JP3558210B2 - Impactor mounting device for impact crusher - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a striker mounting device of an impact crusher for crushing asphalt mixture, concrete, crushed stone and the like. More specifically, the present invention relates to a mounting structure of a holding block for holding the striker and a protection structure of a support member for supporting the striker.
[0002]
[Prior art]
Conventionally, what is generally referred to as an impact type crusher is for crushing and crushing industrial waste, that is, crushed material such as concrete waste material, asphalt mixed lump, aggregate for civil engineering construction, or crushed stone, and the like. Waste materials are reused as recycled materials.
[0003]
This impact-type crusher rotates a rotor with a horizontal axis in which a plurality of strikers are arranged in a radial direction in a casing, and impacts between a material to be crushed and a repulsion plate fixed on the inner surface of the casing. And crushed. Since the striker attached to the rotor is always in direct contact with the material to be crushed with impact force, the tip portion wears out with the lapse of use time.
[0004]
In general, the tip portion of the striker wears off considerably after a certain period of time, so that the crushing efficiency is significantly reduced. For this reason, the striker has been replaced. Although various proposals have been made for this exchange method, none of them makes the exchange completely unnecessary. As an example of this replacement method, there is a method of pulling out the striker in the radial direction of the rotor via a key, or a method of replacing it with a crane or the like (JP-A-5-220415).
[0005]
Further, regarding the mounting structure of the striker, after the striker is inserted into the notch of the rotor body, the engaging projection is fitted and supported in the engaging hole of the holding block, and the holding block is supported between the support members. The same applicant has proposed in Japanese Utility Model Laid-Open No. 4-45547 as a device for fixing the striker.
[0006]
The technique of this proposal includes a striker that is removably inserted into a cutout portion formed in a radial direction on the outer peripheral portion of the rotor body and has an engagement protrusion on a surface opposite to the rotation direction of the rotor body, A holding block having an engagement hole into which the engagement protrusion of the hitting element is detachably fitted, and an upper and lower support member provided on the rotor body side and capable of fixing the vertical movement of the holding block, In addition, the holding block can be detachably inserted in a direction in which the holding hole is disengaged from the engaging projection.
[0007]
On the other hand, the outer portion of the support portion supporting the holding block in the radial direction of the rotor directly receives the centrifugal force of the impactor, and the inner portion in the radial direction of the rotor receives the impact force of the impactor. Further, dust in the casing is scattered around as a powder stream, and the supporting portion is directly exposed to the crushing environment.
[0008]
The dust flows into the gap or the like of the butting portion of the striker in a gas flow due to the rotation of the rotor. At this time, the dust flows in a state of rubbing the metal body in a file-like manner, thereby promoting wear of the metal body.
[0009]
Generally, since the support portion such as the rotor holder does not have a high hardness, the support portion is quickly worn, and thus the shape of the support portion is changed. In the worst case, the support portion may be broken. Conventionally, the rotor holder was overlay-welded to the rotor disk.
[0010]
[Problems to be solved by the invention]
However, none of the conventional techniques completely solve the countermeasure against hitting of the striker. If the wear of the striker advances, the tip radius of the striker is reduced after the impact, so that the rotor rotation radius of the tip is smaller than the initial shape radius of rotation. Therefore, when the striker is worn, the peripheral speed at the tip of the striker is reduced, and the impact force is reduced, thereby reducing the crushing efficiency of the crusher. In addition, since the gap with the repulsion plate becomes large, the crushing efficiency is also reduced. For this reason, it greatly affects the grain shape and particle size of the material to be crushed.
[0011]
Conventionally, when the crushing ability has dropped, the striker has been removed and replaced with a new one, or the same striker has been turned over and its orientation has been changed and reinstalled. The striker is made of high chromium cast iron, high manganese cast steel, chrome molybdenum cast steel or the like, and has high hardness and is expensive, so it must be used effectively without waste.
[0012]
On the other hand, the support member supporting the striker is exposed, and as described above, abrasion due to dust in the casing is inevitable, which has been a problem. Overlay welding of the rotary holder required many man-hours and was not economically efficient.
[0013]
The present invention solves such conventional problems, increases the crushing efficiency, suppresses the reduction in capacity, and keeps the particle shape and particle size of the crushed material constant, reduces the running cost, reduces the number of replacement steps, It is an object of the present invention to provide a striker mounting device for an impact-type crusher that can effectively use a striker.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, a striker mounting device for an impact-type crusher according to the first aspect of the present invention has a striker protruding from an outer periphery of a rotor body, and a holding member for holding the striker. In an impact-type crusher that strikes and crushes a crushed material and crushes the scattered crushed material with a repulsion plate, the striker is attached to and detached from a notch formed in a concave shape on an outer peripheral portion of the rotor body. freely insertable, said to have a engaging protrusion to the plane of the rotational direction of the rotor body, the engaging projection of the striker has a disengageably insertable engagement hole, the engagement hole a holding block edges is so different radial thickness of the outer and inner wall thickness of the rotor body, provided on the outer side in the radial direction of the rotor body, in contact with the outer surface of the holding block First holding the holding block to prevent movement in the radial direction; And support member, the provided inwardly in the radial direction of the rotor body, and a second support member for preventing the contact movement in the radial direction to sandwich the holding block to the outer surface of the holding block It is characterized by the following.
The impactor mounting device of the impact-type crusher according to the second aspect of the present invention, wherein the first support member and the second support member are formed by reversing a thick portion having a different thickness of the holding block between the outside and the inside. The structure which can be attached is good.
[0015]
A striker mounting device for an impact crusher according to a third aspect of the present invention is the impact striker mounting device for an impact crusher according to the first aspect, further comprising: a protective member provided so as to cover between the adjacent first support members. It is characterized by having.
Striker mounting apparatus of an impact crusher of the present invention 4, the striker mounting device for an impact crusher of the present invention 3, the protective member may be composed of the striking element is substantially the same material It is characterized by.
[0016]
When the protective member is made of substantially the same material as the striker, the wear of the protective member and the striker progresses uniformly, so that the replacement time of both may coincide. The term “substantially the same material” as used in the present invention does not necessarily mean a material made of the same component, and the physical properties required for an impact crusher such as abrasion resistance and impact resistance are substantially the same, Or a similar material. Further, it is preferable that the edge of the engagement hole of the holding block is configured to have a different thickness between the outer side and the inner side in the rotor radial direction.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the entire configuration of the impact crusher of the present invention, which is cut in a direction perpendicular to the axis of the rotor 1. The casing 2 has an opening at the top, and serves as an inlet 3 for the material to be crushed. A discharge port 4 for discharging the crushed remaining crushed material is disposed below the rotor 1.
[0018]
The above-described rotor 1 has a configuration in which a plurality of rotor disks 5 are stacked along an axis, and a rotor shaft 6 is provided at a center portion. The rotor shaft 6 is disposed outside the casing 2 (not shown). And a pulley and a motor (not shown).
[0019]
A plurality of strikers 7 are respectively held (gripped) between the plurality of adjacent rotor disks 5, and a plurality of strikers 7 are arranged and fixed on the outer periphery of the rotor disk 5. In the present embodiment, four strikers 7 are detachably attached at equal angular intervals. The striker 7 is provided with protrusions 11 and 12 in a convex shape.
[0020]
The outer periphery of the rotor disk 5 described above is provided with a notch 8 in a concave shape along the radial direction, and the striker 7 is attached to the notch 8. When the strikers 7 are mounted in the cutouts 8, the end faces of the strikers 7 are abutted with each other along the axial direction of the rotor, thereby forming a row of strikers.
[0021]
A protective liner 9 is fixed to the rotor disk 5 via a bolt 10 so as to face the recessed notch 8 of the rotor 1. The protective liner 9 faces the notch 8 and receives the striker 7. A holding block 13 is fixedly arranged on the rotor disk 5 on the opposite side of the protective liner 9 with the hitting element 7 interposed therebetween.
[0022]
The holding block 13 is in a state of being installed in a cutout portion of the rotor disk 5. Further, a rotor holder 14 is fixed to the rotor disk 5 so as to be located on the outer side in the rotor radial direction, and supports the holding block 13 in contact with the outer surface of the holding block 13. Further, a second rotor holder 15 is provided on the rotor disk 5 on the opposite side of the rotor holder 14 with respect to the holding block 13, that is, inside the rotor 1 in the radial direction, and is in contact with the inner surface of the holding block 13. The holding block 13 is supported.
[0023]
Further, the holding block 13 has a □ -shaped engaging hole 21 facing the striker 7 side (see FIG. 9), and the protrusion 11 or 12 of the striker 7 engages with the engagement hole 21. It has become. FIG. 8 is a perspective view of a single impactor 7. FIG. 9 is a perspective view of the holding block 13 alone. When the striker 7 and the holding block 13 are combined, the above-described protrusion 11 or protrusion 12 is inserted into the engagement hole 21.
[0024]
When the holding block 13 is engaged with the striker 7, the holding block 13 is prevented from moving and fixed by the holding block fixing pin 16 fixed to the rotor disk 5. Therefore, after the striker 7 is inserted into the notch 8 of the rotor disk 5, the striker 7 is held and fixed by the protective liner 9 and the holding block 13.
[0025]
The rotor 1 having such a configuration is rotated via the motor and the pulley in the direction of an arrow (FIGS. 1 to 4). The material to be crushed, that is, the asphalt-mixed mass or the like, which has been thrown in from the inlet 3 of the casing 2, is hit by the hitting element 7 and, by the reaction thereof, hits the first repulsion plate 17 provided around the rotor 1 and breaks into pieces. Is done.
[0026]
Subsequently, the crushed material to be crushed further strikes the second repulsion plate 18 and becomes fine crushed material, which is discharged from the lower discharge port 4. The first repulsion plate 17 and the second repulsion plate 18 are supported by a repulsion plate suspension bolt 19 protruding outward from the casing 2 so as to be able to adjust the distance from the circumference of the rotating rotor 1. The distance between the second repulsion plate 18 and the rotor 1 is smaller than that of the first repulsion plate 17.
[0027]
Next, the configurations of the holding block 13 and the rotor holder 14, which are main parts of the present invention, will be described in detail. When the striker 7 crushes the material to be crushed by the rotation of the rotor 1, its tip gradually wears out. FIG. 2 shows the tip of the striker 7.
[0028]
As the striker 7 wears out as shown in the figure, there is a dimensional difference C between the initial shape A of the original striker 7 and the worn tip B. If the dimensional difference c is large, a difference occurs in the peripheral speed of the rotor 1 due to the rotation, that is, the peripheral speed of the tip portion of the striker 7. For this reason, when the striker 7 is worn, the peripheral speed decreases.
[0029]
The decrease in the peripheral speed of the rotor 1 of this impact type crusher means that the gap between the first repulsion plate 17 and the second repulsion plate 18 increases as described above, and the crushing efficiency and capacity of the crusher Will decrease. Also, depending on the type of the material to be crushed, it greatly affects the grain shape and particle size of the crushed material.
[0030]
The present invention is intended to reduce the distance between the striker 7 and the first repulsion plate 17 and the second repulsion plate 18 due to rotation even if the striker 7 is worn. Will be described. FIG. 3 shows the mounting state of the holding block 13, which is a single unit as a perspective view in FIG. 9 as described above. The holding block 13 has a thickness different between the outer side 22 and the inner side 23 at the edge of the radial hole of the rotor 1. In FIG. 3, if the thickness of the inner side 23 is A and the thickness of the outer side 22 is B, the relationship is A <B.
[0031]
FIG. 4 shows a state in which the holding block 13 is mounted upside down, and A and B are upside down. That is, when the striker 7 is worn and a difference of X1 is generated between the outer shape and the outer shape of the initial shape, the outer side 22 and the inner side 23 which are the radial edges of the holding block 13 are reversely mounted as shown in FIG. As a result, the striker 7 can be moved radially outward, so that the difference X1 becomes smaller by X2, and the difference X1 becomes closer to the outer peripheral dimension of the initial shape.
[0032]
After the wearer 7 has been worn and then shifted and used as described above, the mounting direction may be reversed and the surface on the unworn side may be reattached as the work surface. 7 can be used effectively without waste. When the present invention is applied, the striker 7 can be used repeatedly four times.
[0033]
Next, the configuration of the rotor holder 14 will be described. FIG. 5 shows a conventional mounting structure, in which the rotor holder 14 is mounted on the rotor disk 5 by overlay welding. FIG. 6 shows a configuration in which the holder protector 20 is attached to the rotor holder 14. Accordingly, the striker 7 is partially directly supported via the holder protector 20. As shown in FIG. 7, the holder protector 20 is attached to protect the rotor holder 14 in the gap between the striking element 7 and the striking element 7.
[0034]
As described above, with the rotation of the rotor 1, dust passes through these gaps in an air current and causes a file effect, so that the rotor holder 14 is worn down. The holder protector 20 is for protecting the same, and is made of the same hard material as the striker 7 to prevent the rotor holder 14 from being worn. The holder protector 20 is attached to the rotor holder 14 from the side of the striker 7 without using bolts or the like. After the striker 7 is fixed, the holder protector 20 does not fall off.
[0035]
Next, the operation will be described. The striker 7 is inserted into the notch 8 of the rotor body from the outside in the radial direction. Next, the holding block 13 provided facing the notch is inserted from the direction perpendicular to the insertion direction of the striker 7, and the engaging hole 21 of the holding block is engaged with the projection 11 or 12 of the striker 7. Subsequently, the retaining block retaining pin 16 is brought into contact with the back surface of the retaining block 13, the retaining block 13 is restrained on the outer side 22 and the inner side 23 in the radial direction by respective supporting members, and the striker 7 is disposed on the rear side with the protective liner 9. It is in a fixed state because it is received at In this state, the rotor body is rotated via the motor and the pulley, and the material to be crushed is crushed by the striker 7.
[0036]
When the striker 7 is worn, the striker 7 and the holding block 13 can be removed in a procedure reverse to the insertion of the striker 7. The detached holding block 13 is reattached by reversing the directions of the outer side 22 and the inner side 23 in the radial direction, and the engaging hole 21 of the holding block 13 is engaged with the projection 11 of the striker 7. At this time, since the thickness of the edge of the engaging hole 21 in the radial direction is different, the striker 7 is shifted in the radial direction.
[0037]
Similarly, the holder protector 20 is attached so as to cover the first support member located between the strikers 7 before the striker 7 is inserted. After attaching the holder protector 20, the striker 7 is fixed to the rotor disk 5 in the same procedure as described above.
[0038]
Although the embodiment of the present invention has been described above, the specific configuration of the present invention is not limited to this embodiment. Although the embodiment of the present invention is directed to an apparatus in which the rotation of the rotor 1 is limited to one direction, the present invention can also be applied to the case of a reversal method in which the rotor 1 is reversed. Further, the number of strikers 7 is not limited to four.
[0039]
【The invention's effect】
As described above, according to the present invention, when the impactor is worn and worn, if the abutment portion having a different thickness of the holding block, that is, the edge is mounted in reverse, the impactor is positioned radially outward. It becomes possible to protrude, and the circumference shape when the striker rotates can be made closer to the outer peripheral dimension of the initial shape.
[0040]
As a result, by applying the method of the present invention, the crushing efficiency is increased, and the grain shape and the grain size after crushing of the material to be crushed are reduced to the normal values at the time of setting, as compared with the decrease in the crushing efficiency while the impactor remains worn. It was possible to get close to it and it was always possible to crush things of a certain quality.
[0041]
Also, by attaching the holder protector to the rotor holder, the wear of the rotor holder was prevented. Furthermore, since the holder protector can be easily attached and has a high hardness, the wear of the holder protector itself is small, and as a result, the impact crusher can be operated for a long time. Now you can. In addition, the work efficiency is improved without stopping the crusher for a long time and performing repair.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the entire impact type crusher, in which an axial direction of a rotor is cut at a right angle.
FIG. 2 is a partial view showing a mounting structure of a striker, in a state where a tip is worn.
FIG. 3 is a diagram showing a state in which the hitting element is held by the holding block of the present invention, and shows a configuration in a case where the hitting element remains worn.
FIG. 4 is a diagram showing a state in which the attachment of the holding block is reversed, and the striker projects outward in the outer peripheral direction.
FIG. 5 is a diagram showing a conventional configuration of a rotor holder.
FIG. 6 is a diagram showing a configuration in which a protective device is attached to a rotor holder.
FIG. 7 is a plan view of the rotor holder viewed from an outer peripheral direction, and is a diagram illustrating a state where the holder protector of the present invention is attached.
FIG. 8 is a perspective view of a single striker.
FIG. 9 is a perspective view of the holding block alone.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Rotor 2 ... Casing 3 ... Material to be crushed 5: Rotor disk 6 ... Rotor shaft 7 ... Striking element 8 ... Notch 11, 12 ... Protrusion 13 ... Holding block 14 ... Rotor holder 16 ... Holding block fixing pin 17 ... First repulsion plate 18 Second repulsion plate 20 Holder protector 21 Engagement holes 22 and 23 Edges of holding block

Claims (4)

A striker protruding from the outer periphery of the rotor body,
In the impact type crusher, which has a holding member for holding the striker, crushes the input crushed material by hitting it, and crushes the scattered crushed material with a repulsion plate.
The striking element, the rotor body outer peripheral portion into the notch formed in the recess shape is freely insertable removably in the, have a engaging protrusion to the plane of the rotation direction of the rotor body,
Wherein the engaging projection of the striker has a disengageably insertable engaging hole, as the edge of the engaging hole is different thicknesses of the wall thickness of the radially outer and inner of the rotor body Holding block,
A first support member provided on a radially outer side of the rotor main body and abutting on an outer surface of the holding block to sandwich the holding block and prevent movement in the radial direction;
A second support member provided on a radially inner side of the rotor body and abutting against an outer surface of the holding block to hold the holding block and prevent movement in the radial direction. Impactor mounting device for impact type crusher. The striker mounting device for an impact-type crusher according to claim 1,
The impact-type crusher, wherein the first support member and the second support member can be attached such that thick portions having different thicknesses of the holding block are inverted outside and inside. Striker mounting device. The striker mounting device for an impact-type crusher according to claim 1,
A protection member provided between the adjacent first support members so as to cover the first support member. The striker mounting device for an impact-type crusher according to claim 3,
The striker mounting device for an impact-type crusher , wherein the protection member is made of substantially the same material as the striker.

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