RAP aggregate crushing and screening mechanism

Abstract

The utility model discloses an RAP aggregate crushing and screening mechanism, and belongs to the field of aggregate processing.The screening mechanism comprises a vibrating feeder, a hammer crusher fixedly installed at a discharging port of the vibrating feeder and a conveying belt fixedly installed at a discharging port of the hammer crusher, and a vibrating screen is fixedly installed at the end, away from the hammer crusher, of the conveying belt; two sorting conveying belts are fixedly installed at the discharging end of the vibrating screen, and an auxiliary discharging mechanism is arranged at a discharging opening of the hammer crusher. According to the screening mechanism, the driving motor is started, aggregate is discharged through the discharging net opening in the discharging plate after being crushed, the driving motor drives the reciprocating lead screw to rotate, and the reciprocating lead screw drives the moving block to transversely reciprocate at the bottom of the hammer crusher; therefore, the brush rod on the moving block is driven to scrape aggregate blocked in the discharging net opening in the discharging plate in an auxiliary mode at the bottom of the hammer crusher, the aggregate can be smoothly discharged from the discharging net opening, the blocking probability of the hammer crusher is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of aggregate processing technology, and in particular to a RAP aggregate crushing and screening mechanism. Background Art

[0002] RAP aggregate (Recycled Asphalt Pavement) crushing and screening mechanism is a key equipment for processing waste asphalt pavement materials (RAP). It converts RAP materials into aggregate suitable for reuse through crushing and screening processes. The RAP aggregate crushing and screening mechanism mainly consists of two parts: the crushing system and the screening system.

[0003] Commonly used crushing mechanisms include hammer crushers, which mainly use high-speed rotating hammers to impact, shear and tear materials to achieve the purpose of crushing. At the same time, the gravity of the material causes it to rush from the high-speed rotating hammers to the baffles and screen bars in the frame. Materials larger than the screen hole size will be retained on the screen plate and continue to be hit and ground by the hammers until they are crushed to the required discharge particle size and finally discharged from the machine through the screen plate. When crushing RAP aggregates, because RAP aggregates contain asphalt and are flexible materials, the screen seams of the screen plate are easily blocked, which will reduce the production capacity of the crusher and even cause shutdown.

[0004] Therefore, the present application provides a RAP aggregate crushing and screening mechanism to solve the above problems. Utility Model Content

[0005] The present application provides a RAP aggregate crushing and screening mechanism, which aims to solve the problem of the existing hammer crusher being easily blocked when crushing flexible materials, etc., as mentioned in the background art.

[0006] To achieve the above objectives, the present application provides the following technical solutions: a RAP aggregate crushing and screening mechanism, comprising a vibrating feeder, a hammer crusher fixedly mounted at the discharge port of the vibrating feeder, and a conveyor belt fixedly mounted at the discharge port of the hammer crusher, a vibrating screen fixedly mounted on the end of the conveyor belt away from the hammer crusher, two sorting conveyor belts fixedly mounted at the discharge end of the vibrating screen, and an auxiliary discharge mechanism provided at the discharge port of the hammer crusher:

[0007] The auxiliary discharge mechanism includes a discharge plate fixedly mounted at the discharge port of the hammer crusher, the discharge plate being provided with a discharge mesh opening, two support plates fixedly mounted on one side of the discharge plate at the bottom of the hammer crusher, a reciprocating screw being rotatably mounted between the two support plates, one end of the reciprocating screw being fixedly mounted to a driving motor fixedly connected to the bottom of the hammer crusher, a moving block being screwed onto the reciprocating screw, and a brush rod being movably mounted on the moving block. In this way, when aggregate is crushed, the driving motor is started, and the aggregate is discharged through the discharge mesh opening on the discharge plate after being crushed. The driving motor drives the reciprocating screw to rotate, and the reciprocating screw drives the moving block to move back and forth laterally at the bottom of the hammer crusher, thereby driving the brush rod on the moving block to scrape the aggregate blocked in the discharge mesh opening on the discharge plate at the bottom of the hammer crusher, so that the aggregate can be discharged smoothly from the discharge mesh opening, thereby reducing the probability of blockage of the hammer crusher and improving production efficiency.

[0008] Preferably, in order to support the brush rod, a secondary support plate symmetrically arranged with the support plate is fixedly mounted on the other side of the bottom of the hammer crusher, a support bar is fixedly mounted on the secondary support plate, and a support block rotatably connected to the other end of the brush rod is slidably mounted on the support bar to ensure stable operation of the brush rod.

[0009] Preferably, in order to install the brush rod, the brush rod is composed of a shaft end portion, whose ends are respectively rotatably connected to the moving block and the supporting block, and a rod body portion fixedly mounted on the shaft end portion, and a brush strip is fixedly mounted on the rod body portion, so as to facilitate maintenance of the brush strip.

[0010] Preferably, in order to reduce the loss of the brush bar, a rack is fixedly installed on one side of the support bar at the bottom of the hammer crusher, and a gear meshing with the rack is fixedly installed on the outer wall of the shaft end to avoid rapid wear of the brush bar due to horizontal scraping.

[0011] Preferably, in order to accelerate the falling of the aggregate, a vibration motor is fixedly installed on the discharge plate, so that the crushed aggregate adhering to the discharge net mouth falls more easily.

[0012] Preferably, to accelerate aggregate crushing, the screening mechanism further includes a throwing mechanism disposed at the vibrating feeder outlet. The throwing mechanism includes an extension plate fixedly mounted at the vibrating feeder outlet and extending toward the hammer crusher inlet. A rubber pad is fixedly mounted on the extension plate. This allows the material entering the hammer crusher to be more dispersed, thereby accelerating the crushing speed.

[0013] The screening mechanism starts the driving motor, and the aggregate is discharged through the discharge mesh opening on the discharge plate after being crushed. The driving motor drives the reciprocating screw to rotate, and the reciprocating screw drives the moving block to move back and forth laterally at the bottom of the hammer crusher, thereby driving the brush rod on the moving block to assist in scraping the aggregate blocked in the discharge mesh opening on the discharge plate at the bottom of the hammer crusher, so that it can be discharged smoothly from the discharge mesh opening, thereby reducing the probability of blockage of the hammer crusher and improving production efficiency.

[0014] The screening mechanism feeds materials on the vibrating feeder. When the vibrating feeder discharges materials, the aggregates will be moved forward by vibration to the extension plate. Due to their own elastic force, the aggregates will be rebounded by the rubber pad when falling on the extension plate, making the aggregates bounce higher and fall into the feed port of the hammer crusher in the form of a parabola, making the materials entering the hammer crusher more dispersed and accelerating the crushing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the top structure of a hammer crusher for a RAP aggregate crushing and screening mechanism;

[0016] Figure 2 A schematic diagram of the bottom structure of a hammer crusher for a RAP aggregate crushing and screening mechanism;

[0017] Figure 3 for Figure 2 A in the middle is an enlarged schematic diagram;

[0018] Figure 4 This is a schematic diagram of the working process of a RAP aggregate crushing and screening mechanism.

[0019] In the picture:

[0020] 1. Vibrating feeder; 2. Hammer crusher; 3. Conveyor belt; 4. Vibrating screen; 5. Sorting conveyor belt; 6. Auxiliary discharge mechanism; 61. Discharge plate; 62. Discharge mesh; 63. Support plate; 64. Reciprocating screw; 65. Drive motor; 66. Moving block; 67. Brush rod; 68. Auxiliary support plate; 69. Support bar; 610. Support block; 611. Shaft end; 612. Rod body; 613. Brush bar; 614. Rack; 615. Gear; 616. Vibrating motor; 7. Throwing mechanism; 71. Extension plate; 72. Rubber pad. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] Example 1

[0023] This embodiment provides a RAP aggregate crushing and screening mechanism, such as Figure 1-4 As shown, the screening mechanism includes a vibrating feeder 1, a hammer crusher 2 fixedly installed at the discharge port of the vibrating feeder 1, and a conveyor belt 3 fixedly installed at the discharge port of the hammer crusher 2. A vibrating screen 4 is fixedly installed on the end of the conveyor belt 3 away from the hammer crusher 2. Two sorting conveyor belts 5 are fixedly installed at the discharge end of the vibrating screen 4. An auxiliary discharge mechanism 6 is provided at the discharge port of the hammer crusher 2:

[0024] The auxiliary discharge mechanism 6 includes a discharge plate 61 fixedly installed at the discharge port of the hammer crusher 2, and a discharge mesh port 62 is opened on the discharge plate 61. Two support plates 63 are fixedly installed on one side of the discharge plate 61 at the bottom of the hammer crusher 2. A reciprocating screw rod 64 is rotatably installed between the two support plates 63. One end of the reciprocating screw rod 64 is fixedly installed with a drive motor 65 fixedly connected to the bottom of the hammer crusher 2. A moving block 66 is screwed on the reciprocating screw rod 64, and a brush rod 67 is movably installed on the moving block 66.

[0025] During use, the drive motor 65 is started, and the aggregate is discharged through the discharge mesh port 62 on the discharge plate 61 after being crushed. The drive motor 65 drives the reciprocating screw 64 to rotate, and the reciprocating screw 64 drives the moving block 66 to move back and forth laterally at the bottom of the hammer crusher 2, thereby driving the brush rod 67 on the moving block 66 to assist in scraping the aggregate blocked in the discharge mesh port 62 on the discharge plate 61 at the bottom of the hammer crusher 2, so as to enable it to be discharged smoothly from the discharge mesh port 62, thereby reducing the probability of blockage of the hammer crusher 2 and improving production efficiency.

[0026] Specifically, a secondary support piece 68, symmetrically arranged with the support piece 63, is fixedly mounted on the other side of the bottom of the hammer crusher 2. A support bar 69 is fixedly mounted on the secondary support piece 68. A support block 610, which is rotatably mounted on the support bar 69 and is rotatably connected to the other end of the brush rod 67, is slidably mounted on the support bar 69. During use, as the brush rod 67 follows the moving block 66 and moves on the reciprocating screw 64, the support block 610 supports the other end of the brush rod 67 and moves back and forth on the support bar 69, ensuring stable operation of the brush rod 67.

[0027] More specifically, the brush rod 67 consists of a shaft end 611, each of which is pivotally connected to the moving block 66 and the support block 610, and a rod body 612 fixedly mounted on the shaft end 611. A brush strip 613 is fixedly mounted on the rod body 612. During use, the moving block 66 is first installed, and then the shaft end 611 is plugged into the moving block 66 to complete the pivotal connection. The support block 610 is then placed over the shaft end 611 at the other end to complete the pivotal connection, making it easier to maintain the brush strip 613.

[0028] Furthermore, a rack 614 is fixedly mounted on one side of the support bar 69 at the bottom of the hammer crusher 2, and a gear 615 is fixedly mounted on the outer wall of the shaft end 611, meshing with the rack 614. During use, as the shaft end 611 moves with the reciprocating screw 64, the gear 615 on the shaft end 611 rotates along with the rack 614, thereby driving the brush strip 613 on the rod body 612 to rotate and scrape the discharge plate 61, thereby preventing the brush strip 613 from rapid wear due to horizontal scraping.

[0029] Furthermore, a vibration motor 616 is fixedly mounted on the discharge plate 61. When in use, the vibration motor 616 is started to vibrate the discharge plate 61, so that the crushed aggregate adhering to the discharge mesh 62 falls more easily.

[0030] Example 2

[0031] Different from Example 1, when the vibrating feeder 1 feeds, the accumulated materials may accumulate at the feed port of the hammer crusher 2, affecting the crushing efficiency. For this reason, the screening mechanism also includes a throwing mechanism 7 arranged at the discharge port of the vibrating feeder 1. The throwing mechanism 7 includes an extension plate 71 fixedly installed at the discharge port of the vibrating feeder 1 and extending toward the feed port of the hammer crusher 2. A rubber pad 72 is fixedly installed on the extension plate 71.

[0032] During use, the aggregate is fed on the vibrating feeder 1. When the vibrating feeder 1 discharges the aggregate, the aggregate will be moved forward by vibration to the extension plate 71. Due to the elastic force of the aggregate itself, the aggregate will be rebounded by the rubber pad 72 when it falls on the extension plate 71, so that the aggregate bounces to a higher height and falls into the feed port of the hammer crusher 2 in the form of a parabola, so that the material entering the hammer crusher 2 is more dispersed and the crushing speed is accelerated.

[0033] The above is only a preferred specific implementation method of the present application, but the scope of protection of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and concept of the present application within the technical scope disclosed in the present application, and they should be covered by the scope of protection of the present application.

Claims

1. A RAP aggregate crushing and screening mechanism, comprising a vibrating feeder (1), a hammer crusher (2) fixedly mounted at the discharge port of the vibrating feeder (1), and a conveyor belt (3) fixedly mounted at the discharge port of the hammer crusher (2), wherein a vibrating screen (4) is fixedly mounted on one end of the conveyor belt (3) away from the hammer crusher (2), two sorting conveyor belts (5) are fixedly mounted at the discharge end of the vibrating screen (4), and an auxiliary discharge mechanism (6) is provided at the discharge port of the hammer crusher (2), characterized in that: The auxiliary discharge mechanism (6) comprises a discharge plate (61) fixedly mounted at the discharge port of the hammer crusher (2), a discharge mesh opening (62) being provided on the discharge plate (61), two supporting pieces (63) being fixedly mounted on one side of the discharge plate (61) at the bottom of the hammer crusher (2), a reciprocating screw rod (64) being rotatably mounted between the two supporting pieces (63), a driving motor (65) fixedly connected to the bottom of the hammer crusher (2) being fixedly mounted at one end of the reciprocating screw rod (64), a moving block (66) being screwed onto the reciprocating screw rod (64), and a brush rod (67) being movably mounted on the moving block (66).

2. A RAP aggregate crushing and screening mechanism according to claim 1, characterized in that: A secondary support piece (68) symmetrically arranged with the support piece (63) is fixedly mounted on the other side of the bottom of the hammer crusher (2); a support bar (69) is fixedly mounted on the secondary support piece (68); and a support block (610) rotatably connected to the other end of the brush rod (67) is slidably mounted on the support bar (69).

3. A RAP aggregate crushing and screening mechanism according to claim 1, characterized in that: The brush rod (67) is composed of an axial end portion (611) whose ends are respectively rotatably connected to the moving block (66) and the supporting block (610), and a rod body portion (612) fixedly mounted on the axial end portion (611), and a brush strip (613) is fixedly mounted on the rod body portion (612).

4. A RAP aggregate crushing and screening mechanism according to claim 3, characterized in that: A rack (614) is fixedly mounted on one side of the support bar (69) at the bottom of the hammer crusher (2), and a gear (615) meshing with the rack (614) is fixedly mounted on the outer side wall of the shaft end (611).

5. The RAP aggregate crushing and screening mechanism according to claim 1, characterized in that: A vibration motor (616) is fixedly mounted on the discharge plate (61).

6. A RAP aggregate crushing and screening mechanism according to claim 1, characterized in that: The screening mechanism further comprises a throwing mechanism (7) arranged at the discharge port of the vibrating feeder (1), the throwing mechanism (7) comprising an extension plate (71) fixedly mounted at the discharge port of the vibrating feeder (1) and extending toward the feed port of the hammer crusher (2), a rubber pad (72) fixedly mounted on the extension plate (71).

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