Dust suppression apparatus for use in the transport of ores

Abstract

The application discloses ore conveying process dust suppression equipment, relates to the technical field of ore conveying dust suppression, and comprises a negative pressure dust collection mechanism, an auxiliary cleaning mechanism for dredging a filter screen and an auxiliary ash discharge mechanism, the auxiliary cleaning mechanism comprises a linkage flap mechanism and a force storage oscillation mechanism, the linkage flap mechanism generates rotation by relying on the impact of the falling stone, and the force storage oscillation mechanism releases force to impact the filter screen when the linkage flap mechanism resets. When the stone falls, the linkage flap mechanism arranged to be set is rotated, the force storage oscillation mechanism arranged to be set is moved to store force by relying on the linkage flap mechanism, so that when the stone stops falling each time, the linkage flap mechanism resets, the force storage oscillation mechanism releases the energy storage effect on the filter screen, dust attached to the filter screen is shaken off, the filtering effect of the filter screen is maintained, energy is not additionally provided for cleaning and maintenance or manual maintenance, the maintenance convenience is improved, and continuous use of the device is ensured.

Description

Technical Field

[0001] This invention relates to the technical field of dust suppression during ore transportation, and particularly to a dust suppression device during ore transportation. Background Technology

[0002] In mines, quarries, and bulk material transfer systems, when ore is transferred by belt conveyors or unloaded by unloading trucks into corresponding conveying troughs, the induced airflow generated by the falling stones will stir up a large amount of fine dust, which seriously pollutes the working environment and threatens the health of workers, so it is necessary to suppress it.

[0003] Currently, the main method of dust removal is to install dust collectors at the corresponding conveying and transfer points. Since some stones are not easy to get wet, in order to prevent them from affecting subsequent processing, negative pressure dust removal devices are used. These devices use negative pressure to draw air from the material transfer point, carrying away most of the dust and reducing the degree of dust pollution. The dust is also filtered and collected by internal filter elements.

[0004] However, when existing negative pressure dust collection devices are used for dust extraction, dust gradually accumulates on the surface of the internal filter elements, causing surface blockage and affecting airflow, thus preventing normal filtration. Therefore, the filter elements need to be cleaned regularly. However, relying on manual cleaning and maintenance is inconvenient and labor-intensive. Although some devices such as pulse valves are installed on the dust collector to periodically clean the filter elements with compressed air, this method requires additional energy to operate. Moreover, some fine dust particles are suspended near the filter screen after each compressed air impact, making it difficult for them to settle and easily re-adhere to the filter elements with the airflow, reducing the cleaning and maintenance effect. Summary of the Invention

[0005] The purpose of this invention is to provide a dust suppression device for ore transportation, so as to solve the technical problem that the negative pressure dust suppression device used in the ore transportation process is not convenient for effectively cleaning and maintaining the internal filter elements.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution: A dust suppression device for ore transportation includes a negative pressure dust collection mechanism installed on an inclined conveying chute. The negative pressure dust collection mechanism includes a filter screen for filtering dust from the air under negative pressure. The device also includes: An auxiliary cleaning mechanism for unclogging a filter screen includes a linkage flap mechanism and a power-accumulating vibration mechanism. The linkage flap mechanism is installed at the feeding position of the inclined conveying chute and rotates by the impact of the falling stones. The power-accumulating vibration mechanism is installed on the filter screen. During the rotation of the linkage flap mechanism, the power-accumulating vibration mechanism accumulates power. When the linkage flap mechanism resets, the power-accumulating vibration mechanism releases its force to impact the filter screen. An auxiliary dust removal mechanism is provided, which includes a dust collection box and an auxiliary suction mechanism. The auxiliary suction mechanism draws air from the space where the filter is located and delivers it into the dust collection box during the release of force by the accumulating vibration mechanism.

[0007] Preferably, the energy storage and vibration mechanism includes a lifting impact block and an elastic connector, and the negative pressure dust collection mechanism includes a negative pressure box. The negative pressure box is used to draw air from above the conveying inclined guide chute and allow the airflow to pass through the filter screen from bottom to top. The filter screen is connected to the negative pressure box through the elastic connector. The lifting impact block is used to rise when the linkage flipping mechanism rotates due to the impact of the sliding stone, and to fall and impact the elastic connector when the linkage flipping mechanism resets.

[0008] Preferably, the elastic connector includes a force-bearing baffle, a support spring, and a connecting guide rod. The force-bearing baffle is disposed between the negative pressure chamber and the lifting impact block, and the force-bearing baffle is connected to the top of the negative pressure chamber through the support spring. The connecting guide rod is fixedly connected to the bottom of the force-bearing baffle, and the connecting guide rod extends into the interior of the negative pressure chamber and is fixedly connected to the filter screen.

[0009] Preferably, the negative pressure dust collection mechanism further includes a top frame, which is fixedly connected to the inside of the negative pressure box and is positioned at the bottom of the filter screen, which is made of woven elastic metal wire.

[0010] Preferably, the linkage flipping mechanism includes a material blocking plate, a traction rope, and a guide pulley assembly. One side of the material blocking plate is rotatably connected to the feeding position of the conveying inclined guide chute via a rotating shaft, and the other side of the material blocking plate is connected to the lifting impact block via a traction rope. The traction rope is also connected to the guide pulley assembly.

[0011] Preferably, the auxiliary suction mechanism includes a piston mechanism and a venturi tube. The piston mechanism is configured above the lifting impact block and includes a one-way suction pipe and a one-way exhaust pipe. When the lifting impact block rises, the piston mechanism draws in air through the one-way suction pipe. When the lifting impact block falls, the piston mechanism exhausts air through the one-way exhaust pipe. The one-way exhaust pipe is connected to the air inlet end of the venturi tube, and the air outlet end of the venturi tube is connected to the dust collection box. A side suction pipe that connects to the bottom space of the filter is connected to the throat of the venturi tube.

[0012] Preferably, the piston mechanism includes a piston cylinder, a piston block, and a linkage lifting block. The piston cylinder is fixedly disposed above the negative pressure chamber, and the piston block is slidably disposed inside the piston cylinder. A lifting rod that passes through the bottom of the piston cylinder is fixedly connected to the bottom of the piston block, and the linkage lifting block is fixedly connected to the lifting rod and is positioned above the lifting impact block.

[0013] Preferably, the bottom of the negative pressure box is provided with a dust hopper, and the bottom of the dust hopper is connected to the dust collection box.

[0014] Preferably, the device further includes a linkage valve mechanism for controlling the opening and closing of the ash hopper. The linkage valve mechanism includes a valve plate and a tilting drive mechanism. The valve plate is fitted inside the ash hopper. One side of the valve plate is rotatably connected to the inner wall of the ash hopper. A coil spring is connected between the side of the valve plate rotatably connected to the ash hopper and the inner wall of the ash hopper. During the lifting process, the linkage lifting block causes the valve plate to rotate and open through the tilting drive mechanism.

[0015] Preferably, the tilting drive mechanism includes a swing arm and a one-way hook plate. The swing arm is disposed on the outside of the ash hopper, and one end of the swing arm is coaxially connected to the valve plate. The swing arm and the valve plate are parallel and staggered. A lifting frame is fixedly connected to the linkage lifting block. The one-way hook plate is longitudinally aligned with the other end of the swing arm. One end of the one-way hook plate is attached to one side of the bottom of the lifting frame, and the upper edge of the end of the one-way hook plate attached to the lifting frame is movably connected to the lifting frame through a spring-loaded hinge.

[0016] The beneficial effects of this invention are: 1. In this invention, when ore falls onto the conveying components such as the inclined guide chute, a negative pressure dust extraction mechanism is used to suck up the dust, reducing the degree of dust pollution. The dust is filtered by a filter screen. When the ore falls, it impacts the set linkage flap mechanism, which rotates. The linkage flap mechanism drives the set energy-storing vibration mechanism to move and store energy. When the ore stops falling each time, the linkage flap mechanism resets, and the energy-storing vibration mechanism releases the energy stored in the filter screen, causing the dust attached to the filter screen to be shaken off, maintaining the filtration effect of the filter screen. No additional energy is required for cleaning and maintenance or manual maintenance, which improves the convenience of maintenance and ensures continuous use of the device.

[0017] 2. In this invention, each time the stone falls onto the conveying guide chute, it will impact the baffle plate of the linkage flipping mechanism. When the baffle plate flips, it pulls the lifting impact block up through the traction rope, thereby converting the potential energy of the falling stone into the gravitational potential energy of the lifting impact block. This achieves energy storage, so that when the stone stops falling, it will automatically fall and impact the force baffle connected to the filter screen. The force baffle will then instantly compress the support spring, and the support spring will release its elasticity to generate vibration, causing the dust on the filter screen to fall off.

[0018] 3. Each time the lifting impact block rises, it can drive the set linkage lifting block to rise. The linkage lifting block causes the piston mechanism to draw in air. When the lifting impact block falls, the linkage lifting block drives the piston in the piston mechanism to compress the drawn-in air. The compressed air is then forced to pass through the venturi tube. The negative pressure generated by the venturi tube draws in the air around the filter screen after it has been vibrated. This facilitates the removal of fine dust suspended near the filter screen, preventing dust from re-attaching to the filter screen and ensuring effective maintenance and cleaning.

[0019] 4. The bottom of the negative pressure box of the present invention is also equipped with a dust hopper to store the dust filtered and blocked by the filter screen, and the dust hopper and the venturi tube are connected to the same dust collection box, so that the dust can be collected and processed. 5. Each time the lifting impact block rises and drives the linkage lifting block to rise, the linkage lifting block can rotate the swing arm set by the one-way hook plate. The swing arm then drives the valve plate in the ash hopper to rotate and open, so that the dust in the ash hopper can be discharged into the ash collection box. After the one-way hook plate passes the swing arm, the valve plate can automatically rebound and reset by the rebound force of the disc spring, separating the ash hopper and the ash collection box. This prevents the dust in the box from being stirred up when the venturi tube transports dust into the collection box through the airflow, and from spreading from the ash hopper position into the negative pressure box. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the invention. Figure 2 ;; Figure 3 This is a schematic diagram of the structure in which the baffle plate and the lifting impact block are connected in this invention; Figure 4 This is a schematic diagram of the relative positional distribution of the lifting impact block, the force-bearing baffle, and the linkage lifting block in this invention; Figure 5 yes Figure 4 A magnified schematic diagram of the partial structure at point A in the middle; Figure 6 This is a schematic diagram of the structure in which the filter screen and the negative pressure box are connected in this invention; Figure 7 yes Figure 6 A magnified view of the structure at point B in the middle; Figure 8 This is a schematic diagram of the state when the lifting impact block rises, causing the piston cylinder to draw in air in the present invention; Figure 9 This is a schematic diagram of the state in which the piston cylinder begins to compress and deliver air to the venturi tube after the lifting impact block descends in this invention. Figure 10This is a schematic diagram of the structure in this invention where a one-way hook plate pushes the rotating arm to open the valve plate in the ash hopper.

[0021] Explanation of reference numerals in the attached figures: 1. Unloading platform; 2. Conveying inclined guide chute; 3. Negative pressure dust collection mechanism; 31. Negative pressure box; 32. Upper suction pipe; 33. Lower suction pipe; 34. Dust hopper; 35. Filter screen; 36. Top frame; 4. Auxiliary cleaning mechanism; 41. Material blocking plate; 42. Traction rope; 43. Guide pulley block; 44. Lifting impact block; 45. Force-bearing baffle; 46. Connecting guide rod; 47. Support spring; 5. Auxiliary dust discharge mechanism; 51. Piston cylinder; 52. One-way air outlet pipe; 53. Venturi tube; 54. Side suction pipe; 55. Linked lifting block; 56. Piston block; 57. One-way suction pipe; 6. Dust collection box; 7. Linked valve mechanism; 71. Swing arm; 72. One-way hook plate; 73. Lifting frame; 74. Valve plate. Detailed Implementation

[0022] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0023] like Figures 1-10 As shown, a dust suppression device for ore transportation is used to suppress dust generated during the unloading of stones and their entry into subsequent conveyor chutes or conveyor belts, or at the transfer point between two adjacent conveyor belts. Specifically, the device includes a negative pressure dust collection mechanism 3 fitted onto a conveyor inclined chute 2. The conveyor inclined chute 2 is fitted onto one side of an unloading platform 1. After the truck transporting the stones drives onto the unloading platform 1, its cargo bed aligns with the conveyor inclined chute 2, and then the cargo bed is tilted up, allowing the stones to slide into the conveyor inclined chute 2. The bottom of the conveyor inclined chute 2 can be equipped with... Stone processing equipment or stone conveyor belts are installed. Of course, the position of the unloading platform 1 can also be set as a stone conveyor belt, depending on the specific needs. When the stone falls onto the inclined guide chute 2, dust is raised due to slippage and vibration. At this time, the dust is sucked away by the negative pressure dust collection mechanism 3 to prevent the dust from spreading and polluting the surrounding links and equipment. It should be noted that the use of the negative pressure dust collection mechanism 3 for dust suppression is mainly for stones that are not easy to spray, such as salt-containing ores. The negative pressure dust collection mechanism 3 includes a filter screen 35 for filtering dust in the negative pressure suction air. The equipment also includes an auxiliary cleaning mechanism 4 for unclogging the filter screen 35. The auxiliary cleaning mechanism 4 includes a linkage flap mechanism and a power storage vibration mechanism. The linkage flap mechanism is set at the feeding position of the conveying inclined guide chute 2 and rotates by the impact of the falling stones. The power storage vibration mechanism is set on the filter screen 35. During the rotation of the linkage flap mechanism, the power storage vibration mechanism stores power. When the linkage flap mechanism resets, the power storage vibration mechanism releases the force to impact the filter screen 35, causing the filter screen 35 to vibrate. That is, when the stones stop falling, the stored force is released to act on the filter screen 35, which makes it easier to shake off the dust attached to the surface of the filter screen 35, thereby avoiding the filter screen 35 from being blocked and affecting the airflow, and greatly reducing the manual maintenance cycle. The device also includes an auxiliary dust removal mechanism 5, which includes a dust collection box 6 and an auxiliary suction mechanism. During the release of force by the accumulating vibration mechanism, the auxiliary suction mechanism draws air from the space where the filter screen 35 is located and delivers it to the dust collection box 6, so that the dust shaken off from the filter screen 35 is effectively removed, preventing some fine dust from being suspended near the filter screen 35 and then re-attached to the filter screen 35 under the action of airflow, thus affecting the cleaning effect.

[0024] In some specific implementation schemes, refer to Figure 4 and Figure 6 As shown, the energy storage and vibration mechanism includes a lifting impact block 44 and an elastic connector. The negative pressure dust collection mechanism 3 includes a negative pressure box 31. A lower suction pipe 33 is provided on one side of the negative pressure box 31 near the bottom, which works in conjunction with the inclined conveying guide chute 2. Multiple suction ports are evenly distributed on the lower suction pipe 33. An upper suction pipe 32 is provided on one side of the negative pressure box 31 near the top, which connects to the negative pressure fan. The filter screen 35 is located between the lower suction pipe 33 and the upper suction pipe 32, meaning that the negative pressure box 31 can pass through the lower suction pipe 33. Air containing dust is drawn from above the inclined conveyor chute 2, and then the airflow passes through the filter screen 35 from bottom to top, so that the filter screen 35 can filter the drawn-in air containing dust. The filter screen 35 is connected to the negative pressure box 31 through an elastic connector. The lifting impact block 44 is used to rise when the linkage flap mechanism rotates due to the impact of the sliding stone, and to fall and impact the elastic connector when the linkage flap mechanism resets, so that the filter screen 35 can shake off the attached dust as the elastic connector vibrates.

[0025] Among them, reference Figure 6As shown, the elastic connector includes a force-bearing baffle 45, a support spring 47, and a connecting guide rod 46. The force-bearing baffle 45 is disposed between the negative pressure box 31 and the lifting impact block 44, and the force-bearing baffle 45 is connected to the top of the negative pressure box 31 through the support spring 47. The support spring 47 is compressible and deformable. Multiple connecting guide rods 46 are provided and are vertically fixedly connected to the bottom of the force-bearing baffle 45. Specifically, they can be distributed at the four corner positions at the bottom of the force-bearing baffle 45. Each connecting guide rod 46 penetrates into the interior of the negative pressure box 31 and is fixedly connected to the filter screen 35. The filter screen 35 can slide relative to the interior of the negative pressure box 31.

[0026] When the lifting impact block 44 falls, it impacts the force-bearing baffle 45. The force-bearing baffle 45 is subjected to instantaneous impact force and compresses the support spring 47. When the support spring 47 is compressed to a certain extent, it releases the rebound force, which facilitates the up-and-down oscillation of the force-bearing baffle 45. In this way, the force-bearing baffle 45 drives the filter screen 35 to oscillate, which facilitates the shaking off of the attached dust.

[0027] It should be noted that, in order to enhance the shaking effect of the filter screen 35, a ring of elastic metal retaining ring can be fixedly installed on the inner wall of the negative pressure box 31. The filter screen 35 may include an annular frame and a spherical filter screen connected to the annular frame. The elastic metal retaining ring is located below the annular frame of the filter screen 35. The force baffle 45 can be fixedly connected to the annular frame of the filter screen 35 through the connecting guide rod 46. When the force baffle 45 is impacted, it will cause the filter screen 35 to descend and squeeze the elastic metal retaining ring. The elastic metal retaining ring will also deform and generate a rebound force, which facilitates the up and down vibration of the filter screen 35.

[0028] In other specific implementation schemes, refer to Figure 6 As shown, the negative pressure dust collection mechanism 3 also includes a top frame 36, which is fixedly connected to the inside of the negative pressure box 31. The top frame 36 includes multiple vertical rods and is positioned at the bottom of the filter screen 35. The filter screen 35 can be made of elastic metal wire. When the filter screen 35 shakes up and down due to the impact of the lifting impact block 44, the filter screen 35 will collide with the top frame 36, thereby facilitating the overall vibration to shake off the dust.

[0029] In some specific implementation schemes, refer to Figure 1 and Figure 3As shown, the linkage flipping mechanism includes a material-blocking rotating plate 41, a traction rope 42, and a guide pulley group 43. One side of the material-blocking rotating plate 41 is rotatably connected to the feeding position of the inclined conveying chute 2 via a rotating shaft, and the other side of the material-blocking rotating plate 41 is connected to the lifting impact block 44 via the traction rope 42. To prevent the traction rope 42 from obstructing the passage of stones through the material-blocking rotating plate 41, the traction rope 42 can be connected to the edge of the material-blocking rotating plate 41 near the edge of the inclined conveying chute 2, and two ropes can be arranged in pairs. The traction rope 42 is also connected to the guide pulley group 43, which is connected to the inclined conveying chute 2 via a bracket. The guiding action of the guide pulley group 43 allows the material-blocking rotating plate 41 to flip downwards and pull one end of the traction rope 42, while the other end of the traction rope 42 pulls the lifting impact block 44 upwards. It should be noted that the initial state of the material-blocking rotating plate 41 is in a tilted state. In actual operation, when the stone falls into the inclined conveyor chute 2, the stone first hits the downward blocking plate 41, and the blocking plate 41 flips downward, thereby relying on the traction rope 42 to pull the lifting impact block 44 up to achieve power storage.

[0030] It should be noted that in order to enable the negative pressure fan connected to the negative pressure dust collection mechanism 3 to start and stop automatically, a pressure sensing switch can be installed on the baffle plate 41, and the pressure sensing switch is electrically connected to the negative pressure fan. When the stone presses down on the baffle plate 41, the pressure sensing switch will generate a sense, and when the sense reaches the set value, the negative pressure fan will start.

[0031] In some specific implementation plans, such as Figure 2 and Figure 6As shown, the auxiliary suction mechanism includes a piston mechanism and a venturi tube 53. The piston mechanism is positioned above the lifting impact block 44 and includes a one-way suction pipe 57 and a one-way exhaust pipe 52. When the lifting impact block 44 rises, the piston mechanism draws air through the one-way suction pipe 57. The suction position can be extended away from the unloading environment through the pipe. When the lifting impact block 44 falls, the piston mechanism exhausts air through the one-way exhaust pipe 52. The one-way exhaust pipe 52 is connected to the inlet end of the venturi tube 53, and the outlet end of the venturi tube 53 is connected to the dust collection box 6. The throat of the venturi tube 53 is connected to a side suction pipe 54 that connects to the bottom space of the filter screen 35. Here, the venturi tube 53 is existing technology, and its inlet end has a gradually decreasing diameter. The outlet end is a gradually increasing flared end, while the throat, with the smallest diameter, connects the inlet and outlet ends. Its operating principle is as follows: When the piston mechanism exhausts air into the Venturi tube 53 through the one-way outlet pipe 52, the airflow passes through the constricted end of the inlet. As the cross-sectional area decreases, the fluid velocity increases sharply and the pressure decreases. According to Bernoulli's equation, the dynamic pressure increases and the static pressure decreases sharply. Therefore, at the throat, the static pressure reaches its minimum, forming a negative pressure zone. This facilitates the side suction pipe 54 to draw air from the vibrating filter 35, drawing suspended dust into the Venturi tube 53. The air carrying dust enters the throat and mixes with the mainstream fluid. Then, it is discharged into the dust collection box 6 through the outlet end of the Venturi tube 53, achieving effective discharge of suspended dust.

[0032] It should be noted that the side suction pipe 54 may connect not only to the bottom space of the filter 35, but also to the upper space of the filter 35. The specific settings can be adjusted according to actual needs.

[0033] Among them, reference Figure 6 As shown, the piston mechanism includes a piston cylinder 51, a piston block 56, and a linkage lifting block 55. The piston cylinder 51 is fixedly positioned above the negative pressure box 31, with an open top and a closed bottom. The piston block 56 is slidably fitted inside the piston cylinder 51, and a rubber sealing ring can be installed on the edge of the piston block 56. A lifting rod is fixedly connected to the bottom of the piston block 56, penetrating the bottom of the piston cylinder 51. The linkage lifting block 55 is fixedly connected to the lifting rod and is positioned above the lifting impact block 44. The weight of the linkage lifting block 55 is less than the weight of the lifting impact block 44. A one-way suction pipe 57 and a one-way exhaust pipe 52 are respectively installed on both sides of the bottom of the piston cylinder 51. Both the one-way suction pipe 57 and the one-way exhaust pipe 52 consist of a pipe body and a one-way valve installed inside the pipe body, only the direction of airflow restricted is different.

[0034] When the baffle plate 41 is in its initial tilted state, the lifting impact block 44 is attached to the force baffle 45, and the linkage lifting block 55 is attached to the lifting impact block 44. When the lifting impact block 44 rises, it drives the linkage lifting block 55 to rise synchronously. During this process, the linkage lifting block 55 drives the piston block 56 to rise through the lifting rod. At this time, the piston cylinder 51 draws in air through the one-way suction pipe 57. When the lifting impact block 44 falls, since the weight of the linkage lifting block 55 is less than the weight of the lifting impact block 44, and the piston block 56 connected to it will be subject to the friction force of the inner wall of the piston cylinder 51 and the air pressure reaction force during the descent of the piston block 56 relative to the piston cylinder 51, the descent speed is slower. During this process, the piston block 56 gradually compresses the air in the piston cylinder 51, so that the compressed air is discharged from the one-way exhaust pipe 52 and discharged to the venturi tube 53, and can continue to work for a long time.

[0035] In some specific implementations, since large dust particles filtered and blocked by the negative pressure dust collection mechanism 3 will fall to the bottom of the negative pressure box 31, a dust hopper 34 can be set at the bottom of the negative pressure box 31, and the bottom of the dust hopper 34 is connected to the dust collection box 6. This allows the dust filtered and blocked inside the negative pressure box 31 to fall into the dust collection box 6 through the dust hopper 34. In this way, the suspended dust sucked by the venturi tube 53 and the normally falling dust can be concentrated in the dust collection box 6 for centralized processing. Furthermore, a drawer box can be set inside the dust collection box 6 to remove the accumulated dust by horizontally pulling it out.

[0036] In a further specific implementation, since the Venturi tube 53 blows air into the dust collection box 6, it may cause the dust inside to be stirred up and blown into the negative pressure box 31 from the connected dust hopper 34. To avoid this problem, refer to... Figure 5 , Figure 7 and Figure 10 As shown, the device also includes a linkage valve mechanism 7 for controlling the opening and closing of the ash hopper 34. The linkage valve mechanism 7 includes a valve plate 74 and a flipping drive mechanism. The valve plate 74 is fitted inside the ash hopper 34. One side of the valve plate 74 is rotatably connected to the inner wall of the ash hopper 34 via a rotating shaft. A coil spring is connected between the side of the valve plate 74 rotatably connected to the ash hopper 34 and the inner wall of the ash hopper 34. Specifically, a protruding frame can be fixedly installed on the inner wall of the ash hopper 34. The valve plate 74 fits against the bottom of the frame, and the edge of the valve plate 74 does not need to contact the inner wall of the ash hopper 34, leaving room for rotation. When the valve plate 74 fits against the frame, it can effectively seal the ash hopper 34. At this time, the coil spring is in its original state. During the lifting process, the linkage lifting block 55 causes the valve plate 74 to rotate and open through the flipping drive mechanism.

[0037] The tilting drive mechanism includes a swing arm 71 and a one-way hook plate 72. The swing arm 71 is located on the outside of the ash hopper 34, and one end of the swing arm 71 is coaxially connected to the valve plate 74. The swing arm 71 and the valve plate 74 are parallel and staggered, that is, when the valve plate 74 is on the left side of the connecting shaft, the swing arm 71 is on the right side of the connecting shaft. A lifting frame 73 is fixedly connected to the linkage lifting block 55. The bottom of the lifting frame 73 extends to a position close to the swing arm 71. The one-way hook plate 72 is longitudinally aligned with the other end of the swing arm 71. One end of the one-way hook plate 72 is attached to one side of the bottom of the lifting frame 73, and the upper edge of the end of the one-way hook plate 72 attached to the lifting frame 73 is movably connected to the lifting frame 73 through a spring hinge. This ensures that the one-way hook plate 72 can only tilt upward from the horizontal position and cannot tilt downward from the horizontal position.

[0038] When the linkage lifting block 55 is not raised, the one-way hook plate 72 is aligned below the swing arm 71. At this time, the valve plate 74 seals the inside of the ash hopper 34. When the linkage lifting block 55 is raised, it drives the connected one-way hook plate 72 to rise synchronously through the lifting frame 73. During the raising process, the one-way hook plate 72 comes into contact with the swing arm 71. Since the one-way hook plate 72 can only tilt upward from the horizontal position, it pushes the swing arm 71 upward during the raising process. The swing arm 71 then deflects downward and opens in conjunction with the misaligned valve plate 74, facilitating the opening of the ash hopper 34. Dust from 4 falls into the dust collection box 6. When the one-way hook plate 72 completely passes the position of the swing arm 71, the valve plate 74 rotates back to reset and re-closes the dust hopper 34. When the linkage lifting block 55 lowers with the piston block 56 to deliver air into the dust collection box 6, even if the one-way hook plate 72 descends past the swing arm 71, the one-way hook plate 72 can deflect upward from the horizontal position, so the one-way hook plate 72 can deflect to avoid the swing arm 71 and will not cause the valve plate 74 to open, thus preventing the airflow from carrying dust through the dust hopper 34 and rushing into the negative pressure box 31.

[0039] It should be noted that the position where the dust collection box 6 connects to the venturi tube 53 can be set with a filter cloth. The filter cloth can prevent the internal dust from spreading out, while allowing the air that enters the dust collection box 6 through the venturi tube 53 to be discharged.

[0040] It should be noted that the above solution only suppresses the dust that is seriously raised in the stone unloading and conveying section to a certain extent and reduces the impact of dust pollution; it does not completely eliminate the dust.

[0041] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution will now be briefly explained in conjunction with specific application scenarios: First, the truck loaded with stones is driven to the unloading platform 1, and then the stones are unloaded into the conveying inclined guide chute 2, or the stones are conveyed to the conveying inclined guide chute 2 by other stone conveying mechanisms. When the stones fall, they first hit the downward blocking plate 41, and the blocking plate 41 flips downward, thereby pulling the lifting impact block 44 up by the traction rope 42. When the lifting impact block 44 rises, it drives the linkage lifting block 55 to rise synchronously. During this process, the linkage lifting block 55 drives the piston block 56 to rise through the lifting rod. At this time, the piston cylinder 51 draws in air through the one-way suction pipe 57. Meanwhile, the negative pressure fan runs, causing the lower suction pipe 33 above the conveying inclined guide chute 2 to draw in dusty air into the negative pressure box 31. The air then passes through the filter screen 35 from bottom to top, allowing the filter screen 35 to filter the dusty air. The filtered air can then flow away through the upper suction pipe 32, thereby suppressing the stone unloading and transmission process to a certain extent and preventing serious dust diffusion and pollution of the surrounding environment.

[0042] When the stone material stops falling from the feed side of the inclined conveyor chute 2, the lifting impact block 44 falls under the action of gravity. At this time, the negative pressure fan of the negative pressure dust collection mechanism 3 stops, and the large dust particles inside can fall into the dust hopper 34 at the bottom. The falling lifting impact block 44 then hits the force baffle 45. The force baffle 45 is subjected to instantaneous impact force and compresses the support spring 47. When the support spring 47 is compressed to a certain extent, it releases the rebound force, which facilitates the up and down vibration of the force baffle 45. In this way, the force baffle 45 drives the filter screen 35 to vibrate, which facilitates the shaking off of the attached dust. This allows the dust attached to the surface of the filter screen 35 to be knocked down, thereby avoiding the filter screen 35 from being blocked and affecting the airflow, and greatly reducing the manual maintenance cycle.

[0043] When the lifting impact block 44 falls, the weight of the linkage lifting block 55 is less than the weight of the lifting impact block 44, and the piston block 56 connected to it will be subject to friction from the inner wall of the piston cylinder 51 and air pressure reaction force during the descent of the piston block 56 relative to the piston cylinder 51, resulting in a slower descent speed. During this process, the piston block 56 gradually compresses the air in the piston cylinder 51, allowing the compressed air to be discharged from the one-way outlet pipe 52 and into the venturi tube 53 for a relatively long time. When the airflow passes through the constricted end of the venturi tube 53 inlet, the fluid velocity increases sharply and the pressure decreases as the cross-sectional area decreases. According to Bernoulli's equation, the dynamic pressure increases and the static pressure decreases sharply. Therefore, at the throat, the static pressure reaches a minimum, forming a negative pressure zone, which facilitates the side suction pipe 54 to draw air from the vibrating filter 35 and draws the suspended dust into the venturi tube 53. The air carrying dust enters the throat and mixes with the mainstream fluid, and then is discharged into the dust collection box 6 through the outlet end of the venturi tube 53, achieving effective discharge of suspended dust.

[0044] It should be noted that when the linkage lifting block 55 is not raised, the one-way hook plate 72 is aligned below the swing arm 71. At this time, the valve plate 74 seals the inside of the ash hopper 34. When the linkage lifting block 55 is raised, it drives the connected one-way hook plate 72 to rise synchronously through the lifting frame 73. During the raising process, the one-way hook plate 72 comes into contact with the swing arm 71. Since the one-way hook plate 72 can only tilt upward from the horizontal position, it pushes the swing arm 71 upward during the raising process. The swing arm 71 then deflects downward and opens in conjunction with the misaligned valve plate 74. Dust in the ash hopper 34 falls into the dust collection box 6. When the one-way hook plate 72 has completely passed the position of the swing arm 71, the valve plate 74 rotates back to reset and re-closes the ash hopper 34. When the linkage lifting block 55 lowers with the piston block 56 to deliver air into the dust collection box 6, even if the one-way hook plate 72 falls past the swing arm 71, the one-way hook plate 72 can deflect upward from the horizontal position, so the one-way hook plate 72 can deflect and avoid the swing arm 71, and will not cause the valve plate 74 to open, thus preventing the airflow from carrying dust through the ash hopper 34 and rushing into the negative pressure box 31.

[0045] The above-disclosed embodiments are merely a few specific examples of the present invention. However, the embodiments of the present invention are not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A dust suppression device for ore transportation, comprising a negative pressure dust collection mechanism (3) configured on a conveying inclined guide chute (2), wherein the negative pressure dust collection mechanism (3) includes a filter screen (35) for filtering dust from the air under negative pressure; characterized in that, Also includes: An auxiliary cleaning mechanism (4) for unclogging the filter screen (35) includes a linkage flap mechanism and a power storage vibration mechanism. The linkage flap mechanism is installed at the feeding position of the conveying inclined guide chute (2) and rotates by the impact of the falling stones. The power storage vibration mechanism is installed on the filter screen (35). During the rotation of the linkage flap mechanism, the power storage vibration mechanism stores power. When the linkage flap mechanism is reset, the power storage vibration mechanism releases force to impact the filter screen (35). The auxiliary dust removal mechanism (5) includes a dust collection box (6) and an auxiliary suction mechanism. The auxiliary suction mechanism draws air from the space where the filter screen (35) is located and delivers it into the dust collection box (6) during the release of force by the power storage and vibration mechanism.

2. The dust suppression device for ore transportation according to claim 1, characterized in that, The energy storage and vibration mechanism includes a lifting impact block (44) and an elastic connector. The negative pressure dust collection mechanism (3) includes a negative pressure box (31). The negative pressure box (31) is used to draw air from above the conveying inclined guide chute (2) and make the airflow pass through the filter screen (35) from bottom to top. The filter screen (35) is connected to the negative pressure box (31) through the elastic connector. The lifting impact block (44) is used to rise when the linkage flipping mechanism rotates due to the impact of the falling stone, and to fall and impact the elastic connector when the linkage flipping mechanism resets.

3. The dust suppression device for ore transportation according to claim 2, characterized in that, The elastic connector includes a force-bearing baffle (45), a support spring (47), and a connecting rod (46). The force-bearing baffle (45) is disposed between the negative pressure box (31) and the lifting impact block (44), and the force-bearing baffle (45) is connected to the top of the negative pressure box (31) through the support spring (47). The connecting rod (46) is fixedly connected to the bottom of the force-bearing baffle (45), and the connecting rod (46) extends into the interior of the negative pressure box (31) and is fixedly connected to the filter screen (35).

4. A dust suppression device for ore transportation according to claim 2, characterized in that, The negative pressure dust collection mechanism (3) also includes a top frame (36), which is fixedly connected to the inside of the negative pressure box (31) and is located at the bottom of the filter screen (35), which is made of elastic metal wire.

5. A dust suppression device for ore transportation according to claim 2, characterized in that, The linkage flipping mechanism includes a material blocking plate (41), a traction rope (42), and a guide pulley group (43). One side of the material blocking plate (41) is rotatably connected to the feeding position of the conveying inclined guide chute (2) via a rotating shaft, and the other side of the material blocking plate (41) is connected to the lifting impact block (44) via the traction rope (42). The traction rope (42) is also connected to the guide pulley group (43).

6. A dust suppression device for ore transportation according to claim 2, characterized in that, The auxiliary suction mechanism includes a piston mechanism and a venturi tube (53). The piston mechanism is positioned above the lifting impact block (44). The piston mechanism includes a one-way suction pipe (57) and a one-way exhaust pipe (52). When the lifting impact block (44) rises, the piston mechanism draws air through the one-way suction pipe (57). When the lifting impact block (44) falls, the piston mechanism exhausts air through the one-way exhaust pipe (52). The one-way exhaust pipe (52) is connected to the air inlet end of the venturi tube (53). The air outlet end of the venturi tube (53) is connected to the dust collection box (6). The throat of the venturi tube (53) is connected to a side suction pipe (54) that connects to the bottom space of the filter screen (35).

7. A dust suppression device for ore transportation according to claim 6, characterized in that, The piston mechanism includes a piston cylinder (51), a piston block (56), and a linkage lifting block (55). The piston cylinder (51) is fixedly disposed above the negative pressure box (31), and the piston block (56) is slidably disposed inside the piston cylinder (51). A lifting rod that penetrates the bottom of the piston cylinder (51) is fixedly connected to the bottom of the piston block (56). The linkage lifting block (55) is fixedly connected to the lifting rod, and the linkage lifting block (55) is positioned above the lifting impact block (44).

8. A dust suppression device for ore transportation according to claim 7, characterized in that, The bottom of the negative pressure box (31) is provided with a dust hopper (34), and the bottom of the dust hopper (34) is connected to the dust collection box (6).

9. A dust suppression device for ore transportation according to claim 8, characterized in that, It also includes a linkage valve mechanism (7) for controlling the opening and closing of the ash hopper (34). The linkage valve mechanism (7) includes a valve plate (74) and a flipping drive mechanism. The valve plate (74) is fitted inside the ash hopper (34). One side of the valve plate (74) is rotatably connected to the inner wall of the ash hopper (34), and a coil spring is connected between the side of the valve plate (74) rotatably connected to the inner wall of the ash hopper (34). During the lifting process, the linkage lifting block (55) causes the valve plate (74) to rotate and open through the flipping drive mechanism.

10. A dust suppression device for ore transportation according to claim 9, characterized in that, The flipping drive mechanism includes a swing arm (71) and a one-way hook plate (72). The swing arm (71) is located on the outside of the ash hopper (34), and one end of the swing arm (71) is coaxially connected to the valve plate (74). The swing arm (71) and the valve plate (74) are parallel and staggered. A lifting frame (73) is fixedly connected to the linkage lifting block (55). The one-way hook plate (72) is longitudinally aligned with the other end of the swing arm (71). One end of the one-way hook plate (72) is attached to one side of the bottom of the lifting frame (73), and the upper edge of the end of the one-way hook plate (72) attached to the lifting frame (73) is movably connected to the lifting frame (73) through a spring hinge.

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