A double-roll crusher and a crushing method for recycled asphalt mixture

Abstract

A double-roll crusher and a method for crushing recycled asphalt mixture. A double-roll crusher includes two special-shaped rollers arranged opposite to each other. The cross-section of the special-shaped rollers is a rounded triangle. The special-shaped rollers include three sections of roller surfaces connected to each other. There is an arc transition between two adjacent roller surfaces. A crushing chamber is formed between the two special-shaped rollers. The crushing chamber includes a feed port and a discharge port. The special-shaped rollers rotate to make the width of the feed port change from large to small in a continuous cycle and to make the width of the discharge port change from small to large in a continuous cycle. The cross-section of the special-shaped rollers is a rounded triangle. Compared with traditional cylindrical crushing rollers, under the same roller spacing and the same maximum external dimensions of the crushing rollers, the special-shaped rollers have a larger feed port, which can make the particle size specification of the recycled asphalt mixture crushed by the crusher larger, the adaptability is wider, and the efficiency is higher.

Description

Technical Field

[0001] The invention belongs to the field of crushers, and in particular relates to a double-roll crusher and a crushing method for recycled asphalt mixture. Background Art

[0002] The crushing roller in the traditional double-roll crusher adopts a cylindrical structure. When the crushing roller diameter and the roller spacing are constant, the RAP size of the feed material is determined. The problem caused by this is that the size of the crushed RAP is limited to a certain range, and it is not suitable for large-sized RAP, such as excavated materials with a size greater than 500mm. If large-sized RAP needs to be crushed, the roller diameter must be increased to cope with related complex working conditions, thereby increasing equipment costs and energy consumption. Summary of the invention

[0003] The object of the present invention is to overcome the shortcomings of the prior art and provide a double-roll crusher. Another object of the present invention is to provide a method for crushing recycled asphalt mixture using the above crusher.

[0004] The present invention adopts the following technical solution:

[0005] A double-roll crusher comprises two shaped rollers arranged opposite to each other, the cross section of the shaped rollers is a rounded triangle, the shaped rollers comprise three sections of roller surfaces connected to each other, an arc transition is formed between two adjacent roller surfaces, a crushing chamber is formed between the two shaped rollers, the crushing chamber comprises a feed port and a discharge port, the rotation of the shaped rollers causes the width diameter of the feed port to change from large to small in a continuous cycle, and causes the width diameter of the discharge port to change from small to large in a continuous cycle.

[0006] Furthermore, the roller surface is arranged in a spiral shape, and the spiral directions of the roller surfaces of the two special-shaped rollers are opposite.

[0007] Furthermore, the spiral lead of the roller surface is 2-4 times the length of the roller surface.

[0008] Furthermore, the roller surface is provided with a plurality of crushing teeth arranged at intervals along its axial direction, and the crushing teeth are spirally arranged on the roller surface along the axial direction of the special-shaped roller.

[0009] Furthermore, the special-shaped roller also includes a plurality of crushing tooth groups arranged on the roller surface, and the plurality of crushing tooth groups are arranged on the roller surface at intervals along the axial direction of the special-shaped roller.

[0010] Furthermore, the crushing tooth group is spirally arranged on the roller surface.

[0011] Furthermore, the crushing tooth group includes a plurality of crushing teeth arranged along a spiral line.

[0012] Furthermore, the crushing tooth group includes a plurality of crushing teeth distributed circumferentially on the roller surface.

[0013] Furthermore, the shaped roller also includes a plurality of crushing groove groups arranged on the roller surface and arranged in an axial direction of the shaped roller at intervals, and the crushing groove group includes a plurality of crushing grooves distributed circumferentially on the roller surface.

[0014] A method for crushing a recycled asphalt mixture comprises the following steps:

[0015] The recycled asphalt mixture enters the crushing chamber through the feed port, and the two special-shaped rollers rotate synchronously. The width of the feed port gradually decreases, and the special-shaped rollers clamp the recycled asphalt mixture and crush it into crushed waste recycled asphalt mixture of different particle sizes. The width of the discharge port gradually increases as the width of the feed port gradually decreases, so that the crushed recycled asphalt mixture with a particle size smaller than the width of the discharge port passes through the discharge port to obtain crushed recycled asphalt mixture of different particle sizes.

[0016] From the above description of the present invention, it can be seen that compared with the prior art, the present invention has the following beneficial effects: the cross section of the special-shaped roller is a rounded triangle. Compared with the traditional cylindrical crushing roller, under the condition of the same roller spacing and the same maximum outer dimensions of the crushing roller, the special-shaped roller has a larger feed port, which can make the particle size specification of the recycled asphalt mixture crushed by the crusher larger, the adaptability is wider, and the efficiency is higher;

[0017] During the rotation of the special-shaped roller, the regenerated asphalt mixture is crushed to form crushed regenerated asphalt mixtures of different particle sizes. The width of the discharge port gradually increases as the width of the feed port gradually decreases, so that the crushed regenerated asphalt mixture with a particle size smaller than the width of the discharge port passes through the discharge port to obtain crushed regenerated asphalt mixtures of different particle sizes. In the prior art, when recycling the regenerated asphalt mixture, it is necessary to select crushed regenerated asphalt mixtures of different particle sizes according to different production needs. The crusher of the present application can obtain asphalt mixtures of different particle sizes through one crushing to meet different production needs.

[0018] The roller surface is spirally arranged, and the spiral directions of the two special-shaped rollers are opposite, so that the special-shaped rollers can form relative meshing with each other, making the width and diameter of each section of the feed port along the axial distribution of the special-shaped rollers inconsistent, and the asphalt mixture can be quickly rolled into the crushing chamber to realize the crushing operation, which can adapt to recycled asphalt mixture with larger particle size. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the first embodiment of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the first embodiment of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 The structure of the second embodiment of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 4 The structure of the second embodiment of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 5 The structure of the third embodiment of the present invention is shown in FIG. Figure 1 ;

[0024] Figure 6 The structure of the third embodiment of the present invention is shown in FIG. Figure 2 ;

[0025] Figure 7 The structure of the fourth embodiment of the present invention is shown in FIG. Figure 1 ;

[0026] Figure 8 The structure of the fourth embodiment of the present invention is shown in FIG. Figure 2 ;

[0027] Fig. 9 The structure of the fifth embodiment of the present invention is shown in FIG. Figure 1 ;

[0028] Fig.10 The structure of the fifth embodiment of the present invention is shown in FIG. Figure 2 ;

[0029] Fig.11 The structure of the sixth embodiment of the present invention is shown in FIG. Figure 1 ;

[0030] Fig.12 The structure of the sixth embodiment of the present invention is shown in FIG. Figure 2 ;

[0031] Fig.13 The structure of the sixth embodiment of the present invention is shown in FIG. Figure 3 ;

[0032] Fig.14 The structure of the seventh embodiment of the present invention is shown in FIG. Figure 1 ;

[0033] Fig.15 The structure of the seventh embodiment of the present invention is shown in FIG. Figure 2 ;

[0034] Fig.16 The structure of the seventh embodiment of the present invention is shown in FIG. Figure 3 ;

[0035] Fig.17 It is a schematic diagram of the structure of a cylindrical crushing roller in the prior art;

[0036] Fig.18 The first embodiment is shown in FIG. Figure 1 ;

[0037] Fig.19 The first embodiment is shown in FIG. Figure 2 ;

[0038] Fig. 20 The first embodiment is shown in FIG. Figure 3 ;

[0039] Fig.21 The first embodiment is shown in FIG. Figure 4 ;

[0040] Fig. 22 The first embodiment is shown in FIG. Figure 5 ;

[0041] Fig.23 The first embodiment is shown in FIG. Figure 6 ;

[0042] Fig.24 The first embodiment is shown in FIG. Figure 7 ;

[0043] Fig.25 The first embodiment is shown in FIG. Figure 8 ;

[0044] Fig.26 The first embodiment is shown in FIG. Figure 9 ;

[0045] Fig. 27 The first embodiment is shown in FIG. Figure 10 ;

[0046] In the figure, 1-special-shaped roller, 11-roller surface, 12-arc transition, 13-crushing tooth group, 131-crushing tooth, 14-crushing groove group, 141-crushing groove group, 2-crushing chamber, 21-feeding port, 22-discharging port, 3-crushing roller. DETAILED DESCRIPTION

[0047] The present invention is further described below through specific implementation modes.

[0048] Reference Figures 1 to 27 As shown, a double-roll crusher includes two shaped rollers 1 arranged opposite to each other, a recycled asphalt mixture crushing chamber 2 is formed between the two shaped rollers 1, and the crushing chamber 2 includes a feed port 21 and a discharge port 22.

[0049] The cross section of the special-shaped roller 1 is a rounded triangle. Compared with the traditional cylindrical crushing roller 3, under the condition of the same roller spacing and the same maximum outer size of the crushing roller, the special-shaped roller 1 has a larger feed port 21, which can make the particle size specification of the recycled asphalt mixture crushed by the crusher larger, with a wider adaptability and higher efficiency. The special-shaped roller 1 includes three sections of roller surfaces 11 connected to each other, and there is an arc transition 12 between two adjacent roller surfaces 11. When the two special-shaped rollers 1 are opposite to each other, the roller surface 11 of one special-shaped roller 1 is completely opposite to the roller surface 11 of the other special-shaped roller 1. When working, the two special-shaped rollers 1 rotate synchronously to make the width of the feed port 21 change from large to small in a continuous cycle and make the width of the discharge port 22 change from small to large in a continuous cycle. Asphalt mixtures of different particle sizes can be obtained through one crushing to meet different production needs.

[0050] First embodiment

[0051] Reference Figure 1 to Figure 2 As shown, a double-roll crusher includes two shaped rollers 1 arranged opposite to each other, a recycled asphalt mixture crushing chamber 2 is formed between the two shaped rollers 1, and the crushing chamber 2 includes a feed port 21 and a discharge port 22.

[0052] The cross section of the special-shaped roller 1 is a rounded triangle, including three sections of circular arc roller surfaces 11 connected to each other, and an arc transition 12 is formed between two adjacent roller surfaces 11. When the two special-shaped rollers 1 are opposite to each other, the roller surface 11 of one special-shaped roller 1 is completely opposite to the roller surface 11 of the other special-shaped roller 1. When working, the two special-shaped rollers 1 rotate synchronously to make the width diameter of the feed port 21 change from large to small in a continuous cycle and make the width diameter of the discharge port 22 change from small to large in a continuous cycle. The width diameter of the feed port 21 gradually decreases, and the special-shaped roller 1 clamps the recycled asphalt mixture and crushes it into crushed waste recycled asphalt mixture of different particle sizes. The width diameter of the discharge port 22 gradually increases as the width diameter of the feed port 21 gradually decreases, so that the crushed recycled asphalt mixture with a particle size smaller than the width diameter of the discharge port 22 passes through the discharge port 22 to obtain crushed recycled asphalt mixture of different particle sizes to meet different production needs.

[0053] Second embodiment

[0054] The second embodiment of the present application has a structure that is basically the same as the first embodiment, except that: a plurality of crushing tooth groups 13 are arranged on the arc roller surface 11, and the plurality of crushing tooth groups 13 are arranged on the roller surface 11 at intervals along the axial direction of the special-shaped roller 1. The crushing tooth group 13 includes four crushing teeth 131 distributed on the roller surface 11 along the circumference of the special-shaped roller 1. The crushing teeth 131 are long strip-shaped crushing teeth, and the crushing teeth 131 are extended along the circumference of the special-shaped roller 1 and are arranged on the roller surface 11. A gap greater than the width of the crushing teeth 131 is formed between two adjacent crushing tooth groups 13. When working, the crushing teeth 131 of the two special-shaped rollers 1 can mesh with each other to deeply crush the recycled asphalt mixture to obtain a crushed recycled asphalt mixture with a more subdivided particle size.

[0055] Third embodiment

[0056] The third embodiment of the present application has a structure that is basically the same as that of the second embodiment, except that the crushing tooth group 13 includes a plurality of crushing teeth 131 distributed on the roller surface 11 along the circumference of the special-shaped roller 1, and the crushing teeth 131 are long strip-shaped crushing teeth. The crushing teeth 131 are axially extending on the roller surface 11 along the special-shaped roller 1. The length of the crushing teeth 131 of this embodiment is less than that of the crushing teeth 131 in the second embodiment, and a gap greater than the width of the crushing teeth 131 is formed between two adjacent crushing teeth 131. When working, the crushing teeth 131 of the two special-shaped rollers 1 can mesh with each other to deeply crush the recycled asphalt mixture and obtain a crushed recycled asphalt mixture with a more subdivided particle size.

[0057] Fourth embodiment

[0058] The fourth embodiment of the present application has a structure that is basically the same as the first embodiment, except that: a plurality of crushing tooth groups 13 are arranged on the arc roller surface 11, and the plurality of crushing tooth groups 13 are arranged on the roller surface 11 at intervals along the axial direction of the special-shaped roller 1, and the crushing tooth groups 13 are spirally arranged on the roller surface 11, and the crushing tooth group 13 includes a plurality of crushing teeth 131 arranged along the spiral line of the crushing tooth group 13, and the crushing teeth 131 are long strip-shaped crushing teeth, and the crushing teeth 131 are extended along the spiral line of the crushing tooth group 13 and arranged on the roller surface 11, and a gap greater than the width of the crushing teeth 131 is formed between adjacent crushing tooth groups 13. When working, the crushing teeth 131 of the two special-shaped rollers 1 are meshed with each other to deeply crush the regenerated asphalt mixture, and the crushing tooth group 13 is spirally arranged on the roller surface 11, which is conducive to the regenerated asphalt mixture to quickly squeeze into the crushing chamber 2 for crushing, thereby realizing the crushing operation of the regenerated asphalt mixture.

[0059] Fifth embodiment

[0060] The fifth embodiment of the present application has a structure that is basically the same as the first embodiment, except that: a plurality of crushing groove groups 14 are arranged on the arc roller surface 11 and are spaced apart along the axial direction of the special-shaped roller 1. The crushing groove group 14 includes a plurality of crushing grooves 141 axially distributed on the roller surface 11. Compared with the first embodiment, the fifth embodiment can crush recycled asphalt mixtures with larger particle sizes and can crush asphalt mixtures with more different particle sizes to meet different production needs.

[0061] Sixth embodiment

[0062] A double-roll crusher comprises two shaped rollers 1 which are arranged opposite to each other. A regenerated asphalt mixture crushing chamber 2 is formed between the two shaped rollers 1. The crushing chamber 2 comprises a feed port 21 and a discharge port 22.

[0063] The cross section of the special-shaped roller 1 is a rounded triangle, including three sections of roller surfaces 11 connected to each other, with an arc transition 12 between two adjacent roller surfaces 11. The roller surface 11 is spirally arranged on the special-shaped roller 1, and the spiral lead of the roller surface 11 is 2-4 times the length of the roller surface 11. The spiral directions of the roller surfaces 11 of the two special-shaped rollers are opposite, so that the two special-shaped rollers 1 can form relative engagement with each other. Compared with the first to fifth embodiments, the roller surface 11 is spirally arranged, so that the width and diameter of each section of the feed port 21 and the discharge port 22 of the sixth embodiment along the axial direction of the special-shaped roller are inconsistent, so that the asphalt mixture can be quickly rolled into the crushing chamber 2 to realize the crushing operation, which can adapt to the crushing operation of recycled asphalt mixture with a larger particle size.

[0064] Seventh embodiment

[0065] The seventh embodiment of the present application is basically the same in structure as the sixth embodiment, and the difference lies in that a plurality of crushing teeth 131 are arranged on the roller surface 11, and the crushing teeth 131 are strip-shaped crushing teeth. The crushing teeth 131 are spirally arranged on the roller surface 11 along the axial direction of the special-shaped roller 1, and a gap greater than the width of the crushing teeth 131 is formed between two adjacent crushing teeth 131. When working, the crushing teeth 131 of the two special-shaped rollers 1 are meshed with each other to perform deep crushing of the regenerated asphalt mixture. The crushing teeth 131 are spirally arranged on the roller surface 11, which is conducive to the regenerated asphalt mixture to quickly squeeze into the crushing chamber 2 for crushing, thereby realizing the crushing operation of the regenerated asphalt mixture. At the same time, the crushing teeth 131 are strip-shaped crushing teeth, which can lock the regenerated asphalt mixture on the special-shaped roller 1 to prevent the block-shaped regenerated asphalt mixture from detaching and affecting the crushing efficiency.

[0066] A method for crushing a recycled asphalt mixture comprises the following steps:

[0067] The recycled asphalt mixture enters the crushing chamber 2 through the feed port 21, and the two special-shaped rollers 1 rotate synchronously to gradually reduce the width of the feed port 21. The special-shaped rollers 1 clamp the recycled asphalt mixture and crush it into crushed waste recycled asphalt mixture of different particle sizes. The width of the discharge port 22 gradually increases as the width of the feed port 21 gradually decreases, so that the crushed recycled asphalt mixture with a particle size smaller than the width of the discharge port 22 passes through the discharge port 22 to obtain crushed recycled asphalt mixture of different particle sizes.

[0068] The cross-section of the special-shaped roller 1 is a rounded triangle. Compared with the traditional cylindrical crushing roller 3, under the condition of the same roller spacing and the same maximum outer size of the crushing roller, the special-shaped roller 1 has a larger feed port 21, which can make the particle size specification of the recycled asphalt mixture crushed by the crusher larger, with a wider adaptability and higher efficiency; during the synchronous rotation of the special-shaped roller 1, the recycled asphalt mixture is crushed to form crushed recycled asphalt mixture of different particle sizes, and the width of the discharge port 22 gradually increases as the width of the feed port 21 gradually decreases, so that the crushed recycled asphalt mixture with a particle size smaller than the width of the discharge port 22 passes through the discharge port 22 to obtain crushed recycled asphalt mixture of different particle sizes. In the prior art, when recycling the recycled asphalt mixture, it is necessary to select crushed recycled asphalt mixture of different particle sizes according to different production needs. The crusher of the present application can obtain asphalt mixture of different particle sizes through one crushing to meet different production needs.

[0069] Compared with the traditional crusher, the double-roll crusher of the present application has a larger feed port with the special-shaped rollers under the conditions of the same roller spacing and the same maximum external dimensions of the crushing rollers, so that the particle size of the recycled asphalt mixture crushed by the crusher can be larger and the adaptability can be wider. At the same time, asphalt mixtures of different particle sizes can be obtained through one crushing to meet different production needs.

[0070] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A double-roll crusher, characterized in that: It includes two special-shaped rollers arranged opposite to each other. The cross-section of the special-shaped rollers is a rounded triangle. The special-shaped rollers include three sections of roller surfaces connected to each other. There is an arc transition between two adjacent roller surfaces. A crushing chamber is formed between the two special-shaped rollers. The crushing chamber includes a feed port and a discharge port. The rotation of the special-shaped rollers causes the width of the feed port to change from large to small in a continuous cycle, and causes the width of the discharge port to change from small to large in a continuous cycle.

2. A double-roll crusher according to claim 1, characterized in that: The roller surface is arranged in a spiral shape, and the spiral directions of the roller surfaces of the two special-shaped rollers are opposite.

3. A double-roll crusher according to claim 2, characterized in that: The spiral lead of the roller surface is 2-4 times the length of the roller surface.

4. A double-roll crusher according to claim 2, characterized in that: The roller surface is provided with a plurality of crushing teeth arranged at intervals along the axial direction thereof, and the crushing teeth are spirally arranged on the roller surface along the axial direction of the special-shaped roller.

5. A double-roll crusher according to claim 1, characterized in that: The special-shaped roller further comprises a plurality of crushing tooth groups arranged on the roller surface, and the plurality of crushing tooth groups are arranged on the roller surface at intervals along the axial direction of the special-shaped roller.

6. A double-roll crusher according to claim 5, characterized in that: The crushing tooth group is spirally arranged on the roller surface.

7. A double-roll crusher according to claim 6, characterized in that: The crushing tooth group includes a plurality of crushing teeth arranged along a spiral line.

8. A double-roll crusher according to claim 5, characterized in that: The crushing tooth group includes a plurality of crushing teeth distributed circumferentially on the roller surface.

9. A double-roll crusher according to claim 1, characterized in that: The profiled roller further comprises a plurality of crushing groove groups arranged on the roller surface and arranged in an axial direction of the profiled roller at intervals, and the crushing groove groups comprise a plurality of crushing grooves distributed circumferentially on the roller surface.

10. A method for crushing recycled asphalt mixture using the double-roll crusher according to claim 1, characterized in that: The steps include: The recycled asphalt mixture enters the crushing chamber through the feed port, and the two special-shaped rollers rotate synchronously. The width of the feed port gradually decreases, and the special-shaped rollers clamp the recycled asphalt mixture and crush it into crushed waste recycled asphalt mixture of different particle sizes. The width of the discharge port gradually increases as the width of the feed port gradually decreases, so that the crushed recycled asphalt mixture with a particle size smaller than the width of the discharge port passes through the discharge port to obtain crushed recycled asphalt mixture of different particle sizes.

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