Construction site sand screening device for building construction

Abstract

The utility model discloses a construction site sand screening device for building construction, which belongs to the technical field of sand screening and comprises a bottom support, a driving component is fixedly mounted at the upper end of the bottom support, a sand screening net cylinder is rotatably mounted on the driving component, and two limiting supports are symmetrically and fixedly mounted at the upper end of the bottom support. The limiting support is composed of a fixed base plate, a first base plate, connecting rods, limiting springs, an anti-disengaging plate, second base plates and a U-shaped frame, the two second base plates are symmetrically and fixedly installed at the inner end of the U-shaped frame, the two connecting rods are movably installed on the two second base plates respectively, the two limiting springs are arranged on the two connecting rods in a sleeving mode respectively, and the anti-disengaging plate is arranged on the U-shaped frame. According to the sand screening device, the limiting support and the cleaning roller are arranged, the cleaning roller can clean sand and sundries blocked in the meshes of the sand screening net barrel, so that the meshes of the sand screening net barrel are kept smooth, the efficiency of sand which is small in particle size and meets the requirement passing through the meshes in the sand screening net barrel can be guaranteed, and finally the sand screening efficiency can be improved.

Description

Technical Field

[0001] This utility model relates to the field of sand screening technology, and in particular to a sand screening device for construction sites. Background Technology

[0002] Sand screening at construction sites is a crucial step in the construction process, primarily aimed at grading and screening materials such as sand and gravel to meet diverse construction needs. Sand screening is typically conducted in designated areas, utilizing various screening equipment to improve efficiency and screening quality. The drum sand screen is a widely used screening device in construction, mining, and stone processing. It primarily uses the rotation of the drum, combined with the grading effect of the screen mesh, to screen materials such as sand and gravel. The working principle of the drum sand screen is relatively simple and intuitive. A motor drives the drum shaft to rotate, and material enters the drum through the feed inlet. During the drum's rotation, the material is subjected to centrifugal force, friction, and gravity, causing it to tumble, jump, and move forward within the drum. Smaller, suitable sand particles pass through the screen mesh, while larger, unsuitable stones and debris continue to roll down the drum and eventually exit from the discharge outlet.

[0003] The existing patent application with application number CN202123032068.2 proposes a sand screening device for construction sites. During the sand screening process, sand and debris with a diameter similar to the through holes on the roller often get stuck in the through holes. When the through holes on the roller are blocked, the efficiency of small-sized sand that meets the requirements to pass through the through holes on the roller will decrease, thus reducing the sand screening efficiency. Therefore, it needs to be improved. Summary of the Invention

[0004] The main purpose of this utility model is to provide a sand screening device for construction sites, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A sand screening device for construction sites includes a bottom support. A drive assembly is fixedly installed at the upper end of the bottom support, and a sand screening cylinder is rotatably installed on the drive assembly. Two limiting supports are symmetrically fixedly installed at the upper end of the bottom support. Each limiting support consists of a fixed base plate, a first base plate, connecting rods, limiting springs, anti-detachment plates, a second base plate, and a U-shaped frame. There are two second base plates, symmetrically fixedly installed at the inner ends of the U-shaped frames. There are two connecting rods, each movably installed on one of the two second base plates. There are two limiting springs, each sleeved on one of the two connecting rods, and the limiting springs are simultaneously located at the upper ends of the second base plates. There are two anti-detachment plates, each fixedly installed at the upper ends of one of the two connecting rods. There are two first base plates, each fixedly installed at the lower ends of one of the two connecting rods. There are two fixed base plates, each fixedly installed at the outer ends of one of the two first base plates. A cleaning roller is rotatably installed on the two U-shaped frames on the two limiting supports. The cleaning roller contacts the upper outer wall of the sand screening cylinder. The cleaning roller consists of a rotating roller and cleaning bristles, with the cleaning bristles fixedly installed on the outer wall of the rotating roller.

[0007] Preferably, a feed hopper is fixedly installed at the upper end of the bottom support, and the feed hopper is inserted into the feed inlet of the sand screening cylinder.

[0008] Preferably, the sand screening cylinder is located within two limiting supports.

[0009] Preferably, the U-shaped frame on the limiting bracket has mounting holes, and the second substrate has through holes.

[0010] Preferably, the fixed base plate on the limiting bracket is fixedly installed at the upper end of the bottom bracket, the connecting rod is movably installed in the through hole opened on the second base plate, the anti-detachment plate is located above the second base plate, and the first base plate is located below the second base plate.

[0011] Preferably, the rotating roller on the cleaning roller is rotatably mounted in two mounting holes opened on two U-shaped frames, and the cleaning bristles can be inserted into the mesh holes on the sand screening cylinder.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting up a limiting bracket and a cleaning roller, the cleaning roller can clean the sand and debris blocking the mesh of the sand screening cylinder, thereby keeping the mesh of the sand screening cylinder unobstructed. This ensures that smaller sand particles that meet the requirements can pass through the mesh of the sand screening cylinder efficiently, ultimately improving the sand screening efficiency. The presence of the limiting bracket can squeeze the cleaning roller against the sand screening cylinder, allowing the cleaning roller to fit tightly against the sand screening cylinder, thus enabling the cleaning roller to have a better cleaning effect on the mesh of the sand screening cylinder. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the limiting bracket and cleaning roller of this utility model;

[0016] Figure 3 For the present utility model Figure 2 A magnified view of point A;

[0017] Figure 4 For the present utility model Figure 2 Enlarged view of point B.

[0018] In the diagram: 1. Bottom support; 2. Drive assembly; 3. Sand screening cylinder; 4. Limiting support; 5. Cleaning roller; 6. Feed hopper; 7. First base plate; 8. Connecting rod; 9. Limiting spring; 10. Anti-detachment plate; 11. Second base plate; 12. U-shaped frame; 13. Mounting hole; 14. Rotating roller; 15. Cleaning brush bristles; 16. Fixed base plate. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a sand screening device for construction sites includes a bottom support 1. A drive assembly 2 is fixedly installed on the upper end of the bottom support 1, and a sand screening cylinder 3 is rotatably installed on the drive assembly 2. A feed hopper 6 is fixedly installed on the upper end of the bottom support 1, and the feed hopper 6 is inserted into the feed inlet of the sand screening cylinder 3. The sand screening cylinder 3 is located within two limiting supports 4. Two limiting supports 4 are symmetrically fixedly installed on the upper end of the bottom support 1. Each limiting support 4 consists of a fixed base plate 16, a first base plate 7, a connecting rod 8, a limiting spring 9, an anti-detachment plate 10, a second base plate 11, and a U-shaped frame 12. There are two second base plates 11, which are symmetrically fixedly installed within the U-shaped frame 12. At the end, there are two connecting rods 8, each movably mounted on one of the two second base plates 11. There are two limiting springs 9, each sleeved on one of the two connecting rods 8, and the limiting springs 9 are simultaneously located at the upper end of the second base plate 11. There are two anti-detachment plates 10, each fixedly mounted on the upper end of one of the two connecting rods 8. There are two first base plates 7, each fixedly mounted on the lower end of one of the two connecting rods 8. There are two fixing base plates 16, each fixedly mounted on the outer end of one of the two first base plates 7. A cleaning roller 5 is rotatably mounted on one of the two U-shaped frames 12 on the two limiting brackets 4. The cleaning roller 5 contacts the upper outer wall of the sand screening cylinder 3. The cleaning roller 5 consists of a rotating roller 14 and cleaning bristles 15. The bristles 15 are fixedly installed on the outer wall of the rotating roller 14. During sand screening, the sand to be screened can be put into the screening cylinder 3 through the feed hopper 6. At this time, driven by the drive component 2, the rotating screening cylinder 3 will screen the sand. During this process, the sand with smaller particle size that meets the requirements will pass through the mesh on the screening cylinder 3, while the larger sand, gravel and impurities will continue to roll down along the screening cylinder 3 and finally fall out from the discharge end of the screening cylinder 3, thus completing the sand screening work. During the sand screening process of the screening cylinder 3, as the screening cylinder 3 rotates, the cleaning roller 5 will rub against the screening cylinder 3, so the cleaning roller 5 will be in a limited position. The U-shaped frame 12 on the support 4 rotates, and as the cleaning roller 5 rotates, the cleaning bristles 15 insert into the mesh of the sand screening cylinder 3. The cleaning bristles 15 can push out the sand and debris blocked in the mesh of the sand screening cylinder 3, thus keeping the mesh of the sand screening cylinder 3 unobstructed. This ensures that the sand with a small particle size that meets the requirements can pass through the mesh of the sand screening cylinder 3, thereby improving the efficiency of sand screening. The presence of the limiting support 4 can squeeze the cleaning roller 5 against the sand screening cylinder 3, so that the cleaning roller 5 can stick tightly to the sand screening cylinder 3, thus giving the cleaning roller 5 a better cleaning effect on the mesh of the sand screening cylinder 3.

[0021] Furthermore, the U-shaped frame 12 on the limiting bracket 4 is provided with mounting holes 13, and the second base plate 11 is provided with through holes. The fixed base plate 16 on the limiting bracket 4 is fixedly installed on the upper end of the bottom bracket 1. The connecting rod 8 is movably installed in the through holes opened on the second base plate 11. The anti-detachment plate 10 is located above the second base plate 11, and the first base plate 7 is located below the second base plate 11. Under the elastic force of the limiting spring 9, the second base plate 11 and the U-shaped frame 12 will be pushed downward. At this time, the cleaning roller 5 installed on the U-shaped frame 12 will be in close contact with the sand screening cylinder 3 under the elastic force of the limiting spring 9.

[0022] Furthermore, the rotating roller 14 on the cleaning roller 5 is rotatably installed in the two mounting holes 13 opened on the two U-shaped frames 12. The cleaning bristles 15 can be inserted into the mesh holes on the sand screening cylinder 3. The diameter of the cleaning bristles 15 should be smaller than the diameter of the mesh holes on the sand screening cylinder 3, so that the cleaning bristles 15 can be smoothly inserted into the mesh holes on the sand screening cylinder 3 during the friction rotation of the cleaning roller 5 with the sand screening cylinder 3.

[0023] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A sand screening device for construction sites, comprising a bottom support (1), wherein a driving assembly (2) is fixedly installed at the upper end of the bottom support (1), and a sand screening cylinder (3) is rotatably installed on the driving assembly (2), characterized in that: Two limiting brackets (4) are symmetrically fixedly installed on the upper end of the bottom bracket (1). Each limiting bracket (4) consists of a fixed base plate (16), a first base plate (7), a connecting rod (8), a limiting spring (9), an anti-detachment plate (10), a second base plate (11), and a U-shaped frame (12). There are two second base plates (11) and they are symmetrically fixedly installed on the inner end of the U-shaped frame (12). There are two connecting rods (8) and they are movably installed on the two second base plates (11). There are two limiting springs (9) and they are respectively sleeved on the two connecting rods (8). The limiting springs (9) are located at the upper end of the second base plate (11). There are two anti-detachment plates (10) and they are fixedly installed on the upper ends of the two connecting rods (8). There are two first base plates (7) and they are fixedly installed on the lower ends of the two connecting rods (8). There are two fixed base plates (16) and they are fixedly installed on the outer ends of the two first base plates (7). A cleaning roller (5) is rotatably installed on the two U-shaped frames (12) on the two limiting brackets (4). The cleaning roller (5) is in contact with the upper outer wall of the sand screening cylinder (3). The cleaning roller (5) is composed of a rotating roller (14) and cleaning bristles (15). The cleaning bristles (15) are fixedly installed on the outer wall of the rotating roller (14).

2. The sand screening device for construction sites according to claim 1, characterized in that: The bottom support (1) is fixedly installed with a feed hopper (6), which is inserted into the feed inlet of the sand screening cylinder (3).

3. A sand screening device for construction sites according to claim 2, characterized in that: The sand screening cylinder (3) is located inside the two limiting brackets (4).

4. A sand screening device for construction sites according to claim 3, characterized in that: The U-shaped frame (12) on the limiting bracket (4) has an installation hole (13), and the second substrate (11) has a through hole.

5. A sand screening device for construction sites according to claim 4, characterized in that: The fixed base plate (16) on the limiting bracket (4) is fixedly installed on the upper end of the bottom bracket (1), the connecting rod (8) is movably installed in the through hole opened on the second base plate (11), the anti-detachment plate (10) is located above the second base plate (11), and the first base plate (7) is located below the second base plate (11).

6. A sand screening device for construction sites according to claim 5, characterized in that: The rotating roller (14) on the cleaning roller (5) is rotatably installed in two mounting holes (13) on two U-shaped frames (12), and the cleaning bristles (15) can be inserted into the mesh holes on the sand screening cylinder (3).

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