JP2500716Y2 - Hard type impact crusher - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a vertical impact type crusher for crushing and correcting the grain shape of rocks, ores, etc., and particularly, to reduce wear of the raw material outlet of the rotor. The present invention relates to a vertical type impact crusher.

[Prior art]

FIGS. 3 to 6 (b) show an example of a vertical impact type crusher which is the background of the present invention.

As shown in FIG. 3, the vertical impact type crusher 1 is provided with a rotor 2 mounted on a vertical shaft serving as a rotary drive shaft via a bearing 38. A hopper 11 is provided at a central portion above the rotor 2 of the apparatus main body through a raw material supply device 10. An upper surface liner 3 and a lower surface liner 4 each having a predetermined thickness g ₃ are fixedly provided on the upper surface and the lower surface inside the rotor 2, respectively, as shown in FIG. , The central distributor 9 (3rd
(Fig.) Is fixed. Further, the blades 12, 13 and 14 are radially arranged at three positions at equal angles around the central distributor 9 (FIG. 5).

Then, the blades 12, 13 and 14 form a dead stock 15 of the raw material as shown in FIG.

Further, a hard tip 5 is integrally fixed to the tip of the blade 14 at the rotor outlet 16 in consideration of the wear resistance of this portion,
Further, a cemented carbide chip 21 having a higher hardness is embedded in the corner portion of the hard chip 5 (FIGS. 5 to 6 (b)). The hard tip 5 is provided on the blade 14 between the upper surface liner 3 and the lower surface liner 4, and the hard tip 5 is arranged in such a manner that a part of each of the upper surface liner 3 and the lower surface liner 4 interferes with the hard chip 5 without contact. It is set up.

Therefore, according to the vertical impact type crusher 1 configured as described above, as shown in FIG. 4, the raw material fed from the raw material supply device 10 into the rotor 2 rotating at high speed about the vertical axis is Then, the rotor 2 is guided by the upper surface liner 3 and the lower surface liner 4 by the centrifugal force caused by the rotation of the rotor 2 and discharged from the rotor outlet 16 through the dead stock 15 and the hard tip 5. Then, the discharged raw material collides with the anvil 17 or the dead ring (not shown) arranged at a predetermined interval along the circumference of the rotor 2 to crush or correct the grain shape.

[Problems to be solved by the device]

In the conventional vertical impact type crusher 1 as described above, the raw material charged in the rotor 2 rotating at high speed is guided to the rotor outlet 16 through the hard tip 5 by the upper surface liner 3 and the lower surface liner 4. However, such a rotor 2 is manufactured as a can-making product having a welded structure and, in addition, the above-mentioned blades are manufactured.
Since the hardfacing is applied to the welded portions of 12, 13 and 14 with the rotor top plate 7 and the rotor bottom plate 8 with a welding rod having wear resistance, the height dimension H in the rotor 2 (see FIG. 6 ( It is not possible to improve the dimensional accuracy of b)). In addition, since the upper surface liner 3 and the lower surface liner 4 are often made of cast iron and have not been machined to improve the dimensional accuracy, when the hard tip 5 is attached to the blade 14, the lower surface liner 4 is
A gap g ₂ between the (top liner 3) and the hard tip 5 (6th
(Corresponding to the D-D arrow portion in FIG. 9A) occurs. Therefore, a gap g ₁ (Figure 6 formed between the gap g ₂ through possible fine or slurry passes through the gap g ₂ is the rotor base plate 8 and (rotor top plate 7) and rigid tip 5 (a ) E-
In the lower gap portion 19 (corresponding to the arrow E portion) (upper gap portion 18),
As shown by the two-dot chain line arrow F in FIG. 6 (a), there was a case where the blade 14 was locally worn away and locally worn (the site B shown by the two-dot chain line in the figure). As a result, the rotor 2 becomes unbalanced, which may cause abnormal vibration.

Therefore, the purpose of the present invention is to make the rotor top plate 7
To prevent the fine particles or the slurry from flowing out into the gap between the lower surface of the rotor and / or the upper surface of the rotor bottom plate 8 and the hard tip 5, thereby preventing local wear of the rotor provided with the hard tip. The purpose is to provide a vertical impact-type crusher that can be used.

[Means for solving the problem]

In order to achieve the above-mentioned object, the main means adopted by the present invention is the gist of the invention, in which the raw material introduced into the rotor rotating at high speed around the vertical axis is rotated by the centrifugal force generated by the rotation of the rotor. In the hard impact type crusher which is guided along the upper surface liner and the lower surface liner of a predetermined thickness provided on the inner upper surface and the lower surface and discharges from the rotor outlet having a hard tip provided between the upper surface liner and the lower surface liner, A vertical type according to a point in which a blocking member is provided in a gap formed between the hard tip and the upper surface and / or the lower surface in the rotor in a front view of the rotor outlet to suppress the outflow of the raw material from the gap. It is an impact type crusher.

[Action]

According to the vertical impact type crusher according to the present invention, the dam member is provided in the gap formed between the hard chip and the upper surface and / or the lower surface of the rotor, and the raw material introduced into the rotor has the above gap. Since it is configured so as to prevent the material from flowing out of the gap, it is possible to reduce the amount of raw material flowing through the gap as much as possible, thereby preventing local wear of the rotor near the gap.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings to provide an understanding of the present invention. It should be noted that the embodiment described below is an example in which the present invention is embodied and does not limit the technical scope of the present invention.

Here, FIG. 1 is a plan sectional view partially showing the vicinity of a rotor outlet of a rotor of a vertical impact type crusher according to an embodiment of the present invention, and FIG. 2 is a view of the rotor as seen from an arrow A in FIG. It is a figure.

The elements common to those of the conventional vertical impact type crusher 1 shown in FIGS. 3 to 6B are designated by the same reference numerals and the detailed description thereof is omitted.

The vertical impact-type crusher according to the present embodiment has substantially the same basic structure as the conventional vertical impact-type crusher 1 described above, and has a structural difference from the conventional vertical impact-type crusher 1. As shown in FIGS. 1 and 2, when viewed from the front of the rotor outlet 16 (view A in FIG. 1), the lower surface of the rotor top plate 7 and the upper surface of the rotor top plate 8, in other words, the rotor 2 gap portion of the gap g ₁ formed between _a the upper and lower surfaces and hard chips 5 (corresponding to the upper gap 18 and lower gap portions 19 in a conventional rotor 2)
In addition, the damming member 20 is disposed so as to suppress the outflow of fine particles or slurry from the gap.

The dam stop member 20 is constructed in a plate shape having a bottom surface liner 3 _a and the upper surface liner 3 _a thickness g ₃ equivalent thickness g _3, and is configured to equivalent widths and front view the hard tip 3. The damming member 20 is fixed to the rotor bottom plate 8 and the blade 14 or the rotor top plate 7 and the blade 14, respectively. Therefore, since the blocking member 20 is provided, the bottom surface of the hard chip 5 and the rotor bottom plate are located near the rotor rotation center of the blocking member 20, as shown in the rotor bottom plate 8 of FIG. 1, for example. A damming space C is formed from the upper surface of 8, the side surface of the lower surface liner 4 _{a, and} the side surface of the blade 14. The damming space C is similarly formed on the lower surface of the rotor top plate 7, the side surface of the upper surface liner 3 _a , and the like.

Accordingly, the vertical impact crusher configured as described above, when turning on the raw material to the rotor 2 _a rotating at a high speed on the vertical axis, the raw material is along the upper surface liner 3 _a and a lower surface liner 4 _a Will be guided toward the rotor exit 16. At this time, fine or slurry contained in the raw material is partially rigid chip 5 and the top surface liner 3 _a or lower surface liner
It flows into the blocking space C through the gap g ₂ with 4 _a and is stored in the blocking space C. Thereby, since the damming space C is sealed, the subsequent fine particles or slurry are guided along the outer circumference of the damming space C, and the blade
Direct contact with 14 is suppressed. As a result, the local wear of the blade 14 as occurred in the past (Fig. 6 (b))
Part B) of can be prevented. As a result, without causing abnormal vibration due to unbalance of the rotor 2 _a, it is possible to extend the life of the rotor 2 _a.

In the above-described embodiment, the thickness of the blocking member 20 is set to be equal to the thickness g ₃ of the upper surface liner 3 _a and the lower surface liner 4 _a , but the thickness of the blocking member 20 is set to the thickness g _{3 of} each liner. It is more preferable to make it thicker, that is, to set the gap between the hard tip 5 and the blocking member 20 to be narrower than the gap g ₂ between the hard tip 5 and each liner. As a result, the fine particles or the slurry are guided to the damming space C, but cannot pass through the gap between the damming member 20 and the hard chip 5 thereafter, and the damming space C Sealing and hardening due to the fine particles or the slurry stored in is more remarkable.

Further, in the above-described embodiment, the top surface liner 3 _a is partially different from the conventional top surface liner 3 and bottom surface liner 4 in plan view.
And was used lower surface liner 4 _a, the present invention is not limited thereto, it can also be applied to a case of using the conventional top liner 3 and the lower surface liner 4 above.

[Effect of device]

According to the present invention, the raw material introduced into the rotor that rotates at high speed around the vertical axis is fed along the upper surface and the lower surface liner of a predetermined thickness provided on the upper surface and the lower surface of the rotor by the centrifugal force caused by the rotation of the rotor. In a hard impact type crusher which is guided between the upper surface liner and the lower surface liner and discharges from a rotor outlet having a hard tip, in a front view of the rotor outlet, the rotor upper surface and / or the lower surface and the hard tip A hard impact type crusher is applied in which a damming member is provided in a gap formed between and to suppress the outflow of the raw material from the gap. This can prevent the raw material from flowing out from the gap formed between the hard chip and the upper surface and / or the lower surface of the rotor. As a result, it is possible to prevent local wear of the rotor in the vicinity of the gap and to extend the life of the rotor. Further, it is possible to prevent abnormal vibration due to imbalance of the rotor.

[Brief description of drawings]

FIG. 1 is a plan sectional view partially showing the vicinity of the rotor outlet of a rotor of a vertical impact type crusher according to an embodiment of the present invention, and FIG. 2 is a view of the rotor in the direction of arrow A in FIG. 3 to 6 (b) show a conventional vertical impact type crusher as a background of the present invention, FIG. 3 is a side sectional view thereof, and FIG. 4 is a partial breakage of the rotor shown in FIG. FIG. 5 is a plan sectional view of the rotor of FIG. 4, FIG. 6 (a) is an enlarged view showing the vicinity of the rotor outlet of the rotor of FIG. 5, and FIG. It is a view on arrow A in a). [Explanation of symbols] 1 …… Vertical impact type crusher 2,2a …… Rotor 3,3a …… Upper liner 4,4a …… Lower liner 5 …… Hard tip 7 …… Rotor top plate 8 …… Rotor bottom plate 18 …… Upper gap 19 …… Lower gap 20 …… Damming member

Claims (1)

(57) [Scope of utility model registration request] 1. A raw material charged into a rotor which rotates at a high speed around a vertical axis is fed along an upper surface liner and a lower surface liner of a predetermined thickness provided on an upper surface and a lower surface of the rotor by centrifugal force generated by the rotation of the rotor. In a hard impact type crusher that guides and discharges from a rotor outlet having a hard tip provided between the upper surface liner and the lower surface liner, in a front view of the rotor outlet, the rotor upper surface and / or lower surface and the hard chip A hard impact type crusher characterized in that a damming member is provided in a gap formed between the gaps to suppress outflow of the raw material from the gap.