Efficient pulse type dust cleaning and collecting device for charging trolley

Abstract

The invention provides an efficient pulse type dust cleaning and collecting device for a charging trolley, and relates to the technical field of mine engineering, the efficient pulse type dust cleaning and collecting device comprises a dust hood, a placement opening is formed in the dust hood in a penetrating manner, a pulse valve is mounted on the dust hood, the bottom of the dust hood is communicated with a dust collecting pipe, and one end of the dust collecting pipe is communicated with a dust collecting box; a dust collection channel and a dust collection chamber are formed in the dust collection box, a dust collection opening communicating the dust collection channel and the dust collection chamber is formed in the dust collection box, and a switch door plate is rotationally installed in the dust collection opening and can block the dust collection opening; and a metal filter screen is mounted in the dust collection channel. According to the efficient pulse type dust cleaning and collecting device for the charging trolley, the problems that dust dissipation at a pipe opening of the charging trolley is difficult to control, a filter material is prone to being blocked and abraded, and secondary dust raising pollution is caused can be solved, meanwhile, multi-mechanism cooperative work is achieved through driving of a double-shaft motor, an extra power source is not needed, and the working efficiency is improved. The working efficiency and stability of the device are improved, and the device is suitable for severe working environments of mine engineering.

Description

Technical Field

[0001] This invention relates to the field of mining engineering technology, and in particular to a high-efficiency pulse-type dust cleaning and collection device for a charging trolley. Background Technology

[0002] In blasting projects such as mining and tunneling, the charging trolley is a core piece of automated charging equipment, and its operational efficiency and safety directly affect project progress and construction safety. Currently, most mainstream charging trolleys adopt a pneumatic charging structure, powered by compressed air at 0.4-0.8 MPa. The airflow drives explosive particles to form a gas-solid two-phase flow within the delivery pipeline, achieving precise delivery to the blast hole. However, in actual charging processes, the problem of dust dispersion in the nozzle area has remained unresolved, becoming a key bottleneck restricting construction safety and environmental protection.

[0003] Dust dispersion mainly originates from three core scenarios: First, during the high-speed flow of explosives at the nozzle and the compression against the nozzle wall, some fine particles detach from the main explosive, forming initial dust. Second, due to limitations in borehole construction precision or constraints in on-site working space, the nozzle and borehole opening cannot be perfectly fitted, inevitably resulting in installation gaps that allow some dust to leak into the surrounding environment. Third, when the charge pressure fluctuates by more than ±0.02 MPa (an inherent characteristic of pneumatic systems) or when the borehole is skewed, the frictional resistance between the explosive and the inner wall of the nozzle significantly increases, preventing a large amount of dust from entering the borehole with the main explosive, thus forming a high-density suspended dust cloud around the nozzle. Particularly noteworthy is that the nozzle of a pneumatic charge structure ejects a high-speed airflow, which not only carries dust over a wider area but also creates a turbulent field in the nozzle region (the root mean square velocity of turbulence can reach 1.1-6.2 m / s), further exacerbating the suspension and diffusion of dust.

[0004] Traditional methods often involve using water trucks to suppress dust or fixed dust collection hoods. However, water spraying can cause explosives to absorb moisture and deteriorate, and it cannot specifically cover local dust sources such as gaps in pipe openings. Ordinary dust collection devices are mostly designed for continuous adsorption, which usually filters dust from the airflow through filter elements. Dust easily adheres to the filter elements, causing them to become clogged. Furthermore, the flow of the dust collection airflow can also cause secondary dust generation, leading to abrasion and wear of the filter material by dust particles. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes a high-efficiency pulse dust cleaning and collection device for a charging trolley.

[0006] This invention proposes a high-efficiency pulse-type dust cleaning and collection device for a drug loading trolley, comprising a dust collection hood with a through-hole, a pulse valve installed on the dust collection hood, a dust collection pipe connected to the bottom of the dust collection hood, a dust collection box connected to one end of the dust collection pipe, a dust collection channel and a dust collection chamber inside the dust collection box, a dust collection port connecting the dust collection channel and the dust collection chamber on the dust collection box, and a switch door plate rotatably installed inside the dust collection port, the switch door plate being able to block the dust collection port; A metal filter screen is installed inside the dust collection channel, and a dust cleaning mechanism and a switching mechanism are installed on the dust collection box. The dust cleaning mechanism is used to clean the dust on the metal filter screen, and the switching mechanism is used to open and close the door panel. The dust collection channel is equipped with rotating fan blades.

[0007] Preferably, the dust removal mechanism includes an impact rod and a drive assembly; the impact rod is slidably installed in the dust collection channel, and the end of the impact rod can slide and impact the metal filter screen; The drive assembly is used to drive the impact bar to slide away from the metal filter screen within the dust collection channel; When the door panel is closed, it can drive the impact rod to slide back to its original position and strike the metal filter screen.

[0008] Preferably, the drive assembly includes a dual-axis motor, a semi-threaded rod, and a reducer; the dual-axis motor is installed in the dust collection channel, the reducer is installed between one end of the semi-threaded rod and one of the output shafts of the dual-axis motor, the impact rod is provided with teeth, the thread on the semi-threaded rod meshes with the teeth on the impact rod, and the threaded section of the semi-threaded rod has a notch.

[0009] Preferably, the reduction gear includes a reduction box, a first bevel gear, a second bevel gear, and a third bevel gear; the reduction box is installed in the dust collection channel, the first bevel gear is rotatably installed in the reduction box and is mounted on one of the output shafts of the dual-shaft motor, the second bevel gear is rotatably installed in the reduction box and meshes with the first bevel gear, the third bevel gear is rotatably installed in the reduction box and is connected to the end of the semi-threaded rod, and meshes with the second bevel gear.

[0010] Preferably, the switching mechanism includes a torsion spring and an amplifying switch assembly; the switch door is rotatably mounted inside the dust collection port via a rotating shaft, and the torsion spring is fitted onto the rotating shaft of the switch door; The amplifying switch assembly is used to amplify the sliding displacement of the impact rod and convert it into the rotation angle of the switch door. When the switch door rotates to close, it can also drive the impact rod to slide back and impact the metal filter screen.

[0011] Preferably, the amplification switch assembly includes a vertical rod, a first guide wheel, a transmission amplification box, a second guide wheel, a traction rope, a third guide wheel, a switch rope, and an amplification component; the vertical rod is fixedly connected to the impact rod, the first guide wheel is rotatably installed in the dust collection channel, the transmission amplification box is fixedly installed in the dust collection chamber, the transmission amplification box has a working chamber, the second guide wheel is rotatably installed in the working chamber, one end of the traction rope is fixedly connected to the vertical rod, the traction rope passes sequentially around the first guide wheel and the second guide wheel, the third guide wheel is rotatably installed in the working chamber, one end of the switch rope is connected to the switch door panel, and the switch rope passes around the third guide wheel; The amplifying component is used to amplify the sliding displacement of the traction rope and convert it into the sliding displacement of the switch rope.

[0012] Preferably, the amplification component includes a slide, a moving guide wheel, and a fixed guide wheel; the slide is slidably installed in the working chamber, the end of the traction rope away from the vertical rod is connected to the slide, there are multiple moving guide wheels, all of which are rotatably installed on the slide, there are multiple fixed guide wheels, all of which are rotatably installed in the working chamber, and the other end of the switch rope passes around multiple moving guide wheels and multiple fixed guide wheels in sequence and is connected to the inner wall of the working chamber.

[0013] Preferably, the fan blades are mounted on the other output shaft of the dual-axis motor.

[0014] Preferably, the dust collection hood is provided with a pressure relief port, and a protective component is installed inside the pressure relief port. The protective component is used to slow down the overflow of dust and ensure that outside air enters the dust collection hood.

[0015] Preferably, the protective component includes a cross-shaped silicone valve; the cross-shaped silicone valve is installed inside the pressure relief port.

[0016] The present invention proposes a high-efficiency pulse-type dust cleaning and collection device for a charging trolley, which has the following beneficial effects: by setting up a dust collection hood, pulse valve, dust collection pipe, dust collection box, switch door, metal filter, dust cleaning mechanism, switch mechanism and fan blade, it solves the problem of dust escaping from the charging trolley pipe opening; the metal filter combined with intermittent impact dust cleaning and fan blade auxiliary blowing reduces the clogging and wear of the filter material, and at the same time reduces the occurrence of secondary dust. Meanwhile, the dual-axis motor integrates the fan blade negative pressure dust collection, impact rod dust cleaning and switch door opening and closing, realizing the coordination of multiple mechanisms, without the need for an additional power source, greatly improving the operation efficiency and operational stability, and is suitable for the harsh working environment of mines. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency pulse-type dust cleaning and collection device for a loading trolley proposed in this invention. Figure 2This is a side sectional view of a high-efficiency pulse-type dust cleaning and collection device for a drug loading trolley proposed in this invention; Figure 3 This is a schematic diagram of the semi-threaded rod in a high-efficiency pulse dust cleaning and collection device for a drug loading trolley proposed in this invention; Figure 4 This is a schematic diagram of the impact rod in a high-efficiency pulse dust cleaning and collection device for a drug loading trolley proposed in this invention. Figure 5 This is a cross-sectional view of the dust collection channel location in a high-efficiency pulse-type dust cleaning and collection device for a drug loading trolley proposed in this invention. Figure 6 This invention proposes a high-efficiency pulse-type dust cleaning and collection device for a drug loading trolley. Figure 5 Enlarged view of point A in the middle; Figure 7 This is a schematic diagram of the internal structure of the transmission amplifier box in a high-efficiency pulse dust cleaning and collection device for a drug loading trolley proposed in this invention.

[0018] In the diagram: 1. Dust collection hood; 2. Placement port; 3. Pulse valve; 4. Dust collection pipe; 5. Dust collection box; 6. Dust collection channel; 7. Dust collection chamber; 8. Switch door panel; 9. Metal filter screen; 10. Fan blade; 11. Impact rod; 12. Dual-axis motor; 13. Semi-threaded rod; 14. Notch; 15. Reduction gearbox; 16. Bevel gear No. 1; 17. Bevel gear No. 2; 18. Bevel gear No. 3; 19. Torsion spring; 20. Vertical rod; 21. Guide wheel No. 1; 22. Transmission amplifier box; 23. Guide wheel No. 2; 24. Traction rope; 25. Guide wheel No. 3; 26. Switch rope; 27. Slide; 28. Moving guide wheel; 29. ​​Fixed guide wheel; 30. Cross silicone valve. Detailed Implementation

[0019] Reference Figures 1-7This invention proposes a high-efficiency pulse-type dust cleaning and collection device for a propellant loading trolley, including a dust collection hood 1. The dust collection hood 1 adopts a trumpet-shaped structure, and its opening edge is designed with a flexible sealing edge, which can closely fit the rock wall around the blast hole or the outer wall of the propellant loading trolley pipe opening, minimizing the installation gap. A placement port 2 is provided through the dust collection hood 1. The inner diameter of the placement port 2 is adapted to the outer diameter of the propellant delivery pipeline, and the hole wall is provided with an elastic sealing ring, which not only ensures the smooth passage of the propellant pipeline, but also seals the annular gap between the pipeline and the placement port 2, preventing dust from escaping from the gap. This solves the defects of poor compatibility and inadequate sealing of traditional dust collection hoods and pipelines. A pulse valve 3 is installed on the dust collection hood 1. The pulse valve 3 adopts electromagnetic pulse control, and its pulse frequency can be adaptively adjusted according to the fluctuation of the propellant pressure (within the range of 0.4-0.8MPa ±0.02MPa fluctuation). When the propellant pressure suddenly... When the change causes a surge in dust generation, the pulse valve 3 can instantly increase the intensity of the pulse airflow (pulse pressure can reach 0.6-1.0MPa), forming a directional airflow barrier. This forces the suspended dust cloud around the pipe opening into the dust collection hood 1 (a miniature pressure sensor (model: PT124G-111, measurement range 0-1.0MPa) is embedded in the inner wall of the placement port 2 of the dust collection hood 1. The sensor is electrically connected to the controller of the pulse valve 3. When the pressure fluctuation in the charging pipeline exceeds ±0.02MPa, the sensor provides real-time feedback, and the controller automatically adjusts the opening and closing frequency of the pulse valve 3 (the greater the fluctuation, the higher the pulse frequency, up to 10 times / minute), ensuring that the directional airflow accurately suppresses dust diffusion). This effectively suppresses the problem of dust diffusion carried by high-speed airflow. Compared with traditional continuous adsorption, pulsed airflow can more effectively impact the turbulent field (turbulent root mean square velocity 1.1-6).To prevent dust particles from spreading widely due to airflow disturbance, the bottom of the dust collection hood 1 is connected to a dust collection pipe 4. The dust collection pipe 4 is arranged at an angle (30-45° with the horizontal direction) to assist in the transport of dust by gravity, reducing dust deposition inside the pipe. One end of the dust collection pipe 4 is connected to a dust collection box 5 (the dust collection chamber 7 of the dust collection box 5 has a drawer-type dust collection box at the bottom; the dust collection box is made of stainless steel and is sealed to the inner wall of the dust collection chamber 7 with a sealing strip, and the top is equipped with a dust guide slope). (The dust is guided to fall by a plate). One side of the dust collection box extends to the outside of the dust collection chamber 5, and an end cap with a sealing latch is installed at the end. After a certain amount of dust collection operation (every 8 hours), the dual-shaft motor 12 and pulse valve 3 are turned off, the end cap latch is unlocked, and the dust collection box can be pulled out to clean the internal dust. After cleaning, the dust collection box is pushed back to its original position, and the sealing latch automatically locks to prevent dust leakage. The dust collection chamber 5 has a dust collection channel 6 and a dust collection chamber 7. The connection between the dust collection channel 6 and the dust collection pipe 4 adopts a gradually expanding structure to reduce dust accumulation. The dust collection box 5 has a low airflow velocity to prevent secondary dust re-entrainment caused by high-speed airflow. It features a dust collection port connecting the dust collection channel 6 and the dust collection chamber 7. A rotatable door plate 8 is installed inside the dust collection port. The door plate 8 can seal the dust collection port. When the device is not in operation or during dust cleaning, the door plate 8 closes to prevent dust in the dust collection chamber 7 from flowing back into the dust collection channel 6, thus avoiding secondary dust pollution and slowing down dust backflow. A metal filter screen 9 with a multi-layered mesh structure is installed inside the dust collection channel 6. With an aperture of 50-100μm, it effectively intercepts fine dust particles while ensuring smooth airflow. The dust collection box 5 is equipped with a dust cleaning mechanism and a switching mechanism. The dust cleaning mechanism cleans the dust on the metal filter screen 9, and the switching mechanism opens and closes the door panel 8. A fan blade 10 is rotatably installed inside the dust collection channel 6. The rapid rotation of the fan blade 10 draws dust from the dust collection hood 1 and filters it through the metal filter screen 9. No manual cleaning of the filter material is required, improving operational efficiency and ensuring dust collection.

[0020] like Figure 2 , Figure 4 and Figure 5As shown, the dust removal mechanism includes an impact rod 11 and a drive assembly. The impact rod 11 is slidably installed in the dust collection channel 6, and the end of the impact rod 11 can slide and impact the metal filter screen 9 (the distance between the impact rod 11 and the metal filter screen 9 is 5-15mm). The drive assembly is used to drive the impact rod 11 to slide away from the metal filter screen 9 in the dust collection channel 6. When the switch door 8 is closed, it can drive the impact rod 11 to slide back and impact the metal filter screen 9. In actual use, the end of the impact rod 11 is fitted with an elastic buffer sleeve to avoid damage to the metal filter screen 9 by hard impact. The end of the impact rod 11 can slide and impact the metal filter screen 9. The vibration wave generated by the mechanical impact shakes off the stubborn dust adhering to the pores of the metal filter screen 9. Compared with the traditional airflow backflushing dust removal, the impact dust removal can more thoroughly clean the deep dust of the metal filter screen 9, prevent the airflow obstruction caused by the blockage of the filter screen pores, and solve the problem of reduced dust collection efficiency after the blockage of traditional dust filter elements.

[0021] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the drive assembly includes a dual-axis motor 12, a semi-threaded rod 13, and a reducer. The dual-axis motor 12 is waterproof and dustproof, adaptable to the harsh environment of mining operations. The dual-axis motor 12 is installed inside the dust collection channel 6. The reducer is installed between one end of the semi-threaded rod 13 and one of the output shafts of the dual-axis motor 12. The impact rod 11 has teeth, and the threads on the semi-threaded rod 13 mesh with the teeth on the impact rod 11. The threaded section of the semi-threaded rod 13 has a notch 14. In actual use, when the semi-threaded rod 13 rotates, the threads... The teeth of the impact rod 11 engage with the grooves, causing the impact rod 11 to slide away from the metal filter screen 9. When the notch 14 rotates to the position corresponding to the teeth, the engagement is released, and the impact rod 11 slides back to impact the metal filter screen 9. Subsequently, it resets under the linkage of the subsequent structure. Through the special structural design of the semi-threaded rod 13 and the engagement of the teeth on the impact rod 11, the impact rod 11 can achieve intermittent impact, thereby ensuring continuous dust removal of the metal filter screen 9, ensuring the removal of dust adhering to the metal filter screen 9, and ensuring the filtration effect.

[0022] like Figure 2 , Figure 5 and Figure 6As shown, the speed reduction component includes a speed reduction box 15, a first bevel gear 16, a second bevel gear 17, and a third bevel gear 18. The speed reduction box 15 is installed inside the dust collection channel 6. The first bevel gear 16 is rotatably installed inside the speed reduction box 15 and is mounted on one of the output shafts of the dual-axis motor 12. The second bevel gear 17 is rotatably installed inside the speed reduction box 15 and meshes with the first bevel gear 16. The third bevel gear 18 is rotatably installed inside the speed reduction box 15 and is connected to the end of the semi-threaded rod 13. The third bevel gear 18 meshes with the second bevel gear 17. In actual use, the transmission ratio of the bevel gear set is 3:1-5:1. Through multi-stage bevel gear speed reduction, the high-speed rotation of the dual-axis motor 12 is converted into the low-speed rotation of the semi-threaded rod 13, changing the direction of power transmission, thereby driving the sliding of the impact rod 11.

[0023] like Figure 5 As shown, the switching mechanism includes a torsion spring 19 and an amplifying switch assembly. The switch door plate 8 is rotatably mounted inside the dust collection port via a rotating shaft. The torsion spring 19 is fitted onto the rotating shaft of the switch door plate 8. The amplifying switch assembly is used to amplify the sliding displacement of the impact rod 11 and convert it into the rotation angle of the switch door plate 8. When the switch door plate 8 rotates to close, it can also drive the impact rod 11 to slide back and impact the metal filter screen 9. In actual use, the torsion spring 19 is initially in a stored state, always applying a torque in the closing direction to the switch door plate 8 to ensure that the switch door plate 8 tightly seals the dust collection port in the non-dust collection state, preventing dust from flowing back into the dust collection chamber 7. When the amplifying switch assembly is activated, it overcomes the elasticity of the torsion spring 19 to open the switch door plate 8, realizing the conveying of dust to the dust collection chamber 7. The setting of the torsion spring 19 ensures the sealing of the switch door plate 8 when closed, avoiding dust leakage.

[0024] like Figure 5 , Figure 6 and Figure 7As shown, the amplification switch assembly includes a vertical rod 20, a first guide wheel 21, a transmission amplification box 22, a second guide wheel 23, a traction rope 24, a third guide wheel 25, a switch rope 26, and an amplification component. The vertical rod 20 is fixedly connected to the impact rod 11. The first guide wheel 21 is rotatably installed in the dust collection channel 6. The transmission amplification box 22 is fixedly installed in the dust collection chamber 7, and a working chamber is opened inside the transmission amplification box 22. The second guide wheel 23 is rotatably installed in the working chamber. One end of the traction rope 24 is fixedly connected to the vertical rod 20. The traction rope 24 passes sequentially around the first guide wheel 21, the second guide wheel 23, and the third guide wheel 25, which is rotatably installed in the working chamber. One end of the switch rope 26 is connected to the switch door panel 8. The switch rope 26 passes around the third guide wheel 25. The amplifying component is used to amplify the sliding displacement of the traction rope 24 and convert it into the sliding displacement of the switch rope 26. In actual use, the pull directions of the traction rope 24 and the switch rope 26 are guided by several guide wheels to reduce the friction loss of the rope, ensure smooth transmission of tension, and reduce jamming.

[0025] like Figure 7 As shown, the amplification component includes a slide 27, moving guide wheels 28, and fixed guide wheels 29. The slide 27 is slidably installed in the working chamber. The end of the traction rope 24 away from the vertical rod 20 is connected to the slide 27. There are multiple moving guide wheels 28, all of which are rotatably installed on the slide 27. There are also multiple fixed guide wheels 29, all of which are rotatably installed in the working chamber. The other end of the switch rope 26 passes around the multiple moving guide wheels 28 and the multiple fixed guide wheels 29 in sequence and is connected to the inner wall of the working chamber. In actual use, the switch rope 26, the multiple moving guide wheels 28, and the multiple fixed guide wheels 29 cooperate to form a pulley group amplification structure. When the impact rod 11 causes the vertical rod 20 to produce a small displacement, the traction rope 24 pulls the slide 27 to slide. After being amplified by the pulley group, the switch rope 26 can produce a sufficiently large displacement, causing the switch door panel 8 to achieve a 90° angle. ° When fully open (the distance between the impact rod 11 and the metal filter 9 is small, the stroke of the impact rod 11 from disengagement to impacting the metal filter 9 is short, the inertial loss is small, and the impact force can be transmitted to the metal filter 9 more directly, forming a stronger vibration wave, which can effectively shake off the fine dust (50-100μm) and tightly adhered stubborn dust in the pores of the metal filter 9. Especially for the dust of explosives in mines (which is easily compacted on the surface of the metal filter 9 due to air pressure fluctuations), the short-distance impact can avoid the "impact weakness" caused by energy attenuation, reduce the risk of pore blockage of the metal filter 9, ensure the stability of the ventilation cross-sectional area of ​​the dust collection channel 6, and shorten the cycle. The impact frequency can be increased to 3-5 times / minute, which can clean up the new dust in time, avoid the accumulation of dust to form a "filter cake", further reduce the probability of blockage of the metal filter 9, and is suitable for the scenario of continuous dust generation in the charge operation).

[0026] like Figure 2 and Figure 5As shown, the fan blade 10 is mounted on the other output shaft of the dual-axis motor 12. In actual use, the dual-axis motor 12 simultaneously drives the fan blade 10 to rotate and the semi-threaded rod 13 to rotate, realizing the synchronous linkage of dust collection airflow generation and dust removal action. No additional power source is required, simplifying the device structure and reducing energy consumption. The rotation speed of the fan blade 10 and the semi-threaded rod 13 is matched by a speed reducer to ensure that the negative pressure airflow generated by the fan blade 10 and the impact frequency of the impact rod 11 are coordinated. When the rotation speed of the fan blade 10 increases and the adsorption force is enhanced, the impact frequency of the impact rod 11 increases synchronously, timely cleaning more dust adhering to the filter screen surface due to the enhanced airflow, ensuring the stability of the ventilation cross-sectional area of ​​the dust collection channel 6, and avoiding the increase of airflow resistance.

[0027] like Figure 1 and Figure 2 As shown, the dust collection hood 1 has a pressure relief port, and a protective component is installed inside the pressure relief port. The protective component is used to slow down the dust overflow and ensure that outside air enters the dust collection hood 1. The protective component includes a cross silicone valve 30. The cross silicone valve 30 adopts an integrally molded silicone structure. In its natural state, the cross gap is closed. The cross silicone valve 30 is installed inside the pressure relief port. In actual use, when negative pressure is generated inside the dust collection hood 1 due to the action of the pulse valve 3 or the adsorption of the fan blade 10, outside air can open the cross gap and enter the dust collection hood 1 to balance the air pressure inside the hood. This avoids the obstruction of explosive delivery in the charging pipeline due to excessive negative pressure, thus solving the problem of negative pressure interfering with the charging operation of traditional dust collection devices. When the air pressure inside the dust collection hood 1 returns to normal, the cross silicone valve 30 closes under its own elasticity to prevent dust from overflowing from the pressure relief port. At the same time, the silicone material has good sealing and wear resistance, which can meet the frequent opening and closing requirements of mining operations.

[0028] Specific workflow: Preparation stage: Pass the charge delivery pipeline through the placement port 2 of the dust collection hood 1 (the elastic sealing ring is fitted to the outer wall of the pipeline for sealing), and the flexible sealing edge of the dust collection hood 1 is tightly fitted to the rock wall around the blast hole; open the sealing lock of the dust collection box at the bottom of the dust collection box 5, confirm that the dust collection box is installed in place and locked; start the dual-axis motor 12 to preheat, and the pressure sensor enters the working state.

[0029] Dust collection stage: After the charging operation is started, compressed air drives the explosive particles into the borehole through the conveying pipeline. When the pressure sensor detects a pipeline pressure fluctuation of ≥±0.02MPa, the pulse valve 3 controller receives the signal and adjusts the pulse frequency (3-10 times / minute) to spray a pulse airflow of 0.6-1.0MPa into the dust collection hood 1, forcibly pressing the dust escaping from the pipe opening towards the dust collection pipe 4 (an inclined arrangement to assist in gravity conveying of dust). At the same time, the dual-shaft motor 12 drives the fan blade 10 to rotate at high speed, forming a negative pressure (negative pressure value -0.03~-0.05MPa) in the dust collection channel 6, accelerating the dust to enter the dust collection channel 6 through the dust collection pipe 4. The metal filter screen 9 (50-100μm) intercepts the dust particles, and the clean airflow passes through the filter screen and is discharged, realizing gas-solid separation.

[0030] Dust removal and dust collection linkage stage: The other output shaft of the dual-axis motor 12 drives the semi-threaded rod 13 to rotate at low speed through a reduction component (transmission ratio 3:1-5:1). The threaded section of the semi-threaded rod 13 meshes with the teeth of the impact rod 11, causing the impact rod 11 to slide along the slide rail away from the metal filter screen 9 (sliding distance 5-15mm). The vertical rod 20 moves synchronously with the impact rod 11, pulling the traction rope 24. After being guided by the first guide wheel 21 and the second guide wheel 23, the traction carriage 27 slides in the transmission amplification box 22. The moving guide wheel 28 moves with the carriage 27, amplifying the displacement through the pulley group. The switch rope 26 overcomes the elastic force of the torsion spring 19 and pulls the switch door plate 8 to rotate and open (maximum opening angle 90°). The dust collection channel 6 is connected to the dust collection chamber 7. The intercepted dust falls into the dust collection box under the assistance of gravity and airflow.

[0031] Reset phase: When the notch 14 of the semi-threaded rod 13 rotates to the position corresponding to the teeth of the impact rod 11, the engagement is released; at this time, the reset force of the torsion spring 19 drives the switch door plate 8 to rotate in the opposite direction to close. The switch door plate 8 pulls the switch rope 26, which is guided by the third guide wheel 25 and then transmits the pulling force in the opposite direction through the pulley group, pushing the slide 27 to reset, and then pulling the traction rope 24 and the vertical rod 20, causing the impact rod 11 to slide towards the metal filter screen 9 and hit the metal filter screen 9, shaking off the stubborn dust in the pores of the metal filter screen 9. The dust falls onto the switch door plate 8 until the teeth engage with the threaded section of the semi-threaded rod 13 again, driving the impact rod 11 away from the metal filter screen 9 and opening the switch door plate 8. The dust falls into the dust collection chamber 7, completing one cycle.

[0032] Shutdown and cleaning phase: After the loading operation is completed, run the device for 5 minutes (to remove residual dust), then turn off the dual-shaft motor 12 and pulse valve 3; unlock the dust collection box end cover, pull out the dust collection box to clean the dust, and after cleaning, reset the dust collection box and lock it, waiting for the next operation.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A high-efficiency pulse-type dust cleaning and collection device for a drug loading trolley, characterized in that, Includes a dust collection hood (1), with a placement opening (2) through it, a pulse valve (3) installed on the dust collection hood (1), a dust collection pipe (4) connected to the bottom of the dust collection hood (1), a dust collection box (5) connected to one end of the dust collection pipe (4), a dust collection channel (6) and a dust collection chamber (7) opened inside the dust collection box (5), a dust collection port connected to the dust collection channel (6) and the dust collection chamber (7) opened on the dust collection box (5), and a switch door plate (8) rotatably installed inside the dust collection port, the switch door plate (8) being able to block the dust collection port; A metal filter screen (9) is installed in the dust collection channel (6), and a dust cleaning mechanism and a switching mechanism are installed on the dust collection box (5). The dust cleaning mechanism is used to clean the dust on the metal filter screen (9), and the switching mechanism is used to open and close the door panel (8). A fan blade (10) is rotatably installed inside the dust collection channel (6).

2. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 1, characterized in that, The dust removal mechanism includes an impact rod (11) and a drive assembly; the impact rod (11) is slidably installed in the dust collection channel (6), and the end of the impact rod (11) can slide to impact the metal filter screen (9); The drive assembly is used to drive the impact rod (11) to slide away from the metal filter screen (9) within the dust collection channel (6); When the switch door panel (8) is closed, it can drive the impact rod (11) to slide back and impact the metal filter (9).

3. The high-efficiency pulse-type dust cleaning and collection device for a loading trolley according to claim 2, characterized in that, The drive assembly includes a dual-axis motor (12), a semi-threaded rod (13), and a reducer; the dual-axis motor (12) is installed in the dust collection channel (6), the reducer is installed between one end of the semi-threaded rod (13) and one of the output shafts of the dual-axis motor (12), the impact rod (11) is provided with teeth, the thread on the semi-threaded rod (13) meshes with the teeth on the impact rod (11), and the threaded section of the semi-threaded rod (13) is provided with a notch (14).

4. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 3, characterized in that, The speed reduction component includes a speed reduction box (15), a first bevel gear (16), a second bevel gear (17), and a third bevel gear (18). The speed reduction box (15) is installed in the dust collection channel (6). The first bevel gear (16) is rotatably installed in the speed reduction box (15) and is installed on one of the output shafts of the dual-shaft motor (12). The second bevel gear (17) is rotatably installed in the speed reduction box (15) and meshes with the first bevel gear (16). The third bevel gear (18) is rotatably installed in the speed reduction box (15) and is connected to the end of the semi-threaded rod (13). The third bevel gear (18) meshes with the second bevel gear (17).

5. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 4, characterized in that, The switching mechanism includes a torsion spring (19) and an amplifying switch assembly; the switch door (8) is rotatably mounted inside the dust collection port via a rotating shaft, and the torsion spring (19) is fitted onto the rotating shaft of the switch door (8); The amplification switch assembly is used to amplify the sliding displacement of the impact rod (11) and convert it into the rotation angle of the switch door plate (8). When the switch door plate (8) rotates to close, it can also drive the impact rod (11) to slide back and impact the metal filter screen (9).

6. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 5, characterized in that, The amplification switch assembly includes a vertical rod (20), a first guide wheel (21), a transmission amplification box (22), a second guide wheel (23), a traction rope (24), a third guide wheel (25), a switch rope (26), and an amplification component; the vertical rod (20) is fixedly connected to the impact rod (11), the first guide wheel (21) is rotatably installed in the dust collection channel (6), the transmission amplification box (22) is fixedly installed in the dust collection chamber (7), the transmission amplification box (22) has a working chamber, the second guide wheel (23) is rotatably installed in the working chamber, one end of the traction rope (24) is fixedly connected to the vertical rod (20), the traction rope (24) passes around the first guide wheel (21) and the second guide wheel (23) in sequence, the third guide wheel (25) is rotatably installed in the working chamber, one end of the switch rope (26) is connected to the switch door panel (8), and the switch rope (26) passes around the third guide wheel (25). The amplifying element is used to amplify the sliding displacement of the traction rope (24) and convert it into the sliding displacement of the switch rope (26).

7. The high-efficiency pulse-type dust cleaning and collection device for a loading trolley according to claim 6, characterized in that, The enlarged component includes a slide (27), a moving guide wheel (28), and a fixed guide wheel (29). The slide (27) is slidably installed in the working chamber. The end of the traction rope (24) away from the vertical rod (20) is connected to the slide (27). There are multiple moving guide wheels (28), and all of the multiple moving guide wheels (28) are rotatably installed on the slide (27). There are multiple fixed guide wheels (29), and all of the multiple moving guide wheels (28) are rotatably installed in the working chamber. The other end of the switch rope (26) passes around the multiple moving guide wheels (28) and the multiple fixed guide wheels (29) in sequence and is connected to the inner wall of the working chamber.

8. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 1, characterized in that, The fan blade (10) is mounted on the other output shaft of the dual-axis motor (12).

9. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 1, characterized in that, The dust collection hood (1) is provided with a pressure relief port, and a protective component is installed inside the pressure relief port. The protective component is used to slow down the overflow of dust and ensure that outside air enters the dust collection hood (1).

10. The high-efficiency pulse-type dust cleaning and collection device for a charging trolley according to claim 1, characterized in that, The protective component includes a cross-shaped silicone valve (30); the cross-shaped silicone valve (30) is installed inside the pressure relief port.

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