Recycled aggregate sizing screen structure with multiple layers of screens

Abstract

This utility model relates to a recycled aggregate grading screen structure with multi-layer screens, belonging to the field of aggregate screening technology. The recycled aggregate grading screen structure with multi-layer screens includes: a mounting frame, with a vibrating frame mounted on the top of the mounting frame; during aggregate screening, the first and second screens facilitate multi-stage screening of the aggregate to be screened. Furthermore, under the action of the feeding mechanism during the screening process, two sets of feeding plates are driven to reciprocate at the top of the first screen to disperse the aggregate accumulated during screening, ensuring sufficient contact between the aggregate to be screened and the first screen. The two sets of feeding plates move alternately during the feeding process, further dispersing the aggregate accumulated at the top of the first screen. This enhances the feeding mechanism's effect on dispersing the aggregate accumulated on the first screen during screening, ensuring thorough screening of the aggregate and improving the grading and screening effect.

Description

Technical Field

[0001] This utility model relates to the field of aggregate screening technology, and in particular to a recycled aggregate grading screen structure with multiple layers of screens. Background Technology

[0002] Recycled aggregate is a granular material made from construction waste such as concrete and bricks through processes such as crushing and screening. After being crushed, the aggregate typically varies in size, so screening devices are needed to grade and separate the crushed recycled aggregate to meet specific usage requirements.

[0003] Recycled coarse aggregate refers to materials processed from construction waste such as concrete, mortar, stone, and bricks. It can replace natural sand and gravel or manufactured sand. It can be used to make concrete stabilized layers for urban road base and subbase layers, as well as to produce low-grade recycled sand concrete, recycled mortar, and recycled bricks, blocks, and other building materials.

[0004] According to the Chinese patent "Screening Device for Recycled Aggregates" (authorization announcement number CN220590681U), recycled aggregates are placed in a screen with two screens. Under the movement of the screen hopper, coarse particles are filtered by screen one and flow out from outlet one, medium particles are filtered by screen two and flow out from outlet two, and fine particles finally flow out from outlet three, thus performing three-stage filtration and screening. This allows for the screening of recycled aggregates into three specifications: coarse, medium, and fine.

[0005] Although the above-mentioned application can classify and screen aggregates, the large friction between crushed aggregate particles makes them prone to aggregation during primary screening. Furthermore, the large particle size distribution of crushed aggregates can cause some fine aggregate particles to be encased by coarse aggregate particles during the initial screening, thus affecting the classification and screening effect of aggregates. Utility Model Content

[0006] Therefore, it is necessary to provide a recycled aggregate grading screen structure with multiple screens to address the problem that the high friction between aggregate particles makes them prone to aggregation during primary screening, which can lead to some fine aggregate particles being wrapped by coarse aggregate particles and failing to be fully screened, thus affecting the grading and screening effect of aggregates.

[0007] Includes: a mounting frame, a vibrating frame mounted on the top of the mounting frame, and a first screen and a second screen fixedly connected to the inner wall of the vibrating frame, wherein the mesh diameter of the first screen is larger than that of the second screen;

[0008] The feeding mechanism includes a drive assembly installed on one side of the vibrating frame. Two reciprocating screws are rotatably connected to one side of the vibrating frame. A moving rod is installed on the surface of the reciprocating screw. One end of the moving rod is slidably connected to a mounting rod. Multiple feeding plates are fixedly connected to the bottom ends of the two mounting rods. The longitudinally adjacent feeding plates are staggered.

[0009] In one embodiment, the drive assembly includes a first motor fixedly connected to one side of the vibration frame, and two first gears fixedly connected to the ends of the two reciprocating lead screws away from the vibration frame. The surfaces of the two first gears are engaged, and the end of one of the first gears away from the reciprocating lead screw is fixedly connected to the output shaft of the first motor. This facilitates the synchronous rotation of the two first gears.

[0010] In one embodiment, a lead screw is rotatably connected to one side of the inner wall of the moving rod. A slider is threaded onto the surface of the lead screw, one end of which is fixedly connected to one end of the mounting rod. The bottom end of the lead screw passes through the moving rod and is fixedly connected to a second gear, the surface of which is meshed with a rack. This facilitates the material feeding plate to move upwards a certain height repeatedly during its horizontal reciprocating movement, thereby preventing aggregate from getting stuck below the material feeding plate during the feeding process and ensuring the stability of the material feeding plate during feeding.

[0011] In one embodiment, a movable block is fixedly connected to the top of the rack, the surface of the movable block is slidably connected to the inner wall of the movable rod, and a first spring is fixedly connected to one side of the movable block. The end of the first spring away from the movable block is fixedly connected to the inner wall of the movable rod. This facilitates limiting the rack's position, and under the action of the first spring, it helps the rack automatically reset after the pressure is released, ensuring the effectiveness of the device.

[0012] In one embodiment, two limiting rods are fixedly connected to one side of the vibration frame, and the inner walls of the two movable rods are slidably connected to the surfaces of the two limiting rods, respectively. This facilitates limiting the movement of the movable rods.

[0013] In one embodiment, a baffle is fixedly connected to one side of the top end of the mounting rod, and one side of the baffle is in contact with the surface of the moving rod. This facilitates protection of the lead screw and ensures the stability of the connection between the lead screw and the slider.

[0014] In one embodiment, both sides of the feed plate are inclined, which reduces the resistance when the feed plate moves downward to reset.

[0015] In one embodiment, guide frames are fixedly connected to the lower part of one end of the first screen, one end of the second screen, and one end of the vibrating frame. This facilitates the grading and guiding of the graded aggregate.

[0016] Beneficial effects

[0017] 1. In this scheme, when screening aggregates, the first and second screens facilitate multi-stage screening of the aggregates to be screened. During the screening process, the feeding mechanism drives two sets of feeding plates to reciprocate at the top of the first screen to disperse the aggregates that accumulate during screening. This ensures that the aggregates to be screened are in full contact with the first screen. Furthermore, the two sets of feeding plates move back and forth alternately during the feeding process, which helps to fully disperse the aggregates that accumulate at the top of the first screen. This enhances the feeding mechanism's effect on dispersing the aggregates that are difficult to gather on the first screen during the screening process, ensuring that the aggregates are fully screened and improving the grading and screening effect of the aggregates.

[0018] 2. The rack, spring, gear, lead screw and slider help the material feeding plate move up a certain height repeatedly during the horizontal reciprocating movement, thereby avoiding the material from getting stuck under the material feeding plate during the feeding process and ensuring the stability of the material feeding plate during feeding. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the vibration frame of this utility model;

[0022] Figure 3 This is a schematic diagram of the material feeding mechanism of this utility model;

[0023] Figure 4 This is a schematic diagram of the material feeding plate distribution structure of this utility model;

[0024] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.

[0025] Figure label:

[0026] 100. Mounting frame; 200. Vibrating frame; 300. First screen; 400. Second screen; 500. Feeding mechanism; 510. Drive assembly; 511. First motor; 512. First gear; 520. Reciprocating screw; 530. Moving rod; 531. Screw; 532. Slider; 533. Second gear; 534. Moving block; 535. First spring; 536. Rack; 540. Mounting rod; 541. Baffle; 550. Feeding plate; 560. Limiting rod. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0028] The following is combined Figures 1-5 This invention describes a recycled aggregate grading screen structure with multiple screens.

[0029] In one embodiment, a recycled aggregate grading screen structure with multiple screens includes: a mounting frame 100, a vibrating frame 200 mounted on the top of the mounting frame 100, and a first screen 300 and a second screen 400 fixedly connected to the inner wall of the vibrating frame 200, wherein the mesh diameter of the first screen 300 is larger than the mesh diameter of the second screen 400.

[0030] The feeding mechanism 500 includes a drive assembly 510 installed on one side of the vibrating frame 200. Two reciprocating screws 520 are rotatably connected to one side of the vibrating frame 200. A moving rod 530 is installed on the surface of the reciprocating screw 520. A mounting rod 540 is slidably connected to one end of the moving rod 530. Multiple feeding plates 550 are fixedly connected to the bottom ends of the two mounting rods 540. The longitudinally adjacent feeding plates 550 are staggered.

[0031] In this embodiment, the vibrating frame 200, the first screen 300, and the second screen 400 are all inclined. The first screen 300 is positioned above the second screen 400. In the initial state, one of the moving rods 530 is away from the vibrating frame 200, and the other moving rod 530 is close to the vibrating frame 200. When the two reciprocating screws 520 are driven to rotate, one of the reciprocating screws 520 will first drive one of the moving rods 530 to move closer to the vibrating frame 200, and the other reciprocating screw 520 will first drive the other moving rod 530 to move away from the vibrating frame 200. During the continuous rotation of the two reciprocating screws 520, the two moving rods 530 will be driven to move synchronously and in opposite directions. A set of material-pulling plates 550 are installed at the bottom of the mounting rod 540. There is a certain distance between the bottom of the material-pulling plate 550 and the top of the first screen 300.

[0032] It should be noted that a vibration motor is installed at the bottom of the vibration frame 200, and two fixed seats are fixedly connected to both sides of the vibration frame 200. A spring is fixedly connected between the bottom of the four fixed seats and the top of the mounting frame 100, and a round rod is fixedly connected between the bottom of the fixed seats and the top of the mounting frame 100. The round rod is located inside the spring and limits the deformation of the spring. The vibration motor is started by the controller, and the vibration frame 200 can be driven to vibrate under the action of the vibration motor and the spring. The vibration of the vibration frame 200 can drive the first screen 300 and the second screen 400 to vibrate and screen the aggregate. The vibration motor driving the vibration frame 200 to vibrate is a known technology.

[0033] like Figure 2 , Figure 3 and Figure 4 As shown, the drive assembly 510 includes a first motor 511 fixedly connected to one side of the vibration frame 200, and two reciprocating screws 520 with a first gear 512 fixedly connected to one end away from the vibration frame 200. The surfaces of the two first gears 512 are meshed, and one end of the first gear 512 away from the reciprocating screw 520 is fixedly connected to the output shaft of the first motor 511.

[0034] In this embodiment, when the first motor 511 is started by the controller, the output shaft of the first motor 511 will drive one of the first gears 512 to rotate, and under the action of the two first gears 512 meshing, the two first gears 512 will drive the two reciprocating screws 520 to rotate synchronously.

[0035] like Figure 5As shown, a lead screw 531 is rotatably connected to one side of the inner wall of the movable rod 530. A slider 532 is threaded onto the surface of the lead screw 531. One end of the slider 532 is fixedly connected to one end of the mounting rod 540. The bottom end of the lead screw 531 passes through the movable rod 530 and is fixedly connected to a second gear 533. A rack 536 is meshed onto the surface of the second gear 533. A movable block 534 is fixedly connected to the top end of the rack 536. The surface of the movable block 534 is slidably connected to the inner wall of the movable rod 530. A first spring 535 is fixedly connected to one side of the movable block 534. The end of the first spring 535 away from the movable block 534 is fixedly connected to the inner wall of the movable rod 530.

[0036] In this embodiment, one end of the moving rod 530 is provided with a groove that matches the slider 532. In the initial state, the bottom end of the slider 532 is in contact with the inner bottom wall of the groove, and the bottom end of the moving rod 530 is provided with a moving groove that matches the moving block 534. The first spring 535 is disposed in the moving groove. When the moving rod 530 moves away from the vibration frame 200, the first spring 535 is in the released state. When the moving rod 530 moves toward the vibration frame 200, one end of the rack 536 will contact one side of the vibration frame 200, and the rack 536 will be squeezed as the moving rod 530 continues to move.

[0037] like Figure 4 As shown, two limiting rods 560 are fixedly connected to one side of the vibration frame 200, and the inner walls of the two moving rods 530 are slidably connected to the surfaces of the two limiting rods 560 respectively. The limiting rods 560 limit the movement path of the two moving rods 530.

[0038] like Figure 5 As shown, a baffle 541 is fixedly connected to one side of the top end of the mounting rod 540, and one side of the baffle 541 is in contact with the surface of the moving rod 530.

[0039] In this embodiment, a baffle 541 is disposed on the side of the sliding groove of the moving rod 530, and the baffle 541 is protected by the lead screw 531.

[0040] like Figure 4 As shown, both sides of the feed plate 550 are inclined.

[0041] In this embodiment, the top width of the feed plate 550 is greater than the bottom width of the feed plate 550.

[0042] like Figure 2 As shown, guide frames are fixedly connected to one end of the first screen 300, one end of the second screen 400, and the bottom of one end of the vibrating frame 200.

[0043] In this embodiment, the discharge ports of two longitudinally adjacent guide frames face opposite directions, and the screened aggregate is discharged through the guide frames.

[0044] Working principle: When screening aggregates, the driving vibrating frame 200 drives the first screen 300 and the second screen 400 to vibrate, and the aggregates to be screened are poured onto the first screen 300. At this time, under the action of the vibration of the first screen 300 and the second screen 400, the aggregates are screened. During the screening process, the aggregates with a diameter smaller than the mesh size of the first screen 300 fall onto the second screen 400, and the aggregates with a diameter smaller than the mesh size of the second screen 400 fall onto the inner bottom wall of the vibrating frame 200. Thus, the aggregates with a diameter larger than the mesh size of the first screen 300 are discharged from the guide frame at one end of the first screen 300, the aggregates with a diameter between the first screen 300 and the second screen 400 are discharged from the guide frame at one end of the second screen 400, and the aggregates with a diameter smaller than the mesh size of the second screen 400 are discharged from the guide frame at one end of the vibrating frame 200, thereby realizing the grading and screening of aggregates.

[0045] When screening aggregates, the drive assembly 510 is activated, driving two moving rods 530 to move back and forth alternately. During this movement, two mounting rods 540 drive two sets of material feeding plates 550 to move back and forth alternately at the top of the first screen 300. As the moving rods 530 move towards the vibrating frame 200, the rack 536 contacts one side of the vibrating frame 200. As the moving rods 530 continue to move, they compress the rack 536, causing it to move away from the vibrating frame 200. The first spring 535 is compressed, driving the second gear 533 to rotate the lead screw 531, causing the slider 5... 32 The mounting rod 540 drives the corresponding material-pushing plate 550 to move up a certain height. When the moving rod 530 moves away from the vibrating frame 200, the rack 536 loses its compression. The first spring 535 drives the rack 536 to reset, thereby driving the material-pushing plate 550 to reset through the second gear 533, the lead screw 531, the slider 532 and the mounting rod 540. When the aggregate moves from the first screen 300 and passes through the material-pushing plate 550, the aggregate that has accumulated during the screening process will be dispersed during the reciprocating movement of the material-pushing plate 550, so that the aggregate to be screened can fully contact the first screen 300.

[0046] Note: The reciprocating screw 520 is represented by two threaded grooves with the same pitch and opposite directions, connected at both ends by a transition curve. The rotation of the reciprocating screw 520 causes the side of the spiral groove to push the limit block placed in the spiral groove to make axial reciprocating motion. Therefore, when the reciprocating screw 520 is driven to rotate, it will drive the moving rod 530 to reciprocate.

[0047] Two connecting plates are fixedly connected to one side of the vibration frame 200. The inner walls of the two connecting plates are rotatably connected to the surfaces of the two reciprocating screws 520 respectively. Rubber corrugated sleeves are fixedly connected to both sides of the moving rod 530. The other ends of the two rubber corrugated sleeves are fixedly connected to one side of the connecting plate and one side of the vibration frame 200 respectively. The reciprocating screws 520 are set inside the rubber corrugated sleeves, and the rubber corrugated sleeves protect the reciprocating screws 520.

[0048] It should be noted that the first motor and the vibration motor mentioned above are all devices with relatively mature existing technologies. The specific models can be selected according to actual needs. At the same time, the first motor and the vibration motor can be powered by the built-in power supply or by the mains power. The specific power supply method should be selected according to the situation, which will not be elaborated here.

[0049] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A recycled aggregate grading screen structure with multiple screens, characterized in that, include: Mounting frame (100), the top of which is mounted with a vibrating frame (200), the inner wall of which is fixedly connected with a first screen (300) and a second screen (400), the mesh diameter of the first screen (300) being larger than that of the second screen (400); The material feeding mechanism (500) includes a drive assembly (510) installed on one side of the vibration frame (200). Two reciprocating screws (520) are rotatably connected to one side of the vibration frame (200). A moving rod (530) is installed on the surface of the reciprocating screw (520). One end of the moving rod (530) is slidably connected to an installation rod (540). Multiple material feeding plates (550) are fixedly connected to the bottom ends of the two installation rods (540). The longitudinally adjacent material feeding plates (550) are staggered.

2. The recycled aggregate grading screen structure with multi-layer screens according to claim 1, characterized in that, The drive assembly (510) includes a first motor (511) fixedly connected to one side of the vibration frame (200), and a first gear (512) fixedly connected to one end of each of the two reciprocating screws (520) away from the vibration frame (200). The surfaces of the two first gears (512) are meshed, and one end of the first gear (512) away from the reciprocating screw (520) is fixedly connected to the output shaft of the first motor (511).

3. The recycled aggregate grading screen structure with multi-layer screens according to claim 1, characterized in that, A lead screw (531) is rotatably connected to one side of the inner wall of the movable rod (530). A slider (532) is threadedly connected to the surface of the lead screw (531). One end of the slider (532) is fixedly connected to one end of the mounting rod (540). The bottom end of the lead screw (531) passes through the movable rod (530) and is fixedly connected to a second gear (533). A rack (536) is meshed with the surface of the second gear (533).

4. The recycled aggregate grading screen structure with multi-layer screens according to claim 3, characterized in that, A movable block (534) is fixedly connected to the top of the rack (536). The surface of the movable block (534) is slidably connected to the inner wall of the movable rod (530). A first spring (535) is fixedly connected to one side of the movable block (534). The end of the first spring (535) away from the movable block (534) is fixedly connected to the inner wall of the movable rod (530).

5. The recycled aggregate grading screen structure with multi-layer screens according to claim 1, characterized in that, Two limiting rods (560) are fixedly connected to one side of the vibration frame (200), and the inner walls of the two moving rods (530) are slidably connected to the surfaces of the two limiting rods (560).

6. The recycled aggregate grading screen structure with multi-layer screens according to claim 1, characterized in that, A baffle (541) is fixedly connected to one side of the top end of the mounting rod (540), and one side of the baffle (541) is in contact with the surface of the moving rod (530).

7. The recycled aggregate grading screen structure with multi-layer screens according to claim 1, characterized in that, Both sides of the feeding plate (550) are inclined.

8. The recycled aggregate grading screen structure with multi-layer screens according to claim 1, characterized in that, Guide frames are fixedly connected to one end of the first screen (300), one end of the second screen (400), and one end of the vibrating frame (200).

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