Flying dust prevention device for gravel yard

Abstract

A dust raising prevention device for a gravel yard belongs to the technical field of safety and environmental protection of gravel yards and comprises a main box body (2) for containing fine stones, the bottom of the main box body (2) is fixedly connected with a foundation, a feeding port is formed in one side of the main box body (2), one end of a belt conveyor extends into the feeding port and conveys the fine stones on the belt conveyor into the main box body (2), and the other end of the belt conveyor is connected with the main box body (2). The belt conveyor is fixedly connected with the ground through a support, a plurality of discharging window assemblies are arranged on the side face of the main box body (2) from bottom to top and used for discharging fine stone, and a material beating box body (1) is arranged on the side, opposite to a feeding port, of the main box body (2). The material beating box body (1) is arranged at the intersection position of the parabola of the fine stones and the side wall of the main box body (2), and the thrown fine stones slide to the bottom of the main box body (2) after being accumulated in the material beating box body (1). And dust raising in the transportation operation process of the gravel yard can be effectively restrained, the dust raising problem is prevented and controlled physically, safety and environment friendliness are achieved, structural design is simple, and installation is convenient.

Description

Technical Field

[0001] The invention belongs to the field of safety and environmental protection of gravel sites, and in particular relates to a dust prevention device for gravel sites. Background Art

[0002] Fine stone is gravel or crushed stone with a particle size of less than 5mm. At present, in the domestic stone processing industry, many stone yards are facing a serious environmental problem - the dust generated during the reprocessing, transportation and stacking of fine stone. In particular, the dust generated when the material falls to a height of more than 2 meters is more serious. These tiny particles not only seriously pollute the surrounding air quality, but also pose a huge threat to the health of surrounding residents due to the presence of harmful substances such as stone powder and silica dust. Long-term exposure poses a huge threat to the health of surrounding residents, leading to frequent respiratory diseases and seriously affecting the quality of life and health of residents. At the same time, the dust problem also interferes with the daily life of residents, such as obstructed vision and deteriorating living environment, making it difficult for residents to carry out normal outdoor activities or keep the room clean. In view of this, in order to protect the ecological environment and people's health, it is particularly important and urgent to develop a practical and environmentally friendly dust prevention device. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a dust prevention device for a gravel field, thereby effectively suppressing the dust diffusion of fine stone during stone field operations, reducing air pollution, bringing significant improvements to the gravel field of the mining plant and the surrounding environment, and achieving the goal of green production.

[0004] A dust prevention device for a gravel quarry comprises a main box (2) for containing fine stones, the bottom of the main box (2) being fixedly connected to the foundation, a feed port being provided on one side of the main box (2), one end of a belt conveyor extending into the feed port and transporting the fine stones on the belt conveyor to the main box (2), the belt conveyor being fixedly connected to the ground via a bracket, a plurality of discharge window assemblies being provided on the side of the main box (2) from bottom to top, the discharge window assemblies being used to discharge the fine stones, a material beating box (1) being provided on the side of the main box (2) opposite to the feed port, the material beating box (1) being protruded toward the outside of the main box (2), the material beating box (1) being provided at a position where the parabola of the fine stones intersects with the side wall of the main box (2), and the thrown fine stones are accumulated in the material beating box (1) and then slide to the bottom of the main box (2).

[0005] Furthermore, a blanking adjustment plate (12) is provided at the bottom of the material punching box (1), the blanking adjustment plate (12) passes through the outer wall of the material punching box (1), and a driving servo motor (14) is provided to drive the blanking adjustment plate (12) to extend and retract within the material punching box (1) and the main box (2).

[0006] Furthermore, the driving servo motor (14) is connected to the lead screw (13), the blanking adjustment plate (12) is connected to the nut, the lead screw (13) and the nut cooperate, and the driving servo motor (14) transmits power to the blanking adjustment plate (12), and the driving servo motor (14) is installed on the outer wall of the material punching box (1).

[0007] Furthermore, a pressure sensor (11) for measuring the weight of fine stones is provided on the belt conveyor. The pressure sensor (11) transmits the detected weight signal to an intelligent PID frequency conversion controller. The intelligent PID frequency conversion controller adjusts the motor speed of the belt conveyor. The motor controls the operating speed of the belt conveyor to adjust the drop point of the fine stones.

[0008] Furthermore, an intelligent PID frequency conversion controller is provided, and the driving servo motor (14) receives a control signal from the intelligent PID frequency conversion controller and controls the expansion and contraction of the blanking adjustment plate (12), so that the fine stone is thrown onto the blanking adjustment plate (12).

[0009] Furthermore, the discharge window assembly includes a discharge port cut on the side of the main box body (2), and is also provided with a discharge window (3), the area of ​​the discharge window (3) can cover the discharge port, a sealing rubber plate (6) is embedded between the discharge window (3) and the discharge port, and the discharge window (3) is hinged to the main box body (2).

[0010] Furthermore, a sealing belt is provided between the feed port and the belt conveyor.

[0011] Furthermore, the distance between adjacent discharge windows (3) is less than or equal to 1 meter.

[0012] Furthermore, a rotatable lower rubber roller (15) is provided between the blanking adjustment plate (12) and the bottom of the material punching box (1), and a rotatable upper rubber roller (16) is provided on the upper part of the blanking adjustment plate (12) close to the outer wall of the material punching box (1), and the blanking adjustment plate (12) smoothly extends and retracts between the upper rubber roller (16) and the lower rubber roller (15).

[0013] Furthermore, a travel switch for limiting the extension and contraction amount of the blanking regulating plate (12) is provided at the bottom of the material punching box (1).

[0014] Through the above design scheme, the present invention can bring the following beneficial effects: a dust prevention device for a gravel field, which can effectively suppress dust during the transportation operation of the gravel field by setting a material punching box, and is safe and environmentally friendly by physically preventing and controlling dust problems. The structural design is simple and easy to install, and is suitable for use in stone fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of a dust prevention device for a gravel field according to the present invention.

[0016] Figure 2 This is a schematic diagram of a discharge window assembly of a gravel field dust prevention device according to the present invention.

[0017] Figure 3 This is a schematic diagram of a material punching box of a dust prevention device for a gravel field according to the present invention.

[0018] Figure 4 This is a schematic diagram of the foundation connection of a dust prevention device for a gravel field according to the present invention.

[0019] Among them, 1. Material discharge box; 2. Main box; 3. Discharge window; 4. Concrete embedded anchor; 5. Bolt; 6. Sealant sheet; 7. Hinge; 8. Triangular steel plate; 9. Embedded foundation connecting steel plate; 10. Square box connecting steel plate; 11. Pressure sensor; 12. Blanking adjustment plate; 13. Screw; 14. Driving servo motor; 15. Lower rubber roller; 16. Upper rubber roller. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure and function of the present invention, the dust prevention device for a gravel field of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] according to Figures 1 to 4 As shown, the present application provides a dust prevention device for a gravel field. The main box 2 is a square box for holding fine stone. The bottom of the main box 2 is fixedly connected to the foundation. The main box 2 is also used to seal the dust inside. A feed port is provided on one side of the main box 2. One end of the belt conveyor extends into the feed port of the main box 2, and the fine stone on the belt conveyor is poured into the main box 2. The drop height of the fine stone is greater than 2 meters. The conveyor belt of the belt conveyor adopts a belt. The belt conveyor is fixedly connected to the ground by a bracket. The bracket is set at two different heights. The fine stone is supported by the belt conveyor and tilted upward to enter the feed port of the main box 2.

[0022] A square-shaped hopper 1 is located on the side of the main housing 2 opposite the feed inlet. Fine stone is thrown into the hopper 1 through the feed inlet. The hopper 1 is located where the parabola of the fine stone intersects the side wall of the main housing 2. The belt conveyor pulley closest to the main housing 2 is the first pulley, and the hopper 1 is located below the first pulley. Fine stone gradually accumulates at the bottom of the hopper 1 and then slides to the bottom of the main housing 2. The hopper 1 is used to buffer fine stone, scatter fine stone (fine stone hitting each other, and fine stone hitting dust), alleviate dust, and reduce wear on the main housing 2.

[0023] The belt conveyor is driven by a first power source, which includes an electric motor. Half the diameter of the belt conveyor's first pulley is located within the main housing 2. Sealing tape is installed between the feed inlet and the belt conveyor to prevent dust from escaping from the feed inlet into the surrounding air. This is achieved by placing adhesive tape around the feed inlet.

[0024] The foundation of the main box 2 consists of two parts, an upper part and a lower part. The lower part is a concrete base with a built-in threaded steel welded steel cage. The upper part is a pillar foundation with a steel cage and a concrete embedded anchor 4 inside. The concrete embedded anchor 4 is fixedly connected to the main box 2 to prevent the main box 2 from displacement and sinking under the action of external force. The upper concrete embedded anchor 4 and the lower steel cage are welded as one, and the upper steel cage and the concrete embedded anchor 4 are set in the concrete. The top of the concrete embedded anchor 4 is welded to the embedded foundation connecting steel plate 9 to increase stability. The main box 2 is fixedly connected to the embedded foundation connecting steel plate 9 by bolts 5. Bolt holes are equidistantly positioned on the embedded foundation connecting steel plate 9, and the bolt holes are welded to the bolts 5.

[0025] The main housing 2 is welded from steel plates, and several equally spaced discharge window assemblies are arranged on the side of the main housing 2 from bottom to top. The discharge window assembly includes a square discharge port cut into the side of the main housing 2 and a square discharge window 3 with an area sufficient to cover the square discharge port. A sealing rubber sheet 6 is embedded on one side of the discharge window 3 and the discharge port to seal the discharge window 3 with the discharge port. The discharge window 3 is hinged to the main housing 2 via a hinge 7 welded to the upper edge of the discharge port. The maximum distance between the discharge window 3 closest to the ground and the ground is less than or equal to 1 meter, and the distance between adjacent discharge windows 3 is less than or equal to 1 meter.

[0026] Four square box connecting steel plates 10 are welded to the bottom of the main box body 2. Holes for matching with bolts 5 are provided on the square box connecting steel plates 10. Triangular steel plates 8 are also welded on the square box connecting steel plates 10. The square box connecting steel plates 10 are fixedly connected to the embedded foundation connecting steel plates 9 by bolts 5.

[0027] A pressure sensor 11 for measuring the weight of fine stone on the belt is provided on the belt conveyor. The pressure sensor 11 transmits the detected weight signal to the intelligent PID frequency conversion controller; or a belt conveyor with a weighing function on the market is selected to transmit the detected weight signal to the intelligent PID frequency conversion controller. The intelligent PID frequency conversion controller adjusts the motor speed of the belt conveyor, and then adjusts the operating speed of the belt conveyor to adjust the throwing point of the fine stone.

[0028] A drive servo motor 14 is mounted on the outer wall of the material discharging box 1 and is connected to a lead screw 13. A material drop adjustment plate 12 is located at the bottom of the material discharging box 1. This plate 12 extends through the outer wall of the material discharging box 1 and into the bottom of the box 1. This plate 12 is used to catch dropped fine stone. The plate 12 is connected to a nut, which engages with a lead screw 13. The drive servo motor 14, through the lead screw 13 and nut, drives the plate 12 into and out of the main box 2 and back into the material discharging box 1.

[0029] A rotatable lower rubber roller 15 is installed between the blanking adjustment plate 12 and the bottom of the material discharging box 1 to reduce friction between the blanking adjustment plate 12 and the bottom of the material discharging box 1. A rotatable upper rubber roller 16 is installed on the upper portion of the blanking adjustment plate 12, near the outer wall of the material discharging box 1. The blanking adjustment plate 12 smoothly extends and retracts between the upper and lower rubber rollers 16 and 15. The extension of the blanking adjustment plate 12 is determined by two front and rear travel switches. The upper rubber roller 16 prevents the blanking adjustment plate 12 from bending and deforming, which could cause the lead screw 13 and nut to become stuck and damaged. By reducing sticking, it also reduces energy consumption of the drive servo motor 14 and prevents overload of the drive servo motor 14.

[0030] After receiving the control signal from the intelligent PID frequency conversion controller, the driving servo motor 14 controls the extension and retraction of the blanking adjustment plate 12, so that the fine stone is thrown onto the blanking adjustment plate 12. By controlling the motor speed of the belt conveyor and the extension amount of the blanking adjustment plate 12 into the main box 2, the fine stone falling onto the blanking adjustment plate 12 can be accurately controlled to adapt to different fine stone conveying speeds and conveying volumes. When the fine stone on the belt conveyor is too heavy to increase the motor speed of the belt conveyor, only the extension amount of the blanking adjustment plate 12 into the main box 2 is adjusted. When the fine stone on the belt conveyor is too light, only the motor speed of the belt conveyor is adjusted, and the blanking adjustment plate 12 is retracted to reduce its wear. The threshold values ​​for fine stone being too heavy and too light are pre-set in the intelligent PID frequency conversion controller.

[0031] Workflow:

[0032] Start the belt conveyor, and the fine stone on the belt conveyor is thrown into the material discharging box 1 through the feed port on the side wall of the main box 2. The fine stone is hit and suppresses the dust in the material discharging box 1, and buries it in the fine stone pile. After the fine stone fills the material discharging box 1, it slides to the bottom of the main box 2, causing dust to rise. The fine stone that enters the bottom of the main box 2 is hit and suppresses the dust at the bottom of the main box 2, and buries it in the fine stone pile, achieving the effect of cyclic physical dust reduction. When the fine stone at the bottom of the main box 2 accumulates at the discharge window 3, the fine stone flows out of the main box 2 through the discharge window 3. The discharge windows 3 at different heights reduce the height difference in layers, which helps to suppress the dust generated by the high height difference.

[0033] It should be understood that although the present application is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. 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.

[0034] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not used to limit the scope of protection of the present application. Any equivalent embodiments or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A dust prevention device for a gravel field, comprising a main box (2) for containing fine stones, the bottom of the main box (2) being fixedly connected to the foundation, a feed port being provided on one side of the main box (2), one end of a belt conveyor extending into the feed port and transporting the fine stones on the belt conveyor to the main box (2), the belt conveyor being fixedly connected to the ground via a bracket, a plurality of discharge window assemblies being provided on the side of the main box (2) from bottom to top, the discharge window assemblies being used to discharge the fine stones, and characterized in that: A material-beating box (1) is provided on the side of the main box (2) opposite to the feed port, and the material-beating box (1) protrudes outward from the main box (2). The material-beating box (1) is provided at a position where the parabola of the fine stone material intersects with the side wall of the main box (2), and the thrown fine stone material accumulates in the material-beating box (1) and then slides to the bottom of the main box (2).

2. The dust prevention device for a gravel field according to claim 1 is characterized in that The bottom of the material punching box (1) is also provided with a blanking adjustment plate (12), which passes through the outer wall of the material punching box (1). A driving servo motor (14) is also provided to drive the blanking adjustment plate (12) to extend and retract within the material punching box (1) and the main box (2).

3. The dust prevention device for a gravel field according to claim 2, characterized in that: The driving servo motor (14) is connected to the lead screw (13), and the blanking adjustment plate (12) is connected to the nut. The lead screw (13) and the nut cooperate, and the driving servo motor (14) transmits power to the blanking adjustment plate (12). The driving servo motor (14) is installed on the outer side wall of the material punching box (1).

4. The dust prevention device for a gravel field according to claim 1, characterized in that: The belt conveyor is provided with a pressure sensor (11) for measuring the weight of fine stones. The pressure sensor (11) transmits the detected weight signal to an intelligent PID frequency conversion controller. The intelligent PID frequency conversion controller adjusts the motor speed of the belt conveyor. The motor controls the operating speed of the belt conveyor to adjust the drop point of the fine stones.

5. The dust prevention device for a gravel field according to claim 3, characterized in that: An intelligent PID frequency conversion controller is also provided. The driving servo motor (14) receives a control signal from the intelligent PID frequency conversion controller and controls the expansion and contraction of the blanking adjustment plate (12) so that the fine stone is thrown onto the blanking adjustment plate (12).

6. The dust prevention device for a gravel field according to claim 1, characterized in that: The discharge window assembly includes a discharge port cut on the side of the main box body (2), and is also provided with a discharge window (3). The area of ​​the discharge window (3) can cover the discharge port. A sealing rubber plate (6) is embedded between the discharge window (3) and the discharge port. The discharge window (3) is hinged to the main box body (2).

7. The dust prevention device for a gravel field according to claim 1, characterized in that: A sealing belt is provided between the feed port and the belt conveyor.

8. The dust prevention device for a gravel field according to claim 6, characterized in that: The distance between adjacent discharge windows (3) is less than or equal to 1 meter.

9. The dust prevention device for a gravel field according to claim 3, characterized in that: A rotatable lower rubber roller (15) is provided between the blanking adjustment plate (12) and the bottom of the material punching box (1), and a rotatable upper rubber roller (16) is provided on the upper part of the blanking adjustment plate (12) close to the outer wall of the material punching box (1). The blanking adjustment plate (12) smoothly expands and contracts between the upper rubber roller (16) and the lower rubber roller (15).

10. The dust prevention device for a gravel field according to claim 9, characterized in that: A travel switch for limiting the extension and contraction amount of the blanking regulating plate (12) is provided at the bottom of the blanking box (1).

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