Dust-proof construction waste disposal sand and stone screening device

Abstract

The utility model discloses a kind of dust-preventing building waste disposal with sand and stone screening device, including machine body and material cylinder, the machine body inside is fixedly connected with fixed frame, the machine body top is installed with material cylinder, the material cylinder right side is provided with dust-preventing mechanism;Dust-preventing mechanism includes filter device and dust-settling device;Filter device is composed of filter box and negative pressure fan, the filter box input end is connected with dust cover by pipeline, the dust cover is fixed on material cylinder top, the negative pressure fan is installed in filter box right side, filter cartridge is installed in the filter box inner wall, flowmeter is installed between the negative pressure fan input end and filter cartridge, the negative pressure fan output end is connected to dust-settling chamber by pipeline.This utility model is provided with dust-preventing mechanism, can suck dust negative pressure at entrance, and after filtration, remove inclusions garbage, again through water curtain spray realizes wet type settlement, to effectively reduce air dust concentration, improve dust-settling effect, it is convenient for subsequent centralized recovery processing.

Description

Technical Field

[0001] This utility model relates to the field of sand and gravel screening technology, specifically to a sand and gravel screening device for construction waste disposal that prevents dust. Background Technology

[0002] Currently, most sand and gravel screening equipment used for construction waste treatment achieves dust control by setting up a negative pressure suction system. The system uses a fan to create a negative pressure airflow in the processing chamber, which promptly extracts the dust generated at the inlet, preventing dust from spreading and polluting the environment.

[0003] However, there are still some defects in the sand and gravel screening devices currently on the market. For example, during the negative pressure dust extraction process, too many particles directly enter the fan channel, which can easily cause wear on the fan blades, reduce ventilation efficiency, and even clog the filter tube, seriously affecting the stability and service life of the equipment. There is no dust suppression mechanism installed. Although fine dust particles are extracted, they are still discharged into the atmosphere with the airflow. No secondary settling treatment is formed, which poses a risk of secondary dust and environmental pollution.

[0004] Therefore, there is an urgent need for a sand and gravel screening device for construction waste disposal that prevents dust generation, in order to solve the above-mentioned technical defects. Utility Model Content

[0005] The purpose of this utility model is to provide a sand and gravel screening device for construction waste disposal that prevents dust, so as to solve the problem of simple negative pressure suction dust prevention without filtration and dust reduction mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sand and gravel screening device for construction waste disposal with dust prevention, comprising a body and a material cylinder. A fixed frame is fixedly connected inside the body, and a material cylinder is installed at the top of the body. A dust prevention mechanism is provided on the right side of the material cylinder. The dust prevention mechanism includes a filtration device and a dust suppression device. The filtration device consists of a filter box and a negative pressure fan. A dust cover is connected to the input end of the filter box through a pipe. The dust cover is fixed to the top of the material cylinder. The negative pressure fan is installed on the right side of the filter box. A filter cartridge is installed on the inner wall of the filter box. A flow meter is installed between the input end of the negative pressure fan and the filter cartridge. The output end of the negative pressure fan is connected to a dust suppression chamber through a pipe. The dust suppression device includes a water tank and a dust suppression chamber. The water tank is located on the right side of the body. A dust suppression chamber is fixed at the top of the water tank. A water pump is installed at the front end of the water tank. The input end of the water pump is connected to the water tank through a pipe. The output end of the water pump is connected to a spray head through a pipe. The spray head is mounted on the top of the dust suppression chamber.

[0007] As a further technical solution of this utility model, a retaining seat is fixedly connected to the left side of the inner wall of the filter box, and the filter cylinder is clamped into the filter box through the retaining seat.

[0008] As a further technical solution of this utility model, the filter cartridge is trumpet-shaped, with the opening diameter gradually decreasing from left to right, and a top cover is installed on the top of the filter box.

[0009] As a further technical solution of this utility model, the bottom of the dust settling chamber is an inclined surface, and a sand discharge port is provided at the lowest point of the inclined surface. A drain outlet is provided at the bottom of the right wall of the dust settling chamber.

[0010] As a further technical solution of this utility model, two sets of tracks are welded to the inner wall of the machine body. A primary screen plate and a secondary screen plate are installed in the tracks from top to bottom. Springs are fixedly connected between the primary screen plate and the secondary screen plate and the inner wall of the track. The primary screen plate and the secondary screen plate are respectively embedded in the track and move. A primary discharge port is opened on the right side of the outer wall of the machine body and the track, and a secondary discharge port is opened on the left side of the outer wall of the machine body and the track.

[0011] As a further technical solution of this utility model, a material trough is provided below both the primary screen plate and the secondary screen plate. The inclination direction of the screen holes inside the primary screen plate and the secondary screen plate is consistent with the direction of the material trough below them. The material troughs extend from the primary discharge port and the secondary discharge port to the outside of the machine body, respectively. A drive motor is fixedly connected to the rear of the outer wall of the machine body. A small arm is fixedly sleeved on the output shaft of the drive motor. A large arm is rotatably sleeved on the end of the small arm. The end of the large arm away from the small arm is hinged to the swing frame. The swing frame is movably hinged to the primary screen plate and the secondary screen plate, respectively.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting up a dust prevention mechanism, dust can be sucked in by negative pressure at the inlet, and the garbage mixed in can be removed by filtration. Then, wet sedimentation can be achieved by water curtain spraying, thereby effectively reducing the concentration of air dust, improving the dust reduction effect, and facilitating subsequent centralized recycling and treatment.

[0013] Equipped with a primary screen plate, a secondary screen plate, a drive motor, a forearm, a boom, a swing frame, tracks, and springs, this system enables the grading and screening of sand and soil in construction waste. At the same time, the staggered and reciprocating screening structure effectively breaks up clumps of sand and soil, improving screening efficiency. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present utility model;

[0015] Figure 2 This is a front view cross-sectional structural diagram of the filtration device of this utility model;

[0016] Figure 3 This is a rear cross-sectional view of the dust suppression device of this utility model.

[0017] Figure 4 This is a schematic diagram of the rear view structure of the display stand of this utility model.

[0018] In the diagram: 1. Machine body; 2. Material cylinder; 3. Dust hood; 4. Filter box; 5. Negative pressure fan; 6. Dust settling chamber; 7. Water tank; 8. Primary discharge port; 9. Fixing frame; 10. Secondary discharge port; 11. Material trough; 12. Spring; 13. Secondary screen plate; 14. Primary screen plate; 15. Track; 16. Swing frame; 17. Card holder; 18. Filter cartridge; 19. Top cover; 20. Flow meter; 21. Water pump; 22. Spray head; 23. Sand discharge port; 24. Drain outlet; 25. Main boom; 26. Forearm; 27. Drive motor. 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] Please see Figure 1-4 This utility model provides an embodiment of a sand and gravel screening device for construction waste disposal with dust prevention, comprising a body 1 and a material cylinder 2. A fixing frame 9 is fixedly connected inside the body 1, and the material cylinder 2 is installed at the top of the body 1. A dust prevention mechanism is provided on the right side of the material cylinder 2. The dust prevention mechanism includes a filtration device and a dust suppression device. The filtration device consists of a filter box 4 and a negative pressure fan 5. A dust cover 3 is connected to the input end of the filter box 4 through a pipe. The dust cover 3 is fixed to the top of the material cylinder 2. The negative pressure fan 5 is installed on the right side of the filter box 4. The negative pressure fan 5 is a DWT-I-4 model, which prevents particles from overflowing. A filter cartridge 18 is installed on the inner wall of the filter box 4 of the air compressor 5. A flow meter 20 is installed between the input end of the negative pressure air compressor 5 and the filter cartridge 18. The flow meter 20 is model RLC-MF400. It monitors the airflow changes in real time, collects the wind speed signal and feeds it back to the PLC controller to determine whether the filter is blocked or the wind speed is abnormal. The output end of the negative pressure air compressor 5 is connected to the dust settling chamber 6 through a pipe. A bracket 17 is fixedly connected to the left side of the inner wall of the filter box 4. The filter cartridge 18 is clamped into the filter box 4 through the bracket 17. The filter cartridge 18 is funnel-shaped and the opening diameter gradually decreases from left to right. A top cover 19 is installed on the top of the filter box 4.

[0021] Specifically, such as Figure 1 and Figure 2As shown, the dust control mechanism includes a filtration device and a dust suppression device. During the process of pouring construction waste into the upper material cylinder 2, dust particles are easily carried upwards, rolling up light debris such as turf and plastic products. Under the negative pressure suction effect formed inside the negative pressure fan 5, the dust quickly enters the filter box 4 through the pipe and is intercepted by the funnel-shaped filter cartridge 18 installed inside, preventing large foreign objects from entering the negative pressure fan 5 and causing damage. The filter cartridge 18 is stably installed on the inner wall of the filter box 4 through the bracket 17. When the flow meter 20 detects that the wind speed change exceeds the set threshold, it is determined that too much debris has accumulated in the filter box 4. At this time, it can be cleaned and replaced by opening the top cover 19.

[0022] The dust suppression device includes a water tank 7 and a dust suppression chamber 6. The water tank 7 is located on the right side of the body 1. The dust suppression chamber 6 is fixed at the top of the water tank 7. A water pump 21 is installed at the front end of the water tank 7. The water pump 21 is a DFP-370A model with good self-priming power. The input end of the water pump 21 is connected to the water tank 7 through a pipe. The output end of the water pump 21 is connected to the spray head 22 through a pipe. The spray head 22 is mounted at the top of the dust suppression chamber 6. The bottom of the dust suppression chamber 6 is an inclined surface. A sand discharge port 23 is set at the lowest point of the inclined surface. A drain port 24 is set at the bottom of the right wall of the dust suppression chamber 6.

[0023] Specifically, such as Figure 1 and Figure 3 As shown, the filtered dust and fine sand particles are driven by the wind and enter the dust settling chamber 6 through the connecting pipe. The spray water is drawn from the water tank 7 by the water pump 21 and sprayed evenly from top to bottom into the interior space of the dust settling chamber 6 through the spray head 22 to form an atomized water curtain to capture dust. After absorbing water and becoming heavier, the fine sand particles fall to the bottom inclined surface of the dust settling chamber 6 under the action of gravity and gradually accumulate. When the accumulation at the bottom increases, the spray cleaning effect can be enhanced by increasing the flow rate of the water pump 21. At the same time, the sand discharge port 23 located at the lowest point of the bottom of the dust settling chamber 6 and the drain port 24 at the bottom of the right wall are opened in sequence to drain away excess water and sand. Some water mixed in with the sand does not affect the treatment.

[0024] Two sets of tracks 15 are welded to the inner wall of the machine body 1. A primary screen plate 14 and a secondary screen plate 13 are installed from top to bottom within the tracks 15. Springs 12 are fixedly connected to both the primary and secondary screen plates 14 and 13, allowing them to move within the tracks 15. A primary discharge port 8 is provided on the right side of the outer wall of both the machine body 1 and the tracks 15, and a secondary discharge port 10 is provided on the left side of the outer wall of both the machine body 1 and the tracks 15. A material trough 11 is provided below both the primary and secondary screen plates 14 and 13. The inclination direction of the screen holes inside the 4 and the secondary screen plate 13 is consistent with the direction of the material trough 11 below it. The material trough 11 extends from the primary discharge port 8 and the secondary discharge port 10 to the outside of the machine body 1. A drive motor 27 is fixedly connected to the rear of the outer wall of the machine body 1. The drive motor 27 is model Y90L-4. The output shaft of the drive motor 27 is fixedly sleeved with a small arm 26. The end of the small arm 26 is rotatably sleeved with a large arm 25. The end of the large arm 25 away from the small arm 26 is hinged to the swing frame 16. The swing frame 16 is movably hinged to the primary screen plate 14 and the secondary screen plate 13 respectively.

[0025] Specifically, such as Figure 1 and Figure 4 As shown, the screening process takes place at the fixed frame 9 inside the machine body 1. The torque output of the drive motor 27 is transmitted to the small arm 26, which drives the large arm 25 to swing repeatedly in a circular manner. This further drives the two sets of swing frames 16 to alternately pull the primary screen plate 14 and the secondary screen plate 13 in a horizontal reciprocating staggered translation. The spring 12 provides buffering and return force during the reciprocating movement of the screen plate, ensuring that the screen plate can maintain stable operation under the intermittent transmission of the drive motor 27, avoiding structural wear or misalignment caused by hard impact, and producing an alternating screening effect, effectively breaking up the clumps of sand and gravel and fine particles in the construction waste. Since the primary screen plate 14 and the secondary screen plate 13 are respectively provided with inclined screen holes in the same direction as the material trough 11, the larger sand and gravel particles cannot pass through the screen holes and roll out from the primary discharge port 8, while the smaller sand and soil particles fall down step by step. After being broken up twice by the secondary screen plate 13, they are all discharged from the secondary discharge port 10, achieving screening while effectively breaking up the clumps of sand and soil.

[0026] Working principle: After sand and gravel are fed into the feed cylinder 2, they first enter the screening chamber. The drive motor 27 drives the small arm 26 and the large arm 25 to move, which in turn drives the swing frame 16 to swing back and forth. The primary screen plate 14 and the secondary screen plate 13 alternately screen within the track 15, realizing the preliminary grading and screening of the waste. Large pieces of sand and gravel are discharged from the primary discharge port 8, while small particles are discharged from the secondary discharge port 10 after being screened by sand and soil, thus completing the grading process. The dust generated during the screening process is collected by the dust hood 3 and then drawn into the filter box by the negative pressure fan 5. 4. The internal filter cartridge 18 is fixed by the bracket 17 to intercept large particles and prevent damage to the fan. The flow meter 20 monitors the wind speed in real time. If a blockage occurs, it is cleaned and maintained through the top cover 19. The residual fine dust and sand enter the dust settling chamber 6 through the pipe. Water is supplied by the water tank 7 and pumped by the water pump 21. The water is sprayed through the spray head 22 to form an atomized water curtain for dust settling. The fine sand after absorbing water is deposited at the bottom and discharged through the sand discharge port 23 and the drain port 24 in sequence for centralized treatment and resource recycling.

[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.

Claims

1. A dust-proof sand and gravel screening device for construction waste disposal, comprising a machine body (1) and a material cylinder (2), characterized in that: The machine body (1) is fixedly connected to a fixed frame (9), and a material cylinder (2) is installed at the top of the machine body (1). A dust prevention mechanism is provided on the right side of the material cylinder (2). The dust control mechanism includes a filtration device and a dust suppression device; the filtration device consists of a filter box (4) and a negative pressure fan (5). The input end of the filter box (4) is connected to a dust cover (3) through a pipe. The dust cover (3) is fixed to the top of the material cylinder (2). The negative pressure fan (5) is installed on the right side of the filter box (4). A filter cartridge (18) is installed on the inner wall of the filter box (4). A flow meter (20) is installed between the input end of the negative pressure fan (5) and the filter cartridge (18). The output end of the negative pressure fan (5) is connected to the dust suppression chamber (6) through a pipe. The dust suppression device includes a water tank (7) and a dust suppression chamber (6). The water tank (7) is located on the right side of the machine body (1). The dust suppression chamber (6) is fixed at the top of the water tank (7). A water pump (21) is installed at the front end of the water tank (7). The input end of the water pump (21) is connected to the water tank (7) through a pipe. The output end of the water pump (21) is connected to the spray head (22) through a pipe. The spray head (22) is mounted at the top of the dust suppression chamber (6).

2. A dust-free construction waste disposal sand and gravel screening device according to claim 1, characterized in that: A retainer (17) is fixedly connected to the left side of the inner wall of the filter box (4), and the filter cylinder (18) is snapped into the filter box (4) through the retainer (17).

3. The sand and gravel screening device for dust-preventing construction waste disposal according to claim 1, characterized in that: The filter cartridge (18) is trumpet-shaped with the opening diameter gradually decreasing from left to right, and the filter box (4) is equipped with a top cover (19).

4. The sand and gravel screening device for dust-preventing construction waste disposal according to claim 1, characterized in that: The bottom of the dust settling chamber (6) is an inclined surface, and a sand discharge port (23) is provided at the lowest point of the inclined surface. A drain outlet (24) is provided at the bottom of the right wall of the dust settling chamber (6).

5. The sand and gravel screening device for dust prevention and construction waste disposal according to claim 1, characterized in that: The inner wall of the machine body (1) is welded with two sets of tracks (15). A primary screen plate (14) and a secondary screen plate (13) are installed in the track (15) from top to bottom. A spring (12) is fixedly connected between the primary screen plate (14) and the secondary screen plate (13) and the inner wall of the track (15). The primary screen plate (14) and the secondary screen plate (13) are respectively embedded in the track (15) and move. A primary discharge port (8) is opened on the right side of the outer wall of the machine body (1) and the track (15), and a secondary discharge port (10) is opened on the left side of the outer wall of the machine body (1) and the track (15).

6. The sand and gravel screening device for dust-preventing construction waste disposal according to claim 5, characterized in that: A material trough (11) is provided below both the primary sieve plate (14) and the secondary sieve plate (13). The inclination direction of the sieve holes inside the primary sieve plate (14) and the secondary sieve plate (13) is consistent with the direction of the material trough (11) below them. The material trough (11) extends from the primary discharge port (8) and the secondary discharge port (10) to the outside of the machine body (1). A drive motor (27) is fixedly connected to the rear of the outer wall of the machine body (1). A small arm (26) is fixedly sleeved on the output shaft of the drive motor (27). A large arm (25) is rotatably sleeved on the end of the small arm (26). The end of the large arm (25) away from the small arm (26) is hinged to the swing frame (16). The swing frame (16) is movably hinged to the primary sieve plate (14) and the secondary sieve plate (13) respectively.

Images