JPH0420506Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a striker for an impact crusher that crushes rocks, ores, etc. by impact, and is particularly designed to reduce wear on the striking part and to reduce replacement work. This invention relates to an improvement in the mounting structure of a joint stand that does not cause any trouble.

[Prior art]

A conventional impact crusher is constructed as shown in a schematic cross-sectional view in FIG.

For example, raw ore is fed into the crushing chamber 3 from the raw material supply port 2 installed at the upper side of the impact crusher 1, and the raw ore is fed into the crushing chamber 3 by a blower fixed to the outer periphery of a rotating rotor 5 that rotates around a main shaft 4. Shattered by impact by 6.

The raw stone that is thrown off by the rotating rotor 5 collides with the liner 7a attached to the first repulsion plate 7 provided at the top of the crushing chamber 3 and is crushed.
The rebounding raw stone is crushed by impact by the next batter 6 which rotates further. Then, the thrown ore is crushed even more finely by the liner 8a attached to the second repulsion plate 8 provided at the upper part of the crushing chamber 3.

In the case of such a conventional impact type crusher, the impactor 6 formed as one piece is generally made of a hard metal material such as high chromium cast iron, high manganese cast steel, or chromium molybdenum cast steel.

However, with such a striker 6, since the supplied raw stone to be crushed also contains hard minerals, etc., if impact is repeated between it and the hard supplied raw stone, as shown in FIG. It will gradually wear out like this.

That is, as shown in FIG. 7A, the tip portion 6a of the striker 6 whose initial shape was as shown by the solid line.
gradually wears out and deforms into a rounded shape, as shown by the plurality of broken lines in FIG. 7B.

At this time, the surface facing the side casing liner forming the side wall of the crushing chamber 3 is also worn out at the same time.

In the conventional impact type crusher, from the viewpoint that it is uneconomical to discard the impactor 6 in this state, the impactor 6 is turned over as shown in Fig. 7C, and the
Use continues until wear progresses as shown by the broken line in Figure D.

In this way, in conventional impact crushers, the impactor did not have sufficient wear resistance, so when the impactor wears and its tip becomes rounded, it becomes difficult for the object to be crushed to collide head-on. However, the disadvantages were that the crushing capacity decreased and the cost for replacement increased significantly. In addition, the frequency of replacement, including turning the front and back as described above, is important, for example, when crushing rocks for aggregate.
The work of replacing the hammer, which weighs approximately 100 kg, once every 1.5 to 3 months was extremely demanding.

In order to reduce the wear of such a striker,
It is conceivable to attach a piece of hard carbide material to the tip of the striker via a detachable joint. The joining table is for attaching and detaching the piece of carbide material to the striking element.

[Problem that the invention attempts to solve]

The above-mentioned joint table is attached to the striker using attachment members such as bolts or wedges, but as a result of collision with the raw material, the side surface of the striker facing the side casing liner wears out, and the wear extends to the attachment member. This may cause problems such as the mounting member becoming loose or becoming unable to be removed from the striker.

Therefore, the purpose of the present invention is to prevent the wear from reaching the mounting members of the joint table even if they wear out.
Therefore, it is an object of the present invention to provide a striker for an impact type crusher that does not cause difficulty in attaching and detaching a joint stand.

[Means for solving problems]

The main means adopted by the present invention to achieve the above object are: a rotating rotor that rotates around a main shaft provided inside a casing; The method comprises a plurality of striking elements and a repulsion plate provided at an appropriate distance around the rotating rotor, and causes the raw material splashed by the tip of the rotating striking element to collide with the tip of the striking element and the repulsion plate. In order to crush the
In the striker for an impact crusher in which a piece of carbide material is bonded to the tip of the striker via a bonding platform that is detachably attached to the tip of the striking device, a mounting member that attaches the bonding platform at the end of the striker to the striker. A striker for an impact type crusher according to a point in which the side end of the striker is provided further inward from a surface inclined inwardly by 15 degrees with respect to the side casing liner surface from the end of the side end of the striker on the joint surface side to the joint table. It is.

[Effect]

The piece of carbide material at the tip of the striker is worn out (joint table)
Even if wear extends to the joint surface of the joint base, the side surface of the joint base and the striker should be kept at an angle of 15° to the side casing liner surface from the side end of the joint face of the side end of the striker to the joint base.
Since the mounting member provided inside this line is not worn further than the surface inclined inward, the mounting member provided inside this line is prevented from being worn.

〔Example〕

Next, embodiments embodying the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. FIG. 1 shows a striking device according to an embodiment of the present invention, and FIG. 1A is a plan view thereof, and FIG.
is a front view thereof, and figure c is a side sectional view thereof.

It should be noted that the following embodiments are merely examples embodying the present invention, and are not intended to limit the technical scope of the present invention.

In FIGS. 1a, b, and c, the striker 10 includes a striker main body 11, a plurality of joint stands 14, which are attached to spigot parts 13, 13, . 14, ... and each joining table 1
4, 14, . . ., which are fixed by brazing, respectively, and each joint table 14, 14, .
7, 17, . . . are removably fixed to the striking element body 11.

The carbide chip 15 is brazed to the joint base 14 using a sandwich solder (a cladding material in which a copper plate is sandwiched between two silver solders).

The carbide chip 15 is an example of a piece of carbide material, and the pilot parts 13, 13, . . . prevent the joint bases 14, 14, . This is to prevent you from getting infected. An example of the above-mentioned spigot part is shown in FIG. 5, for example.

The carbide chips 15, 15, . . . and the joining tables 14, 14, .
It is divided into a plurality of parts in the radial direction and in the direction of its main axis 4. Naturally, the rotating rotor 5 can also be divided in the radial direction. Such division may be omitted if necessary, or may be divided only in the direction of the main shaft 4 or only in the radial direction. Furthermore, a plurality of carbide chips 15 may be attached to one joining table 14.

In the example shown in FIG. 1, one cemented carbide chip corresponds to one joining table.

The bolt 17 connects the joint base 14 to the striker body 1.
As shown in FIG. It is provided further inward than an inclined surface 21 which is inclined inward at 15 degrees with respect to the surface of the side casing liner 9 from an end 20 on the side of the joint surface 19 of the carbide tip 15 to the table 14.

Fig. 2 is a graph of the wear depth h on the side surface of the striker when the peripheral speed of the rotating rotor 5 is 28 m/s and the rock throughput, that is, the operating time of the crusher is increased. As can be seen from the figure, the wear depth becomes constant at around 25 mm and has not progressed beyond that point, and the angle θ between the initial side surface (parallel to the side casing liner) and the worn side surface converges to 15°. However, it was found that it remained constant and did not advance any further, regardless of the material of the striking element 6b. This shows that if a mounting member such as a bolt is provided inside this inclined surface, wear of the mounting member can be prevented.

However, if the use continues, the wear of the carbide tip will progress to the inclined surface 21' as shown in Figures 3a and d, so the mounting member should be designed in consideration of this progression of wear of the carbide tip. It is desirable to set the position of

In the example shown in FIG. 1a, the head 18 of the bolt 17, which is the mounting member, is
Since the head 18 of the bolt 17 is provided on the inner side of the inclined surface 21 starting from , almost no wear occurs on the head 18 of the bolt 17 until the wear surface of the carbide tip 15 reaches the outer peripheral end 20 of the joint surface.

In the embodiment shown in FIG. 1a, the head 18 of the bolt 17 is provided almost in contact with the inclined surface 21, so that the wear of the carbide tip 15 can be prevented before reaching the end 20 on the side of the original joint surface. It is desirable to replace the cemented carbide chip 15 together with the joining table 14, or to reinstall it by reversing it vertically or horizontally.

In the example shown in FIG. 1 above, the axial widths of the carbide tip 15 and the rotating rotor 5 of the welding table 14 are all constant, but in the striker 10a shown in FIG. The outer (most side) carbide chip 15a and bonding table 14a are connected to other carbide chips 15.
a' and the joint base 14a', thereby making it possible to successfully place the bolt 17 further inside the rotor 5 than in the case shown in FIG.

Further, in the examples shown in FIGS. 3d, e, and f, from the same point of view, only the side end joint base 14b is connected to the other joint base 1.
The carbide chip 15b is made longer than 4b' in the axial direction of the rotating rotor, and is divided into two parts.
15b is brazed.

Furthermore, in the example shown in FIGS. 3g and 3h, the joining table 14c at the sidemost end where the strongest force is applied is made vertically long,
It is fixed with two bolts 17c, 17c.

FIGS. 4a to 4o show various modifications of the mounting member.

In the case shown in FIG. 4a, a bolt 17d is formed on the back side of the joint base 14d, and the striker body 1 is connected between the nut 24 screwed onto the bolt 17d and the joint base 14d.
1d, and in this case, the nut 24 corresponds to the mounting member.

In the mounting structure shown in FIG. 4b, the mounting member is the same as that shown in FIG. 4a, but the spigot part 13d is replaced by 13e. A modification of such a spigot part is shown in FIG.

The one shown in FIG. 4c is similar to that shown in FIG.
However, the bolt 17f is attached to the striker body 11.
keys 25, 25 are driven into the back surface of the joint base 14f to prevent rotation of the joint base 14f. By pressing a wedge 28 pressed by a wedge member 27 drawn by a bolt 26 against the lower surface of the joint base 14f, the joint base 14f is fixed to the striker body 11f. The attached state of the joining table 14f and the wedge member 27 is shown in FIG. 4d. Here bolt 17
f and 26 correspond to the mounting members.

In the case shown in FIG. 4e, a spherical part 29 is formed on the back surface of the joint table 14g, and a wedge member 31 moved by a bolt 30 presses a pressing member 32 against the spherical part 29. is fixed to the striking element main body 11g.

In the example shown in FIG. 4e, the bolt 30 and the spherical part 2
9 corresponds to the mounting member.

In the example shown in FIG. 4g, the left and right side parts (not shown) of the wedge member 34 bite into the hexagonal part 33 on the back surface of the joint base 14h, and the joint base 14h is pushed into the striker body 11h.
The bolt 17h for attaching the wedge member 35 for moving the wedge member 34 to the striker body 11h corresponds to the attachment member.

Further, in FIG. 4h, the welding base 14i is fixed to the striking body 11i by inserting a wedge 37 into the tapered surface 36 formed on the back surface of the welding base 14i, and the wedge member 38 that presses the wedge 37 is The bolt 17i attached to the striker body 11i corresponds to the attachment member.

Furthermore, in the example shown in FIG. 4i, the joining table 14j
4 bolt holes 3 as shown in Figure 4j on the back side of the
9 is provided, and the bolts 17j installed in the two bolt holes on the center side of the rotating rotor 5 correspond to the mounting members.

Furthermore, in the example shown in FIG. 4k, the joining table k
A bolt hole 40 for inserting a bolt 17k is formed on the joint surface side of the bolt 14k, and the joint base 14k is fixed to the striker main body 11k by the bolt 17k inserted from the carbide tip 15k side, and the bolt 17k is the mounting member. Applies to. In addition, the joining table 14 in this case
A view of the carbide chip 15k seen from the back is shown in FIG. 41, and a view of the carbide chip 15k seen from the front is shown in FIG. 4m.

[Effect of idea]

As described above, the present invention includes a rotating rotor that rotates around a main shaft provided inside a casing, a plurality of strikers fixed to the outer periphery of the rotating rotor, and a plurality of strikers arranged around the rotating rotor. A repulsion plate is provided at a distance, and is detachably attached to the tip of the rotating striker so that the raw material splashed by the tip of the rotating striker collides with the tip of the striker and the repulsion plate and is crushed. In a striker for an impact type crusher in which a piece of carbide material is joined to the tip of the striker via a joining base, the attachment member for attaching the joint base at the end of the striker to the striker is connected to the impact at the side end. This is a striker for an impact type crusher, which is characterized in that it is provided further inward than a surface that is inclined 15 degrees inward with respect to the side casing liner surface from the end of the joint surface of the child to the joint table. Even if the wear of the carbide material piece at the tip extends to the joint surface to the joint table, the mounting member of the joint table should be attached to the surface (wearing Since it is mounted further inside than the limit), it is possible to avoid inconveniences such as the mounting member becoming worn and loosening, causing the joint base to come off or making it difficult to remove the joint base.

[Brief explanation of drawings]

Figure 1 shows a striking device according to an embodiment of the present invention; Figure a is a plan view thereof, Figure b is a front view thereof, Figure c is a side sectional view thereof, and Figure 2 is a rock throughput. Graphs showing the relationship between the abrasion depth and the abrasion angle of the top of the striking element, and Fig. 3 a, b, and c are corresponding views of Fig. 1 a, b, and c for the striking element according to other embodiments, and the same. Figures d, e, and f are views corresponding to Figure 1 a, b, and c regarding a striker according to another embodiment;
Fig. 1a and c of a striking device according to further another embodiment;
The corresponding drawings, Fig. 4, show modified examples of the mounting member. Figure 1 is a back view of the joint table and wedge member shown in Figure c, Figure f is a perspective view of the joint table shown in Figure e, Figure j is a rear view of the joint table shown in Figure i, Figure 1 is a rear view of the joint table shown in Figure K Rear view of the joint table shown,
Figure m is a front view of the carbide chip shown in figure k;
The figure is a perspective view showing various modifications of the spigot part formed on the back of the joint table, Figure 6 is a side sectional view showing the overall structure of a conventional impact crusher, and Figure 7 is a conventional impactor wear-out. FIG. 3 is a side view showing the situation. Explanation of symbols, 10...Batterer, 11...Batterer body, 14...Joining stand, 15...Carbide chip (carbide material piece), 19...Jointing surface, 20...Jointing surface side end , 17, 24, 26, 29, 30... mounting member, 21... inclined surface.

Claims (1)

[Claims for Utility Model Registration] A rotating rotor that rotates around a main shaft provided inside a casing, a plurality of strikers fixed to the outer periphery of the rotating rotor, and a suitable distance around the rotating rotor. A repulsion plate is provided at a distance from the repulsion plate, and the repulsion plate is detachably attached to the tip of the rotating striker so that the raw material splashed by the tip of the rotating striker collides with the tip of the striker and the repulsion plate and is crushed. In a striker for an impact type crusher in which a piece of carbide material is joined to the tip of the striker via a joint stand, a mounting member for attaching the joint stand at the end of the striker side to the striker is attached to the striker at the side end. From the end of the joint surface to the joint table to the side casing liner surface
A striker for an impact type crusher characterized by being provided further inward than the surface tilted inward at 15 degrees.