A laser welding apparatus for welding fume abatement

Abstract

This invention relates to the field of laser welding equipment technology and discloses a laser welding fume purification and treatment equipment. It solves the problem that existing welding fume purification equipment requires machine shutdown for cleaning and replacement after the coarse and fine filters and activated carbon become saturated, interrupting production, occupying time, and affecting production continuity. The equipment includes a filter chamber, with an air inlet pipe fixedly mounted at the air inlet end, and an air suction bucket fixedly mounted at the end of the air inlet pipe. A conveying pipe is fixedly connected to the air outlet end of the filter chamber. The conveying pipe is fixedly mounted on the surface of the laser welding machine body by a bracket. After assembly, the air suction bucket is precisely aligned with the welding processing point. A protective cover is fixedly mounted on the side of the filter chamber away from the conveying pipe through a protective shell. Two diversion valves and two adsorption chambers are connected to the end of the conveying pipe away from the filter chamber. This invention can complete filter self-cleaning and online activated carbon replacement while the equipment is running continuously, without interrupting the laser welding process, ensuring continuous operation of the production line.

Description

Technical Field

[0001] This invention belongs to the field of laser welding equipment technology, specifically a laser welding equipment for purifying and treating welding fumes. Background Technology

[0002] Laser welding fume purification equipment is used to collect and treat metal dust and fumes generated during laser welding. It uses a suction arm to draw the fumes from the welding point into the machine, where they are filtered through multiple layers to block the dust and remove harmful fumes. The purified gas can be directly discharged into the workshop, reducing the inhalation of harmful fumes by workers, protecting their health, and preventing fumes from adhering to the laser equipment lenses, ensuring normal welding operations. It meets workshop environmental standards and is suitable for use in various metal laser welding production sites. Existing laser welding fume purification equipment requires shutdown for cleaning or replacement of the coarse filter, fine filter, and activated carbon once they reach adsorption saturation. Shutting down the equipment necessitates suspending the laser welding process, disrupting continuous production, and impacting production continuity. Each cleaning and replacement operation consumes production time, causing work interruptions and reducing overall production efficiency. Summary of the Invention

[0003] In view of the above situation and to overcome the defects of the prior art, the present invention provides a laser welding equipment for purifying welding fumes, which effectively solves the problem that the existing welding fume purification equipment needs to be shut down for cleaning and replacement after the coarse and fine filters and activated carbon become saturated, which interrupts production, occupies working time, and affects the continuity of production.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a laser welding equipment for purifying welding fumes, comprising a filter chamber, an air inlet pipe fixedly mounted at the air inlet end of the filter chamber, an air suction bucket fixedly mounted at the end of the air inlet pipe, a conveying pipe fixedly connected to the air outlet end of the filter chamber, the conveying pipe being fixedly mounted on the surface of the laser welding machine body by means of a bracket, and after assembly, the air suction bucket being precisely aligned with the welding processing point, a protective cover being fixedly mounted on the side of the filter chamber away from the conveying pipe by a protective shell, and two diversion valves and two adsorption chambers being connected and mounted at the end of the conveying pipe away from the filter chamber, the adsorption chambers being filled with activated carbon, and a protective sleeve being fitted on the outside of the adsorption chambers, with diversion pipes connected to the ends of the protective sleeves, and a suction fan being mounted at the ends of the two diversion pipes. The filter chamber contains a coarse filter and a fine filter. The fine filter is positioned inside the coarse filter. Four partition blocks are evenly distributed between the coarse and fine filters and the inner wall of the filter chamber. The coarse and fine filters are connected on one side by a connecting plate. An anti-static brush roller is installed at the bottom of the filter chamber. The outer wall of the anti-static brush roller is tightly fitted to the surface of the coarse filter. A servo motor is fixed inside the protective cover by a support frame. The output end of the servo motor is equipped with a linkage component, which is connected to the anti-static brush roller and the connecting plate respectively. During the operation of the servo motor, the linkage component synchronously drives the connecting plate and the anti-static brush roller to rotate. The rotation of the connecting plate will drive the coarse and fine filters to rotate synchronously and switch the effective filtration area. The anti-static brush roller rotates synchronously to clean and scrape off the dust and impurities attached to the surface of the coarse filter.

[0005] Preferably, an opening is provided at the outer end of the protective cover, and a dustproof net can be detachably installed inside the opening.

[0006] Preferably, both the coarse and fine filters are annular structures. An anti-static cleaning brush is fixed on the lower partition between the coarse and fine filters, with the upper contact surface of the anti-static cleaning brush in close contact with the outer wall of the fine filter. A pulse nozzle is installed at the lower part between the coarse and fine filters. A pulse backflushing dust purifier is installed outside the filter chamber, and the pulse nozzle is connected to the pulse backflushing dust purifier pipeline. A receiving hopper is fixed at the bottom of the filter chamber. The anti-static cleaning brush, in conjunction with the pulse nozzle, can quickly pass the dust and impurities swept off the surface of the fine filter through the coarse filter and fall into the receiving hopper for centralized collection. Slip rings are fixed on the outer walls of both the coarse and fine filters, and corresponding sliding grooves are opened on the inner walls of the left and right sides of the filter chamber. The slip rings slide into the sliding grooves to complete the limiting assembly, and the contact gap between the slip rings and the sliding grooves is filled with sealing filler to achieve sealing and isolation.

[0007] Preferably, the linkage assembly includes a rotating shaft fixed to the output end of the servo motor. The end of the rotating shaft extends through the protective shell into the interior and fixes the drive gear. The outer wall of the rotating shaft is supported by the first sealed bearing and the protective shell for rotational positioning. A drive rod is fixed to the end face of the drive gear. The end of the drive rod extends into the filter chamber and is fixed to the connecting plate. The drive rod drives the connecting plate to rotate synchronously. A driven gear is meshed below the drive gear. A shaft is fixed to one side of the driven gear. The end of the shaft extends into the filter chamber and is fixedly connected to the antistatic brush roller. The two ends of the antistatic brush roller are respectively rotated and positioned with the inner wall of the filter chamber. The outer wall of the shaft is supported by the second sealed bearing and the side wall of the filter chamber for rotational sealing.

[0008] Preferably, a discharge valve is installed at the bottom of the receiving hopper, and opening the discharge valve can discharge the dust and impurities accumulated inside the receiving hopper to the outside.

[0009] Preferably, the sheath is screwed onto the outer wall of the adsorption chamber by screwing it in. When the sheath is screwed in and fits against the surface of the adsorption chamber, it simultaneously presses and fixes the diversion pipe to prevent air leakage and detachment. The installation sleeve is placed inside the adsorption chamber, and the activated carbon is fixedly filled inside the installation sleeve. Four slots are evenly opened at the end of the adsorption chamber. Four locking strips are fixed on the outer wall of the installation sleeve. The locking strips are inserted into the slots one by one to achieve the initial positioning of the installation sleeve. Four limiting blocks are fixed on the inner wall of the sheath. After the sheath is fully screwed in, the limiting blocks are pressed against the end face of the installation sleeve to lock and fix the installation sleeve.

[0010] Compared with the prior art, the beneficial effects of the present invention are: (1) The present invention is equipped with a rotatable annular coarse filter and a fine filter. The servo motor drives the filter to rotate and switch the filter working surface through the linkage component. The saturated filter area rotates to the cleaning station to complete the cleaning synchronously. There is no need to stop the machine to replace the filter, which ensures the continuous operation of the laser welding production line and reduces the time loss.

[0011] (2) The present invention is equipped with an antistatic brush roller, an antistatic cleaning brush and a pulse nozzle combined cleaning structure, which cleans the coarse and fine filter screens in layers respectively, and the dust is collected in the bottom receiving hopper. Only the discharge valve needs to be opened periodically to discharge the slag, and the filter screen maintenance operation is simple and convenient.

[0012] (3) The present invention adopts a dual adsorption chamber parallel structure. The single chamber can be switched to work by means of a diversion valve. After the activated carbon in a single adsorption chamber is saturated, the other adsorption chamber is switched to continue adsorbing flue gas. The saturated adsorption chamber can be disassembled and the activated carbon replaced online. The entire process does not require stopping the welding production.

[0013] (4) The filter sliding sealing structure, gear linkage sealing bearing structure and sleeve compression activated carbon installation structure of the present invention have strong overall sealing performance, avoid smoke and dust leakage, and the anti-static components can eliminate the static electricity generated by welding dust friction and prevent impurities from adsorbing on the brush bristles. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the laser welding equipment for fume purification in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the laser welding equipment for fume purification in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the structure of the laser welding equipment for fume purification in this invention. Figure 3 ; Figure 4This is a schematic diagram of the internal structure of the adsorption chamber of the present invention; Figure 5 This is a schematic diagram of the internal structure of the filter chamber, protective cover, and conveying pipe of the present invention; Figure 6 This is a schematic diagram of the internal structure of the filter chamber of the present invention; Figure 7 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; In the diagram: 1. Filter chamber; 2. Air inlet pipe; 3. Suction hopper; 4. Protective cover; 5. Opening; 6. Dustproof net; 7. Conveying pipe; 8. Diverter valve; 9. Sheath; 10. Suction fan; 11. Adsorption chamber; 12. Mounting sleeve; 13. Activated carbon; 14. Locking strip; 15. Locking groove; 16. Limiting block; 17. Coarse filter screen; 18. Fine filter screen; 19. Slip ring; 20. Slide groove; 21. Sealing packing; 22. Servo motor; 23. Rotating shaft; 24. First sealed bearing; 25. Drive gear; 26. Drive rod; 27. Connecting disc; 28. Driven gear; 29. ​​Shaft; 30. Antistatic brush roller; 31. Second sealed bearing; 32. Antistatic cleaning brush; 33. Protective shell; 34. Pulse nozzle; 35. Divider block; 36. Diverter pipe; 37. Support frame; 38. Receiving hopper. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] The following is an example: by Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 The present invention includes a filter chamber 1, with an air inlet pipe 2 fixedly connected to the air inlet end of the filter chamber 1. An air suction bucket 3 is fixedly installed at the end of the air inlet pipe 2 away from the filter chamber 1. The entire set of equipment is fixed to the delivery pipe 7 near the laser welding head by a bracket. After installation, the air suction bucket 3 is precisely aligned with the fusion welding point of the laser welding, and the fumes generated by the welding operation can be captured and sucked into the pipeline by the air suction bucket 3 in the first time. The air outlet end of the filter chamber 1 is integrally connected to the delivery pipe 7. A protective shell 33 is fixedly installed on the outer wall of the filter chamber 1 on the side away from the delivery pipe 7. A protective cover 4 is fixed on the outside of the protective shell 33. An opening 5 is opened on the outer end face of the protective cover 4. A dustproof net 6 is detachably installed inside the opening 5. The dustproof net 6 can prevent large particles of debris in the workshop from entering the interior of the protective cover 4 and damaging the servo motor 22. During daily cleaning, the dustproof net 6 can be directly pulled out and rinsed to complete the maintenance.

[0018] The end of the delivery pipe 7, away from the filter chamber 1, branches and connects to two sets of diversion valves 8. Each set of diversion valves 8 is connected to an adsorption chamber 11. The outer walls of both adsorption chambers 11 are threaded with sheaths 9. The ends of the sheaths 9 are fixedly connected to diversion pipes 36. The ends of the two diversion pipes 36 are connected to the suction fan 10. The suction fan 10 provides negative pressure suction for the entire pipeline. The diversion valves 8 can control the on / off of a single adsorption chamber 11. In daily production, one chamber can work while the other is on standby. When replacing activated carbon 13, there is no need to shut down the suction fan 10 and the laser welding equipment.

[0019] An installation sleeve 12 is placed inside the cavity of the adsorption chamber 11. Activated carbon 13 is evenly filled and fixed inside the installation sleeve 12. Four slots 15 are evenly formed in a ring at the end of the adsorption chamber 11 near the protective sleeve 9. Four locking strips 14 are integrally formed on the outer wall of the installation sleeve 12. During assembly, the locking strips 14 are aligned with the slots 15 and pushed in to complete the initial positioning of the installation sleeve 12. Four limiting blocks 16 are integrally formed on the inner wall of the protective sleeve 9. After the protective sleeve 9 is screwed tightly along the thread to fit against the outer wall of the adsorption chamber 11, the limiting blocks 16 are pressed tightly against the end face of the installation sleeve 12 and locked to prevent the installation sleeve 12 from shaking or shifting due to airflow impact. When disassembling, the protective sleeve 9 can be unscrewed in the opposite direction to directly pull out the installation sleeve 12 to replace the saturated activated carbon 13.

[0020] The internal cavity of the filter chamber 1 is equipped with an annular coarse filter 17 and an annular fine filter 18. The fine filter 18 is nested inside the coarse filter 17. Four partition blocks 35 are evenly distributed between the coarse filter 17, the fine filter 18 and the inner wall of the filter chamber 1 to achieve spatial partitioning. The coarse filter 17 and the fine filter 18 are integrally connected to the connecting plate 27 on the same side end face. Slip rings 19 are fixed on the outer walls of both the left and right sides of the coarse filter 17 and the fine filter 18. Slip grooves 20 are opened on the inner walls of the left and right sides of the filter chamber 1 respectively. The slip rings 19 slide into the slip grooves 20. The contact gap between the slip rings 19 and the slip grooves 20 is filled with sealing filler 21 to ensure the airtightness of the filter chamber 1 during the rotation of the filter screen and to prevent smoke and dust from overflowing from the sliding gap.

[0021] An antistatic brush roller 30 is horizontally arranged at the bottom of the filter chamber 1. The outer wall of the bristles of the antistatic brush roller 30 is tightly attached to the outer surface of the coarse filter screen 17. An antistatic cleaning brush 32 is fixed on the partition block 35 at the lower position between the coarse filter screen 17 and the fine filter screen 18. The upper bristles of the antistatic cleaning brush 32 are tightly attached to the outer wall of the fine filter screen 18. A pulse nozzle 34 is fixed at the lower position between the coarse filter screen 17 and the fine filter screen 18. An external pulse backflushing dust purifier is connected to the filter chamber 1. The pulse nozzle 34 is connected to the pulse backflushing dust purifier through a pipeline. A receiving hopper 38 is fixed at the bottom of the filter chamber 1. A discharge valve is installed at the bottom of the receiving hopper 38. The antistatic cleaning brush 32, together with the high-pressure airflow of the pulse nozzle 34, can blow away the fine dust adhering to the surface of the fine filter screen 18. After the dust passes through the coarse filter screen 17, it falls into the receiving hopper 38 for centralized storage. After accumulating to a certain amount, the discharge valve is opened to discharge the slag.

[0022] Depend on Figure 5 and Figure 6 As shown, the servo motor 22 is fixed inside the protective cover 4 by the support frame 37. The output end of the servo motor 22 is connected to the linkage component. The linkage component includes a rotating shaft 23. One end of the rotating shaft 23 is fixed to the output shaft of the servo motor 22. The rotating shaft 23 extends through the protective shell 33 into the interior. The outer wall of the rotating shaft 23 is fitted with a first sealed bearing 24. The first sealed bearing 24 provides rotational sealing support between the rotating shaft 23 and the protective shell 33. The end of the rotating shaft 23 is fixed with a drive gear 25. The end face of the drive gear 25 is vertically fixed with a drive rod 26. The drive rod 26 extends into the filter chamber 1 and is rigidly fixed to the connecting plate 27. The driven gear 28 is meshed and assembled below the drive gear 25. The shaft 29 is fixed on one side of the driven gear 28. The shaft 29 passes through the side wall of the filter chamber 1 and extends into the interior to be fixed to the end of the antistatic brush roller 30. The outer wall of the shaft 29 is fitted with a second sealing bearing 31. The second sealing bearing 31 fills the gap between the shaft 29 and the side wall of the filter chamber 1 to achieve rotational sealing. The two ends of the antistatic brush roller 30 are respectively supported by the shaft 29 and the inner wall of the filter chamber 1 for rotational limiting.

[0023] When the servo motor 22 starts running, it drives the rotating shaft 23 to rotate synchronously. The rotating shaft 23 drives the drive gear 25 to rotate. The drive gear 25 drives the connecting plate 27 to rotate through the drive rod 26. The connecting plate 27 drives the coarse filter screen 17 and the fine filter screen 18 to rotate around the circumference of the slide groove 20, switching the clean filter screen area into the dust filtration passage. The saturated filter screen area full of dust rotates to the cleaning station corresponding to the antistatic brush roller 30, the antistatic cleaning brush 32 and the pulse nozzle 34. On the other hand, the drive gear 25 meshes with and drives the driven gear 28 to rotate in the opposite direction. The driven gear 28 drives the antistatic brush roller 30 to rotate synchronously through the shaft 29. The rotating bristles of the antistatic brush roller 30 continuously scrape the outer surface of the coarse filter screen 17, removing large pieces of metal dust. With the high-pressure airflow of the pulse nozzle 34 and the antistatic cleaning brush 32, the dust in the inner layer of the fine filter screen 18 is cleaned layer by layer. The entire process does not require stopping the machine to disassemble the filter screen and does not interrupt the laser welding production process. The high-pressure airflow from the pulse nozzle 34 can also be directed at the antistatic brush roller 30 and the antistatic cleaning brush 32 for cleaning. It relies on the instantaneous high-pressure airflow to peel off the metal oxide dust stuck in the gaps of the brush bristles, thus avoiding cleaning failure after the brush bristles accumulate dirt and preventing secondary pollution of the filter screen.

[0024] A differential pressure sensor and a photoionization gas sensor are added. The differential pressure sensor is installed inside the filter chamber 1 and on both sides of the coarse filter 17 and the fine filter 18. The photoionization gas sensor is installed on both sides of the activated carbon 13. Both sensors are electrically connected to an external PLC logic controller, servo motor 22, and pulse backflushing dust purifier via a wireless transmission module. When the differential pressure sensor detects a difference in flow rate before and after filtration, it indicates that dust accumulation on the surface of the coarse filter 17 and the fine filter 18 is severe, and the controller automatically starts the servo motor 22 to rotate the filter. When the photoionization gas sensor detects a difference in gas concentration at the inlet and outlet of the activated carbon 13, the controller automatically starts the pulse backflushing dust purifier to perform high-pressure blowing through the pulse nozzle 34, automatically completing the filter cleaning without the need for manual timed cleaning, thus achieving a higher level of intelligence.

[0025] A rubber sealing gasket is added to the inner wall of the sheath 9 near the diversion pipe 36. When the sheath 9 is tightened and pressed against the diversion pipe 36, the rubber gasket fills the gap in the pipe, improves the pipe sealing, prevents air leakage during the negative pressure operation of the suction fan 10, ensures stable suction of the suction hopper 3, and avoids the escape of smoke and dust.

[0026] The bristles of the antistatic brush roller 30 are made of conductive carbon fiber. The conductive carbon fiber can quickly discharge the static electricity generated by dust friction, avoiding the accumulation of static electricity in metal dust and the generation of sparks. It is suitable for use in laser welding processing workshops with high dust and high explosion-proof requirements.

[0027] Working principle: When the whole set of equipment is running, the suction fan 10 starts to generate negative pressure in the pipeline. The fumes generated by laser welding are captured by the suction bucket 3 and enter the filter chamber 1 through the air inlet pipe 2. The fumes first pass through the outer coarse filter screen 17 to intercept large pieces of metal welding slag dust, and then pass through the inner fine filter screen 18 to filter fine metal dust. After double-layer physical filtration, the gas containing trace amounts of harmful fumes flows along the conveying pipe 7 through the diversion valve 8 into the adsorption chamber 11. The activated carbon 13 inside the adsorption chamber 11 adsorbs harmful volatiles in the fumes. The purified clean gas is discharged to the workshop through the diversion pipe 36 and the suction fan 10.

[0028] Dust accumulates on the coarse filter 17 and fine filter 18 inside the filter chamber 1 over time. The equipment periodically or based on sensor signals activates the servo motor 22, which drives the drive gear 25 via the rotating shaft 23. One drive gear 25 drives the connecting plate 27 to rotate via the drive rod 26, causing the coarse filter 17 and fine filter 18 to rotate synchronously. The clean filter area switches to the filtration path, while the dust-accumulated filter rotates to the bottom cleaning station. Another drive gear 25 meshes with the driven gear 28, driving the shaft 29 and antistatic brush roller 30 to rotate synchronously. The antistatic brush roller 30 continuously brushes away large dust particles from the outer wall of the coarse filter 17. At the same time, the pulse backflushing dust purifier sprays high-pressure airflow through the pulse nozzle 34, which, together with the antistatic cleaning brush 32, sweeps away fine dust from the inner wall of the fine filter 18. All the detached dust falls into the receiving hopper 38, and the dust can be collected and cleaned by periodically opening the bottom discharge valve.

[0029] The two adsorption chambers 11 are connected by a diversion valve 8 to achieve one in use and one in standby. After the activated carbon 13 in one chamber is saturated, the diversion valve 8 is switched to use the other adsorption chamber 11 to continuously treat the flue gas. The installation sleeve 12 can be pulled out and the internal saturated activated carbon 13 can be replaced by unscrewing the corresponding protective sleeve 9. The entire process of filter cleaning and activated carbon replacement does not require shutting down the laser welding host and the exhaust fan 10, and will not interrupt the welding process. This effectively solves the problem of downtime maintenance and loss of working time and impact on continuous production caused by traditional equipment.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser welding equipment for purifying welding fumes, comprising a filter chamber (1), an air inlet pipe (2), an air suction hopper (3), a conveying pipe (7), a rotatable double-layer filter assembly, a linkage cleaning mechanism, a double adsorption purification assembly, and a suction fan (10); the air inlet end of the filter chamber (1) is connected to the air inlet pipe (2), and the end of the air inlet pipe (2) is provided with an air suction hopper (3) for collecting fumes aligned with the laser welding point; the air outlet end of the filter chamber (1) is connected to the conveying pipe (7); the rotatable double-layer filter assembly is coaxially mounted inside the filter chamber (1), comprising a coarse filter (17) and a fine filter (18) arranged in a nested manner; the fumes flow path is to first pass through the coarse filter (17) and then flow through the fine filter (18); the coarse filter (17) and the fine filter (18) are rigidly connected and rotate synchronously; The linkage cleaning mechanism is located on one side of the filter chamber (1), driven by a single power source and coupled with the transmission of the double-layer filter assembly. When the linkage cleaning mechanism is working, it synchronously drives the double-layer filter to rotate to switch the filter working surface and synchronously cleans the dust adhering to the filter surface. The end of the conveying pipe (7) is connected to two adsorption branches in parallel. The two adsorption branches share the same suction fan (10) to provide a negative pressure air source. Each adsorption branch is equipped with a diversion valve (8) and an adsorption chamber (11). The diversion valve (8) can independently open and close the corresponding adsorption branch. When a single branch is cut off to replace the adsorption consumables, the other branch is kept open to achieve non-stop purification operation. The dust purification equipment is fixed to the laser welding host processing station by a bracket, and the suction bucket (3) is directly facing the laser welding processing point.

2. The laser welding equipment for purifying welding fumes according to claim 1, characterized in that: The filter chamber (1) is fitted with a protective cover (4) through a protective shell (33) on the outside. An opening (5) is opened on the outer wall of the protective cover (4). A dustproof net (6) can be detachably installed in the opening (5). A servo motor (22) is fixed inside the protective cover (4) through a support frame (37). The servo motor (22) is the single power source of the linkage cleaning mechanism.

3. The laser welding equipment for purifying welding fumes according to claim 2, characterized in that: The coarse filter (17) and fine filter (18) are rigidly connected as one unit through the connecting plate (27); the linkage cleaning mechanism includes a rotating shaft (23), a drive gear (25), a drive rod (26), a driven gear (28), a shaft (29), and an anti-static brush roller (30); the output end of the servo motor (22) is fixed to the rotating shaft (23), and the rotating shaft (23) passes through the protective shell (33) and is fixedly connected to the drive gear (25); The drive rod (26) is fixed to the end face of the drive gear (25), and the drive rod (26) extends into the filter chamber (1) and is fixed to the connecting plate (27); the lower part of the drive gear (25) meshes with the driven gear (28), and the shaft (29) is connected to one side of the driven gear (28). The shaft (29) extends into the filter chamber (1) and fixes the antistatic brush roller (30), and the outer wall of the antistatic brush roller (30) is attached to the outer surface of the coarse filter screen (17).

4. The laser welding equipment for purifying welding fumes according to claim 3, characterized in that: The outer wall of the rotating shaft (23) is fitted with a first sealed bearing (24), and the rotating shaft (23) is rotated and sealed with the protective shell (33) through the first sealed bearing (24); the outer wall of the shaft (29) is fitted with a second sealed bearing (31), and the shaft (29) is rotated and sealed with the side wall of the filter chamber (1) through the second sealed bearing (31).

5. The laser welding equipment for purifying welding fumes according to claim 3, characterized in that: The linkage cleaning mechanism also includes an antistatic cleaning brush (32) and a pulse nozzle (34); a partition block (35) is provided between the coarse filter (17) and the fine filter (18), and the antistatic cleaning brush (32) is fixed on the partition block (35) located at the lower part between the coarse filter (17) and the fine filter (18), and the antistatic cleaning brush (32) is attached to the outer wall of the fine filter (18); the pulse nozzle (34) is located at the lower part between the coarse filter (17) and the fine filter (18) and is connected to the pulse backflushing dust purifier.

6. The laser welding equipment for purifying welding fumes according to claim 5, characterized in that: The filter chamber (1) has a fixed receiving hopper (38) at the bottom. The bottom of the receiving hopper (38) is equipped with an openable and closable discharge valve for collecting the dust that is swept off by the antistatic brush roller (30) and the antistatic cleaning brush (32).

7. The laser welding equipment for purifying welding fumes according to claim 1, characterized in that: The double-layer filter assembly has fixed slip rings (19) on both sides, and a matching groove (20) is opened on the inner wall of the filter chamber (1). The slip ring (19) is slidably assembled inside the groove (20), and the gap between the slip ring (19) and the groove (20) is filled with sealing filler (21) to achieve rotational sealing.

8. The laser welding equipment for purifying welding fumes according to claim 1, characterized in that: The adsorption chamber (11) is provided with an installation sleeve (12) filled with activated carbon (13). A slot (15) is opened at the end of the adsorption chamber (11). A locking strip (14) that engages with the slot (15) is provided on the outer wall of the installation sleeve (12). The outer side of the adsorption chamber (11) is threaded to lock the protective sleeve (9). A limiting block (16) is provided on the inner wall of the protective sleeve (9). After the protective sleeve (9) is locked, the limiting block (16) presses the installation sleeve (12). The end of the protective sleeve (9) is connected to the diversion pipe (36). The two diversion pipes (36) are connected to the suction fan (10).

9. The laser welding equipment for purifying welding fumes according to claim 3, characterized in that: It also includes an intelligent detection and control component, which includes a differential pressure sensor, a photoionization gas sensor and a PLC controller; the differential pressure sensor is located on both sides of the coarse filter (17) and the fine filter (18), and the photoionization gas sensor is located at the inlet and outlet of the adsorption chamber (11); the differential pressure sensor and the photoionization gas sensor are electrically connected to the PLC controller, and the PLC controller controls the servo motor (22) and the pulse backflushing dust purifier to start and stop automatically for cleaning.

10. The laser welding equipment for purifying welding fumes according to claim 3, characterized in that: The bristles of the antistatic brush roller (30) are made of conductive carbon fiber.

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