A laser cutting waste gas treatment system and process based on an electric energy metering box production

Abstract

This invention relates to the field of waste gas treatment technology, and discloses a laser cutting waste gas treatment system and process based on an energy metering box. The system includes a cartridge dust collector body and a treatment box connected to the top surface of the cartridge dust collector body. A base plate is fixedly connected to the lower end of the treatment box, and an annular filter element is rotatably connected between the top surface of the base plate and the treatment box. A conical hood is fixedly connected inside the annular filter element, and a cleaning component is fixedly connected to the top surface of the base plate. After the waste gas enters the treatment box, the conical hood and the annular filter element work together to initially intercept large metal debris. The intercepted large metal debris is then directly discharged to the dust accumulation area of ​​the cartridge dust collector body through the cooperation of the suction pipe and the cleaning component. This avoids damage and clogging of the filter material by metal debris, extends the service life of the filter material, and reduces equipment downtime and filter cleaning frequency.

Description

Technical Field

[0001] This invention relates to the field of waste gas treatment technology, and in particular to a laser cutting waste gas treatment system and process based on an electricity metering box. Background Technology

[0002] In the production of electricity metering boxes, laser cutting is the core technology for achieving high-precision processing of metal sheets, but the process is accompanied by exhaust gas emissions. Specifically, when cutting metal, the high temperature causes the material to partially melt and oxidize, producing dust particles containing metal oxides. If the exhaust gas is directly emitted, it will not only pollute the atmospheric environment but also endanger the health of workshop operators.

[0003] Laser cutting exhaust gas treatment systems offer comprehensive treatment from source control to end-of-pipe purification, achieving the dual goals of environmental protection and occupational health while ensuring production precision. The exhaust gas treatment system mainly includes exhaust gas capture, exhaust gas purification, and gas purification. Among these, cartridge dust collectors are currently the preferred and standard configuration for exhaust gas purification. Dust-laden exhaust gas enters the dust collector and passes through pleated filter cartridges made of high-efficiency filter media. Particulate matter is trapped on the surface of the filter cartridges, while clean air passes through and is discharged.

[0004] However, during the laser cutting process, metal sheets will produce metal particles of different sizes. Larger particles will directly impact the surface of the filter material with the airflow, and will continuously rub against the filter material. On the one hand, this will easily damage the PTFE film on the surface of the filter material. Once the film is worn through, its high-efficiency filtration characteristics will be lost, resulting in a sharp drop in filtration efficiency. On the other hand, it will easily generate a large amount of static charge, and the static force will attract dust, accelerate the clogging speed of the filter material, increase the downtime for maintenance, and make subsequent dust removal more difficult. Summary of the Invention

[0005] In view of the problems of existing technology, such as large metal debris damaging the PTFE membrane of the filter material and aggravating filter material clogging, a laser cutting exhaust gas treatment system based on an energy metering box is proposed.

[0006] The purpose is to install an interception mechanism at the air inlet of the cartridge dust collector to preferentially intercept and filter large metal debris, and discharge it directly to the dust storage area of ​​the cartridge dust collector, thereby reducing the filtration pressure on the filter media and reducing damage to the filter media.

[0007] The technical solution of this invention is a laser cutting exhaust gas treatment system based on an electricity metering box, including a cartridge dust collector body with an open top surface, and a treatment box communicating with the top surface of the cartridge dust collector body. An air inlet pipe is connected to the top surface of the treatment box. A base plate is fixedly connected to the lower end of the treatment box. An annular filter element is rotatably connected between the top surface of the base plate and the treatment box. A conical hood is fixedly connected inside the annular filter element, and the bottom surface of the conical hood is rotatably connected to the base plate. A cleaning component is fixedly connected to the top surface of the base plate, and the cleaning component is used to clean the inner wall of the annular filter element and the surface of the conical hood.

[0008] The annular filter element includes a filter ring made of sintered metal powder. Both the upper and lower ends of the filter ring are fixedly connected to a fixing ring. The upper fixing ring is rotatably connected to the processing box, and the lower fixing ring is rotatably connected to the base plate.

[0009] Furthermore, the cleaning assembly includes a protective cover fixedly connected to the base plate, the opening side of the protective cover facing the inner wall of the filter ring, a first cleaning brush fixedly connected inside the protective cover, the first cleaning brush rubbing against the inner wall of the filter ring, and a second cleaning brush fixedly connected to the side of the protective cover facing the conical cover, the second cleaning brush rubbing against the conical cover.

[0010] Furthermore, a dust collection cylinder rotatably connected to the base plate is provided below the protective cover. Multiple dust collection holes are provided on the top surface of the dust collection cylinder and on the base plate at positions corresponding to the top surface of the dust collection cylinder. A motor is fixedly installed on the outer wall of the processing box. The motor is drivenly connected to the dust collection cylinder. A transmission component is connected between the dust collection cylinder and the annular filter element. The lower end of the dust collection cylinder extends into the body of the cartridge dust collector and is fixedly connected to a negative pressure pipe. A negative pressure hole is provided on the side wall of the negative pressure pipe. A dust discharge pipe is fixedly connected to the lower end of the negative pressure pipe. The lower end of the dust discharge pipe extends above the dust accumulation area of ​​the body of the cartridge dust collector.

[0011] Furthermore, an arc-shaped plate is provided on the outer side of the annular filter element, the arc-shaped plate is connected and fixed to the base plate, and the arc-shaped plate is provided corresponding to the protective cover.

[0012] Furthermore, the transmission component includes an outer toothed ring fixedly sleeved on the upper end of the outer wall of the dust collection cylinder, and an inner toothed ring fixedly connected to the inner wall of the lower fixed ring, wherein the outer toothed ring and the inner toothed ring are meshed together.

[0013] Furthermore, a support ring is rotatably sleeved on the outer wall of the negative pressure pipe, the support ring is connected and fixed to the inner wall of the filter cartridge dust collector body, and a through hole adapted to the negative pressure hole is opened on the support ring;

[0014] The diameter of the negative pressure pipe is larger than the diameter of the dust collection cylinder and the dust discharge pipe.

[0015] Furthermore, the lower end of the protective cover is open, and a triangular block is fixedly connected to the side of the lower end of the protective cover facing the inner wall of the annular filter element. A baffle is hinged to the lower end of the protective cover, and the two ends of the baffle are respectively in contact with the inclined surface of the triangular block and the inner wall of the protective cover.

[0016] The upper end of the vacuum cleaner is vertically slidably connected to a top rod, which is located on the lower side of the baffle and is fixedly connected to an annular plate. An arc-shaped strip is fixedly connected to the inner side of the lower fixed ring, and one end of the arc-shaped strip has an inclined surface.

[0017] Furthermore, a scraper is slidably sleeved on the top rod, and the scraper makes frictional contact with the top surface of the bottom plate.

[0018] Another objective of this invention is to provide a laser cutting exhaust gas treatment process based on the production of an energy metering box. The purpose of this process is to preferentially filter large metal debris in the exhaust gas, thereby avoiding accelerated wear and clogging of subsequent filter media and improving filtration effect and efficiency.

[0019] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting exhaust gas treatment process based on the production of an electricity metering box, comprising the following steps:

[0020] S1. Waste gas capture: When laser cutting the metal sheet of the power metering box, the negative pressure equipment creates negative pressure inside the capture hood, which transports the metal dust waste gas generated during cutting to the treatment box. An airflow stabilizer is installed in the middle of the pipeline to adjust the airflow speed and keep it stable.

[0021] S2. Exhaust gas purification: Large particles of hot metal debris are intercepted by the annular filter element. The cleaning component directly transports the intercepted large particles of hot metal debris to the dust storage area of ​​the cartridge dust collector body through the dust collection cylinder. Fine dust passes through the annular filter element and enters the cartridge dust collector body. The non-woven filter bag filters the fine dust, and then the exhaust gas is discharged.

[0022] S3, Deep Purification: The waste gas after dust filtration passes through an adsorption bed filled with a large amount of activated carbon, which adsorbs organic molecules and some ozone in the waste gas, and then further decomposes the organic waste gas through photo-oxidation catalysis or catalytic combustion equipment.

[0023] S4. Clean gas is transported through pipelines to an online monitoring device to detect particulate matter concentration in real time. Once the concentration is deemed acceptable, the gas is released into the atmosphere.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. After the exhaust gas enters the treatment chamber, the large metal debris particles can be initially intercepted by the combination of the conical hood and the annular filter element. Then, the intercepted large metal debris particles are directly discharged to the dust storage area of ​​the cartridge dust collector body through the dust suction pipe and cleaning components. This avoids damage and blockage of the filter material by metal debris, extends the service life of the filter material, and reduces the frequency of equipment downtime and filter material cleaning.

[0026] 2. The baffle and triangular block work together to seal the lower port of the protective cover, preventing the inside of the protective cover from being affected by airflow and improving the cleaning effect of the cleaning brush on the filter rings. At the same time, the arc strip and the ring plate work together to release debris in a timely and quantitative manner, ensuring that the debris falls precisely to the vicinity of the suction hole on the bottom plate, thereby improving the subsequent suction efficiency.

[0027] 3. The scraper rotates synchronously with the top rod, which actively collects debris from the bottom plate surface. This solves the problem of dust leakage caused by debris dispersion and improves the coverage and suction efficiency of a single vacuuming operation. Attached Figure Description

[0028] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0029] Figure 2 This is a schematic diagram of the bottom of the treatment box structure of the laser cutting exhaust gas treatment system based on the power metering box of the present invention;

[0030] Figure 3 This is a schematic diagram of the internal structure of the treatment box of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0031] Figure 4 This is a cross-sectional schematic diagram of the base plate, annular filter element, and conical hood structure of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0032] Figure 5 This is a structural disassembly diagram of the cleaning component and annular filter element of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0033] Figure 6 This is a disassembly diagram of the support ring and negative pressure pipe structure of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0034] Figure 7 This is a schematic diagram of the dust collection cylinder and top rod structure of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0035] Figure 8 This is a schematic diagram of the motor and dust collection cylinder structure of the laser cutting exhaust gas treatment system based on the power metering box of the present invention.

[0036] In the picture:

[0037] 1. Cartridge dust collector body; 2. Processing box; 3. Air inlet pipe; 4. Base plate; 5. Annular filter element; 51. Filter ring; 52. Fixing ring; 6. Conical hood; 7. Cleaning assembly; 71. Protective cover; 72. Cleaning brush one; 73. Cleaning brush two; 8. Arc plate; 9. Motor; 10. Dust suction cylinder; 11. External toothed ring; 12. Internal toothed ring; 13. Negative pressure pipe; 14. Support ring; 15. Dust discharge pipe; 16. Triangular block; 17. Baffle; 18. Top rod; 19. Annular plate; 20. Arc strip; 21. Scraper. Detailed Implementation

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0039] Example 1, referring to Figures 1-6 This is the first embodiment of the present invention, which provides a laser cutting exhaust gas treatment system based on an electricity metering box. The system includes a cartridge dust collector body 1 with an open top surface, and a treatment box 2 connected to the top surface of the cartridge dust collector body 1. An air inlet pipe 3 is connected to the top surface of the treatment box 2. A base plate 4 is fixedly connected to the lower end of the treatment box 2. An annular filter element 5 is rotatably connected between the top surface of the base plate 4 and the treatment box 2. A conical hood 6 is fixedly connected inside the annular filter element 5, with its bottom surface rotatably connected to the base plate 4. A cleaning component 7 is fixedly connected to the top surface of the base plate 4. The cleaning component 7 is used to clean the inner wall of the annular filter element 5 and the surface of the conical hood 6. The annular filter element 5 includes a filter ring 51 sintered from metal powder. Fixed rings 52 are fixedly connected to both the upper and lower ends of the filter ring 51. The upper fixed ring 52 is rotatably connected to the treatment box 2, and the lower fixed ring 52 is rotatably connected to the base plate 4.

[0040] Specifically, the exhaust gas generated during laser cutting is captured and enters the treatment chamber 2 through the air inlet pipe 3. Under the action of the conical hood 6, the exhaust gas diffuses in a ring shape. Some large particles fall directly onto the conical hood 6, while the other part is intercepted by the inner side of the annular filter element 5. Fine particles pass through the airflow to the outer side of the annular filter element 5 and then enter the cartridge dust collector body 1. The filter material in the cartridge dust collector body 1 further filters the fine dust. Among them, the filter holes of the filter ring 51 are larger than the filter holes of the filter material. Fine dust can pass through the filter holes of the filter ring 51 with the airflow, while large particles are intercepted on the inner side of the filter ring 51. The filter ring 51 is made of sintered metal powder, and both the inner and outer sides are smoothed. It has high mechanical strength, high hardness, and is difficult to be damaged by sharp metal debris and cleaning components 7.

[0041] Understandably, since the internal cross-sectional area of ​​the annular filter element 5 is larger than that of the inlet pipe 3, the airflow velocity decreases after entering the annular filter element 5, thereby reducing the drag force of the airflow on the metal particles and debris. Under the action of gravity, the metal particles and debris fall onto the surface of the conical cover 6.

[0042] Understandably, sintered metal filter media performs surface filtration through its precisely controlled micropores, trapping dust particles primarily on the surface rather than penetrating the interior. This allows it to effectively remove trapped debris when used in conjunction with the cleaning component 7. Furthermore, the filter ring 51 itself is metal, meaning it is completely non-flammable and can directly withstand the high-temperature sparks and incandescent particles drawn in during laser cutting, fundamentally eliminating the risk of the filter element itself igniting.

[0043] Reference Figure 3 , Figure 5 The cleaning component 7 includes a protective cover 71 that is fixedly connected to the base plate 4. The opening side of the protective cover 71 is set facing the inner wall of the filter ring 51. A first cleaning brush 72 is fixedly connected inside the protective cover 71. The first cleaning brush 72 is in frictional contact with the inner wall of the filter ring 51. A second cleaning brush 73 is fixedly connected to the side of the protective cover 71 facing the conical cover 6. The second cleaning brush 73 is in frictional contact with the conical cover 6.

[0044] Specifically, the protective cover 71 effectively shields the working area of ​​the first cleaning brush 72, reducing the airflow speed in this area and preventing particles and debris from adhering firmly to the inner wall of the annular filter 5. When the annular filter 5 and the conical cover 6 rotate synchronously under the drive of the transmission component, the first cleaning brush 72 can smoothly sweep the debris attached to the inner wall of the annular filter 5 to the bottom of the protective cover 71, while the second cleaning brush 73 can sweep the debris settled on the surface of the conical cover 6 to the bottom of the protective cover 71. This design not only improves the cleaning efficiency of the first cleaning brush 72 and the second cleaning brush 73 through the shielding and speed reduction effect of the protective cover 71, but also temporarily receives and guides the swept debris, preventing the debris from being stirred up again and contaminating the filtration area. This further ensures the filtration permeability of the annular filter 5 and the airflow guiding effect of the conical cover 6, reducing the suction burden of the subsequent vacuuming cylinder 10.

[0045] Among them, the lower end of the cleaning brush 73 is positioned below the protective cover 71, and the top of the conical cover 6 is connected and fixed to the upper fixing ring 52 through the connecting bracket. When the conical cover 6 rotates, the debris on its surface is intercepted by the cleaning brush 73 and falls around the dust suction hole of the base plate 4.

[0046] Reference Figures 2-6Below the protective cover 71, there is a dust collection cylinder 10 that is rotatably connected to the base plate 4. Multiple dust collection holes are opened on the top surface of the dust collection cylinder 10 and on the base plate 4 at the corresponding positions of the top surface of the dust collection cylinder 10. A motor 9 is fixedly installed on the outer wall of the processing box 2. The motor 9 is connected to the dust collection cylinder 10 through a transmission. The dust collection cylinder 10 and the annular filter element 5 are connected through a transmission element. The lower end of the dust collection cylinder 10 extends into the body 1 of the cartridge dust collector and is fixedly connected to a negative pressure pipe 13. A negative pressure hole is opened on the side wall of the negative pressure pipe 13. The lower end of the negative pressure pipe 13 is fixedly connected to a dust discharge pipe 15. The lower end of the dust discharge pipe 15 extends above the dust accumulation area of ​​the body 1 of the cartridge dust collector.

[0047] Specifically, when the motor 9 drives the dust collection cylinder 10 to rotate, the dust collection cylinder 10 drives the annular filter element 5 and the conical cover 6 to rotate synchronously through the transmission component. The cleaning component 7 sweeps away the particles and debris on the inner wall of the annular filter element 5 and the conical cover 6. Subsequently, the negative pressure generated inside the filter cartridge dust collector body 1 acts on the inside of the dust collection cylinder 10 through the negative pressure pipe 13. When the dust collection hole of the dust collection cylinder 10 coincides with the dust collection hole of the bottom plate 4, the suction force transports the debris into the dust collection cylinder 10 and then to the dust accumulation area at the bottom of the filter cartridge dust collector body 1 through the dust discharge pipe 15. This system, through multi-stage filtration and synchronous cleaning and dust discharge design, not only improves the filtration efficiency of particles of different sizes in the exhaust gas, reduces damage and clogging to the filter material, extends the service life of the filter material, and reduces equipment downtime, but also avoids the annular filter element 5 and the conical cover 6 from being affected by debris accumulation, thus improving ventilation and filtration effects. At the same time, it achieves centralized collection and treatment of debris, reduces equipment maintenance frequency, and ensures long-term stable operation of the system.

[0048] Reference Figure 3 , Figure 5 An arc-shaped plate 8 is provided on the outer side of the annular filter element 5. The arc-shaped plate 8 is connected and fixed to the base plate 4, and the arc-shaped plate 8 is provided corresponding to the protective cover 71.

[0049] Specifically, the arc-shaped plate 8 has an arc-shaped groove on the side facing the annular filter 5 that matches the shape of the outer arc surface of the annular filter 5. The arc-shaped groove maintains a small gap with the outer wall of the annular filter 5. The core function of the arc-shaped plate 8 is to further reduce the suction force in its area. Through this design, the suction force on the part of the annular filter 5 located between the arc-shaped plate 8 and the protective cover 71 is greatly reduced, effectively avoiding the interference of suction force on the cleaning action of the cleaning brush 72. This allows the cleaning brush 72 to make more full contact with the inner wall of the annular filter 5 and scrape off the debris, significantly improving the cleaning effect of the cleaning brush 72 on the annular filter 5. At the same time, the small gap setting does not affect the normal rotation of the annular filter 5, and can accurately control the range of suction force reduction, ensuring the stability of filtration and dust collection functions in other areas of the system.

[0050] Reference Figure 4 , Figure 8The transmission component includes an outer toothed ring 11 fixedly sleeved on the upper end of the outer wall of the dust collection cylinder 10, and an inner toothed ring 12 fixedly connected to the inner wall of the lower fixing ring 52. The outer toothed ring 11 and the inner toothed ring 12 are meshed and connected.

[0051] Specifically, when the motor 9 drives the dust collection cylinder 10 to rotate, the outer toothed ring 11 and the inner toothed ring 12 cooperate to drive the lower fixed ring 52, causing the annular filter element 5 and the conical cover 6 to rotate.

[0052] Among them, the output end of the motor 9 and the outer wall of the dust collection cylinder 10 are both fixedly connected to pulleys, and a belt is connected between the two pulleys. The belt moves through the processing box 2.

[0053] Example 2, refer to Figure 6 , Figure 7 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a support ring 14 is rotatably sleeved on the outer wall of the negative pressure pipe 13, the support ring 14 is connected and fixed to the inner wall of the filter cartridge dust collector body 1, and a through hole adapted to the negative pressure hole is opened on the support ring 14; the diameter of the negative pressure pipe 13 is larger than the diameter of the dust collection cylinder 10 and the dust discharge pipe 15.

[0054] Specifically, when the negative pressure tube 13 rotates with the vacuum tube 10, causing the through hole on the support ring 14 to coincide with the negative pressure hole on the side wall of the negative pressure tube 13, the suction force inside the filter cartridge dust collector body 1 will act on the inside of the vacuum tube 10 through the through hole of the support ring 14 and the negative pressure hole of the negative pressure tube 13, so that a negative pressure is formed inside the vacuum tube 10. At this time, if the suction hole on the top surface of the vacuum tube 10 coincides with the suction hole on the bottom plate 4, the negative pressure can quickly adsorb the debris swept down by the cleaning component 7 around the suction hole of the bottom plate 4. After the debris is sucked into the vacuum tube 10, as the negative pressure tube 13 continues to rotate, the through hole of the support ring 14 and the negative pressure hole of the negative pressure tube 13 will gradually be misaligned, and the suction force will stop.

[0055] The design of the support ring 14 and the negative pressure pipe 13 generates intermittent suction. When suction is generated, it efficiently adsorbs debris at the top of the dust collection cylinder 10. When suction stops, debris inside the dust collection cylinder 10 can move downwards smoothly through the dust discharge pipe 15 (smaller in diameter than the negative pressure pipe 13) in a stable environment free from suction interference, relying on its own gravity and the pushing force of subsequent debris, and is finally transported to the dust storage area of ​​the filter cartridge dust collector body 1. This design, through precise control of intermittent suction, avoids the accumulation and blockage of debris in the dust collection cylinder 10 caused by continuous suction, while ensuring the suction strength during debris adsorption, improving adsorption efficiency, and ensuring stable downward movement of debris during transport, reducing jamming. This further optimizes the entire process from debris adsorption to centralized collection, ensuring the stable and reliable dust discharge function of the system. The remaining structure is the same as that in Embodiment 1.

[0056] Example 3, referring to Figure 5, Figure 7 , Figure 8 In the third embodiment of the present invention, the lower end of the protective cover 71 is open, and a triangular block 16 is fixedly connected to the side of the lower end of the protective cover 71 facing the inner wall of the annular filter element 5. A baffle 17 is hinged to the lower end of the protective cover 71, and the two ends of the baffle 17 abut against the inclined surface of the triangular block 16 and the inner wall of the protective cover 71, respectively. A top rod 18 is vertically slidably connected to the upper end of the dust collection cylinder 10. The top rod 18 is located below the baffle 17, and an annular plate 19 is fixedly connected to the top rod 18. An arc-shaped strip 20 is fixedly connected to the inner side of the lower fixing ring 52, and one end of the arc-shaped strip 20 has an inclined surface.

[0057] Specifically, the baffle 17 and the triangular block 16 work together to block the lower end of the protective cover 71, effectively preventing external airflow from entering the interior of the protective cover 71 and avoiding airflow interference with the cleaning operation. This allows the debris on the inner wall of the annular filter element 5 swept down by the cleaning brush 72 to fall stably and be temporarily stored in the groove formed by the baffle 17 and the triangular block 16. When the arc-shaped strip 20 rotates with the fixed ring 52 to contact the annular plate 19, it drives the top rod 18 to rise. The top rod 18 drives the baffle 17 to rotate, and the left end of the baffle 17 rotates downward and separates from the triangular block 16. The debris accumulated inside the protective cover 71 falls onto the bottom plate 4.

[0058] By leveraging the linkage of the arc-shaped strip 20, the ring plate 19, and the top rod 18, the debris is released in a timed and quantitative manner, ensuring that the debris falls precisely near the suction hole of the bottom plate 4, thereby improving the subsequent suction efficiency and further optimizing the continuous process of cleaning-temporary storage-release-collection, ensuring the system's efficient handling of debris.

[0059] Among them, reference Figure 5 The baffle 17 has a bent structure. A connecting shaft is fixedly connected to the bent part of the baffle 17. The connecting shaft is rotatably connected to the protective cover 71. The distance from the connecting shaft to the left end of the baffle 17 is less than the distance from the connecting shaft to the right end of the baffle 17. The weight of the right side of the baffle 17 is greater than that of the left side. When the baffle 17 is not subjected to external force, its right end abuts against the inner wall of the protective cover 71, and its left end contacts the inclined surface of the triangular block 16. When the push rod 18 rises and contacts the right side of the baffle 17, the baffle 17 rotates clockwise. The left end of the baffle 17 rotates downward and creates a gap with the triangular block 16.

[0060] Reference Figure 7 A scraper 21 is slidably sleeved on the top rod 18, and the scraper 21 makes frictional contact with the top surface of the bottom plate 4.

[0061] Specifically, when the top rod 18 rotates synchronously with the vacuum cleaner 10, it will drive the scraper 21 to rotate as well. The scraper 21 adopts an arc-shaped structure design. During the rotation, its arc-shaped surface can concentrate and scrape the debris scattered on the bottom plate 4 towards the direction of the top rod 18, so that the debris originally scattered on the surface of the bottom plate 4 gathers in the area near the suction hole of the vacuum cleaner 10. In this way, when the suction hole of the vacuum cleaner 10 coincides with the suction hole of the bottom plate 4 and negative pressure is generated, the concentrated debris can be sucked away more efficiently, avoiding the residue caused by the dispersion of debris.

[0062] By scraping the scraper 21 in an arc shape and rotating synchronously, the debris on the surface of the base plate 4 is actively collected. This not only solves the problem of dust leakage caused by debris dispersion, but also improves the coverage and suction efficiency of the vacuum cleaner 10 in a single vacuuming operation, further ensuring the cleaning effect of debris in the area of ​​the base plate 4 and reducing the interference of dust residue on subsequent filtration operations.

[0063] Among them, reference Figure 7 The top rod 18 has multiple grooves along its axial direction on its surface, and the scraper 21 and the upper part of the dust collection cylinder 10 are slidably engaged with these grooves. The rest of the structure is the same as that in Embodiment 2.

[0064] Based on embodiments 1-3, the working principle of this invention is as follows: Laser cutting exhaust gas enters the treatment chamber 2 through the inlet pipe 3 and diffuses in an annular manner under the guidance of the conical shroud 6. Due to the deceleration of the airflow inside the annular filter element 5, large particles of debris fall to the conical shroud 6, and some are intercepted by the inner side of the filter ring 51. Fine dust passes through the filter ring 51 and enters the main body 1 of the cartridge dust collector, where it is deeply filtered by the internal filter material. The motor 9 drives the dust collection cylinder 10 to rotate, and the outer toothed ring 11 meshes with the inner toothed ring 12, causing the annular filter element 5 and the conical shroud 6 to rotate synchronously. The cleaning brush 72 and the cleaning brush 73 clean the inner wall of the filter ring 51 and the cone cover 6 respectively. The debris inside the protective cover 71 is temporarily stored in the groove of the baffle 17 and the triangular block 16. The arc strip 20 pushes the top rod 18 to open the baffle 17 and release the debris. The scraper 21 rotates with the top rod 18 to collect the debris on the bottom plate 4. The negative pressure pipe 13 and the support ring 14 cooperate to generate intermittent negative pressure. When the suction holes of the dust collection cylinder 10 overlap, the debris is sucked up and discharged to the dust accumulation area through the dust discharge pipe 15, realizing efficient filtration and cleaning dust discharge.

[0065] Example 4, refer to Figures 1-8 The fourth embodiment of the present invention provides a laser cutting exhaust gas treatment process based on an electricity metering box, comprising the following steps:

[0066] S1. Waste gas capture: When laser cutting the metal sheet of the power metering box, the negative pressure device creates negative pressure inside the capture hood, and transports the metal dust waste gas generated during cutting to the treatment box 2. An airflow stabilizer is installed in the middle of the pipeline to adjust the airflow speed and keep it stable.

[0067] S2. Exhaust gas purification: Large particles of hot metal debris are intercepted by the annular filter element 5. The cleaning component 7 directly transports the intercepted large particles of hot metal debris to the dust storage area of ​​the cartridge dust collector body 1 through the dust collection cylinder 10. Fine dust passes through the annular filter element 5 and enters the cartridge dust collector body 1. The non-woven filter bag filters the fine dust and then discharges the exhaust gas.

[0068] S3, Deep Purification: The waste gas after dust filtration passes through an adsorption bed filled with a large amount of activated carbon, which adsorbs organic molecules and some ozone in the waste gas, and then further decomposes the organic waste gas through photo-oxidation catalysis or catalytic combustion equipment.

[0069] S4. Clean gas is transported through pipelines to an online monitoring device to detect particulate matter concentration in real time. Once the concentration is deemed acceptable, the gas is released into the atmosphere.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A laser cutting exhaust gas treatment system based on an electric energy metering box production, comprising a filter cartridge dust collector main body, the top surface of the filter cartridge dust collector main body is provided with an opening, characterized in that, It also includes a processing box that communicates with the top surface of the main body of the cartridge dust collector. An air inlet pipe is connected to the top surface of the processing box. A base plate is fixedly connected to the lower end of the processing box. An annular filter element is rotatably connected between the top surface of the base plate and the processing box. A conical hood is fixedly connected inside the annular filter element. The bottom surface of the conical hood is rotatably connected to the base plate. A cleaning component is fixedly connected to the top surface of the base plate. The cleaning component is used to clean the inner wall of the annular filter element and the surface of the conical hood. The annular filter element includes a filter ring made of sintered metal powder. Both the upper and lower ends of the filter ring are fixedly connected to a fixing ring. The upper fixing ring is rotatably connected to the processing box, and the lower fixing ring is rotatably connected to the bottom plate. The cleaning assembly includes a protective cover fixedly connected to the base plate. The opening of the protective cover faces the inner wall of the filter ring. A first cleaning brush is fixedly connected inside the protective cover and makes frictional contact with the inner wall of the filter ring. A second cleaning brush is fixedly connected to the side of the protective cover facing the conical cover and makes frictional contact with the conical cover. A vacuum cleaner cylinder rotatably connected to the base plate is located below the protective cover. Multiple suction holes are provided on the top surface of the vacuum cleaner cylinder and on the base plate at positions corresponding to the top surface of the vacuum cleaner cylinder. A motor is fixedly installed on the outer wall of the processing box and is drivenly connected to the vacuum cleaner cylinder. The dust collection cylinder and the annular filter element are connected by a transmission component. The lower end of the dust collection cylinder extends into the body of the cartridge dust collector and is fixedly connected to a negative pressure pipe. A negative pressure hole is opened on the side wall of the negative pressure pipe. A dust discharge pipe is fixedly connected to the lower end of the negative pressure pipe. The lower end of the dust discharge pipe extends to the dust accumulation area above the body of the cartridge dust collector. The lower end of the protective cover is open. A triangular block is fixedly connected to the side of the lower end of the protective cover facing the inner wall of the annular filter element. A baffle is hinged to the lower end of the protective cover. The two ends of the baffle are respectively in contact with the inclined surface of the triangular block and the inner wall of the protective cover. The upper end of the vacuum cleaner is vertically slidably connected to a top rod, which is located on the lower side of the baffle and is fixedly connected to an annular plate. An arc-shaped strip is fixedly connected to the inner side of the lower fixed ring, and one end of the arc-shaped strip has an inclined surface.

2. The laser cutting exhaust gas treatment system based on an electricity metering box as described in claim 1, characterized in that, An arc-shaped plate is provided on the outer side of the annular filter element. The arc-shaped plate is connected and fixed to the base plate, and the arc-shaped plate is provided with a protective cover.

3. The laser cutting exhaust gas treatment system based on an electricity metering box as described in claim 1, characterized in that, The transmission component includes an outer toothed ring fixedly sleeved on the upper end of the outer wall of the dust collection cylinder, and an inner toothed ring fixedly connected to the inner wall of the lower fixed ring, wherein the outer toothed ring and the inner toothed ring are meshed together.

4. The laser cutting exhaust gas treatment system based on an electricity metering box as described in claim 1, characterized in that, The outer wall of the negative pressure pipe is rotatably sleeved with a support ring, the support ring is connected and fixed to the inner wall of the filter cartridge dust collector body, and the support ring is provided with a through hole that matches the negative pressure hole. The diameter of the negative pressure pipe is larger than the diameter of the dust collection cylinder and the dust discharge pipe.

5. The laser cutting exhaust gas treatment system based on an electricity metering box as described in claim 1, characterized in that, A scraper is slidably sleeved on the top rod, and the scraper makes frictional contact with the top surface of the bottom plate.

6. A laser cutting exhaust gas treatment process based on an energy metering box, applied to the laser cutting exhaust gas treatment system based on an energy metering box as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. Waste gas capture: When laser cutting the metal sheet of the power metering box, the negative pressure equipment creates negative pressure inside the capture hood, which transports the metal dust waste gas generated during cutting to the treatment box. An airflow stabilizer is installed in the middle of the pipeline to adjust the airflow speed and keep it stable. S2. Exhaust gas purification: Large particles of hot metal debris are intercepted by the annular filter element. The cleaning component directly transports the intercepted large particles of hot metal debris to the dust storage area of ​​the cartridge dust collector body through the dust collection cylinder. Fine dust passes through the annular filter element and enters the cartridge dust collector body. The non-woven filter bag filters the fine dust, and then the exhaust gas is discharged. S3, Deep Purification: The waste gas after dust filtration passes through an adsorption bed filled with a large amount of activated carbon, which adsorbs organic molecules and some ozone in the waste gas, and then further decomposes the organic waste gas through photo-oxidation catalysis or catalytic combustion equipment. S4. Clean gas is transported through pipelines to an online monitoring device to detect particulate matter concentration in real time. Once the concentration is deemed acceptable, the gas is released into the atmosphere.

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