JPH062239B2 - Coarse crusher - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a coarse material crushing apparatus for crushing coarse materials, particularly thick asphalt lumps.

[Conventional technology]

As the crushing device for the above-mentioned coarse material, for example, the published patent publication
There is a structure shown in No. 58-500890 /, and an example of an apparatus to which this is applied is shown in FIGS. 9 and 10. This crushing device 100 is provided with a pair of upper crushing rollers 101 and 102 and a lower crushing roller 103 located below both rollers and facing each other. The upper crushing rollers 101 and 102 are provided with screw-shaped crushing blades 101a and 102a, respectively, and the lower crushing roller 103 is provided with intersecting screw-shaped crushing blades 103a and 103b. The rollers are rotatably supported by the frame 104, and drive hydraulic motors 105, 106, and 107 are connected to the rollers, respectively. 108 is a hopper attached to the upper part of the frame 104, and 110 and 111
Are counter knives and auxiliary guides, which are provided to face the lower crushing roller 103, respectively.

The coarse material W thus supplied is first fed to the upper crushing roller 10
1, 102 is crushed by being bitten and drops downward as coarse particles, then further crushed by the lower crushing roller 104 and one upper crushing roller 102, and then projected from the crushing blades 103a, 103b of the lower crushing roller 104. The crushed material to be crushed has its protruding portion cut by the counter knife 110, the crushed material surrounded by the crushing blades 103a and 103b is discharged downward, and the remaining portion is the upper crushing rollers 101 and 102.
It is returned to the upper supply side with the rotation of and is crushed again.

[Problems to be Solved by the Invention]

When the above-mentioned crushing device is used, when a large-sized coarse product, especially a large-sized coarse product is supplied, the coarse product is not bitten by the screw-shaped crushing blade and is maintained in a state of being placed on both rollers. It

Therefore, the notch 112 is provided on one of the crushing blades 101a so that the tip of the coarse object W is hooked and engaged. However, in the case of a large-sized coarse object Wa, the tip is on the crushing blade. In some cases, the notch 112 may not be hooked in the riding state.

In view of the above point, the present invention has an object to prevent catching mistakes due to riding on a crushing blade even for a large-sized coarse object, and to ensure biting.

[Means for Solving the Problems]

A coarse object crushing device according to a first aspect of the invention for achieving the above object is a coarse object crushing device in which a coarse object is bitten and crushed by parallel first and second upper crushing rollers. A pair of crushing blades for biting that are orthogonal to the roller axis are symmetrically attached to each other in the circumferential direction, and a notch for inserting a coarse object at least twice the arc length of the crushing blade between the crushing blades. The first upper crushing roller is provided with a crushing blade for engagement which is orthogonal to the roller axis and a crushing blade for shearing which is connected to the second upper crushing roller and is inclined with respect to the circumferential direction. The side surface on the loading side of the hopper is an inclined surface so as to guide the coarse object to the notch for inserting the coarse object.

[Work]

The first opposite to the bulky object guided and supplied by the hopper
Since the upper crushing roller is provided with a notch that is at least twice the arc length of the crushing blade between the pair of biting crushing blades, the tip can be housed in the notch even for thick and coarse objects. . Further, since the crushing blade for biting is provided orthogonal to the roller shaft, the biting is reliable.

Further, by providing a crushing blade for biting and a crushing blade for shearing on the other crushing roller facing the crushing roller, it is possible to perform crushing and crushing by shearing on a coarse object.

〔Example〕

1 to 8 show an embodiment of the present invention. Crushing device 1
Is provided with a first upper crushing roller 2 and a second upper crushing roller 3 which are provided in parallel, and a lower crushing roller 4 which is provided so as to face an intermediate lower portion of both upper crushing rollers. Each of these rollers is rotatably supported by the frame 5, and a hopper 6 is provided on the upper portion of the frame. Reference numerals 7, 8 and 9 denote hydraulic motors for driving each roller.

The first upper crushing roller 2 is a roller body and this roller body 1
And segments 11 and 12 attached to 0.
The roller body 10 is a mounting cylinder 1 mounted on a support shaft 13.
4, a large number of pairs of mounting members 15a, 15b ... (Hereinafter collectively referred to as 15) are fixedly attached, and the mounting member 15 has its outer periphery formed into a polyhedron, for example, a hexahedron, and is sequentially mounted at the mounting positions. And shift it to fix it to the cylinder 14.

The segment 11 forms a mounting base mounted on the outer peripheral mounting surface of the mounting member 15. In addition, the segment 12 is a crushing blade 21 mounted orthogonally on the mount 20.
It is equipped with a crushing blade for biting. First
As shown in FIG. 8, the upper crushing roller 2 has two crushing blades 21,
21 is attached symmetrically. That is, two flat plate-shaped segments 11, 11 are provided with crushing blades 21, and segments 12, 1
Place it between two. The crushing blade 21 is mounted on the mount 20.
It is preferable to make the clearance C slightly smaller than the width and to provide the escape portion C. As a result, the crushing roller 2 is mounted on the circumference including the outer periphery of the crushing blade 21 between the two crushing blades 21 and 21 at the attachment angle (120 °) of the two segments 11, 11 that is, the crushing blade 2
1 arc length of outer circumference (center angle is 60 degrees or less)
A notch A having a length of at least two of the above.

The second upper crushing roller 3 is the first upper crushing roller 2 described above.
The same roller main body 10 as above, and the segments 11 and 12 and the segment 25 attached thereto are provided.
The segment 25 has a mounting base 26 as shown in FIGS. 7 (e) and 7 (f).
A crushing blade 27 (hereinafter referred to as a shearing crushing blade) is obliquely attached on the upper side. Each of these segments 11, 12 and 25
Is sequentially mounted on the mounting member 15 of the roller body 10, and is provided with a notch B for receiving the coarse material W, a crushing blade 21 for biting, and a crushing blade 27 for shearing in order. The cutout B is segment 1
The gap formed by 1 or the arc length of the outer circumference of the crushing blade 21 is equal to or longer than the circumference including the outer circumference. The shearing crushing blade 27 is preferably provided with a rake angle α with respect to the feeding direction P.

The lower crushing roller 4 is configured to further crush and discharge the crushed material coarsely crushed by the upper crushing rollers 2 and 3, and may have an appropriate structure. In the figure, as an example, a crushing blade is provided in a grid shape. That is, the lower crushing roller 4 is formed by attaching the segment 30 to the roller body 10 described above, and the segment 30 is attached to the mounting base 31 on which one side is bent upward to form the auxiliary crushing blade 32 and the auxiliary crushing blade. The parallel main crushing blade 33 and the sub crushing blade 3 substantially orthogonal to these
4 are attached to form the mesh 35.

The side surface 6a on the loading side of the hopper 6 is an inclined surface and is formed so as to guide the rough product W to be fed to the first upper crushing roller 2.

Reference numerals 40 and 41 in the figure denote a counter knife and an auxiliary guide, which are provided to face the lower crushing roller 4, respectively.

Next, the crushing procedure of the crushing device 1 will be described with reference to FIG.

By feeding the coarse material W along the side surface 6a of the hopper 6, the biting crushing blade 21 of the first upper crushing roller 2 bites the tip of the coarse material W into the biting crushing blade of the second upper crushing roller 3. 21 and the crushing blade 27 for shearing, the crushed material is sheared and the coarse crushed material is dropped downward, further crushed by the lower crushing roller 4 and the second upper crushing roller 4, and the width and length are controlled by the mesh 35. Further, the projecting portion is cut by the counter knife 40, the crushed material in the mesh 35 is discharged downward, and the other coarse crushed materials are rotated by the rotation of the first and second upper crushing rollers 2 and 3. It is reduced to the top and crushed again.

In this case, two crushing blades 21 and 21 are attached to the first upper crushing roller 2 so as to face the roller body 10,
A notch A is formed between the crushing blades at an interval of at least twice the arc length of the crushing blades, that is, approximately a half circumference. Therefore, the tip of the coarse object W having a relatively large thickness is housed in the notch A, so that the crushing blade 21 can be surely engaged.

In this case, the first and second upper crushing rollers 2 and 3 may be close to each other, but when provided with an appropriate interval m therebetween, the biting width is increased, which is effective. .

In the above embodiment, the mounting member 15 has a hexagonal shape and the segments are mounted on the respective surfaces.
The attachment member of the upper crushing roller may be octagonal, and two crushing blades for biting may be symmetrically provided, and three flat block-shaped segments may be attached between both crushing blades. With this structure, the notch between the crushing blades can be further enlarged.

〔The invention's effect〕

According to the present invention, the first upper crushing roller, which opposes the coarse material thrown in along the chute, is provided symmetrically with the crushing blades for biting that make a pair in the circumferential direction, and at least crushes between the crushing blades. Since the cutouts are formed on the circumference including the outer circumference of the blade at intervals that are at least twice the arc length of the crushing blade, it is possible to reliably bite even a coarse-walled object.

On the other hand, the other upper crushing roller is equipped with a crushing blade for biting and a crushing blade for shearing inclined with respect to the rotation direction, so that a coarse object is pressed in the axial direction of the roller, and by the biting crushing blade of the opposing crushing roller. It can be crushed by crushing and shearing.

[Brief description of drawings]

1 to 8 relate to an embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a coarse material crushing device taken along line I-I in FIG. 2, FIG. 2 is a plan view thereof, and FIG. Front view of the first upper crushing roller, FIG. 4 is a front view of the second upper crushing roller, fifth
Fig. 6 is a front view of the lower crushing roller, Fig. 6 is a partially cutaway front view of the roller main body, Fig. 7 (a) ・ is a plan view of the mounting base segment, and Fig. 7 (b) ・ is its partially cutaway. Front view, (c) of the same figure
Is a plan view of the bite segment, (d) is a left side view of the same, (e) is a plan view of the shearing segment, (f) is a front view thereof, and FIG. 8 is Longitudinal sectional view of the first upper crushing roller,
FIG. 9 is a vertical cross-sectional view of a conventional coarse material crushing device, and FIG. 10 is a plan view thereof. 1 is a coarse material crushing device, 2, 3 and 4 are crushing rollers, 6 is a hopper, 6a is an inclined side surface, 21 is a crushing blade for biting, 27 is a crushing blade for shearing, and A and B are notches.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-62-121662 (JP, A) SAI-KAI 61-8445 (JP, U)

Claims (1)

[Claims] 1. A coarse-material crushing device for crushing coarse particles by first and second upper crushing rollers forming parallel pairs, wherein a pair of first and second upper crushing rollers are orthogonal to the roller axis. Crushing blades are installed symmetrically in the circumferential direction, and a notch for inserting a coarse object is formed between the crushing blades at least twice the arc length of the crushing blades, and a roller is provided on the second upper crushing roller. A biting crushing blade that is orthogonal to the axis and a shearing crushing blade that is connected to the biting crushing blade and is inclined with respect to the circumferential direction are attached to guide the coarse object to the coarse object insertion notch of the first upper crushing roller. An apparatus for crushing bulky material, characterized in that the side surface of the loading side of the hopper is an inclined surface.