JPH08108084A - Impact crusher - Google Patents

Abstract

PURPOSE: To provide a structure for preventing the failure due to the sticking of crushed powder when a waste asphalt material is crushed. CONSTITUTION: A scraper 7 projecting toward the inner wall of a casing 4 from both side faces of a striker 3 in the direction of its rotation axis is installed to the rotary crushing part 2 to which the plural strikers 3 are radially fixed in the direction of the periphery of a rotor 5. Consequently, the crushed powder between the inner wall of the casing 4 and the striker 3 is scraped put by the scraper 7 as the rotor 5 rotates. Since the crushed powder remains between the scraper 7 and the inner wall of the casing 4 when the crusher is stopped, the resistance to the starting of the crusher is reduced when the remaining crushed powder of a waste asphalt material is stuck only to the scraper 7, and the crusher is easily started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact type crusher for impact crushing crushed stones, asphalt waste materials and the like, and particularly when crushing the above-mentioned asphalt waste materials, the asphalt powder softened by the temperature rise during the crushing is applied to a rotating part. The present invention relates to an impact-type crusher having a structure that prevents it from becoming an obstacle at the time of restarting by being attached to.

[0002]

2. Description of the Related Art In the above impact type crusher, as shown in an open side view in FIG. 6, a rotor 33 to which a plurality of impacting elements 32 are attached is provided in a casing 36, and a rotor 33 is provided in the casing 36. The object to be shattered from the mouth 34 is hit by the hitting element 32 by the rotation of the rotor 33 and shredded. Further, the object to be shattered by being hit is collided with the repulsion plate 35 and shattered, and at the same time, it bounces and is shattered again by the hitting element 32. The object to be crushed is crushed by repeating this crushing operation. The main purpose of such an impact crusher is to crush crushed stones, but the demand for using it for crushing concrete waste materials and asphalt waste materials is increasing rapidly.

[0003]

When the asphalt waste material is crushed by the above impact crusher, the asphalt powder crushed is softened by the temperature rise during the crushing and the tackiness increases, and the crushed powder repels the casing and repulsion. Adhere to plates, rotors, etc. FIG. 7 shows a cross section taken along the line DD of FIG. 6, in which the crushed powder of the asphalt waste material has a plurality of impactors 32.
If it adheres to the narrow gap B between the casing liner 37 and the casing liner 37, it is soft during the operation of the crusher and there is no resistance enough to stop the rotation of the rotor, which does not hinder the operation, but until the start of the next day after the end of operation. It solidifies during this and interferes with the rotation of the rotor. Especially in winter when the temperature is low, it is impossible to start every morning and there is a problem that it is necessary to remove adhered asphalt powder. Therefore, an object of the present invention is to provide an impact-type crusher having a structure for preventing an obstacle due to adherence of crushed powder generated when crushing asphalt waste material.

[0004]

In order to achieve the above object, the means adopted by the present invention is a rotary crushing part in which a plurality of impacting elements are radially fixed in the outer peripheral direction of a rotor rotating around a horizontal axis. , Arranging it in a casing formed with inner side walls along both sides in the direction of the axis of rotation of the striker, and crushing the object to be crushed, which has been charged from a charging port provided above the casing, by the rotary crushing. In an impact type crusher for crushing by rotation of a part, the rotary crushing part is provided with a projecting portion projecting from both side surfaces in the axial direction of the rotation axis of the striker toward the inner wall of the casing. It is configured as a type crusher. The protruding portion may be formed by extending the width of one of the plurality of hitting elements in the direction of the axis of rotation. Further, the protruding portion may be formed by attaching a dust removing member having a length comparable to the side length of the striker to the rotor. Further, the dust removing member may be replaceably attached, or the height in the direction of the rotation axis may be adjustable.

[0005]

According to the present invention, the plurality of hitting elements radially fixed to the outer circumferential direction of the rotor are protruded toward the inner wall of the casing from both side surfaces of the hitting element in the rotational axis direction of the rotary crushing portion. By providing the projecting portion, the projecting portion has a function of scraping out the crushed powder existing between the inner wall of the casing and the striker by the rotation of the rotor. When the operation of the crusher is stopped, the crushed powder remains only between the protruding part and the inner wall of the casing. Therefore, even if the remaining crushed powder sticks, the crushed part is stuck in a narrow area only. Further, since the projecting portion may be formed at one location on each side of the rotary crushing section, there are few fixing points, and therefore the resistance given when the crusher is activated is small and can be easily activated. The above-mentioned projecting portion exerts the above-mentioned effect by extending the width of one of the plurality of impacting elements or by attaching a member formed as a dust removing member to the rotor. Since the dust removing member is worn by the crushed powder, the effect can be maintained if it is replaceable or is mounted so that the height can be adjusted.

[0006]

Embodiments of the present invention will be described below with reference to the accompanying drawings for the understanding of the present invention. still,
The following example is an example embodying the present invention and does not limit the technical scope of the present invention. Figure 1
1 is a side open view showing a structure of an impact type crusher according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is a mounting portion showing a structure of a scraper according to a first embodiment. Enlarged view,
FIG. 4 is an enlarged view of a mounting portion showing the configuration of the scraper according to the second embodiment, and FIG. 5 is an enlarged view of the mounting portion showing the configuration of the scraper according to the second embodiment. 1 and 2, the impact type crusher 1 according to the embodiment has a plurality of hitting elements 3 attached to a rotor 5 fixed to a rotary shaft 9 having a rotary shaft driven to rotate in a horizontal direction. The rotary crushing unit 2 is configured. The rotary crushing unit 2 is arranged in the casing 4. As shown in FIG. 1, the casing 4 is provided with an inlet 11 for the material to be crushed, and the rotary crushing part 2 has a rotation axis direction, as shown in FIG.
The structure is closed by a casing liner (casing inner side wall) 6 provided with. When the rotary crushing unit 2 is rotated and an object to be crushed is introduced from the charging port 11, the object to be crushed is hit by the hitting element 3 and crushed, and the object to be crushed that is splashed is placed in the casing 4. When it hits the repulsion plate 12 and is crushed, and further bounces off the hitting element 3, the crushing by the hitting element 3 causes the crushing to proceed. The above configuration is the same as the conventional configuration.

In the conventional crusher, when the object to be crushed is asphalt waste material, the asphalt powder adhering to the position of the interval B shown in FIG. 2 softens due to the temperature rise due to crushing, and the operation of the crusher is stopped. At this time, the impactor 3 and the casing liner 6 are fixed by solidifying as the temperature decreases. Especially, when the operation of the crusher is stopped in the winter when the temperature is low and the operation is started the next morning, the asphalt powder is stuck to the impactors 3 and the casing liner 6, so Unless the sticking is removed, the rotary crushing unit 2 cannot be driven to rotate. Therefore, in the crusher 1 according to the present embodiment, scrapers (protruding parts / dust removing members) 7 are provided on both sides of the rotary crushing unit 2 in the rotation axis direction in order to prevent the start-up difficulty due to the sticking of the asphalt powder. ing. The construction of the first embodiment of the scraper 7 is shown in FIG. 3 as an enlarged view of the mounting portion. In FIG.
A bracket 8 is attached to the rotor 5 in the vicinity of one of the plurality of hitting elements 3.
Is fixed, and the scraper 7 is attached to the bracket 8 by bolting. As shown in FIG. 3A, the scraper 7 includes a striker 3 and a casing liner 6.
Distance C between the casing liner 6 that is narrower than the distance B between
It is attached to both sides of the rotary crushing unit 2 so that
As shown in FIG. 3B, the scraper 7 is formed to have a length comparable to the side length of the striker 3.

When the rotary crushing section 2 provided with the scraper 7 is rotated, the crushed powder adhering between the striker 3 and the casing liner 6 is scraped off by the scraper 7, and when the crusher 1 is stopped. The crushed powder adheres only between the scraper 7 and the casing liner 6. When the object to be crushed is asphalt waste material, the asphalt powder adhered between the scraper 7 and the casing liner 6 is softened by the temperature increase due to the operation of the crusher 1, and solidifies when the operation of the crusher 1 is stopped. The casing liner 6 and the casing liner 6 are fixed to each other only at two positions on both sides of the rotary crushing unit 2. In the case of the conventional configuration, when the number of the hitting elements 3 is four as shown in FIG. 1, there are eight fixed portions on both sides, so that the fixing force is strong and the asphalt powder solidifies. In this case, the resistance to start the rotation of the rotary crushing unit 2 is extremely large,
If there are only two fixing resistances of the scraper 7, rotational driving can be easily performed. Also, the area of the surface to be fixed is
Since the scraper 7 is smaller than the striker 3, the sticking resistance is further reduced.

The scraper 7 is made of steel or ceramics, but wear due to friction with the crushed powder is unavoidable. As the wear progresses, the distance C between the scraper 7 and the casing liner 6 increases, and the scraper 7
Will reduce the effect. Therefore, since the scraper 7 is fixed by bolts, the scraper 7 must be replaced. When the scraper 7 is worn like the second embodiment shown in FIG. 4, the spacing C can be kept constant by inserting the spacer 10 into the seat portion that bolts the scraper 7 to the bracket 8. it can. According to this configuration, the frequency of exchanging the scraper 7 is reduced, so that the cost can be reduced. Furthermore, without specially providing the scraper 7, one of the plurality of hitting elements 3 can be configured as a protruding portion that acts as the scraper 7. As in the configuration of the third embodiment shown in FIG. 5, the width of one of the rotary crushing portions 2 of the striker 3 in the direction of the rotation axis is extended so that the distance C from the casing liner 6 is maintained. In this configuration, one of the strikers 3 is the scraper 7
Will also have the function of. However, this configuration has the advantage that the scraper 7 is unnecessary, but has the disadvantage that two types of impactors 3 must be prepared.

[0010]

As described above, according to the present invention, in the rotary crushing portion in which a plurality of impacting elements are radially fixed in the outer peripheral direction of the rotor, the casing is inserted from both side surfaces of the impacting element in the rotation axis direction. By providing a projecting portion (scraper) projecting toward the inner wall of the casing, the projecting portion serves to scrape out the crushed powder existing between the inner wall of the casing and the striker by the rotation of the rotor. When the operation of the crusher is stopped, the crushed powder remains only between the projecting portion and the inner wall of the casing. Therefore, when the crushed powder of the asphalt waste material remains, and the crushed powder sticks, the crushed powder also protrudes. Since only a part is fixed in a narrow range and there are few fixed parts,
The resistance applied when the crusher is activated is small and can be easily activated. The above-mentioned projecting portion exerts the above-mentioned effect by extending the width of one of the plurality of impacting elements or by attaching a member formed as a scraper to the rotor. Since the scraper wears due to crushed powder,
The effect can be sustained by making it replaceable or height-adjustable.

[Brief description of drawings]

FIG. 1 is a side open view showing a configuration of an impact type crusher according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged view of a mounting portion showing the configuration of the first embodiment of the scraper according to the embodiment.

FIG. 4 is an enlarged view of a mounting portion showing the configuration of a second embodiment of the scraper according to the embodiment.

FIG. 5 is an enlarged view of a mounting portion showing a configuration of a second embodiment of the scraper according to the embodiment.

FIG. 6 is a side open view showing a configuration of an impact type crusher according to a conventional example.

7 is a sectional view taken along the line DD of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Impact type crusher 2 ... Rotational crushing part 3 ... Impactor 4 ... Casing 5 ... Rotor 6 ... Casing liner (casing inner side wall) 7 ... Scraper (protruding part / dust removing member) 9 ... Rotating shaft 10 ... Spacer

Claims (5)

[Claims] 1. A rotary crushing unit in which a plurality of impacting elements are radially fixed in the outer peripheral direction of a rotor rotating about a horizontal axis,
It is arranged in a casing formed with inner side walls along both sides in the direction of the rotation axis of the striker, and the object to be crushed introduced from a charging port provided above the casing is crushed by the rotary crushing unit. In the impact type crusher that is crushed by the rotation of the impact type crusher, the rotary crushing portion is provided with a protruding portion protruding from both side surfaces in the axial direction of the rotation axis of the striker toward the inner wall of the casing. Crushing machine. 2. The impact type crusher according to claim 1, wherein the projecting portion is formed by extending the width of one of the plurality of hitting elements in the direction of the axis of rotation. 3. The impact type crusher according to claim 1, wherein the protruding portion is formed by attaching a dust removing member having a length comparable to a side length of the hitting element to the rotor. 4. The impact type crusher according to claim 3, wherein the dust removing member is replaceably attached. 5. The impact type crusher according to claim 3, wherein the dust removing member is mounted so that its height in the direction of the axis of rotation can be adjusted.