effects of the invention According to this invention, the interior of the rotor can be simplified and the weight of the rotor can be reduced.

Further, according to this invention, it is possible to prevent wear caused by fluctuations in dead stock on the tip blade that receives dead stock, so that the life of the tip blade and the rotor outlet can be extended.

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.

Embodiment FIG. 1 is a schematic vertical sectional view of an impact crusher according to an embodiment of this invention, FIG. 2 is a plan view showing the internal structure of the rotating rotor in FIG. 1, and FIG.
It is an enlarged perspective view in the direction of the figure arrow.

Note that the following example is just one specific example of this invention, and the technical scope of this invention is not limited by this example.

In FIG. 1, the impact crusher 30 has a pedestal 3
The crushing chamber 31 is formed by a housing 34 placed on the housing 5 and a lid 33 of the housing 34. Almost at the center of the lid 33 is an arrow C.
As shown in FIG. 2, a raw material supply section 32 for supplying raw materials from above to the crushing chamber 31 is provided, and a hopper 36 is attached to this raw material supply section 32. Further, the pedestal 35 is formed with a discharge port 37 for dropping the raw material crushed in the crushing chamber 31 downward as shown by arrow D.

A rotor shaft 39 is disposed approximately in the center of the crushing chamber 31 and is vertically and rotatably supported by a bearing box 38 fixed to the upper surface of the pedestal 35. The lower end 39b of this rotor shaft 39
5, and a V-pulley 40 driven by a drive device (not shown) disposed at a predetermined location is attached to the lower end 39b.

On the other hand, a hollow cylindrical rotating rotor 41 is attached to the upper end 39a of the rotor shaft 39 located approximately at the center of the crushing chamber 31 and rotates approximately horizontally around the rotor shaft 39. .

A bracket 44 is formed on the inner surface of the side wall of the housing 34, corresponding to the height position of the raw material discharge port 43 of the rotating rotor 41. A large number of anvils 42 are attached around the anvil 41.

In this case, the rotating rotor 41 functions almost in the same way as the rotor 1 explained in FIGS. It emits in the opposite direction.

That is, as shown in FIG. 2, inside the rotating rotor 41, the raw material that has been introduced into the center of the rotating rotor 41 is distributed, for example, in the circumferential direction of the rotating rotor 41, as can be seen from the explanation of FIG. They are deposited as dead stocks 23' at suitable angles of 120°. As the rotor 41 rotates at high speed, the deposited raw material is discharged outward from three raw material discharge ports 43 formed on the circumferential side wall of the rotor 41 via the respective dead stocks 23'. become.

Inside the rotating rotor 41, partition plates 45 are installed to partition the inside of the rotating rotor 41 at an angle of about 120 degrees in the circumferential direction of the rotating rotor 41 in order to form each dead stock 23'. ing.

The partition plate 45 is fixed to an upstream end of a rotor side wall 46 that is divided into three parts along the circumference of the rotor 41 and each extends in an arc shape when viewed in the rotor rotation direction. It is set up so that it is oriented towards. In addition, the rotor side wall 46
A tip blade 47 having a carbide chip 50 attached to the tip is attached along the circumferential direction of the rotating rotor 41 at the downstream end when viewed in the rotor rotation direction, and a tip blade 47 is attached along the circumferential direction of the rotating rotor 41 . It forms part of 43. At this time, a large and sufficiently deep recess is formed inside the rotor side wall 46 in cooperation with the tip blade 47 and the partition plate 45.

As a result, the blades conventionally provided inside the rotor (FIG. 6) are no longer necessary, simplifying the structure and reducing the weight of the rotating rotor 41. Furthermore, the rotor side wall 46 and the partition plate 45 allow a large amount of dead stock 2 to be accommodated to fluctuations in dead stock.
3' is formed, and this large amount of dead stock 2
3' accumulates up to the tip of the tip blade 47 and protects the tip blade 47, raw material discharge port 43, etc. from wear due to collision of raw materials.

In this case, the amount of extension of the partition plate 45 toward the center of the rotor is such that the dead stock 23' deposited in the recess formed by the partition plate 45 and the rotor side wall 46 is sufficiently extended to the tip of the tip blade 47. It is set up so that it is accessible.

Further, here, the partition plate 45 is connected to the rotor side wall 46.
The case where the rotor 41 is attached along the radial direction of the rotating rotor 41 has been described. However, depending on the case, the partition plate 45 may be provided so as to be inclined inward or outward at an appropriate angle from the radial direction of the rotating rotor 41.

Next, as can be seen from FIG. 3, the partition plate 45 is equipped with an adjustment plate 51, which is an example of layer thickness adjustment means for the dead stock 23'. is partition plate 4
A long hole 52 is formed that extends along the radial direction (arrow A) of the rotating rotor 41 when the rotor 5 is attached to the rotating rotor 41 . In this case, the adjusting plate 51
A bolt 53 is slidably fastened to the partition plate 45 using the guide as a guide.

Therefore, by operating this adjustment plate 51, the amount of deposited material in the dead stock 23' is ensured as an amount that appropriately corresponds to the fluctuations in the dead stock 23', and the raw material is constantly supplied to the tip of the tip blade 47. can be deposited.

By the way, some of the raw materials forming a dead stock near the partition plate 45 near the center of the rotor do not face downstream (direction of arrow F) when viewed in the rotational direction of rotor 41 (arrow B). Rotating rotor 41
The gaps 49a and 49 formed between the partition plate 45 and the center of the rotor are swung out due to the high speed rotation of the
Through b and 49c, some flow out to the adjacent rotor side wall 46 and tip blade 47 on the upstream side (arrow E).

The raw material flowing out to the upstream side (arrow E) merges with a portion of other raw materials that are about to be deposited as dead stock near the rotor side wall 46 and tip blade 47 on the upstream side. Abrasion is severe at such confluence portions 48a, 48b, and 48c of raw materials.

Even in such a case, by operating the adjustment plate 51, the width of the gaps 49a, 49b, 49c formed between the partition plate 45 and the rotor center can be adjusted, and the passage through the gaps 49a, 49b, 49c. By reducing the amount of raw materials flowing out, it is possible to reduce wear occurring at the joining portion 48 of the raw materials.

Note that in the following embodiments, the rotating rotor 4
1, raw material discharge ports 43 are formed at three locations along the rotor periphery, and the rotor side wall 4
6. The case where the partition plate 45, tip blade 47, etc. are arranged at an angle of about 120 degrees in the rotor circumferential direction has been described. However, in addition to this, the number of raw material discharge ports may be increased to four or five locations along the circumferential direction of the rotating rotor. etc. are arranged at angles of approximately 90°, 72°, etc. in the rotor circumferential direction.

Further, if necessary, the top cover of the rotating rotor is provided in a removable manner to improve maintainability.

[Brief explanation of the drawing]

Fig. 1 is a schematic vertical sectional view of an impact crusher according to an embodiment of the invention, Fig. 2 is a plan view showing the internal structure of the rotating rotor in Fig.
Figure 4 is an enlarged perspective view in the direction of the arrows, Figure 4 is a schematic longitudinal sectional view of the impact crusher that is the background of this invention, Figure 5 is the
FIG. 6 is a schematic plan view showing the internal structure of the rotor shown in FIG. 4. FIG. Explanation of symbols, 30...Impact crusher, 41...
Rotating rotor, 45...partition plate, 46...rotor side wall, 47...tip blade, 51...adjustment plate.

Claims (1)

[Claims for Utility Model Registration] 1. The object to be crushed is deposited in the vicinity of the outlet of the rotor rotating at high speed, while the object to be crushed is discharged from the outlet of the rotor by centrifugal force, In a crusher that crushes the material by colliding it with a collision surface around a rotating rotor, the material is fixed to the inner side wall of the rotating rotor, and is configured to move inside the rotating rotor in order to form a dead stock portion of the material to be crushed in cooperation with the side wall. A crusher comprising a partition plate for partitioning, and a layer thickness adjusting means for adjusting the layer thickness of the dead stock on the partition plate. 2. The crusher according to claim 1, wherein the partition plate extends along the radial direction of the rotating rotor.