A drum-type multi-knife-shaft processing device for surface strengthening of recycled aggregates

Abstract

The present invention discloses a drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates, which comprises a main body frame. A drum is arranged on the main body frame. The top of the drum is a feed inlet, and the bottom is a sieve plate provided with a discharge door. A main shaft is arranged at the center of the drum. The main shaft is connected to three sub-shafts through a hollow shaft connecting frame. The drum rotates driven by a first motor, and the main shaft rotates driven by a second motor. The main shaft then drives the three sub-shafts to rotate. A spiral blade is arranged on the outer circle of the hollow shaft of the hollow shaft connecting frame. A first cutter, a second cutter and a third cutter are sequentially arranged on each sub-shaft from top to bottom. During the rotation of the first cutter, a circumferential cutting effect can be caused on the aggregates. During the rotation of the second cutter, a circumferential scraping effect can be caused on the aggregates. During the rotation of the third cutter, an axial cutting effect can be caused on the aggregates.

Description

Technical Field

[0001] The present invention belongs to the technical field of reinforced treatment of recycled aggregates, and particularly relates to a drum-type multi-knife-axis treatment device for surface strengthening of recycled aggregates. Background Art

[0002] In the prior art, the aggregates formed by crushing and grading waste asphalt concrete are called recycled aggregates. However, due to a large amount of aged asphalt adhering to their surfaces, there are significant differences in the overall performance of recycled aggregates compared with natural aggregates. If directly used in the production of recycled asphalt concrete, it will cause problems such as low utilization rate of recycled aggregates and poor mechanical properties of recycled asphalt concrete. Summary of the Invention

[0003] Aiming at the problems existing in the current utilization of recycled aggregates, the present invention provides a drum-type multi-knife-axis treatment device for surface strengthening of recycled aggregates. By adopting scraping and cutting methods, and utilizing the mutual collision and friction of recycled aggregates in the treatment cavity, the aged asphalt attached to the surface of the aggregates is removed, and the surface quality of the aggregates is improved.

[0004] To achieve the above object, the present invention is realized through the following technical solutions:

[0005] An embodiment of the present invention provides a drum-type multi-knife-axis treatment device for surface strengthening of recycled aggregates, including a main body frame. A drum is provided on the main body frame. The top of the drum is a feed inlet, and the bottom is a sieve plate with a discharge door. A main shaft is provided at the center of the drum. The main shaft is connected to three sub-shafts through a hollow shaft connecting frame. The drum rotates driven by a first motor, and the main shaft rotates driven by a second motor. The main shaft then drives the three sub-shafts to rotate. A spiral blade is provided on the outer circle of the hollow shaft of the hollow shaft connecting frame. A first tool, a second tool, and a third tool are sequentially arranged on each sub-shaft from top to bottom. During the rotation of the first tool, it can cause a circumferential cutting effect on the aggregates. During the rotation of the second tool, it can cause a circumferential scraping effect on the aggregates. During the rotation of the third tool, it can cause an axial cutting effect on the aggregates.

[0006] As a further technical solution, the third tool includes a main body, and a plurality of cutting teeth are provided on the outer circle of the main body. The cutting edge is the circumference of the cutting teeth, and during the rotation of the tool, it can cause a circumferential cutting effect on the aggregates.

[0007] As a further technical solution, the second tool includes a main body, and a circle of cuboid tools are provided on the outer circle of the main body. The outermost side of the cuboid tool is the cutting edge, and during the rotation of the tool, it can cause a circumferential scraping effect on the aggregates.

[0008] As a further technical solution, the first tool is a spiral tool, which can exert an axial cutting effect on the aggregate during the rotation of the tool.

[0009] As a further technical solution, spiral blades are also provided at the bottom of each sub-axis.

[0010] As a further technical solution, a first damping spring is provided at the bottom of the first tool.

[0011] As a further technical solution, a second damping spring is provided at the bottom of the second tool.

[0012] As a further technical solution, a number of wear-resistant guiding strips are provided on the inner wall of the drum.

[0013] As a further technical solution, a sieve plate is provided at the bottom of the drum, and the sieve plate is provided with sieve holes and a discharge door.

[0014] As a further technical solution, the hollow shaft connecting frame includes a hollow shaft and three sleeves provided at the lower end of the hollow shaft. The three sleeves are connected to the bottoms of the three sub-axes, and the tops of the three sub-axes are connected to a sub-axis fixing plate provided at the middle position of the hollow shaft.

[0015] The beneficial effects of the above embodiments of the present invention are as follows:

[0016] (1) Each sub-axis is provided with three types of tools. Since the positions of each type of tool are different, the surface pressure on the aggregate in the corresponding treatment area is also different. Different forms of cutting edges are set according to the concept of hierarchical gradient treatment. During the working process, the aggregate is processed by scraping and cutting through its own high-speed rotation, and the processing efficiency is higher;

[0017] (2) The present invention adopts the form of the self-rotation of the sub-axis tool and the revolution around the main axis. By combining the two rotation forms, the linear velocity at the edge of the cutting edge is increased, so that the tool can contact the aggregate more fully, increasing the processing area and processing effect;

[0018] (3) A large number of wear-resistant guiding strips are provided in the drum, which can lift the aggregate, and at the same time, large-scale scraping treatment can be carried out on the aggregate outside the treatment chamber. Moreover, the rotation direction of the drum is opposite to the rotation direction of the main axis, making the treatment of the aggregate in the treatment chamber more sufficient;

[0019] (4) Spiral blades are provided on the outer side of the hollow shaft and at the bottom of the sub-axis of the present invention, which have the function of turning the aggregate, so that the aggregate is turned more evenly in the treatment chamber, ensuring that all the aggregate in the treatment chamber can be subjected to peeling treatment. Description of the Drawings

[0020] The accompanying drawings of the specification, which form a part of the present application, are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation to the present application.

[0021] Figure 1 It is a schematic structural diagram of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the main body frame of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the main shaft rotor of the present invention.

[0024] Figure 4 It is a partial sectional view of the main shaft rotor of the present invention.

[0025] Figure 5 It is a schematic structural diagram of the sub-shaft of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the drum part of the present invention.

[0027] Figure 7 It is a sectional view of the overall structure of the present invention.

[0028] In the figure: 1. support, 2. slewing bearing, 3. first motor support, 4. second motor support, 5. first motor, 6. second motor, 7. drum chain, 8. drum rack, 9. gear, 10. first pulley, 11. second pulley, 12. third pulley, 13. fourth pulley, 14. first transmission belt, 15. second transmission belt, 16. main shaft, 17. bucket feeder, 18. drum, 19. hollow shaft connecting frame, 20. sub-shaft fixing plate, 21. main shaft spiral blade, 22. first cutter, 23. first spring, 24. second cutter, 25. second spring, 26. third cutter, 27. sub-shaft spiral blade, 28. sub-shaft, 29. first bevel gear, 30. second bevel gear, 31. first bearing, 32. second bearing, 33. transmission shaft, 34. third bevel gear, 35. fourth bevel gear, 36. wear-resistant guide plate, 37. first bearing seat, 38. second bearing seat, 39. aggregate collection funnel, 40. sieve plate, 41. discharge door, 42. first main shaft fixed bearing, 43. second main shaft fixed bearing. Detailed Description of the Invention

[0029] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the present invention clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof;

[0031] For the convenience of description, if the words "upper", "lower", "left", and "right" appear in the present invention, they only represent the same directions as the upper, lower, left, and right directions of the attached drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0032] Term explanation part: Terms such as "installation", "connection", "connection", and "fixation" in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] As introduced in the background art, there are deficiencies in the prior art. To solve the above technical problems, the present invention proposes a drum-type multi-knife-shaft processing device and method for surface strengthening of recycled aggregates.

[0034] In a typical embodiment of the present invention, as Figure 1 shown, this embodiment discloses a drum-type multi-knife-shaft processing device, including a main body frame, a main shaft rotor, a drum, a driving motor, a bucket feeder, etc.; each structure is connected by connection methods such as bolts or welding;

[0035] Among them, the bracket 1 is used to bear the overall weight and is bolted and fixed to the outer ring of the slewing bearing 2 (the slewing bearing is divided into an inner ring and an outer ring, which can be connected to two components respectively to achieve rotation); the inner ring of the slewing bearing 2 is connected to the drum 18; a feed inlet is provided at the top of the drum 18, and the feed inlet cooperates with the cover plate. The cover plate is fixed by hinges, and the opening and closing of the cover plate are controlled by a buckle; the bottom of the drum 18 is bolted to the inner side of the slewing bearing. A drum rack 8 is welded to the outer wall of the drum 18. The drum rack 8 is annular and fixed to the outer ring of the drum 18, and can be driven by the first motor 5 through a sprocket and a chain 17 to realize the rotation of the drum; further, a number of wear-resistant guide strips 36 are provided on the inner wall of the drum 18, and the number of wear-resistant guide strips 36 is inclined with respect to the axis of the drum 18; during the rotation (counterclockwise rotation) of the drum 18, the wear-resistant guide strips 36 can scrape the aggregate in the processing chamber and drive the aggregate to move obliquely upward to realize the turning and circulation of the aggregate.

[0036] There is a sieve plate 40 at the bottom of the drum 18. The sieve plate 40 is provided with sieve holes and a discharge door. The sieve holes are used to discharge the exfoliated aged asphalt powder, and the discharge door 41 is used to discharge the aggregate (the discharge door 41 is fixed to the sieve plate by hinges and is locked and switched by a buckle).

[0037] A main shaft rotor is arranged inside the drum 18. The main shaft rotor is the core part and is divided into a main shaft 16, a hollow shaft connecting frame 19, a sub-shaft fixing plate 20 and three sub-shafts 28. Among them, the main shaft 16 and the hollow shaft connecting frame 19 are driven by a motor through a belt drive (clockwise rotation). The hollow shaft connecting frame 19 includes a hollow shaft and three sleeves arranged at the lower end of the hollow shaft. The three sleeves are connected to the bottoms of the three sub-shafts 28, and the tops of the three sub-shafts 28 are connected to the sub-shaft fixing plate 20 arranged at the middle position of the hollow shaft.

[0038] As Figure 4 shown, the main shaft 16 and the hollow shaft connecting frame 19 are connected and fixed through the first main shaft fixing bearing 42, the second main shaft fixing bearing 43 and the shaft shoulder fit to ensure that the main shaft 16 can be fixed in the hollow shaft connecting frame 19 and can rotate.

[0039] A bevel gear transmission structure is arranged in the sleeve 18 (the transmission shaft in the sleeve is fixed in the sleeve by two bearings). A first bevel gear 29 is arranged at the lower end of the main shaft 16. The first bevel gear 29 meshes with three second bevel gears 30. Each bevel gear 30 is connected to one end of a transmission shaft 33. The other end of the transmission shaft 33 is connected to a third bevel gear 34. The third bevel gear 34 is fixed to the bottom of the sub-shaft 28. The transmission shaft 33 is supported by a first bearing 31 and a second bearing 32, and the transmission shaft 33, the first bearing 31, the second bearing 32, the first bevel gear 29, the second bevel gear 30 and the third bevel gear 34 are all installed in the sleeve; specifically refer to Figure 4When the main shaft 16 rotates, the three sub-shafts 28 can be driven to rotate through the first bevel gear 29. During the working process, both the rotation of the central main shaft 16 and the rotation of the three sub-shafts 28 and the revolution around the central main shaft 16 can be realized.

[0040] The outer ring of the hollow shaft section between the split shaft fixing plate 20 and the bottom of the split shaft is provided with a spiral blade 27, which can realize the turning of the aggregate (turning the inner aggregate upward and outward).

[0041] A first cutter 22, a second cutter 24, a third cutter 26, and a spiral blade 27 are arranged on each branch shaft 28 from top to bottom; the spiral blade 27 at the bottom is used to shovel up the aggregate on the screen plate to avoid the inability to process the aggregate at the bottom of the cavity; the three branch shafts 28 are all stepped shafts, and a corresponding cutter is installed on each shaft section. The cutter and the branch shaft are connected by a key, and a spring 23 is arranged under the first cutter 22, and a spring 25 is also arranged under the second cutter 24. The springs 23 and 25 can be used for buffering and vibration reduction, and the springs 23 and 25 are positioned by shaft shoulders.

[0042] Since the pressure on the aggregates in the processing chamber is different, the bottom layer of aggregates is also subject to the gravity of other aggregates above, so the force is the greatest. Similarly, the top layer of aggregates is subject to the least force. Therefore, three types of cutters are designed using the concept of layered gradient processing:

[0043] The third tool 26 at the bottom layer is set in a spiral form, with a thick blade, which can ensure that the tool will not break under a large force. The edge of the blade is the outermost contour line of the spiral, and the tool can cause axial cutting action on the aggregate during rotation. Since the bottom aggregate is subjected to a large force and moves relatively slowly, the third tool can form a larger cutting depth at the same rotation speed of the split shaft to perform rough cutting on the aggregate.

[0044] The second tool 24 in the middle includes a main body, and a circle of inclined rectangular tools is set on the outer circle of the main body. The blade edge is one side of the rectangular tool, and the tool can scrape the aggregate in a circumferential direction during rotation. The material in the middle part of the processing chamber is subjected to moderate force, so a rectangular tool body is used, which can withstand a certain load and has a certain degree of sharpness.

[0045] The first cutter 22 at the top includes a main body, and a circle of cutting teeth is arranged on the outer ring of the main body. The edge of the cutting teeth is the circumference of the cutting teeth. The cutter can cause circumferential cutting action on the aggregate during rotation. Since the upper material is subjected to less force, the aggregate will move upward when subjected to force, so a relatively sharp edge is not easy to wear, and the aggregate can be cut relatively finely.

[0046] The materials in the processing cavity are successively subjected to rough cutting, scraping, and relatively fine cutting, which can maximize the peeling of the aged asphalt on the surface and achieve the effect of aggregate strengthening.

[0047] Further, the above-mentioned main shaft 16 is inserted into the hollow shaft. A first pulley 10 and a second pulley 11 are installed at the top of the main shaft 16. A third pulley 12 and a fourth pulley 13 are installed on the output shaft of the second motor 6. The first pulley 10 and the third pulley 12 are connected by a first transmission belt 14, and the second pulley 11 and the fourth pulley 13 are connected by a second transmission belt 15.

[0048] Further, the above-mentioned first motor and second motor are respectively distributed on both sides of the drum, making the operation of the whole device stable.

[0049] Further, the bucket feeder is located at the rear of the whole device and is used to feed materials into the processing cavity of the drum 18.

[0050] Further, the main body frame includes a bracket 1. The drum 18 is installed on the bracket 1. A first motor bracket 3 and a second motor bracket 4 are installed at the top of the bracket 1. The first motor bracket 3 is used to install the first motor 5, and the second motor bracket 4 is used to install the second motor 6. The bottom of the bracket 1 is an aggregate collection funnel 39.

[0051] The present invention further provides a method for strengthening the treatment of recycled aggregates, including the following steps:

[0052] (1) First, open the feed plate, start the feeder and the main shaft motor, and feed the recycled aggregates into the processing cavity until the aggregates are higher than the upper connecting plate. Then stop the feeder and close the feed plate.

[0053] (2) Then, open the drum motor and start to strengthen the treatment of the aggregates in the processing cavity to remove the aged asphalt on the surface of the aggregates.

[0054] (3) Finally, after a certain period of treatment, close the drum motor, open the discharge door, and discharge the aggregates in the processing cavity. The aggregates are discharged along the aggregate collection funnel until all the aggregates are discharged, and then close the main shaft motor to complete the surface strengthening of the recycled aggregates this time.

[0055] Finally, it should also be noted that relative terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0056] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates, characterized in that, it includes a main frame, on which a drum is arranged. The top of the drum is a feed inlet, and the bottom is a sieve plate with a discharge door; a main shaft is arranged in the center of the drum. The main shaft is connected to three sub-shafts through a hollow shaft connecting frame. The drum rotates driven by a first motor, and the main shaft rotates driven by a second motor. The main shaft then drives the three sub-shafts to rotate; a spiral blade is arranged on the outer ring of the hollow shaft of the hollow shaft connecting frame. On each sub-shaft, a first cutter, a second cutter, and a third cutter are arranged in sequence from top to bottom; during the rotation of the first cutter, it can cause a circumferential cutting effect on the aggregates; during the rotation of the second cutter, it can cause a circumferential scraping effect on the aggregates. The second cutter includes a main body, and a circle of cuboid cutters is arranged on the outer ring of the main body. The outermost side of the cuboid cutter is a cutting edge, and during the rotation of the cutter, it can cause a circumferential scraping effect on the aggregates; during the rotation of the third cutter, it can cause an axial cutting effect on the aggregates.

2. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, the first cutter includes a main body, and a plurality of cutting teeth are arranged on the outer ring of the main body. The cutting edge is the circumference of the cutting teeth, and during the rotation of the cutter, it can cause a circumferential cutting effect on the aggregates.

3. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, the third cutter is a spiral cutter, and during the rotation of the cutter, it can cause an axial cutting effect on the aggregates.

4. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, spiral blades are also arranged at the bottom of each sub-shaft.

5. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, a first damping spring is arranged at the bottom of the first cutter.

6. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, a second damping spring is arranged at the bottom of the second cutter.

7. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, a number of wear-resistant guiding strips are arranged on the inner wall of the drum.

8. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, the bottom of the drum has a sieve plate, and the sieve plate is provided with sieve holes and a discharge door.

9. The drum-type multi-cutter shaft processing device for surface strengthening of recycled aggregates according to claim 1, characterized in that, the hollow shaft connecting frame includes a hollow shaft and three sleeves arranged at the lower end of the hollow shaft. The three sleeves are connected to the bottoms of the three sub-shafts, and the tops of the three sub-shafts are connected to a sub-shaft fixing plate arranged at the middle position of the hollow shaft.

Images