Gravel screening device for crushed construction waste
By setting up multiple screening zones and waste zones inside the drum screen, and using inertia and gravity to adjust the material sliding direction, the problems of material mixing and incomplete screening in existing drum screens are solved, achieving efficient screening of construction waste.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO RUIJIATAI NEW ENVIRONMENTAL PROTECTION BUILDING MATERIALS CO LTD
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-19
AI Technical Summary
Existing drum screens lack effective separation for materials of different screening particle sizes, resulting in material mixing in the transition zone of the screen openings and incomplete screening of large flow rates of materials, which affects accuracy.
Design a sand and gravel screening device for crushed construction waste. The device uses an inclined drum screen, which is divided into multiple screening zones and a waste zone. The screen apertures increase in size sequentially. A collection zone partition is set up, and the material conveying path is extended by inertia and gravity. The material sliding direction is adjusted by a return plate to enhance the screening effect.
It achieves precise separation of materials according to particle size, avoids mixing, improves screening quality and accuracy, and ensures that large flow of materials are fully screened.
Smart Images
Figure CN224253424U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of sand and gravel screening equipment, and in particular relates to a sand and gravel screening device for crushed construction waste. Background Technology
[0002] Shaftless drum screens are widely used in mining, metallurgy, building materials and other production industries, mainly for screening materials by particle size to achieve a more uniform particle size distribution and meet different production needs. Due to their simple process layout, drum screens are highly favored in material grading operations across various industries. However, existing drum screens have significant shortcomings: firstly, they lack effective separation of collection areas for materials of different screening particle sizes, leading to material mixing in the transition zone of the screen openings; secondly, the material is conveyed in a linear manner during the screening process within the drum. When the throughput is large, the material in the middle of the drum often does not have enough time to be fully screened before being conveyed to the next screening section, thus affecting the overall screening accuracy. Utility Model Content
[0003] Based on the above background, the purpose of this utility model is to provide a sand and gravel screening device for crushed construction waste.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A sand and gravel screening device for crushed construction waste includes a frame and a drum screen, wherein the drum screen is rotatably mounted on the frame and is inclined downward from left to right.
[0006] The drum screen is divided into a screening zone and a waste zone along its inclined direction, and the screen aperture of the multiple screening zones increases sequentially as it is inclined downwards;
[0007] The frame is equipped with a drive mechanism for driving the drum screen to rotate on the frame;
[0008] A collection area is provided below the frame, and multiple collection areas are respectively located below the corresponding screening area and waste area, with adjacent collection areas separated from each other;
[0009] The two sides of the frame are in contact with the open sides at both ends of the drum screen;
[0010] The drum screen is equipped with a connecting rod coaxially inside, and the two ends of the connecting rod are connected to the two sides of the frame.
[0011] The connecting rod is provided with return plates arranged in a linear array along its axis, and the inclination direction of the return plates is opposite to the inclination direction of the drum screen.
[0012] The rotary screen is provided with a feed hopper on the left side, and the feed hopper is located on the frame.
[0013] Through the above technical solution, after the building material enters the drum screen from the feed hopper, the drum screen rotates on the frame to perform screening. After passing through multiple screening zones, the material is screened sequentially according to the particle size from small to large and enters the corresponding collection zone. The final waste enters the waste area and falls into the collection zone below. During screening, the material rotates upward with the drum screen due to inertia and falls due to gravity. It slides to the left side through the inclined direction of the return plate, which increases the conveying path of the material in the screening zone, thereby enabling more comprehensive screening of the material and improving the screening quality.
[0014] Furthermore, the right end of the feed hopper is located at the upper inside of the drum screen.
[0015] With the above technical solution, the material entering the drum screen passes through the first return plate on the left end, and then the screening begins from the leftmost end of the drum screen.
[0016] Furthermore, the axial length of the screen section with smaller screen holes in the drum screen is longer than the axial length of the screen section with larger screen holes.
[0017] The above technical solutions can better and more effectively screen materials with small particle sizes.
[0018] Furthermore, the driving mechanism includes a first rotating ring and a first driving wheel. The first rotating ring is disposed at both ends of the outer side of the drum screen, and the first driving wheel is rotatably mounted on the frame. The two first driving wheels are connected by a rotating shaft. The first driving wheel abuts against the side of the first rotating ring.
[0019] The frame has two second drive wheels on its left side; a transmission belt connects the two second drive wheels.
[0020] One end of the rotating shaft is connected to one of the second drive wheels; the other second drive wheel is connected to the motor output end.
[0021] The motor is fixed to the left side of the frame.
[0022] The above technical solution involves a motor driving a second drive wheel to rotate, which in turn drives a first drive wheel to rotate. The first drive wheel then drives a first rotating ring to rotate, thereby rotating the drum screen to screen the material.
[0023] Furthermore, the first drive wheel has a pattern on its side.
[0024] The above technical solution increases the friction between the first drive wheel and the first rotating ring, thus preventing slippage.
[0025] Furthermore, the drive mechanism is provided in two sets, symmetrically arranged on both sides below the drum screen.
[0026] The above technical solutions improve the stability of rotary drum screen rotation screening.
[0027] Furthermore, a second rotating ring is coaxially provided on the outer side of the drum screen, and the second rotating ring is located between adjacent screen sections;
[0028] The frame is provided with a support frame, and the support frame is provided with an arc-shaped groove, and the second rotating ring is rotatably disposed in the arc-shaped groove;
[0029] The bottom of the support frame contacts the top of the collection areas on both sides.
[0030] The above technical solutions improve the stability of the drum screen rotation and prevent materials of different particle sizes from entering the wrong collection area, thereby improving the accuracy of material screening.
[0031] Furthermore, a rolling column is rotatably provided inside the arc-shaped groove, and the rolling column is in contact with the side of the first rotating ring.
[0032] The above technical solution reduces the resistance of the second rotating ring rotating in the arc groove.
[0033] This utility model has the following beneficial effects:
[0034] 1. After the building material falls into the drum screen through the feed hopper, the drum screen rotates continuously on the frame, starting the screening operation. The material passes through multiple screening zones in sequence inside the drum screen, and is accurately screened into the corresponding collection areas in order of increasing particle size. The remaining waste enters the waste area and falls into the collection device below. The partitions between the collection areas prevent the screening materials from mixing.
[0035] 2. During the screening process, the material is propelled to a high position by the rotation of the drum screen due to inertia, and then falls under the action of gravity. The material slides to the lower left along the inclined direction of the return plate, which significantly extends the conveying path within the screening area, allowing the material to be screened more thoroughly. This effectively avoids the problem of insufficient precision caused by incomplete screening and greatly improves the screening quality. Attached Figure Description
[0036] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0037] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0038] Figure 2This is a cross-sectional structural diagram of the present invention;
[0039] Figure 3 This is a three-dimensional structural diagram of the frame and drive mechanism of this utility model;
[0040] Figure 4 For the present utility model Figure 3 A magnified structural diagram at point A.
[0041] Among them: 1. Frame; 11. Feed hopper;
[0042] 2. Rotary drum screen; 21. Screening area; 22. Waste area;
[0043] 3. Collection area;
[0044] 4. First rotating ring; 41. First drive wheel; 42. Second drive wheel; 43. Rotating shaft; 44. Transmission belt; 45. Motor; 46. Second rotating ring; 47. Support frame; 48. Arc groove; 49. Rolling column;
[0045] 5. Connecting rod; 51. Return plate. Detailed Implementation
[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0047] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0048] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0049] like Figure 1-4As shown, a sand and gravel screening device for crushed construction waste includes a frame 1 and a drum screen 2. The drum screen 2 is rotatably mounted on the frame 1 and is inclined downwards from left to right. The drum screen 2 is divided into screening zones 21 and waste zones 22 along its inclined direction. The screen apertures of the multiple screening zones 21 increase sequentially as it slopes downwards. The shaft length of the screening zones 21 with smaller screen apertures is longer than that of the screening zones 21 with larger screen apertures, which can better screen the material. A drive mechanism is provided on the frame 1 to drive the drum screen 2 to rotate on the frame 1. Below the frame 1... The screen is provided with a collection area 3, and multiple collection areas 3 are respectively located below the corresponding screening area 21 and waste area 22, and adjacent collection areas 3 are separated from each other; the two sides of the frame 1 are in contact with the open sides of the two ends of the drum screen 2; a connecting rod 5 is coaxially provided inside the drum screen 2, and the two ends of the connecting rod 5 are connected to the two sides of the frame 1; a return plate 51 is provided on the connecting rod 5 in a linear array along its axis, and the inclination direction of the return plate 51 is opposite to the inclination direction of the drum screen 2; a feed hopper 11 is provided on the left side of the drum screen 2, the feed hopper 11 is located on the frame 1, and the right end of the feed hopper 11 is located at the upper inside of the drum screen 2. After the building materials enter the drum screen 2 from the feed hopper 11, the drum screen 2 rotates on the frame 1 to perform screening. After passing through multiple screening sections 21, the materials are screened in sequence according to the particle size from small to large and enter the corresponding collection area 3. The final waste enters the waste area 22 and falls into the collection area 3 below. During screening, the materials rotate upward with the drum screen 2 due to inertia and fall due to gravity. They slide to the left side through the inclined direction of the return plate 51, which increases the conveying path of the materials in the screening section 21, thereby enabling more comprehensive screening of the materials and improving the screening quality.
[0050] Specifically, the drive mechanism has two sets, symmetrically arranged on both sides below the drum screen 2. The drive mechanism includes a first rotating ring 4 and a first drive wheel 41. The first rotating ring 4 is located at both ends of the outer side of the drum screen 2, with the right first rotating ring 4 located between the rightmost screening section 21 and the waste section 22. The first drive wheel 41 is rotatably mounted on the frame 1. The side of the first drive wheel 41 is patterned, and the two first drive wheels 41 are connected by a rotating shaft 43. The first drive wheel 41 abuts against the side of the first rotating ring 4. Two second drive wheels 42 are located on the left side of the frame 1. A transmission belt 44 connects the two second drive wheels 42. One end of the rotating shaft 43 is connected to one of the second drive wheels 42. The other second drive wheel 42 is connected to the output end of the motor 45. The motor 45 is fixed to the frame 1. On the left side, a second rotating ring 46 is coaxially arranged on the outer side of the drum screen 2, and the second rotating ring 46 is located between adjacent screening sections 21; a support frame 47 is provided on the frame 1, and an arc-shaped groove 48 is provided on the support frame 47, in which the second rotating ring 46 is rotatably located; a rolling column 49 is rotatably arranged in the arc-shaped groove 48, and the rolling column 49 contacts the side of the first rotating ring 4. The bottom of the support frame 47 contacts the top of the collection areas 3 on both sides. The motor 45 drives the second drive wheel 42 to rotate, thereby driving the first drive wheel 41 to rotate, and the first drive wheel 41 drives the first rotating ring 4 to rotate, driving both ends of the drum screen 2, thereby driving the drum screen 2 to rotate and screen the material. The support frame 47 supports the middle position of the drum screen 2, which better improves the rotational stability of the drum screen 2.
[0051] The working principle of this utility model is as follows: Building materials enter the drum screen 2 from the feed hopper 11. The material entering the drum screen 2 passes through the first return plate 51 at the left end, and then begins to be screened from the leftmost end of the drum screen 2. The motor 45 drives the second drive wheel 42 to rotate, which in turn drives the first drive wheel 41 to rotate. The first drive wheel 41 drives the first rotating ring 4 to rotate, which in turn drives the drum screen 2 to rotate. The material is conveyed to the right as the drum screen 2 rotates. The material is screened sequentially according to the particle size from small to large and enters the corresponding collection area 3. The final waste enters the waste area 22 and falls into the collection area 3 below. During screening, when the material rotates to the top with the drum screen 2 due to inertia and falls due to gravity, it slides to the left side through the inclined direction of the return plate 51, which increases the conveying path of the material in the screening area 21, thereby enabling more comprehensive screening of the material and improving the screening quality.
[0052] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.
Claims
1. A sand and gravel screening device for crushed construction waste, comprising a frame (1) and a drum screen (2), characterized in that: The drum screen (2) is rotatably mounted on the frame (1), and the drum screen (2) is inclined downward from left to right; The drum screen (2) is divided into a screening section (21) and a waste section (22) along its inclined direction, and the screen aperture of the multiple screening sections (21) increases sequentially along its inclined direction; The frame (1) is provided with a drive mechanism for driving the drum screen (2) to rotate on the frame (1); The frame (1) is provided with a collection area (3) below it. Multiple collection areas (3) are respectively located below the corresponding screening area (21) and waste area (22), and adjacent collection areas (3) are separated from each other. The two sides of the frame (1) are in contact with the open sides at both ends of the drum screen (2); The drum screen (2) is coaxially provided with a connecting rod (5), and the two ends of the connecting rod (5) are connected to the two sides of the frame (1); The connecting rod (5) is provided with return plates (51) arranged in a linear array along its axial direction, and the inclination direction of the return plates (51) is opposite to the inclination direction of the drum screen (2). The drum screen (2) is provided with a feed hopper (11) on the left side, and the feed hopper (11) is located on the frame (1).
2. The sand and gravel screening device after crushing construction waste according to claim 1, characterized in that: The right end of the feed hopper (11) is located at the upper inside of the drum screen (2).
3. The sand and gravel screening device after crushing construction waste according to claim 1, characterized in that: The axial length of the screen section (21) with smaller screen holes in the drum screen (2) is longer than that of the screen section (21) with larger screen holes.
4. The sand and gravel screening device after crushing construction waste according to claim 1, characterized in that: The driving mechanism includes a first rotating ring (4) and a first driving wheel (41). The first rotating ring (4) is located at both ends of the outer side of the drum screen (2). The first driving wheel (41) is rotatably mounted on the frame (1), and the two first driving wheels (41) are connected by a rotating shaft (43). The first driving wheel (41) abuts against the side of the first rotating ring (4). Two second drive wheels (42) are provided on the left side of the frame (1); a transmission belt (44) is connected between the two second drive wheels (42); One end of the rotating shaft (43) is connected to one of the second drive wheels (42); the other second drive wheel (42) is connected to the output end of the motor (45); The motor (45) is fixed on the left side of the frame (1).
5. The sand and gravel screening device after crushing construction waste according to claim 4, characterized in that: The first drive wheel (41) has a pattern on its side.
6. The sand and gravel screening device after crushing construction waste according to claim 5, characterized in that: The drive mechanism is provided in two sets, symmetrically arranged on both sides below the drum screen (2).
7. The sand and gravel screening device after crushing construction waste according to any one of claims 1-6, characterized in that: The outer side of the drum screen (2) is provided with a second rotating ring (46), which is located between adjacent screening sections (21). The frame (1) is provided with a support frame (47), and the support frame (47) is provided with an arc groove (48), and the second rotating ring (46) is rotatably disposed in the arc groove (48); The bottom of the support frame (47) contacts the top of the collection areas (3) on both sides.
8. The sand and gravel screening device after crushing construction waste according to claim 7, characterized in that: A rolling column (49) is rotatably provided inside the arc-shaped groove (48), and the rolling column (49) is in contact with the side of the first rotating ring (4).