A movable intelligent dust suppression device for a stockyard and a control system thereof

Abstract

This invention provides a mobile intelligent dust suppression device and its control system for material yards, relating to the technical field of preventing dust overflow from transportation or storage devices. The invention achieves mechanical-electrical conversion of the fabric trolley's position by linking the curtain body with the rotating ring, enabling partial overlap and conduction detection of the outer and inner metal arc-shaped sheets. This eliminates the need for external power supply sensors to obtain position signals. Simultaneously, the three-dimensional arrangement of mist nozzles at the top and sides of the fabric section ensures that mist droplets envelop the section from three directions, achieving comprehensive coverage and reduced water mist escape. Furthermore, a negative pressure component, moving with the fabric trolley, creates a localized negative pressure zone near the fabric placement point, promptly drawing in and recovering escaped water mist and dust, preventing water mist from spreading to other areas of the material shed. This results in reduced negative pressure energy consumption and directional water mist recovery.

Description

Technical Field

[0001] This invention relates to the field of dust prevention technology in transportation or storage devices, specifically to a mobile intelligent dust suppression device for material yards and its control system. Background Technology

[0002] Mobile intelligent dust suppression devices are widely used in stockyard operations for bulk materials such as coal and ore, aiming to control fugitive dust emissions generated during the material placement process. In enclosed stockyards such as homogenization sheds, overhead conveyor trolleys travel along tracks, generating significant amounts of dust as material falls from the discharge port due to the height difference. This severely pollutes the working environment, threatens personnel health, and poses a dust explosion risk. To meet increasingly stringent environmental emission requirements, related technologies have developed combined dust suppression solutions, including high-pressure micro-mist dust suppression and dry fog dust suppression, reducing dust concentration through zoned control and follow-up spraying.

[0003] Chinese patent CN221439767U discloses a mobile intelligent dust suppression device for material yards, which combines a fogging component with a dry fog dust suppression spray ring: the fogging component has fogging nozzles arranged along both sides and the top of the material distribution section, generating fine mist droplets to cover the material distribution section; the dry fog dust suppression spray ring is installed at the material distribution inlet, forming a dense fog curtain when the material falls. This patent also achieves independent zone control of the fogging component, opening the fogging in corresponding areas according to the position of the material distribution trolley, thus reducing water and energy consumption to a certain extent. However, the device still has the following shortcomings in practical applications: After the mist droplets generated by the fog nozzles cover the fabric section, some of the water mist will escape from both ends and sides of the fabric section to other areas of the material shed, which not only wastes water resources, but may also cause uneven humidity in the material shed or dampness of the equipment; The device does not have any water mist recovery or negative pressure diversion structure, so the escaped dust-laden water mist cannot be effectively captured and recycled, and there is still a risk of dust accumulation after long-term operation; The zone control of its fog components relies on external position sensors or preset programs, and lacks accurate detection means of the actual position of the fabric trolley. When the fabric trolley changes speed or moves back and forth, spray lag or mis-spraying is likely to occur, affecting the dust suppression effect and energy efficiency.

[0004] Therefore, a mobile intelligent dust suppression device for material yards and its control system are provided. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention provides the following technical solution: a mobile intelligent dust suppression device for material yards, comprising a material distribution trolley, an equipment room, and a material distribution section. The material distribution trolley forms a material distribution section during operation, with a material distribution port at the end of the section. The device includes: a misting assembly, consisting of several sets distributed along both sides of the material distribution section; the misting assembly includes misting nozzles, with multiple nozzles spaced apart; some nozzles are positioned at the top of the material distribution section, and others are positioned on both sides of the section, with the mist droplets generated by the nozzles covering the material distribution section; and a water mist spray assembly distributed at the material distribution port to form a dense mist curtain when the material falls. Several curtains are evenly distributed along the direction of the material distribution trolley's movement on the material distribution section. A negative pressure assembly that moves with the material distribution trolley is located beside the material distribution section. Each curtain includes a curtain body and a fixed shaft; the top of the curtain body is rotatably connected to the fixed shaft, and a snap-fit ​​sleeve is fitted around the curtain body. The outer wall of the snap-fit ​​cylinder is provided with a snap-fit ​​groove along the axial direction for snapping the curtain body. Both ends of the fixed shaft are rotatably connected with a rotating ring. Both ends of the fixed shaft are threadedly connected with an end cap. The bottom of the inner wall of the rotating ring is provided with an arc-shaped outer metal arc plate. The top of the outer wall of the fixed shaft is provided with an inner metal arc plate that is offset from the position of the outer metal arc plate. The bottom of the inner end face of the rotating ring is provided with a limiting groove for snapping with the curtain body.

[0006] Furthermore, the inner wall of the rotating ring is provided with an annular stepped groove, and both ends of the fixed shaft are fixedly connected with limiting rings that are limited by the annular stepped groove.

[0007] Furthermore, the gap between the left ends of the inner metal arc sheet and the outer metal arc sheet is greater than the gap between the right ends, and the gaps differ by at least twice.

[0008] Furthermore, the negative pressure assembly includes: a connecting pipe with a rectangular slot on the side near the fabric carriage; two folding plates on the inner wall of the rectangular slot, the folding plates being corrugated plates foldable along their length; one end of each folding plate being fixedly connected to the rectangular slot, and the other end being fixedly connected to the outer wall of the dust collection hood; two parallel sliding rods fixedly connected inside the rectangular slot, with the dust collection hood slidably connected to the two sliding rods; the outer wall of the dust collection hood being fixedly connected to the end of each folding plate; at least one electromagnet fixedly connected on the side of the dust collection hood near the fabric carriage; a magnet on the fabric carriage magnetically connected to the electromagnet; and an inner spiral cylinder coaxially rotatably connected inside the connecting pipe. It includes a central shaft and spiral blades fixedly connected to the outer periphery of the central shaft. The central shaft is a hollow shaft and its outer wall is covered with a PTFE membrane. The spiral blades are located on the outside of the PTFE membrane. A water tank is recessed at the bottom inside the connecting pipe. An arc-shaped filter membrane is fixedly connected to the middle of the water tank. The filter membrane divides the water tank into an upper dust-laden water flow channel and a lower clean water collection area. After the dust-laden water flows through the filter membrane, the dust is trapped on the surface of the filter membrane, and the clean water permeates to the lower clean water collection area. A water recovery interface and a mixed water discharge interface are fixedly connected to the end of the connecting pipe. The water recovery interface is connected to the lower clean water collection area of ​​the filter membrane, and the mixed water discharge interface is connected to the upper dust-laden water flow channel of the filter membrane.

[0009] Furthermore, the surface of the spiral blades of the inner spiral cylinder is provided with a hydrophobic microstructure layer, which includes an array of micro-protrusions uniformly distributed along the surface of the spiral blades. The height of the micro-protrusions is 0.1mm-0.5mm, the spacing between adjacent micro-protrusions is 0.3mm-1mm, and the top of the micro-protrusions is spherical.

[0010] Furthermore, the inner wall of the snap-fit ​​groove of the snap-fit ​​cylinder is provided with an elastic pressure plate along the axial direction. The elastic pressure plate is an arc-shaped spring steel plate. The convex surface of the elastic pressure plate faces the bottom of the snap-fit ​​groove. The outer surface of the elastic pressure plate is provided with hemispherical protrusions arranged at intervals along the axial direction. When the curtain body is snapped into the snap-fit ​​groove, the elastic pressure plate is compressed and undergoes elastic deformation. The hemispherical protrusions are embedded in the surface of the curtain body to form multi-point pressure.

[0011] Furthermore, the end of the inner spiral cylinder passes through the end of the connecting pipe and extends outward. A rotary joint is fitted around the outer circumference of the extended end of the inner spiral cylinder. The inner ring of the rotary joint is fixedly connected to the extended end of the inner spiral cylinder, and the outer ring of the rotary joint is fixedly connected to one end of the air guide pipe. The other end of the air guide pipe is connected to the air inlet of the screw air compressor inside the equipment room. The exhaust end of the screw air compressor is connected to the air inlet of the mist nozzle through the air supply pipeline. When the inner spiral cylinder rotates, the centrifugal force generated by the spiral blades throws the moisture in the dust-laden airflow toward the inner wall of the connecting pipe. The airflow enters the air guide pipe through the rotary joint along the axial direction of the inner spiral cylinder. The screw air compressor draws in the airflow, compresses it, and delivers it to the mist nozzle as an atomizing air source. A pressure regulating valve is provided on the air guide pipe, and a gas-liquid separator is provided on the air supply pipeline. The drain port of the gas-liquid separator is connected to the water recovery interface through the return pipe.

[0012] Furthermore, a sedimentation zone is located at the bottom of the water tank, below the filter membrane. This sedimentation zone is connected to the clear water collection zone. The bottom surface of the sedimentation zone slopes axially at one end, with a sludge discharge port at the lower end of the slope. A sludge discharge valve is installed on the sludge discharge port. An overflow baffle is located above the sedimentation zone, with its height lower than the side wall of the water tank. The overflow baffle separates the sedimentation zone from the water intake of the water recovery interface. After the dust-laden airflow enters the connecting pipe, the centrifugal force generated by the rotation of the inner spiral drum throws the dust-laden water droplets towards the inner wall of the connecting pipe and along the inner... The dust-laden water flows into the channel above the water tank. After the dust-laden water is filtered by the filter membrane, the dust is trapped on the surface of the filter membrane. The clean water permeates to the lower clean water collection area and flows into the sedimentation area. The clean water is further settled in the sedimentation area and then overflows through the overflow baffle to the water recovery interface. From the water recovery interface, it is transported to the water spray component for recycling through the return water pipeline. The dust trapped on the surface of the filter membrane is discharged with the dust-laden water through the mixed water discharge interface. The sludge at the bottom of the sedimentation area slides along the inclined bottom surface to the sludge discharge port and is periodically discharged through the sludge discharge valve.

[0013] Furthermore, a counterweight strip is fixedly connected to the bottom edge of the curtain body.

[0014] A mobile intelligent dust suppression control system for a material yard is applied to a mobile intelligent dust suppression device for a material yard, including a position detection module, a zone control module and a timing module; The position detection module consists of a fixed shaft, a curtain body, a rotating ring, and a detection circuit composed of an inner metal arc sheet and an outer metal arc sheet. When the fabric trolley passes the curtain, it pushes the curtain body to rotate around the fixed shaft. The curtain body drives the rotating ring to rotate through the limiting groove, causing the outer metal arc sheet to rotate to a state of partial overlap with the inner metal arc sheet, and the detection circuit is activated. After the fabric trolley leaves, the curtain body rotates back to its original position under the action of gravity, and the outer metal arc sheet and the inner metal arc sheet are separated, and the detection circuit is disconnected. The timing module has a built-in timing unit and storage unit. When the detection circuit changes from the open state to the closed state for the first time, the timing module records the entry time of the fabric trolley and starts the fog nozzles in that area. When the detection circuit changes from the closed state to the open state, the timing module records the departure time of the fabric trolley. The timing module calculates the dwell time of the fabric trolley in the curtain area based on the entry and departure times and stores it in the storage unit. The timing module dynamically sets the delay closing time based on the dwell time. The longer the dwell time, the longer the delay closing time. The fog nozzles in that area are turned off after the delay closing time is reached, starting from the departure time of the fabric trolley. The zone control module divides the fabric section into passed, passing, and unreached areas based on the signals from the position detection module. The zone control module controls the fog nozzles in the passing area to be fully open. The zone control module controls the fog nozzles in the passed area to remain open for the delayed closing time until the timer module finishes timing and closes. The zone control module controls the fog nozzles in the unreached area to be closed. The timer module also stores the historical dwell time of the fabric trolley when passing adjacent curtains. The zone control module predicts the estimated time when the fabric trolley will arrive at the next curtain based on the historical dwell time and pre-opens the fog nozzles of the next area before the estimated time.

[0015] The present invention has the following beneficial effects: 1. This invention, through the linkage between the curtain body and the rotating ring, enables the outer and inner metal arc-shaped sheets to partially overlap and conduct a detection circuit, realizing the mechanical-electrical conversion of the fabric carriage position. Position signals can be obtained without external power supply sensors. At the same time, the three-dimensional arrangement of mist nozzles at the top and sides of the fabric section allows the mist droplets to wrap around the fabric section from three directions, achieving the effect of no dead angles in mist droplet coverage and reducing the amount of water mist escaping. Meanwhile, the negative pressure component moves with the fabric carriage, forming a local negative pressure zone near the fabric point, which promptly sucks in and recovers the escaped water mist and dust, preventing the water mist from spreading to other areas of the material shed, and achieving the effects of reduced negative pressure energy consumption and directional water mist recovery.

[0016] 2. The present invention uses the matching arrangement of the limiting ring and the annular stepped groove to make the end face of the limiting ring contact the stepped surface of the annular stepped groove to limit axial displacement. During the frequent reciprocating rotation of the curtain body, the rotating ring will not move axially due to vibration or impact, thus achieving the effect of stable contact of the detection circuit and avoiding signal loss due to axial displacement. At the same time, it avoids the situation of axial separation between the inner metal arc sheet and the outer metal arc sheet.

[0017] 3. This invention utilizes an asymmetrical structure with a larger gap at the left end than at the right end, allowing the outer metal arc-shaped sheet to contact the inner metal arc-shaped sheet and activate the detection circuit with only a small rotation angle. When the fabric trolley passes the same curtain in the backward direction, the detection circuit remains disconnected due to the smaller gap at the right end and the limited actual rotation angle. This achieves the effect of automatically distinguishing the direction of the fabric trolley's movement and avoiding accidental triggering of the fog nozzles during backward movement, thereby reducing unnecessary spraying during the reverse idle stroke and further reducing water and air consumption.

[0018] 4. This invention utilizes the following motion of an electromagnet and a sliding rod to allow the dust collection hood to slide along the sliding rod towards the fabric trolley. The folding plate unfolds to form a sealed air duct, while the two sliding rods support the folding plate to prevent it from collapsing inward. This ensures that the dust collection hood operates only near the fabric trolley, directionally drawing in the escaping water mist and dust before they diffuse, achieving precise negative pressure guidance and reducing the ineffective suction area. Simultaneously, the series connection of centrifugal separation in the inner spiral cylinder and filtration in the filter membrane causes water droplets in the dust-laden water mist to be thrown against the inner wall of the connecting pipe. After separation by the water tank and filter membrane, the clean water is recovered, and the concentrated dust-laden water is discharged, achieving three-phase separation of water, air, and dust in the dust-laden water mist. The recovered clean water is then resupplyed to the dry fog dust suppression spray ring or the fogging component for recycling, achieving the effects of water resource recycling and reducing the amount of wastewater discharged.

[0019] 5. The present invention uses a hydrophobic microstructure layer formed by a micro-protrusion array to ensure that water droplets only make point contact with the spherical top of the micro-protrusions, increasing the contact angle. Under the action of centrifugal force and gravity, the water droplets roll off the blade surface without spreading into a water film, reducing the adhesion between the water droplets and the blade surface. This achieves the effects of rapid detachment of water droplets from the blade surface, reduced rotational resistance of the inner spiral cylinder, and improved centrifugal separation efficiency. In turn, it enhances the negative pressure component's ability to recover and process dust-laden water mist, and avoids the reduction in separation efficiency caused by water film accumulation.

[0020] 6. This invention utilizes a multi-point pressing mechanism with an arc-shaped spring steel plate and hemispherical protrusions. When the top edge of the curtain body is inserted into the snap-fit ​​groove, the elastic pressure plate is compressed, and the hemispherical protrusions embed into the surface of the curtain body, forming local depressions that firmly fix the curtain body. When disassembly is required, the curtain body is pulled out axially, and the elastic pressure plate springs back to its original position, ensuring a uniform distribution of the fixing force on the curtain body. This avoids local stress concentration that could lead to curtain tearing, while also facilitating disassembly and replacement. It ensures that the curtain body maintains good sealing and shielding performance even after long-term use, thereby reducing the escape of water mist from the gap between the curtain and the fixing shaft.

[0021] 7. This invention utilizes a rotary joint to direct the airflow separated from the inner spiral cylinder to the inlet of a screw-type air compressor, creating a low-pressure zone inside the hollow central shaft. The airflow enters the screw-type air compressor via the rotary joint and air guide pipe, and after compression, is sent to the mist nozzle as an atomizing air source. This achieves gas recycling, reducing the intake of external dust-laden gas and lowering the maintenance frequency of the intake filter. Simultaneously, the gas-liquid separator and return pipe further remove water from the compressed gas and return the separated water to the water recovery interface, further recovering residual moisture. This improves the atomization quality of the mist nozzle and achieves tiered water resource recovery. Furthermore, this airflow recycling allows the negative pressure component to provide a clean air source for the mist component while recovering water mist, forming a closed-loop airflow within the dust suppression system and preventing the direct discharge of humid gas into the atmosphere, thus avoiding secondary pollution.

[0022] 8. This invention, through the setting of a sedimentation zone and an overflow baffle, allows clean water to first flow into the sedimentation chamber, reducing the water flow velocity. Suspended sediment settles on the inclined bottom surface under gravity. After the clean water rises above the upper edge of the overflow baffle, it overflows into the water suction chamber and is drawn out by the water recovery interface. Secondary gravity sedimentation occurs before the clean water enters the recovery interface, achieving the effect of reducing the solid content in the recovered water and preventing the fogging nozzles from clogging. At the same time, the inclined bottom surface and sludge discharge port allow the deposited sediment to automatically slide along the inclined bottom surface to the sludge discharge port, and the sludge discharge valve is opened periodically to discharge it, achieving the effect of improving sludge discharge efficiency. In addition, the sedimentation zone further enhances the purification capacity of the negative pressure component for the recovered water, ensuring that the recycled clean water will not affect the spraying effect due to the accumulation of impurities, thereby extending the continuous operation time of the entire dust suppression system.

[0023] 9. This invention, through the setting of counterweight strips, allows the curtain body to rotate downwards and reset around a fixed axis under the gravity of the counterweight strips, while maintaining a vertically hanging state covering the transverse section of the fabric section. This provides the curtain body with a reset driving force that does not require external energy, achieving the effects of reducing curtain swaying, maintaining water mist sealing, and reducing failure rate in windy outdoor environments. At the same time, the counterweight strips form a reliable mechanical seal between the curtain body and both sides of the fabric section, reducing the outward escape of water mist from the gap between the bottom of the curtain and the ground, and improving the working efficiency of the negative pressure component.

[0024] 10. This invention, through the linkage of the curtain's own detection circuit with the timing module and the zone control module, records the entry time and activates the fogging nozzles in the corresponding area when the detection circuit is on, and records the departure time and calculates a dynamic delay based on the dwell time when the circuit is off. The zone control module divides the fabric section into three zones: passed, passing, and not yet arrived, and executes control logic for closing, fully opening, and delayed closing respectively. This achieves zoned on-demand spraying without the need for external position sensors, reducing water and air consumption from ineffective spraying. Simultaneously, by setting a dynamic delay based on dwell time, the delayed closing time is positively correlated with the dwell time, avoiding insufficient spraying or resource waste caused by fixed delays. Furthermore, through… By using historical dwell time prediction and pre-activation settings, the zone control module can predict the estimated time when the fabric trolley will arrive at the next curtain based on historical dwell time, and pre-activate the fog nozzles in the next area in advance. This eliminates the dust suppression blind spots caused by activation delays and achieves the effect of complete spray coverage before the fabric trolley arrives. At the same time, through the coordinated operation of zone control and negative pressure components, fog is activated only in the areas that the fabric trolley is passing through and has just passed through. Meanwhile, the negative pressure components follow the movement of the trolley to recover water mist in the area, achieving a precise match between dust suppression and recovery. This ensures the dust suppression effect while minimizing the consumption of water, electricity, and gas. At the same time, the recovered clean water and airflow are reused in the system, forming an energy-saving and environmentally friendly closed loop.

[0025] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall invention.

[0027] Figure 2 This is an isometric view of the negative pressure component of the present invention.

[0028] Figure 3 This is a cross-sectional view of the negative pressure component of the present invention.

[0029] Figure 4 This is an axonometric view of the curtain of the present invention.

[0030] Figure 5 This is a cross-sectional view of the inner metal arc sheet and the outer metal arc sheet of the present invention.

[0031] Figure 6 This is an isometric view of the rotating ring of the present invention.

[0032] In the diagram: 1. Fabric trolley; 2. Slide rail support column; 3. Dry fog water vapor pipe; 4. Dry fog nozzle; 5. Sky fog pipe; 6. Sky fog nozzle; 7. Power distribution room; 8. Equipment room; 9. Dry fog dust suppression spray ring; 10. Fabric section; 11. Curtain; 11. Fixed shaft; 111. Inner metal arc plate; 1111. Rotating ring; 112. Outer metal arc plate; 1121. Step groove; 1122. Limiting groove; 1123. End cap; 113. Clip-on cylinder; 114. Negative pressure component; 12. Connecting pipe; 121. Folding plate; 122. Dust suction hood; 123. Electromagnet; 124. Slide rod; 125. Inner spiral cylinder; 126. PTFE membrane; 127. Filter membrane; 128. Water recovery interface; 129. Mixed water discharge interface; 130. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 6This invention provides a technical solution: a mobile intelligent dust suppression device for material yards, comprising a material distribution trolley 1, an equipment room 8, and a material distribution section 10. The material distribution trolley 1 forms the material distribution section 10 during operation, and a material distribution opening is located at the end of the material distribution section 10. The device includes: a fogging assembly, with several sets arranged along both sides of the material distribution section 10; the fogging assembly includes fogging nozzles 6, with multiple fogging nozzles 6 spaced apart; some fogging nozzles 6 are located at the top of the material distribution section, and others are located on both sides of the material distribution section 10; the fog droplets generated by the fogging nozzles 6 cover the material distribution section 10; and a dry fog dust suppression spray ring 9, distributed at the material distribution opening. To form a dense fog curtain when materials fall, several curtains 11 are evenly distributed along the working direction of the fabric trolley 1 on the fabric section 10. A negative pressure component 12 that moves with the fabric trolley 1 is provided next to the fabric section 10. The curtain 11 includes a curtain body and a fixed shaft 111. The top of the curtain body is rotatably connected to the fixed shaft 111. A snap-fit ​​cylinder 114 is also sleeved around the curtain body. The outer wall of the snap-fit ​​cylinder 114 has a snap-fit ​​groove along the axial direction for snapping the curtain body. Both ends of the fixed shaft 111 are rotatably connected to a rotating ring 112. Both ends of the fixed shaft 111 are threadedly connected to an end cap 113. The bottom of the inner wall of the rotating ring 112 is provided with an arc-shaped outer metal layer. The outer wall of the fixed shaft 111 has an inner metal arc plate 1111 that is offset from the outer metal arc plate 1121. The bottom of the inner end face of the rotating ring 112 has a limiting groove 1123 that engages with the curtain body. The fabric trolley 1 is slidably connected to the slide rail support column 2 and reciprocates along the fabric section 10. The fog nozzle 6 is fixedly connected to the top and sides of the fabric section 10 through the fog pipe 5. The fog pipe 5 is connected to the micron-level dry fog machine inside the equipment room 8 through a water vapor distributor. The top edge of the curtain body is inserted into the snap-fit ​​groove of the snap-fit ​​tube 114 to form a snap-fit ​​fixation. The snap-fit ​​tube 114 is connected to the curtain body through its inner wall. Friction maintains the connection; the two ends of the fixed shaft 111 are connected to end caps 113 by threads, and the rotating ring 112 is sleeved on both ends of the fixed shaft 111 to form a clearance fit rotational connection; the outer metal arc-shaped piece 1121 is fixedly connected to the bottom of the inner wall of the rotating ring 112 by welding, and the inner metal arc-shaped piece 1111 is fixedly connected to the top of the outer wall of the fixed shaft 111 by welding; the limiting groove 1123 is a groove opened at the bottom of the inner end face of the rotating ring 112, and the side of the curtain body is embedded in the limiting groove 1123 to form a snap-fit ​​limiting; the periphery of the fabric section 10 forms a closed channel that runs through both ends, that is, an inverted U-shaped closed channel, and the fog nozzles 6 are set at the top and both sides of the closed channel.

[0035] In practical implementation, when the fabric trolley 1 travels along the fabric section 10, it pushes the curtain body to rotate around the fixed axis 111. The curtain body, through the limiting groove 1123, drives the rotating ring 112 to rotate synchronously, causing the outer metal arc sheet 1121 and the inner metal arc sheet 1111 to partially overlap, thereby connecting the detection circuit. At the same time, the magnet on the fabric trolley 1 magnetically engages with the electromagnet 124 of the negative pressure component 12, causing the dust collection hood 123 to move accordingly. Through the linkage between the curtain body and the rotating ring 112, the mechanical to electrical conversion of the position of the fabric trolley 1 is achieved, and the position signal can be obtained without the need for an external power supply sensor. By arranging the mist nozzles 6 three-dimensionally at the top and sides of the fabric section 10, the mist droplets wrap around the fabric section 10 from three directions, achieving the effect of no dead angles in mist droplet coverage and reduced water mist leakage. By having the negative pressure component 12 follow the movement of the material feeding trolley 1, a local negative pressure zone is formed near the material feeding point, which promptly sucks in and recovers the escaped water mist and dust, preventing the water mist from spreading to other areas of the material shed. This achieves the effects of reduced negative pressure energy consumption and directional water mist recovery.

[0036] Another embodiment, refer to Figure 5 and Figure 6 The inner wall of the rotating ring 112 is provided with an annular stepped groove 1122. Both ends of the fixed shaft 111 are fixedly connected with limiting rings that are limited by the annular stepped groove 1122. The limiting rings are fixedly connected to both ends of the fixed shaft 111 by interference fit. The annular stepped groove 1122 is a stepped annular groove opened on the inner wall of the rotating ring 112. The outer diameter of the limiting ring is larger than the inner diameter at the opening of the annular stepped groove 1122. The rotating ring 112 is sleeved on the outside of the limiting ring through the annular stepped groove 1122 and forms an axial limiting fit. The rotating ring 112 can rotate freely around the fixed shaft 111 but cannot be pushed forward axially, which can keep the curtain body from being compressed.

[0037] In practical implementation, when the fabric trolley 1 pushes the curtain body to rotate, the rotating ring 112 rotates with the curtain body, and the annular stepped groove 1122 rotates relative to the limiting ring. The end face of the limiting ring contacts the stepped surface of the annular stepped groove 1122 to limit axial displacement. Through the cooperation between the limiting ring and the annular stepped groove 1122, the rotating ring 112 will not move axially due to vibration or impact during the frequent reciprocating rotation of the curtain body. This achieves stable contact in the detection circuit, avoids signal loss due to axial displacement, and prevents axial separation between the inner metal arc plate 1111 and the outer metal arc plate 1121.

[0038] Another embodiment, refer to Figure 5The gap between the left ends of the inner metal arc-shaped piece 1111 and the outer metal arc-shaped piece 1121 is greater than the gap between their right ends, and the difference in gap is at least twice. A groove is first made on the outer wall of the fixed shaft 111, and then the inner metal arc-shaped piece 1111 is glued and fixedly connected within the groove. A groove is also made at the bottom of the inner wall of the rotating ring 112, and then the outer metal arc-shaped piece 1121 is glued and fixedly connected within the groove. The arc lengths of the two arc-shaped pieces are not equal; the arc length of the inner metal arc-shaped piece 1111 is less than the arc length of the outer metal arc-shaped piece 1121, and the gap at the left end is more than twice the gap at the right end.

[0039] In practical implementation, when the fabric trolley 1 passes the curtain 11 along the forward direction (from left to right) and pushes the curtain body to rotate, the outer metal arc plate 1121 rotates from the right end to the left end (counterclockwise) with the rotating ring 112. Since the gap at the left end is larger, the outer metal arc plate 1121 only needs to rotate a small angle (e.g., 5°-10°) to make the left end contact the inner metal arc plate 1111, and the detection circuit is turned on. When the fabric trolley 1 passes the same curtain 11 in the backward direction (from right to left), the fabric trolley 1 pushes the curtain body to rotate in the opposite direction. At this time, the outer metal arc plate 1121 moves from the left end to the right end (clockwise). Due to the smaller gap at the right end (less than 1 / 2 of the gap at the left end), the outer metal arc plate 1121 needs to rotate a large angle (e.g., 20°-30°) to make the right end contact the inner metal arc plate 1111. However, the actual rotation angle of the curtain body when the fabric trolley 1 passes is limited by the width of the fabric trolley 1 and the swing space of the curtain body, and cannot reach this large angle. Therefore, the detection circuit remains disconnected. By setting an asymmetrical structure with a larger gap at the left end than at the right end, the curtain body triggers the detection signal only when the fabric trolley 1 moves forward and not when it moves backward. This achieves the effect of automatically distinguishing the walking direction of the fabric trolley 1 and avoiding accidental triggering of the fog nozzle 6 when moving backward, thereby reducing unnecessary spraying during the reverse idle stroke and further reducing water and air consumption.

[0040] Another embodiment, refer to Figure 2 and Figure 3The negative pressure assembly 12 includes: a connecting pipe 121, a rectangular slot on the side of the connecting pipe 121 near the fabric cart 1, two folding plates 122 on the inner wall of the rectangular slot, the folding plates 122 being corrugated plates foldable along their length, one end of the folding plates 122 being fixedly connected to the rectangular slot, and the other end being fixedly connected to the outer wall of the dust collection hood 123, two parallel sliding rods 125 being fixedly connected inside the rectangular slot, the dust collection hood 123 being slidably connected to the two sliding rods 125, the outer wall of the dust collection hood 123 being fixedly connected to the end of the folding plates 122, at least one electromagnet 124 being fixedly connected to the side of the dust collection hood 123 near the fabric cart 1, a magnet being magnetically attracted to the electromagnet 124 on the fabric cart 1, and an inner spiral cylinder 126 being coaxially rotatably connected inside the connecting pipe 121. The rotary cylinder 126 includes a central shaft and spiral blades fixedly connected to the outer periphery of the central shaft. The central shaft is a hollow shaft and its outer wall is covered with a PTFE membrane 127. The spiral blades are located on the outside of the PTFE membrane 127. A water tank is recessed at the bottom inside the connecting pipe 121. An arc-shaped filter membrane 128 is fixedly connected to the middle of the water tank. The filter membrane 128 divides the water tank into an upper dust-laden water flow channel and a lower clean water collection area. After the dust-laden water flows through the filter membrane 128, the dust is trapped on the surface of the filter membrane 128, and the clean water permeates to the lower clean water collection area. A water recovery interface 129 and a mixed water discharge interface 130 are fixedly connected to the end of the connecting pipe 121. The water recovery interface 129 is connected to the lower clean water collection area of ​​the filter membrane 128, and the mixed water discharge interface 130 is connected to the upper dust-laden water flow channel of the filter membrane 128. The connecting pipe 121 is bolted to the side ground of the fabric section 10 or to the slide rail support column 2, with the rectangular slot facing the fabric trolley 1; the two ends of the folding plate 122 are respectively fixed to the inner wall of the rectangular slot and the outer wall of the dust collection hood 123 by rivets; the folding plate 122 is obtained by cutting the outer wall of the retractable corrugated pipe axially and then unfolding it, referencing the structure of a retractable corrugated pipe; the two ends of the slide rod 125 are threaded to the inner walls of the two ends of the rectangular slot; the dust collection hood 123 has a guide hole that fits with the slide rod 125 with clearance; the dust collection hood 123 is fitted onto the slide rod 125 to form a sliding connection; the electromagnet 124 is fixed by screws. A permanent magnet is fixed to the corresponding position on the fabric trolley 1 by screws on the side of the dust collection hood 123 facing the fabric trolley 1; the two ends of the central shaft of the inner spiral cylinder 126 are rotatably connected to the inner wall of the connecting pipe 121 by bearings, the spiral blades are welded and fixed to the central shaft, and the PTFE membrane 127 is bonded to the outer wall of the central shaft; the filter membrane 128 is fixedly connected to the middle of the water tank by a slot and a pressure strip; the water recovery interface 129 and the mixed water discharge interface 130 are both threaded to the end of the connecting pipe 121, the inner end of the water recovery interface 129 is connected to the lower clean water collection area through a hose, and the inner end of the mixed water discharge interface 130 is connected to the upper dust-laden water flow channel.

[0041] In practical implementation, when the fabric trolley 1 passes by, the electromagnet 124 is energized and magnetically attracted to the permanent magnet on the fabric trolley 1, causing the dust hood 123 to slide along the slide bar 125 towards the fabric trolley 1. The folding plate 122 unfolds to form a sealed air duct, and the two slide bars 125 can support the folding plate 122 to prevent it from collapsing inward. After the dust-laden water mist is sucked into the connecting pipe 121, the airflow drives the inner spiral cylinder 126 to rotate. The centrifugal force generated by the spiral blades throws the water droplets against the inner wall of the connecting pipe 121. The water droplets flow into the water tank and are separated by the filter membrane 128. The clean water is recovered through the water recovery interface 129, and the dust-laden concentrated water is discharged through the mixed water discharge interface 130. By setting the electromagnet 124 and the slide bar 125 to follow the movement, the dust hood 123 works only near the fabric trolley 1, directionally sucking in the escaping water mist and dust before they diffuse, achieving the effect of precise negative pressure guidance and reducing the ineffective suction range. The series connection of centrifugal separation by the inner spiral cylinder 126 and filtration by the filter membrane 128 achieves three-phase separation of water, air, and dust in the dust-laden water mist. The recovered clean water is then resupplied to the dry fog dust suppression spray ring 9 or the fogging assembly for recycling, achieving the effects of water resource recycling and reduced wastewater discharge. The sealed air duct design of the folding plate 122 ensures a sealed air passage between the dust collection hood 123 and the connecting pipe 121, preventing negative pressure leakage, improving water mist recovery efficiency, and effectively preventing water mist from escaping to other areas of the material shed.

[0042] In another embodiment, the surface of the helical blades of the inner helical cylinder 126 is provided with a hydrophobic microstructure layer. The hydrophobic microstructure layer includes an array of micro-protrusions uniformly distributed along the surface of the helical blades. The height of the micro-protrusions is 0.1mm-0.5mm, the spacing between adjacent micro-protrusions is 0.3mm-1mm, and the top of the micro-protrusions is spherical. The micro-protrusion array is integrally formed with the helical blades by a precision injection molding process, and the geometric parameters of the micro-protrusions are ensured by the electrical discharge machining precision of the mold cavity.

[0043] In practical implementation, when dust-laden water droplets come into contact with the surface of the spiral blades, the droplets only make point contact with the micro-protruding spherical tops, increasing the contact angle. Under the action of centrifugal force and gravity, the droplets roll off the blade surface without spreading into a water film. The hydrophobic microstructure layer formed by the micro-protrusion array reduces the adhesion force between the water droplets and the blade surface, achieving the effects of rapid detachment of water droplets from the blade surface, reduced rotational resistance of the inner spiral cylinder 126, and improved centrifugal separation efficiency. This, in turn, enhances the negative pressure component 12's ability to recover and process dust-laden water mist, avoiding the reduction in separation efficiency caused by water film accumulation.

[0044] In another embodiment, the inner wall of the snap-fit ​​groove of the snap-fit ​​cylinder 114 is provided with an elastic pressure plate along the axial direction. The elastic pressure plate is an arc-shaped spring steel plate, with its convex surface facing the bottom of the snap-fit ​​groove. The outer surface of the elastic pressure plate is provided with hemispherical protrusions arranged at intervals along the axial direction. When the curtain body is snapped into the snap-fit ​​groove, the elastic pressure plate is compressed and undergoes elastic deformation, and the hemispherical protrusions are embedded in the surface of the curtain body to form multi-point pressing. The elastic pressure plate is made of 65Mn spring steel plate and is stamped into an arc shape. Its back side is fixedly connected to the inner wall of the snap-fit ​​groove by spot welding. The hemispherical protrusions and the elastic pressure plate are stamped together and arranged at intervals along the axial direction. When the top edge of the curtain body is inserted into the snap-fit ​​groove, the elastic pressure plate is squeezed and undergoes elastic deformation, and the hemispherical protrusions are pressed into the surface of the curtain body to form a multi-point pressing fit.

[0045] In practical implementation, when installing the curtain body, its top is aligned with the locking groove and pushed in. The elastic pressure plate is compressed, and the hemispherical protrusions embed into the surface of the curtain body, forming local depressions, thereby firmly fixing the curtain body. When disassembly is required, the curtain body is pulled out axially, and the elastic pressure plate springs back to its original position. Through the multi-point pressing setting of the arc-shaped spring steel plate and the hemispherical protrusions, the fixing force of the curtain body is evenly distributed, achieving the effect of avoiding curtain tearing caused by local stress concentration, while facilitating disassembly and replacement. This ensures that the curtain body can maintain good sealing and shielding performance even after long-term use, thereby reducing the escape of water mist from the gap between the curtain and the fixing shaft 111.

[0046] In another embodiment, the end of the inner spiral cylinder 126 passes through the end of the connecting pipe 121 and extends outward. A rotary joint is fitted around the outer periphery of the extended end of the inner spiral cylinder 126. The inner ring of the rotary joint is fixedly connected to the extended end of the inner spiral cylinder 126, and the outer ring of the rotary joint is fixedly connected to one end of the air guide pipe. The other end of the air guide pipe is connected to the air inlet of the screw air compressor inside the equipment room 8. The exhaust end of the screw air compressor is connected to the air inlet of the mist nozzle 6 through the air supply pipe. The spiral blades of the inner spiral cylinder 126 are driven to rotate by the negative pressure airflow. When the inner spiral cylinder 126 rotates, the centrifugal force generated by the spiral blades throws the moisture in the dust-laden airflow toward the inner wall of the connecting pipe 121. The airflow enters the air guide pipe through the rotary joint along the axial direction of the inner spiral cylinder 126. The screw air compressor draws in the airflow and compresses it before delivering it to the mist nozzle 6 as an atomizing air source. A pressure regulating valve is provided on the air guide pipe, and a gas-liquid separator is provided on the air supply pipe. The drain port of the gas-liquid separator is connected to the water recovery interface 129 through the return pipe. One end of the hollow central shaft of the inner spiral cylinder 126 passes through the sealed bearing at the end of the connecting pipe 121 and extends outward; the inner ring of the rotary joint is threaded onto the extended end to form a fixed connection, and the outer ring of the rotary joint is fixedly connected to one end of the air guide pipe through a flange; the other end of the air guide pipe is threaded to the air inlet of the screw air compressor; the exhaust end of the screw air compressor is connected to the air inlet of the mist nozzle 6 through the air supply pipeline, and a gas-liquid separator is connected in series on the air supply pipeline; the drain port of the gas-liquid separator is connected to the water recovery interface 129 through the return pipe; and the pressure regulating valve is threaded to the middle section of the air guide pipe.

[0047] In practical implementation, when the inner spiral cylinder 126 rotates, a low-pressure zone is formed inside the hollow central shaft. The airflow enters the screw air compressor through the rotary joint and air guide pipe. The compressed gas is sent to the mist nozzle 6 through the air supply pipeline. The gas-liquid separator removes water from the compressed gas a second time, and the separated water flows back to the water recovery interface 129 through the return pipe. By guiding the airflow separated by the inner spiral cylinder 126 to the air inlet of the screw air compressor through the rotary joint, gas recycling is achieved, which reduces the intake of external dust-laden gas and lowers the maintenance frequency of the air intake filter. Through the gas-liquid separator and return pipe, residual moisture in the compressed gas is further recovered, which improves the atomization quality of the mist nozzle 6 and achieves the effect of tiered water resource recovery. At the same time, the recycling of this airflow allows the negative pressure component 12 to provide a clean air source for the mist component while recovering water mist, forming a closed airflow loop inside the dust suppression system and avoiding the direct discharge of humid gas into the atmosphere, which would cause secondary pollution.

[0048] In another embodiment, a sedimentation zone is located at the bottom of the water tank below the filter membrane 128. The sedimentation zone is connected to the clear water collection zone. The bottom surface of the sedimentation zone is inclined at one end along the axial direction, and a sludge discharge port is provided at the lower end of the inclination. A sludge discharge valve is provided on the sludge discharge port. An overflow baffle is provided at the upper part of the sedimentation zone. The height of the overflow baffle is lower than the height of the side wall of the water tank. The overflow baffle separates the sedimentation zone from the water intake port of the water recovery interface 129. The sedimentation zone is a cavity formed by a downward indentation at the bottom of the water tank, which is connected to the clear water collection zone below the filter membrane 128 through an opening. The bottom surface of the sedimentation zone is inclined at an angle of 5°-10° with the horizontal plane. This angle is ensured by mechanical processing. A sludge discharge port is provided at the lower end of the inclination, and a sludge discharge valve is threaded onto the sludge discharge port. The overflow baffle is welded and fixed to the upper part of the sedimentation zone, and its upper edge is 30mm-50mm lower than the height of the side wall of the water tank. The water intake port of the water recovery interface 129 is located in the water intake cavity separated by the overflow baffle.

[0049] In practical implementation, after the clean water permeates to the lower clean water collection area, it first flows into the sedimentation chamber of the sedimentation zone. The water flow velocity decreases, and suspended sediment settles on the inclined bottom surface under gravity. The clean water gradually rises, and when the water level exceeds the upper edge of the overflow baffle, the clean water overflows into the suction chamber and is sucked out by the water recovery interface 129. The deposited sediment slides along the inclined bottom surface to the sludge discharge port, and is periodically discharged by opening the sludge discharge valve. Through the sedimentation zone and overflow baffle, secondary gravity sedimentation occurs before the clean water enters the water recovery interface 129, achieving the effect of reducing the solid content in the recovered water and preventing clogging of the mist nozzle 6. The inclined bottom surface and sludge discharge port allow the deposited sediment to automatically concentrate at the discharge port, improving sludge discharge efficiency. This sedimentation zone further enhances the purification capacity of the negative pressure component 12 for the recovered water, ensuring that the recycled clean water does not affect the spraying effect due to impurity accumulation, thereby extending the continuous operation time of the entire dust suppression system.

[0050] In another embodiment, a counterweight strip is fixedly connected to the bottom edge of the curtain body. The counterweight strip is made of rubber-coated lead strip and is fixedly connected to the inner side of the bottom edge of the curtain body by sewing or gluing.

[0051] In practical implementation, after the fabric trolley 1 leaves the curtain body, the curtain body rotates downward around the fixed axis 111 under the gravity of the counterweight, returning to its original position and maintaining a vertically hanging state to cover the transverse section of the fabric section 10. The counterweight provides the curtain body with a reset driving force that requires no external energy, achieving the effects of reducing curtain swaying, maintaining water mist sealing, and lowering the failure rate in windy outdoor environments. The counterweight creates a reliable mechanical seal between the curtain body and both sides of the fabric section 10, reducing the outward escape of water mist from the gap between the bottom of the curtain and the ground, and improving the working efficiency of the negative pressure component 12 (due to the reduced escape amount, the total amount of dust-laden water mist that the negative pressure component 12 needs to handle is reduced).

[0052] Another embodiment discloses a mobile intelligent dust suppression control system for a material yard, applied to a mobile intelligent dust suppression device for a material yard, comprising a position detection module, a zone control module, and a timing module. The two ends of the detection circuit of the position detection module are electrically connected to the input port of the timing module via wires; the output port of the timing module is electrically connected to the input port of the zone control module via signal lines; the output port of the zone control module is connected to the solenoid valves of each fogging nozzle 6 via relays to form control signals; the timing module's built-in timing unit uses a DS1302 real-time clock chip, and the storage unit uses an AT24C02 electrically erasable programmable read-only memory chip; the screw air compressor, micron-level dry fogger, and distribution box inside the equipment room 8 are electrically connected to the respective electrical components via cables.

[0053] The position detection module consists of a detection circuit composed of a fixed shaft 111, a curtain body, a rotating ring 112, an inner metal arc sheet 1111, and an outer metal arc sheet 1121. When the fabric trolley 1 passes the curtain 11, the fabric trolley 1 pushes the curtain body to rotate around the fixed shaft 111. The curtain body drives the rotating ring 112 to rotate through the limiting groove 1123, causing the outer metal arc sheet 1121 to rotate to a state of partial overlap with the inner metal arc sheet 1111, and the detection circuit is turned on. After the fabric trolley 1 leaves, the curtain body rotates back to its original position under the action of gravity, and the outer metal arc sheet 1121 and the inner metal arc sheet 1111 are separated from each other, and the detection circuit is turned off.

[0054] The timing module has a built-in timing unit and a storage unit. When the detection circuit changes from the open state to the closed state for the first time, the timing module records the entry time of the fabric trolley 1 and starts the fog nozzle 6 in that area. When the detection circuit changes from the closed state to the open state, the timing module records the departure time of the fabric trolley 1. The timing module calculates the dwell time of the fabric trolley 1 in the curtain 11 area based on the entry and departure times and stores it in the storage unit. The timing module dynamically sets the delay closing time according to the length of the dwell time. The longer the dwell time, the longer the delay closing time. The fog nozzle 6 in that area is turned off after the delay closing time is reached, starting from the departure time of the fabric trolley 1.

[0055] The partition control module divides the fabric section 10 into a passed area, a passing area, and an unreached area based on the signal from the position detection module. The partition control module controls the fog nozzles 6 in the passing area to be fully open. The partition control module controls the fog nozzles 6 in the passed area to remain open during the delayed closing time until the timing module finishes timing and closes. The partition control module controls the fog nozzles 6 in the unreached area to be closed. The timing module also stores the historical dwell time of the fabric trolley 1 when passing adjacent curtains 11. The partition control module predicts the estimated time when the fabric trolley 1 will arrive at the next curtain 11 based on the historical dwell time and pre-opens the fog nozzles 6 in the next area before the estimated time.

[0056] In practical implementation, when the fabric trolley 1 passes through the curtain 11, the detection circuit is activated, the timing module records the entry time and opens the fog nozzles 6 in that area; after the fabric trolley 1 leaves, the detection circuit is deactivated, the timing module records the departure time and calculates a dynamic delay based on the dwell time (the dwell time value is multiplied by 0.3, for example, a 10-second dwell time results in a 3-second delay); the zoning control module divides the fabric section 10 into three zones, controlling the fog nozzles 6 in the zone being passed to be fully open, the zone already passed to remain open during the delay period, and the zone not yet reached to remain closed; simultaneously, the zoning control module predicts the arrival time of the next curtain 11 based on historical dwell times (the arithmetic mean of the last 5 passes) and pre-opens the fog nozzles 6 in that zone 5 seconds in advance. Through the linkage between the curtain 11's own detection circuit and the timing module and zoning control module, zoned on-demand spraying without external position sensors is achieved, reducing the water and air consumption of ineffective spraying. The dynamic delay setting based on dwell time avoids insufficient spraying or resource waste caused by fixed delays. By predicting and pre-activating based on historical residence time, the dust suppression blind spot caused by the delayed activation of the mist nozzle 6 was eliminated, achieving the effect of complete spray coverage before the fabric trolley 1 arrives. Through the coordinated operation of zone control and negative pressure component 12 (activating the mist only in the areas that the fabric trolley 1 is passing through and has just passed through, while the negative pressure component 12 follows the movement of the trolley to recover water mist in that area), precise matching of dust suppression and recovery was achieved. This ensured the dust suppression effect while minimizing the consumption of water, electricity, and gas. At the same time, the recovered clean water and airflow were reused within the system, forming an energy-saving and environmentally friendly closed loop.

[0057] In another embodiment, when the curtain body needs to be installed, firstly, the top of the curtain body is suspended on the fixed shaft 111, then the drooping edge of the curtain body is aligned with the snap-fit ​​groove opening of the snap-fit ​​cylinder 114, and the curtain body is pushed into the snap-fit ​​groove along the axial direction; during the pushing process, the edge of the curtain body squeezes the elastic pressure plate to make it elastically deformed, and the hemispherical protrusions press into the surface of the curtain body to form a multi-point pressing fit; then, the side of the curtain body is embedded into the limiting groove 1123 at the bottom of the inner end face of the rotating ring 112, and finally the end cap 113 is screwed onto both ends of the fixed shaft 111 to complete the installation and fixing of the curtain body.

Claims

1. A mobile intelligent dust suppression device for a material yard, comprising a material distribution trolley (1), an equipment room (8), and a material distribution section (10), wherein the material distribution trolley (1) forms a material distribution section (10) during operation, and a material distribution port is present at the end of the material distribution section (10), the device comprising: The fogging assembly has several sets distributed along both sides of the fabric section (10). The fogging assembly includes fogging nozzles (6), which are spaced out. Some fogging nozzles (6) are respectively located at the top of the fabric section, and others are respectively located on both sides of the fabric section (10). The fog droplets generated by the fogging nozzles (6) cover the fabric section (10). The water spray assembly is distributed at the fabric inlet to form a dense fog curtain when the material falls. The feature is that several curtains (11) are evenly distributed along the working direction of the fabric trolley (1) on the fabric section (10). A negative pressure assembly (12) that moves with the fabric trolley (1) is provided next to the fabric section (10). The curtain (11) includes a curtain body and a fixed shaft (111). The top of the curtain body is rotatably connected to the fixed shaft (111). The outer periphery of the curtain body is also fitted with a snap-fit ​​cylinder (114). The outer wall of the snap-fit ​​cylinder (114) is provided with a snap-fit ​​groove for snapping the curtain body along the axial direction. Both ends of the fixed shaft (111) are connected to a rotating ring (112) for limiting rotation. Both ends of the fixed shaft (111) are connected to an end cap (113) by thread. The bottom of the inner wall of the rotating ring (112) is provided with an arc-shaped outer metal arc piece (1121). The top of the outer wall of the fixed shaft (111) is provided with an inner metal arc piece (1111) that is offset from the outer metal arc piece (1121). The bottom of the inner end face of the rotating ring (112) is provided with a limiting groove (1123) for snapping with the curtain body.

2. The mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: The inner wall of the rotating ring (112) is provided with an annular stepped groove (1122), and both ends of the fixed shaft (111) are fixedly connected with limiting rings that are limited by the annular stepped groove (1122).

3. The mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: The gap between the left end of the inner metal arc sheet (1111) and the outer metal arc sheet (1121) is greater than the gap between the right ends, and the gaps differ by at least twice.

4. The mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: The negative pressure component (12) includes: a connecting pipe (121), a rectangular slot is provided on the side of the connecting pipe (1) near the fabric cart (1), two folding plates (122) are provided on the inner wall of the rectangular slot, the folding plates (122) are corrugated plates that can be folded along the length direction, one end of the folding plate (122) is fixedly connected to the rectangular slot, and the other end is fixedly connected to the outer wall of the dust collection hood (123), two parallel sliding rods (125) are fixedly connected inside the rectangular slot, the dust collection hood (123) is slidably connected on the two sliding rods (125), the outer wall of the dust collection hood (123) is fixedly connected to the end of the folding plate (122), at least one electromagnet (124) is fixedly connected on the side of the dust collection hood (123) near the fabric cart (1), the fabric cart (1) is provided with a magnet that is magnetically connected to the electromagnet (124), and an inner spiral cylinder (126) is coaxially rotatably connected inside the connecting pipe (121). The inner spiral cylinder (126) includes a central shaft and spiral blades fixedly connected to the outer periphery of the central shaft. The central shaft is a hollow shaft and its outer wall is covered with a PTFE membrane (127). The spiral blades are located on the outside of the PTFE membrane (127). The bottom of the connecting pipe (121) is recessed and a water tank is provided. An arc-shaped filter membrane (128) is fixedly connected to the middle of the water tank. The filter membrane (128) divides the water tank into an upper dust-laden water flow channel and a lower clean water collection area. After the dust-laden water flows through the filter membrane (128), the dust is trapped on the surface of the filter membrane (128), and the clean water permeates to the lower clean water collection area. The end of the connecting pipe (121) is fixedly connected to a water recovery interface (129) and a mixed water discharge interface (130). The water recovery interface (129) is connected to the lower clean water collection area of ​​the filter membrane (128), and the mixed water discharge interface (130) is connected to the upper dust-laden water flow channel of the filter membrane (128).

5. A mobile intelligent dust suppression device for material yards according to claim 4, characterized in that: The inner spiral tube (126) has a hydrophobic microstructure layer on the surface of its spiral blades. The hydrophobic microstructure layer includes an array of micro-protrusions evenly distributed along the surface of the spiral blades. The height of the micro-protrusions is 0.1 mm to 0.5 mm, the spacing between adjacent micro-protrusions is 0.3 mm to 1 mm, and the top of the micro-protrusions is spherical.

6. The mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: The inner wall of the snap-fit ​​groove of the snap-fit ​​cylinder (114) is provided with an elastic pressure plate along the axial direction. The elastic pressure plate is an arc-shaped spring steel plate. The convex surface of the elastic pressure plate faces the bottom of the snap-fit ​​groove. The outer surface of the elastic pressure plate is provided with hemispherical protrusions arranged at intervals along the axial direction. When the curtain body is snapped into the snap-fit ​​groove, the elastic pressure plate is pressed and generates elastic deformation. The hemispherical protrusions are embedded in the surface of the curtain body to form multi-point pressing.

7. A mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: The end of the inner spiral cylinder (126) passes through the end of the connecting pipe (121) and extends outward. A rotary joint is fitted around the outer periphery of the extended end of the inner spiral cylinder (126). The inner ring of the rotary joint is fixedly connected to the extended end of the inner spiral cylinder (126). The outer ring of the rotary joint is fixedly connected to one end of the air guide pipe. The other end of the air guide pipe is connected to the air inlet of the screw air compressor inside the equipment room (8). The exhaust end of the screw air compressor is connected to the air inlet of the fog nozzle (6) through the air supply pipe. When the inner spiral cylinder (126) rotates, the centrifugal force generated by the spiral blades throws the water in the dust-laden airflow toward the inner wall of the connecting pipe (121). The airflow enters the air guide pipe through the rotary joint along the axial direction of the inner spiral cylinder (126). The screw air compressor draws in the airflow and compresses it before delivering it to the fog nozzle (6) as an atomizing air source. A pressure regulating valve is provided on the air guide pipe. A gas-liquid separator is provided on the air supply pipe. The drain port of the gas-liquid separator is connected to the water recovery interface (129) through the return pipe.

8. A mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: The bottom of the water tank is located below the filter membrane (128) and has a sedimentation zone. The sedimentation zone is connected to the clear water collection zone. The bottom surface of the sedimentation zone is inclined at one end along the axial direction, and a sludge discharge port is provided at the lower end of the inclination. A sludge discharge valve that can be opened and closed is provided on the sludge discharge port. An overflow baffle is provided at the upper part of the sedimentation zone. The height of the overflow baffle is lower than the height of the side wall of the water tank. The overflow baffle separates the sedimentation zone from the water intake port of the water recovery interface (129). After the dust-laden airflow enters the connecting pipe (121), the centrifugal force generated by the rotation of the inner spiral cylinder (126) throws the dust-laden water droplets toward the inner wall of the connecting pipe (121) and flows into the water along the inner wall. The dust-laden water flow channel above the tank allows the dust-laden water to pass through the filter membrane (128). After the dust is filtered, it is trapped on the surface of the filter membrane (128). The clean water permeates to the lower clean water collection area and flows into the sedimentation area. After further sedimentation in the sedimentation area, the clean water overflows through the overflow baffle to the water recovery interface (129). The water recovery interface (129) is then transported to the water spray assembly for recycling through the return water pipeline. The dust trapped on the surface of the filter membrane (128) is discharged with the dust-laden water through the mixed water discharge interface (130). The silt at the bottom of the sedimentation area slides along the inclined bottom surface to the sludge discharge port and is periodically discharged through the sludge discharge valve.

9. A mobile intelligent dust suppression device for material yards according to claim 1, characterized in that: A counterweight strip is fixedly connected to the bottom edge of the curtain body.

10. A mobile intelligent dust suppression control system for a material yard, applied to the mobile intelligent dust suppression device for a material yard as described in any one of claims 1 to 9, characterized in that: It includes a position detection module, a partition control module, and a timing module; The position detection module consists of a detection circuit composed of a fixed shaft (111), a curtain body, a rotating ring (112), an inner metal arc sheet (1111), and an outer metal arc sheet (1121). When the fabric trolley (1) passes the curtain (11), the fabric trolley (1) pushes the curtain body to rotate around the fixed shaft (111). The curtain body drives the rotating ring (112) to rotate through the limiting groove (1123), causing the outer metal arc sheet (1121) to rotate to a state of partial overlap with the inner metal arc sheet (1111), and the detection circuit is connected. After the fabric trolley (1) leaves, the curtain body rotates back to its original position under the action of gravity, and the outer metal arc sheet (1121) and the inner metal arc sheet (1111) are separated from each other, and the detection circuit is disconnected. The timing module has a built-in timing unit and a storage unit. When the detection circuit changes from the disconnected state to the connected state for the first time, the timing module records the entry time of the fabric trolley (1) and starts the fog nozzle (6) in that area. When the detection circuit changes from the connected state to the disconnected state, the timing module records the departure time of the fabric trolley (1). The timing module calculates the dwell time of the fabric trolley (1) in the curtain (11) area based on the entry time and departure time and stores it in the storage unit. The timing module dynamically sets the delay closing time based on the length of the dwell time. The longer the dwell time, the longer the delay closing time. The fog nozzle (6) in that area is closed after the delay closing time is reached from the departure time of the fabric trolley (1). The partition control module divides the fabric section (10) into a passed area, a passing area, and an unreached area according to the signal from the position detection module. The partition control module controls the fog nozzles (6) in the passing area to be fully open. The partition control module controls the fog nozzles (6) in the passed area to remain open during the delayed closing time until the timing module ends and closes. The partition control module controls the fog nozzles (6) in the unreached area to be closed. The timing module also stores the historical dwell time of the fabric trolley (1) when passing through adjacent curtains (11). The partition control module predicts the estimated time when the fabric trolley (1) will arrive at the next curtain (11) based on the historical dwell time and pre-opens the fog nozzles (6) in the next area before the estimated time.

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