A sand and gravel screening device

Abstract

This utility model belongs to the field of sand and gravel screening technology, and in particular to a sand and gravel screening device, including a support frame, a drive motor and an air pump. The top of the support frame is provided with an outer cover, and a drum screen is rotatably connected to the inner side of the outer cover. The inner side of the drum screen is provided with a receiving component, which includes a support plate, a fixing plate, a guide plate and an air blowing structure. The inclined angle of the guide plate can guide the material, so that the material is scattered to the side of the drum screen where there is no material accumulation. This ensures that the material with a volume smaller than the screen hole can pass through the screen hole smoothly, thus improving the screening efficiency. The axial guidance of the guide plate can move the material to a larger empty space, which can further improve the screening efficiency and reduce the pressure at the feed end. The stepped structure of the guide plate and the air blowing structure can further disperse the material passing through the guide plate. At the same time, the air blowing structure can prevent the material from staying on the guide plate.

Description

Technical Field

[0001] This utility model belongs to the field of sand and gravel screening technology, and specifically relates to a sand and gravel screening device. Background Technology

[0002] Sand and gravel screening is a core process in the production and processing of sand and gravel aggregates. It refers to the process of using screening equipment to separate sand and gravel mixtures of different particle sizes into different particle size products according to set specifications.

[0003] A drum screen is a simple and easy-to-maintain sand and gravel screening equipment commonly used for screening materials that are prone to clogging. During the screening process, the material is lifted and spilled, and the screening purpose is achieved through the spilling of the material and the screen mesh.

[0004] During the screening process, due to the direction of the drum rotation, the friction between the material and the screen, and the rolling of the material, the material layer at the bottom of one side of the screen is thicker. When the material rises, it will fall directly onto the material below. At this time, the material at the bottom will affect the passage of small particles through the screen, reducing the screening efficiency. Utility Model Content

[0005] This invention provides a sand and gravel screening device that solves the problem that spilled materials are blocked by the bottom layer of accumulated materials and cannot pass through the screen holes.

[0006] This utility model provides the following technical solution: it includes a support frame, a drive motor and an air pump. The top of the support frame is provided with an outer cover. A drum screen is rotatably connected to the inner side of the outer cover. A receiving component is provided on the inner side of the drum screen. The receiving component includes a support plate, a fixing plate, a guide plate and an air blowing structure. The guide plate is composed of several inclined plates, and the several inclined plates are stepped.

[0007] Preferably, the fixing plate is fixedly connected to the top of the support plate, and several guide plates are connected to the fixing plate by elastic pads.

[0008] Preferably, the air blowing structure includes the air pump, a plurality of fixed pipes and an exhaust pipe, wherein the plurality of fixed pipes are respectively located inside a plurality of inclined plates, the bottommost inclined plate is not provided with a fixed pipe, and the plurality of exhaust pipes are arranged equidistantly on the fixed pipes.

[0009] Preferably, the top of the support frame is provided with several friction wheels, the outer ends of the two ends of the drum screen are in contact with several friction wheels respectively, and the drive motor is connected to one of the friction wheels.

[0010] Preferably, the top of the support frame is provided with two support rods, and the two ends of the tray are respectively fixedly connected to the two support rods.

[0011] Preferably, the air pump is fixedly connected to the support plate, and several fixed pipes are connected to the air pump through pipelines.

[0012] Preferably, both the drum screen and the outer cover are inclined, and the inner side of the drum screen is provided with several lifting plates.

[0013] The beneficial effects of this utility model are: 1. The inclined angle of the guide plate can guide the material, so that the material is scattered to the side of the drum screen where there is no material accumulation. This ensures that the material with a volume smaller than the screen hole can pass through the screen hole smoothly, thus improving the screening efficiency.

[0014] 2. The axial guidance of the guide plate can move the material to a larger empty space, which can further improve screening efficiency and reduce the pressure at the feed end.

[0015] 3. The stepped structure and air blowing structure of the guide plate can further disperse the material passing through the guide plate, and the air blowing structure can prevent the material from staying on the guide plate.

[0016] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the main structure of this utility model; Figure 3 This is a side view of the structure of this utility model; Figure 4 This is a schematic diagram of the receiving component in this utility model; Figure 5 This is a cross-sectional structural diagram of the inclined plate in this utility model; Figure 6 This is a front view of the material flow direction of this utility model; Figure 7 This is a top view of the material distribution in this utility model; Figure 8 This is a top view of the material flow direction of this utility model; In the diagram: 1. Support frame; 11. Friction wheel; 12. Drive motor; 13. Support rod; 2. Outer cover; 3. Drum screen; 4. Receiving assembly; 41. Support plate; 42. Fixing plate; 421. Elastic pad; 43. Guide plate; 431. Inclined plate; 44. Air blowing structure; 441. Air pump; 442. Fixing pipe; 443. Exhaust pipe. Detailed Implementation

[0018] Please see Figures 1-8 The present invention provides the following technical solution: including a support frame 1, a drive motor 12 and an air pump 441. The top of the support frame 1 is provided with an outer cover 2. The inner side of the outer cover 2 is rotatably connected to a drum screen 3. The inner side of the drum screen 3 is provided with a receiving component 4. The receiving component 4 includes a support plate 41, a fixing plate 42, a guide plate 43 and an air blowing structure 44. The guide plate 43 is composed of several inclined plates 431, and the several inclined plates 431 are in a stepped shape.

[0019] This embodiment includes a support frame 1, a drive motor 12, and an air pump 441. Both the drive motor 12 and the air pump 441 are existing technologies, and since this technical structure is not an improvement of this utility model, it will not be described in detail in the specification. The support frame 1 has an outer cover 2 at its top and a discharge port at its bottom. The outer cover 2 is fixedly connected to the support frame 1 via a support plate. A drum screen 3 is rotatably connected to the inner side of the outer cover 2. The drum screen 3 and the outer cover 2 are coaxial, and there is a gap between the drum screen 3 and the inner wall of the outer cover 2. When material is inside the drum screen 3, the rolling of the drum screen 3 causes the material to tumble inside, thus dispersing the material. When the volume of material smaller than the aperture of the drum screen 3 contacts the inner wall of the drum screen 3... When touched, material can enter the gap between the drum screen 3 and the outer cover 2 through the aperture. This material will be discharged from the bottom of the outer cover 2. Material larger than the aperture of the drum screen 3 will move along the tilt angle of the drum screen 3 to the discharge end of the drum screen 3 and be discharged through the discharge end of the drum screen 3. Due to the rotation direction of the drum screen 3 and the friction between the material and the drum screen 3, the material layer on the lower left is thicker when the drum screen 3 rotates clockwise, while the right side is empty. The inner side of the drum screen 3 is equipped with a receiving component 4, which is located in the lower half of the inside of the drum screen 3. When the material is lifted, it will fall downwards in the upper half of the drum screen 3. The receiving component 4 catches the falling material, achieving the effect of material handling. To buffer the impact of the material, the receiving component 4 includes a support plate 41, a fixing plate 42, a guide plate 43, and an air blowing structure 44. The length of the support plate 41 is greater than that of the drum screen 3, and the top of the support plate 41 is inclined. The inclined surface of the support plate 41 is opposite to the direction of material accumulation. When the drum screen 3 rolls clockwise, the material inside the drum screen 3 will accumulate at the bottom and left side of the drum screen 3, while the inclined surface of the support plate 41 faces the right side of the drum screen 3. The guide plate 43 has the same inclination angle as the support plate 41. When the material falls to the top of the guide plate 43, it is guided by the guide plate 43 to spill onto the right side of the drum screen 3. Since there is no material obstructing the right side of the drum screen 3, the spilled material with a volume smaller than the screen holes will be more likely to fall. The guide plate 43, composed of several inclined plates 431, allows material to pass smoothly through the sieve holes. The thickness of these plates gradually increases from right to left, and they are arranged in a stepped pattern. When material moves on the surface of the guide plate 43, the height difference between the inclined plates 431 causes the material to experience multiple drops during its movement, thus achieving material dispersion. Because the guide plate 43 is inclined both radially and axially, the material moves along it, tilting both axially and radially. Specifically, in the main view, the material moves downwards along the guide plate 43 to the lower right of the drum screen 3; in the top view, the material moves along the guide plate 43 towards the discharge end of the drum screen 3.The material layer at the bottom of the drum screen 3 gradually narrows from the feed end to the discharge end. Therefore, the open space on the right side of the drum screen 3 gradually increases from the feed end to the discharge end. Axial guidance by the guide plate 43 allows the material to move to a larger open space, further improving screening efficiency while reducing pressure at the feed end.

[0020] The fixed plate 42 is fixedly connected to the top of the pallet 41, and several guide plates 43 are connected to the fixed plate 42 through elastic pads 421. The fixed plate 42 and the top of the pallet 41 have the same tilt angle. The elastic pads 421 can buffer the guide plates 43 and reduce the impact of materials on the guide plates 43.

[0021] The air blowing structure 44 includes an air pump 441, several fixed pipes 442, and exhaust pipes 443. The fixed pipes 442 are located inside several inclined plates 431, except for the bottom inclined plate 431, which does not have any fixed pipes 442. The exhaust pipes 443 are arranged equidistantly on the fixed pipes 442. The fixed pipes 442 are parallel to each other, and one end of each fixed pipe is closed. The fixed pipes 442 are parallel to the inclined plates 431. The exhaust pipes 443 are connected to the fixed pipes 442. When gas enters the fixed pipes 442, it will be discharged outward through the exhaust pipes 443. Therefore, the exhaust pipes 443 will discharge the gas to the top of the right inclined plate 431, thereby achieving the purpose of blowing air onto the top of the right inclined plate 431. When the material is on the inclined plate 431, the air blowing through the exhaust pipes 443 can prevent the material from remaining on the inclined plate 431 and further disperse the material.

[0022] The top of the support frame 1 is provided with several friction wheels 11. The outer sides of both ends of the drum screen 3 are in contact with several friction wheels 11 respectively. The drive motor 12 is connected to one of the friction wheels 11. Friction strips are provided on the outer sides of both ends of the drum screen 3. Through the contact between the friction wheels 11 and the friction strips, the rotation of the friction wheels 11 can drive the drum screen 3 to roll.

[0023] The top of the support frame 1 is provided with two support rods 13, and the two ends of the tray 41 are fixedly connected to the two support rods 13 respectively; the support rods 13 are fixedly connected to the top of the support frame 1, and the tray 41 is located inside the drum screen 3 and does not contact the drum screen 3 due to the support of the support rods 13.

[0024] An air pump 441 is fixedly connected to a support plate 41, and several fixed tubes 442 are connected to the air pump 441 through pipes. The air pump 441 can blow air into the fixed tubes 442, and the gas inside the fixed tubes 442 is discharged through the exhaust pipe 443.

[0025] Both the drum screen 3 and the outer cover 2 are inclined. Several lifting plates are provided on the inner side of the drum screen 3. The higher end of the drum screen 3 is the feed inlet, and the lower end is the discharge outlet. By adjusting the inclination angle of the drum screen 3, materials with a volume larger than the aperture of the drum screen 3 move towards the discharge outlet of the drum screen 3, thereby achieving the purpose of automatic discharge. The lifting plates lift the material upward, so that the material undergoes the process of being lifted and falling.

[0026] The working principle and usage process of this utility model are as follows: In use, the material is first poured into the drum screen 3 from the higher end. The drum screen 3 rolls, causing the material to tumble. Simultaneously, the lifting plate lifts the material upwards, allowing it to undergo a process of being lifted and spilling. The guide plate 43 catches the spilled material and guides it to the right side of the drum screen 3. Since there is no material obstructing the right side of the drum screen 3, materials smaller than the screen holes can pass through smoothly, improving screening efficiency. Furthermore, as the material moves on the surface of the guide plate 43, the height difference between several inclined plates 431 causes the material to fall multiple times during its movement, thus dispersing the material. The air blowing structure 44 prevents the material from remaining on the inclined plates 431 and further disperses the material.

Claims

1. A sand and gravel screening device, comprising a drive motor (12) and an air pump (441), characterized in that: A support frame (1) is provided with an outer cover (2) on its top. A drum screen (3) is rotatably connected to the inner side of the outer cover (2). The receiving component (4) includes a support plate (41), a fixing plate (42), a guide plate (43) and an air blowing structure (44). The receiving component (4) is located inside the drum screen (3). The guide plate (43) is composed of several inclined plates (431), and the several inclined plates (431) are stepped.

2. The sand and gravel screening device according to claim 1, characterized in that: The fixing plate (42) is fixedly connected to the top of the support plate (41), and several guide plates (43) are connected to the fixing plate (42) through elastic pads (421).

3. The sand and gravel screening device according to claim 1, characterized in that: The air blowing structure (44) includes the air pump (441), a number of fixed pipes (442) and an exhaust pipe (443). The number of fixed pipes (442) are located inside a number of inclined plates (431). The bottom inclined plate (431) does not have a fixed pipe (442) inside. The number of exhaust pipes (443) are arranged equidistantly on the fixed pipes (442).

4. The sand and gravel screening device according to claim 1, characterized in that: The top of the support frame (1) is provided with several friction wheels (11), and the outer sides of both ends of the drum screen (3) are in contact with several friction wheels (11) respectively. The drive motor (12) is connected to one of the friction wheels (11).

5. The sand and gravel screening device according to claim 1, characterized in that: The top of the support frame (1) is provided with two support rods (13), and the two ends of the tray (41) are fixedly connected to the two support rods (13) respectively.

6. A sand and gravel screening device according to claim 3, characterized in that: The air pump (441) is fixedly connected to the support plate (41), and several fixed pipes (442) are connected to the air pump (441) through pipes.

7. The sand and gravel screening device according to claim 1, characterized in that: Both the drum screen (3) and the outer cover (2) are inclined, and the inner side of the drum screen (3) is provided with several lifting plates.

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