Double-rotor crusher

Abstract

The utility model discloses a double-rotor crusher, and belongs to the field of slag processing devices. Comprising a shell with a crushing cavity, a first rotor and a second rotor parallel to the first rotor are arranged in the crushing cavity, the first rotor and the second rotor comprise a first main shaft and a second main shaft respectively, and a plurality of first main blades and a plurality of second main blades are fixed to the first main shaft and the second main shaft in the axial direction at intervals respectively; the first rotor is provided with auxiliary blades between the adjacent first main blades, the second rotor is provided with auxiliary blades between the adjacent second main blades, and the multiple auxiliary blades are arranged in the circumferential direction of the first main shaft and the circumferential direction of the second main shaft in a staggered mode. According to the utility model, the auxiliary blades on one rotor are matched with the main blades on the other rotor to assist in cutting and crushing wastes, so that the cutting capacity of the blades of the rotor is improved, and the phenomenon that the blades of the rotor press the wastes on the other rotor and cannot crush the wastes, so that the rotors rotate reversely and the cutting action is blocked is prevented; and faults of the crusher are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of slag processing devices, in particular to a double-rotor crusher. Background Art

[0002] Slag powder is a new type of admixture for high-performance concrete. It can greatly improve the strength of cement concrete, prepare ultra-high-strength cement concrete, effectively inhibit the alkali-aggregate reaction of cement concrete, significantly improve the alkali-aggregate reaction resistance and durability of cement concrete, and at the same time can also improve various properties of concrete, such as seawater erosion resistance, workability, compactness, and impermeability. Before mixing with concrete, the slag needs to be ground into powder to facilitate more thorough mixing with concrete.

[0003] In the process of processing slag into slag powder, a crusher is required to process large-sized waste materials into small-sized granular materials. A double-rotor crusher is a practical slag crushing machine. The existing double-rotor crusher includes two rotors that are parallel and rotate in opposite directions relative to each other. The blades of one rotor are alternately arranged with the blades of the other rotor, so that the blade part of the first rotor close to the main shaft of the second rotor and the blade part of the second rotor close to the main shaft of the first rotor are alternately arranged along the direction parallel to the extension direction of the two rotors. Some blades have teeth with an arched profile, and these teeth are inclined and staggered along the direction towards the other rotor to improve the grasping force of the blades on the waste materials and push them through the space between the two rotors. However, in the crushing stage of this double-rotor crusher, when the teeth and blades of one rotor cut large-sized waste materials so that they cannot pass through the space between the two rotors, the teeth on the blades of the first rotor may press the waste materials against the second rotor and prevent further crushing of them, which will cause the rotation of the rotor to reverse, and then lead to the blocking of the further crushing and cutting actions of the waste materials on the second rotor, resulting in the failure of the crusher. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to solve the deficiencies and problems existing in the above-mentioned prior art, and provide a double-rotor crusher, which improves the cutting ability of the blades of the rotor, prevents the blades of the rotor from pressing the waste materials against another rotor and causing the reverse rotation of the rotor and the blocking of the cutting action, and reduces the occurrence of crusher failures.

[0005] An embodiment of the present utility model provides a double-rotor crusher, which includes a housing having a crushing chamber. A first rotor and a second rotor parallel to the first rotor are provided in the crushing chamber. The first rotor and the second rotor rotate in opposite directions. The first rotor and the second rotor respectively include a first main shaft and a second main shaft. A plurality of first main blades and a plurality of second main blades are respectively and axially spaced and fixed on the first main shaft and the second main shaft. Auxiliary blades are provided between adjacent first main blades of the first rotor and between adjacent second main blades of the second rotor. The plurality of auxiliary blades are staggeredly arranged in the circumferential direction of the first main shaft and the second main shaft respectively.

[0006] Further, the plurality of first main blades of the first rotor and the plurality of second main blades of the second rotor are alternately arranged along the extending direction of the double-rotor crusher.

[0007] Further, the first main blades and the second main blades respectively have a plurality of first cutting portions and a plurality of second cutting portions. The plurality of first cutting portions and the plurality of second cutting portions respectively form a ring to surround the first main shaft and the second main shaft.

[0008] Further, the cross-sections of the first main shaft and the second main shaft at the first cutting portions and the second cutting portions are hexagonal.

[0009] Further, the cross-sections of the first main shaft and the second main shaft at other places except the first cutting portions and the second cutting portions are circular, and the radius of the circle is smaller than the inradius of the hexagon.

[0010] Further, between two adjacent first main blades and between two adjacent second main blades, on the contours of the first main shaft and the second main shaft, a plurality of pairs of auxiliary blades arranged radially opposite are respectively provided.

[0011] Further, the height of the auxiliary blades is lower than the height of the first main blades and the second main blades.

[0012] Further, the first cutting portions and the second cutting portions respectively have a plurality of teeth with an arched profile. These teeth are inclined in the direction of the other rotor in the rotation direction of the rotor, and the teeth on different first cutting portions or second cutting portions are staggeredly arranged in the circumferential direction of the first main shaft or the second main shaft.

[0013] Further, the first cutting portions, the second cutting portions and the auxiliary blades are fixed on the first main shaft or the second main shaft by a plurality of fastening screws.

[0014] Furthermore, the first main shaft and the second main shaft are single-piece rod machined parts.

[0015] The technical solutions provided by the embodiments of the present invention have the following beneficial effects:

[0016] (1) In the present invention, auxiliary blades are provided between adjacent first main blades of the first rotor and between adjacent second main blades of the second rotor. The multiple auxiliary blades are arranged staggeredly in the circumferential direction of the first main shaft and the second main shaft. The auxiliary blades on one rotor among the first rotor and the second rotor cooperate with the main blades on the other rotor to assist in cutting and crushing waste materials, thereby improving the cutting ability of the blades of the rotor, preventing the blades of the rotor from pressing the waste materials on the other rotor and causing the reverse rotation of the rotor and the blocking of the cutting action, and reducing the occurrence of faults in the crusher.

[0017] (2) By setting the first main shaft and the second main shaft to be single-piece and made from a single rod through appropriate rough machining and straightening, the main shaft of the crusher has greater torsional and bending resistance, and the assembly process of the crusher is faster and simpler. In addition, the single-piece first main shaft and second main shaft allow for higher cutting precision of the first main blade and the second main blade, so the wear is smaller, and the maintenance cost of the double-rotor crusher is lower. Description of the Drawings

[0018] Figure 1 is a three-dimensional structural schematic diagram of the double-rotor crusher provided by the embodiment of the present invention.

[0019] Figure 2 is a top view of the double-rotor crusher provided by the embodiment of the present invention.

[0020] Figure 3 is a cross-sectional view of the double-rotor crusher provided by the embodiment of the present invention.

[0021] Among them, 10 - double-rotor crusher; 11 - housing; 12 - crushing chamber; 13 - opening; 14 - first rotor; 15 - second rotor; 16a - first main shaft; 16b - second main shaft; 17a - first main blade; 17b - second main blade; 18a - first cutting part; 18b - second cutting part; 19 - auxiliary blade; 20 - tooth; 21 - fastening screw. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the drawings. The following describes a relatively better one among the multiple possible embodiments of the present invention, aiming to provide a basic understanding of the present invention, but not aiming to identify the key or decisive elements of the present invention or limit the scope to be protected.

[0023] Reference Figures 1 to 3 As shown, the present utility model provides a double-rotor crusher 10. The double-rotor crusher 10 includes a housing 11, which is a box structure and has a crushing chamber 12. The housing 11 is provided with an opening 13 for waste to enter the crushing chamber 12. Inside the crushing chamber 12, there is a first rotor 14 and a second rotor 15 parallel to the first rotor 14. The first rotor 14 and the second rotor 15 rotate in opposite directions, as Figure 3 shown by the arrows M1 and M2 in

[0024] Each of the first rotor 14 and the second rotor 15 includes a main shaft, namely the first main shaft 16a and the second main shaft 16b respectively. Along the axial direction, a plurality of first main blades 17a and second main blades 17b are respectively and fixedly arranged at intervals on the first main shaft 16a and the second main shaft 16b.

[0025] In a preferred embodiment, the first main shaft 16a and the second main shaft 16b completely pass through the housing 11 and the crushing chamber 12, and their axes are located in a plane parallel to the plane of the opening 13.

[0026] The first main shaft 16a of the first rotor 14 and the second main shaft 16b of the second rotor 15 are about 10 centimeters apart. The first rotor 14 and the second rotor 15 are driven by a motor (not shown in the figure).

[0027] The first main blades 17a and the second main blades 17b respectively have a plurality of first cutting parts 18a and a plurality of second cutting parts 18b. The plurality of first cutting parts 18a and the plurality of second cutting parts 18b respectively form a ring to surround the first main shaft 16a of the first rotor 14 and the second main shaft 16b of the second rotor 15. The cross-sections of the first main shaft 16a and the second main shaft 16b at the first cutting parts 18a and the second cutting parts 18b are substantially hexagonal. It should be understood that the cross-section refers to the section perpendicular to the axes of the first main shaft 16a and the second main shaft 16b.

[0028] In a preferred embodiment, the cross-sections of the first main shaft 16a and the second main shaft 16b at the first cutting parts 18a and the second cutting parts 18b are substantially hexagonal, while at other places, they are circular cross-sections with smaller sizes.

[0029] The plurality of first main blades 17a (i.e., the first cutting parts 18a) of the first rotor 14 and the plurality of second main blades 17b (i.e., the second cutting parts 18b) of the second rotor 15 are alternately arranged along the extending direction of the double-rotor crusher 10.

[0030] In the double-rotor crusher 10, auxiliary blades 19 are respectively arranged between adjacent first main blades 17a and between adjacent second main blades 17b of the first rotor 14 and the second rotor 15. These auxiliary blades 19 are respectively fixed on the first main shaft 16a and the second main shaft 16b. Each auxiliary blade 19 is located between an adjacent first cutting part 18a or an adjacent second cutting part 18b and extends parallel to the extension direction of the first main shaft 16a or the second main shaft 16b therebetween. These auxiliary blades 19 are arranged staggeredly in the circumferential direction along the extension direction of the first main shaft 16a and the second main shaft 16b.

[0031] In a preferred embodiment, between two adjacent first cutting parts 18a and two adjacent second cutting parts 18b, on the contours of the first main shaft 16a and the second main shaft 16b, for example, on Figure 3 the second rotor 15, multiple pairs of auxiliary blades 19 arranged radially opposite are provided.

[0032] The height of the auxiliary blades 19 is lower than the heights of the first main blades 17a and the second main blades 17b. In a preferred embodiment, the height of these auxiliary blades 19 is about 2 cm. It should be understood that the height refers to the radial dimension perpendicular to the surface of the first main shaft 16a or the second main shaft 16b.

[0033] These auxiliary blades 19 contribute to further pulverizing the waste material and pushing the fragments through the space between the first rotor 14 and the second rotor 15.

[0034] The first cutting part 18a and the second cutting part 18b have teeth 20 with an arched profile. These teeth 20 are inclined in the direction of the other rotor in the rotation direction of the rotor. The teeth 20 on different first cutting parts 18a or second cutting parts 18b are arranged staggeredly in the circumferential direction along the extension direction of the first main shaft 16a or the second main shaft 16b to improve the grasping force of the first main blades 17a and the second main blades 17b on the waste material.

[0035] In a preferred embodiment, the first cutting part 18a, the second cutting part 18b and the auxiliary blades 19 are fixed to the first main shaft 16a or the second main shaft 16b by a plurality of fastening screws 21.

[0036] In a preferred embodiment, the first main shaft 16a and the second main shaft 16b are single-piece rod machined parts, made from a single rod with a diameter of approximately 70 cm through appropriate rough machining and straightening. This allows for greater torsional and bending resistance than the main shafts of known types of shredders, and the assembly process of the shredder is faster and simpler. In addition, the single-piece first main shaft 16a and second main shaft 16b allow for higher cutting accuracy of the first main blade 17a and the second main blade 17b, and thus less wear, because compared with the rotors of known types of shredders, the gaps related to the tolerances of the mechanical elements forming the rotor are smaller. It is worth noting that the less wear of the first main blade 17a and the second main blade 17b also means that the maintenance cost of the double-rotor shredder 10 is lower compared with similar known types of shredders.

[0037] In some implementation variants, not shown in the figures, blades are provided on the inner wall of the shredding chamber 12, which extend towards the rotor to enhance the shredding of the waste.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A double-rotor crusher, comprising a housing having a crushing chamber, a first rotor and a second rotor parallel to the first rotor are provided in the crushing chamber, the first rotor and the second rotor rotate in opposite directions, the first rotor and the second rotor respectively include a first main shaft and a second main shaft, and a plurality of first main blades and a plurality of second main blades are respectively and axially fixed at intervals on the first main shaft and the second main shaft; characterized in that, Auxiliary blades are provided between adjacent first main blades of the first rotor and between adjacent second main blades of the second rotor, and a plurality of the auxiliary blades are arranged staggeredly in the circumferential direction of the first main shaft and the second main shaft respectively.

2. The double-rotor crusher according to claim 1, wherein: A plurality of first main blades of the first rotor and a plurality of second main blades of the second rotor are arranged alternately along the extending direction of the double-rotor crusher.

3. The double-rotor crusher according to claim 1, characterized in that: The first main blade and the second main blade respectively have a plurality of first cutting portions and a plurality of second cutting portions, and the plurality of first cutting portions and the plurality of second cutting portions respectively form a ring to surround the first main shaft and the second main shaft.

4. The double-rotor grinder according to claim 3, characterized in that: The cross sections of the first main shaft and the second main shaft at the first cutting portion and the second cutting portion are hexagonal.

5. The double-rotor crusher according to claim 4, characterized in that: The cross sections of the first main shaft and the second main shaft at other places except the first cutting portion and the second cutting portion are circular, and the radius of the circle is smaller than the inradius of the hexagon.

6. The double-rotor grinder according to claim 1, wherein: Between two adjacent first main blades and two adjacent second main blades, a plurality of pairs of auxiliary blades arranged radially opposite are respectively provided on the contours of the first main shaft and the second main shaft.

7. The double-rotor crusher according to claim 1, wherein: The height of the auxiliary blade is lower than the heights of the first main blade and the second main blade.

8. The double-rotor grinder according to claim 3, characterized in that: The first cutting portion and the second cutting portion respectively have a plurality of teeth with an arched profile, and these teeth are inclined in the direction of the other rotor in the rotation direction of the rotor, and the teeth on different first cutting portions or second cutting portions are arranged staggeredly in the circumferential direction of the first main shaft or the second main shaft.

9. The double-rotor grinder according to claim 3, characterized in that: The first cutting portion, the second cutting portion and the auxiliary blade are fixed to the first main shaft or the second main shaft by a plurality of fastening screws.

10. The double-rotor crusher according to claim 1, wherein: The first main shaft and the second main shaft are single-piece rod machined parts.

Images