A sand and stone screening device for construction engineering

Abstract

The utility model discloses a sandstone screening device for building engineering, including frame, hopper and screening subassembly, hopper is located at the top of frame, and the below of hopper is provided with the blanking opening, and hopper is provided with control valve in the position of blanking opening, and screening subassembly includes fixed axle, screening frame and first motor, the cross section of screening frame is sector structure, and screening frame is provided with multiple groups, and is fixed on fixed axle according to equal angle, and fixed axle rotatory mounting is established on the frame, the utility model discloses a plurality of screening frames are set up, and screening frame and two movable plates form an independent sandstone screening space, and the grit of small particle can pass through screen cloth, and the stone of big particle is left in screening frame, when first motor drives screening frame and movable plate to rotate, has enough screening time, can realize complete separation to grit and stone.

Description

Technical Field

[0001] This utility model discloses a sand and gravel screening device for construction engineering, belonging to the field of screening equipment technology. Background Technology

[0002] In the construction industry, fine sand is generally used as the fine aggregate in mortar. In order to obtain fine sand with the required particle size, the raw materials of sand and gravel generally need to be screened. Existing screening devices usually place an inclined screen on the ground, and use an iron shovel to scoop up the sand and gravel and pour it directly onto the screen to achieve simple screening of sand and gravel. However, because the sand and gravel stay on the screen for a short time, the screening of sand and gravel is incomplete and the work efficiency is low. Furthermore, when sand and gravel accumulate on both sides of the screen, they need to be manually moved and cleaned, which is time-consuming and labor-intensive. Utility Model Content

[0003] The purpose of this invention is to solve the problems in the prior art and provide a sand and gravel screening device for construction engineering.

[0004] This utility model achieves the above-mentioned objectives through the following technical solution: a sand and gravel screening device for construction engineering, comprising a frame, a hopper, and a screening assembly. The hopper is located at the top of the frame, and a discharge port is provided below the hopper. A control valve is provided at the position of the discharge port corresponding to the hopper. The screening assembly includes a fixed shaft, a screening frame, and a first motor. The screening frame has a fan-shaped cross-section, and multiple screening frames are provided, fixed at equal angles on the fixed shaft. The fixed shaft is rotatably mounted on the frame. The first motor is mounted on the frame, and the output shaft of the first motor is fixedly connected to the fixed shaft. A through hole is provided in the middle of the screening frame, and two movable plates are slidably arranged on the screening frame. Screens are provided on both sides of the screening frame and on the movable plates. A power assembly is provided on the frame for driving the two movable plates on the same screening frame to move away from or towards each other. Two sets of material guiding assemblies are provided below the screening assembly on the frame, and discharge ports and discharge plates are provided on both sides of the frame.

[0005] Preferably, the material guiding assembly includes a material guiding plate, a second motor, a rotating shaft, a take-up reel, and a pull rope. A first connecting rod and a second connecting rod are respectively provided on both sides of the material guiding plate. The first connecting rod is rotatably connected to the frame. The frame is provided with an arc-shaped groove for the second connecting rod to slide, the center of which is located on the axis of the first connecting rod. The rotating shaft is rotatably mounted on the frame, and the take-up reel is fixed to the rotating shaft. The frame is provided with a bracket for mounting the second motor, and the output shaft of the second motor is fixedly connected to the rotating shaft. One end of the pull rope is fixed to the second connecting rod, and the other end is wound onto the take-up reel. The material guiding plates in the two sets of material guiding assemblies have an inverted V-shaped structure.

[0006] Preferably, one end of the guide plate extends into the discharge port, and the included angle between the two guide plates when their ends abut against each other is 120-150°.

[0007] Preferably, the power assembly includes a cylinder and a fixing block. The cylinder is fixed on the frame, the fixing block is fixed on the piston of the cylinder, the movable plate is provided with a protrusion, the fixing block has a through groove to avoid the protrusion, and the screening frame is provided with a limit block.

[0008] Preferably, the filter boxes are arranged in four groups at equal angles with the fixed axis as the center, and the power components are arranged in four groups distributed vertically.

[0009] Preferably, guide strips are provided on both sides of the filter frame, and grooves that cooperate with the guide strips are provided on both sides of the movable plate.

[0010] Preferably, the two movable plates on the same screening frame are respectively provided with nylon plugs and positioning holes, the nylon plugs and positioning holes cooperate, and the two inner walls of the screening frame distributed along the fixed axis have guide surfaces inclined towards the movable plates.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By setting up multiple screening frames and movable plates, each screening frame can hold a certain amount of sand and gravel. Then, the first motor drives the fixed shaft to rotate, so that the independent screening space formed by the screening frames and movable plates can drive the sand and gravel to rotate synchronously. The sand and gravel roll in the screening space, thereby separating the fine sand and gravel particles and the large stones.

[0013] 2. By setting up a power component and a material guiding component, the power component can drive two movable plates to slide horizontally on the screening frame, which can realize the automatic feeding of sand and gravel raw materials and the unloading of screened stones. The material guiding component can guide the sand and gravel to both sides of the frame, while the stones can fall automatically, thereby achieving the separation of the two. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a sand and gravel screening device for construction engineering according to the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of a sand and gravel screening device for construction engineering according to the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the screening component and the power component in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the filter box in this utility model;

[0018] Reference numerals in the attached drawings: 1. Hopper; 2. Frame; 3. Rewinding reel; 4. Discharge port; 5. Discharge plate; 6. First connecting rod; 7. Pull rope; 8. Arc groove; 9. Second connecting rod; 10. Support; 11. Second motor; 12. First motor; 13. Power assembly; 14. Screening frame; 15. Rotating shaft; 16. Guide plate; 17. Fixed block; 18. Movable plate; 19. Protrusion; 20. Screen; 21. Limiting block; 22. Cylinder; 23. Through groove; 24. Fixed shaft; 25. Through hole; 26. Guide strip. Detailed Implementation

[0019] 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.

[0020] like Figures 1-4 As shown, a sand and gravel screening device for construction engineering includes a frame 2, a hopper 1, and a screening assembly. The hopper 1 is located at the top of the frame 2, and a discharge port is provided below the hopper 1. A control valve is provided at the position of the discharge port on the hopper 1. The screening assembly includes a fixed shaft 24, a screening frame 14, and a first motor 12. The screening frame 14 has a fan-shaped cross-section, and multiple sets of screening frames 14 are provided and fixed at equal angles on the fixed shaft 24. The fixed shaft 24 is rotatably mounted on the frame 2, and the first motor 12 is mounted on the frame 2. The output shaft of the first motor 12 is fixedly connected to the fixed shaft 24. A through hole 25 is provided in the middle of the screening frame 14. Two movable plates 18 are slidably arranged on the screening frame 14. Screens 20 are provided on both sides of the screening frame 14 and on the movable plates 18. A power component 13 is provided on the frame 2 to drive the two movable plates 18 on the same screening frame 14 to move away from each other or close to each other. Two sets of material guiding components are provided below the screening components on the frame 2. A discharge port 4 and a discharge plate 5 are provided on both sides of the frame 2.

[0021] The material guiding assembly includes a guide plate 16, a second motor 11, a rotating shaft 15, a take-up reel 3, and a pull rope 7. A first connecting rod 6 and a second connecting rod 9 are respectively provided on both sides of the guide plate 16. The first connecting rod 6 is rotatably connected to the frame 2. The frame 2 is provided with an arc-shaped groove 8 for the second connecting rod 9 to slide, the center of which is located on the axis of the first connecting rod 6. The rotating shaft 15 is rotatably mounted on the frame 2, and the take-up reel 3 is fixed to the rotating shaft 15. A bracket 10 for mounting the second motor 11 is provided on the frame 2, and the output shaft of the second motor 11 is fixedly connected to the rotating shaft 15. One end of the pull rope 7 is fixed to the second connecting rod 9, and the other end is wound onto the take-up reel 3. Two sets of material guiding assemblies are provided. The guide plate 16 in the component has an inverted V-shaped structure. The second motor 11 drives the rotating shaft 15 to rotate, and the rotating shaft 15 drives the winding wheel 3 to rotate, so that the winding wheel 3 can wind up or unwind the pull rope 7. When the pull rope 7 is wound up, the pull rope 7 can drive one end of the guide plate 16 to slide along the arc groove 8, so that an opening appears between the two guide plates 16, which facilitates the subsequent falling of stones in the screening frame 14. When the pull rope 7 is unwound, the guide plate 16 will slide along the arc groove 8 under the action of its gravity. In this way, one end of the two guide plates 16 abuts against each other, so that when the screening frame 14 screens sand and gravel, the sand and gravel can fall onto the guide plate 16 and fall from the discharge port 4.

[0022] One end of the guide plate 16 extends into the discharge port 4. The included angle between the two guide plates 16 when their ends touch is 120-150°. After the sand and gravel are screened, they fall onto the guide plate 16 and slide down along the guide plate 16 to the discharge port 4 of the frame 2, thus avoiding falling onto the inner side of the frame 2. The smaller the included angle between the two guide plates 16, the greater the angle of inclination of the guide plate 16, and the faster the sand and gravel slide down.

[0023] The power assembly 13 includes a cylinder 22 and a fixed block 17. The cylinder 22 is fixed on the frame 2, and the fixed block 17 is fixed on the piston of the cylinder 22. The movable plate 18 is provided with a protrusion 19, and the fixed block 17 has a through groove 23 to avoid the protrusion 19. The screening frame 14 is provided with a limit block 21. When the first motor 12 drives the fixed shaft 24, the screening frame 14 and the movable plate 18 to rotate, the protrusion 19 on the movable plate 18 will pass through the through groove 23 on the fixed block 17, and there will be no interference between them. When the sand and gravel screening stops, the protrusion 19 on the upper and lower movable plates 18 is just located in the through groove 23. When the cylinder 22 drives the fixed block 17 to move, the fixed block 17 can drive the protrusion 19 and the movable plate 18 to move synchronously, so that the two movable plates 18 can move closer to each other or further away from each other.

[0024] Four sets of screening frames 14 are arranged at equal angles around the fixed axis 24. Four sets of power components 13 are arranged vertically. Guide strips 26 are provided on both sides of the screening frames 14. Grooves that cooperate with the guide strips 26 are provided on both sides of the movable plate 18. Multiple screening frames 14 can speed up the efficiency of sand and gravel screening. The power components 13 can enable one set of screening frames 14 to automatically feed sand and gravel, and enable the stones in another set of screening frames 14 to fall out.

[0025] Two movable plates 18 on the same screening frame 14 are respectively provided with nylon plugs and positioning holes. The nylon plugs and positioning holes cooperate with each other. The two inner walls of the screening frame 14, which are axially distributed along the fixed shaft 24, have guide surfaces that are inclined towards the movable plates 18. When the two movable plates 18 are driven by the two sets of power components 13, they abut against each other, so that the nylon plugs are inserted into the positioning holes. This gives the two movable plates 18 a certain resistance when they move away from each other. In this way, when the screening frame 14 and the movable plates 18 rotate with the fixed shaft 24, the movable plates 18 will not slide, thereby preventing sand and gravel from falling out of the screening frame 14 before it is completely screened. After the sand and gravel are screened, the stones in the screening frame 14 will slide towards the movable plates 18 along the guide surfaces when the material is automatically unloaded, thereby reducing the amount of stones remaining in the screening frame 14.

[0026] Working principle: During operation, the two sets of power units 13 located at the upper end of the frame 2 drive the two movable plates 18 on one of the screening frames 14 to move away from each other. Then, the control valve at the lower end of the hopper 1 controls the sand and gravel inside the hopper 1 to automatically fall into the screening frame 14. When the amount of sand and gravel reaches 70%-80% of the volume of the screening frame 14, the power unit 13 drives the two movable plates 18 to close the through hole 25 of the screening frame 14. The feeding of other screening frames 14 is also carried out in the same way. During this process, the two guide plates 16 are in a state of mutual contact. When all the screening frames 14 are fed... After completion, the first motor 12 drives the fixed shaft 24 and the screening frame 14 to rotate continuously, causing the sand and gravel to roll inside the screening frame 14 and be screened through different screens 20. Small sand and gravel particles fall onto the guide plate 16 after passing through the screen 20 and fall out of the discharge port 4, while larger stones remain inside the screening frame 14. After screening is completed, the two movable plates 18 on the lower screening frame 14 move away from each other under the drive of the power component 13, causing the stones to fall through the through holes 25 on the screening frame 14, thereby achieving the effect of automatic unloading.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sand and gravel screening device for construction engineering, comprising a frame (2), a hopper (1), and screening components, characterized in that, The hopper (1) is located at the top of the frame (2), and a discharge port is provided below the hopper (1). A control valve is provided at the position of the discharge port corresponding to the hopper (1). The screening assembly includes a fixed shaft (24), a screening frame (14), and a first motor (12). The screening frame (14) has a fan-shaped cross-section, and multiple screening frames (14) are provided and fixed at equal angles on the fixed shaft (24). The fixed shaft (24) is rotatably mounted on the frame (2). The first motor (12) is mounted on the frame (2), and the output shaft of the first motor (12) is connected to the fixed shaft (24). A shaft (24) is fixedly connected. A through hole (25) is provided in the middle of the screening frame (14). Two movable plates (18) are slidably arranged on the screening frame (14). Screens (20) are provided on both sides of the screening frame (14) and on the movable plates (18). A power component (13) is provided on the frame (2) for driving the two movable plates (18) on the same screening frame (14) to move away from each other or closer to each other. Two sets of material guiding components are provided below the screening components on the frame (2). A discharge port (4) and a discharge plate (5) are provided on both sides of the frame (2).

2. The sand and gravel screening device for construction engineering according to claim 1, characterized in that, The material guiding assembly includes a material guiding plate (16), a second motor (11), a rotating shaft (15), a take-up wheel (3), and a pull rope (7). The material guiding plate (16) is provided with a first connecting rod (6) and a second connecting rod (9) on both sides. The first connecting rod (6) is rotatably connected to the frame (2). The frame (2) is provided with an arc-shaped groove (8) for the second connecting rod (9) to slide. The center of the arc-shaped groove (8) is located on the axis of the first connecting rod (6). The rotating shaft (15) is rotatably mounted on the frame (2). The take-up wheel (3) is fixed on the rotating shaft (15). The frame (2) is provided with a bracket (10) for mounting the second motor (11). The output shaft of the second motor (11) is fixedly connected to the rotating shaft (15). One end of the pull rope (7) is fixed on the second connecting rod (9), and the other end is wound on the take-up wheel (3). The material guiding plate (16) in the two sets of material guiding assemblies has an inverted V-shaped structure.

3. The sand and gravel screening device for construction engineering according to claim 2, characterized in that, One end of the guide plate (16) extends into the outlet (4), and the included angle between the two guide plates (16) when their ends touch is 120-150°.

4. The sand and gravel screening device for construction engineering according to claim 1, characterized in that, The power assembly (13) includes a cylinder (22) and a fixing block (17). The cylinder (22) is fixed on the frame (2). The fixing block (17) is fixed on the piston of the cylinder (22). The movable plate (18) is provided with a protrusion (19). The fixing block (17) has a through groove (23) to avoid the protrusion (19). The screening frame (14) is provided with a limit block (21).

5. The sand and gravel screening device for construction engineering according to claim 1, characterized in that, The filter box (14) is arranged in four groups at equal angles with the fixed axis (24) as the center, and the power component (13) is arranged in four groups in a vertical distribution.

6. The sand and gravel screening device for construction engineering according to claim 1, characterized in that, The filter box (14) is provided with guide strips (26) on both sides, and the movable plate (18) is provided with grooves that cooperate with the guide strips (26) on both sides.

7. A sand and gravel screening device for construction engineering according to claim 1, characterized in that, Two movable plates (18) on the same screening frame (14) are respectively provided with nylon plugs and positioning holes. The nylon plugs and positioning holes cooperate with each other. The two inner walls of the screening frame (14) distributed along the fixed axis (24) have guide surfaces that are inclined toward the movable plates (18).

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