Thin-walled blade plasma cutting device

Abstract

This invention relates to the field of plasma cutting technology, specifically to a plasma cutting device for thin-walled blades. It includes a frame, with a drive frame mounted on the upper end of the frame. The drive frame is connected to a plasma cutter. A pump body is fixed to one side of the plasma cutter. An inlet pipe is fixedly connected to the lower end of the pump body, and a post-filter is fixedly connected to the upper end of the pump body. A pre-filter is installed inside the inlet pipe. This invention achieves stratified interception of solid impurities, harmful gases, and fine particles in the flue gas through a multi-stage filtration structure of pre-filters and post-filters. The pre-filter preferentially intercepts micron-sized metal debris generated during plasma cutting, reducing the load on the post-filter; the post-filter further adsorbs harmful gases and removes fine dust, ensuring the flue gas purification efficiency in the cutting area and meeting the stringent clean environment requirements for high-precision machining of thin-walled blades.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting technology, specifically to a plasma cutting device for thin-walled blades. Background Technology

[0002] Thin-walled blades are core components in aerospace, energy equipment, and other fields, requiring extremely high manufacturing precision and surface quality. Plasma cutting technology, with its advantages of high cutting speed and smooth kerf, has become one of the mainstream processes for processing thin-walled blades. However, the plasma cutting process generates a large amount of mixed fumes containing metal particles, dust, and harmful gases. Direct emission of these fumes not only pollutes the environment but also threatens the health of operators. Therefore, real-time filtration and purification of the fumes is a critical requirement for plasma cutting equipment.

[0003] Existing thin-walled blade plasma cutting devices mostly employ flue gas treatment systems with a single filtration structure. These typically only have a simple filter or dry filter near the cutting head, resulting in insufficient filtration precision and difficulty in effectively intercepting micron-sized metal particles generated during plasma cutting. This leads to excessive load on subsequent purification stages and can even cause equipment failure due to impurity accumulation. Furthermore, the filter elements are prone to clogging by solid impurities after prolonged use, significantly reducing filtration efficiency. However, existing devices often require shutdown for filter replacement, severely impacting the continuous processing efficiency of thin-walled blades. Simultaneously, the thin-walled material easily generates splatter debris during cutting, and traditional filtration structures cannot achieve simultaneous "cutting and filtering" operations, causing flue gas to stagnate in the cutting area and further interfering with cutting precision.

[0004] Although some devices are equipped with multi-stage filtration, each filtration unit has a single function, which can only complete basic purification such as interception and adsorption. Without combining it with active maintenance methods such as backflushing cleaning and directional removal of impurities, the performance of the filtration system deteriorates significantly after long-term operation, making it difficult to meet the stringent requirements of high-precision machining of thin-walled blades for flue gas purification efficiency. Summary of the Invention

[0005] The main objective of this invention is to provide a cutting device that can filter the flue gas generated during the plasma cutting of thin-walled blades. This cutting device facilitates backflushing and cleaning of the filter element.

[0006] To achieve the above objectives, the technical solution provided by this invention is as follows:

[0007] A thin-walled blade plasma cutting device includes a frame with a drive frame at the top, which is connected to a plasma cutter. A pump body is fixed to one side of the plasma cutter. An inlet pipe is fixedly connected to the lower inlet of the pump body, and a post-filter is fixedly connected to the upper outlet. A pre-filter is installed inside the inlet pipe. The pre-filter includes a fixed block inside the inlet pipe, a turntable rotatably mounted on the upper end of the fixed block, a magnetic plate fixed in the middle of the upper end of the turntable, and arc-shaped sleeves sliding on both sides of the magnetic plate. The magnetic plate magnetically attracts the sleeves, and the two sleeves are concentric. An arc-shaped upper filter cylinder is fixed to one end of each sleeve. The end of the upper filter cylinder away from the sleeve passes through a perforation on the turntable. One end of the upper filter cylinder is connected to... The bottom of the turntable is flush with the ground. A drive unit that can drive the sleeve rod to rotate is installed in the inlet pipe above the turntable. An arc-shaped stepped groove is opened in the fixed block. An arc-shaped lower filter cylinder is elastically slidably installed in the large groove on the upper side of the stepped groove. The upper end of the lower filter cylinder is blocked by the bottom of the turntable. When the perforation is concentric with the upper end of the large groove, the drive unit can drive the upper filter cylinder above the large groove into the large groove. After the upper filter cylinder enters the large groove, the sleeve rod makes sealing contact with the perforation. During the process of the upper filter cylinder entering the large groove, it pushes the lower filter cylinder into the small groove. A drain pipe is fixed on the inlet pipe. One end of the drain pipe is connected to the small groove of the stepped groove, and the other end of the drain pipe is connected to the filter bag on the outside of the inlet pipe. The outlet of the rear filter element is connected to the large groove through a connecting pipe.

[0008] Specifically, the drive frame includes a first electrically controlled slide rail fixed to the upper end of the frame, a second electrically controlled slide rail fixed to the sliding part of the first electrically controlled slide rail, the second electrically controlled slide rail being perpendicular to the first electrically controlled slide rail, a third electrically controlled slide rail fixed to the sliding part of the second electrically controlled slide rail, the third electrically controlled slide rail being vertically arranged, and the plasma cutter being fixed to the slide base of the third electrically controlled slide rail.

[0009] Specifically, the lower end of the inlet tube is bent toward the cutting head of the plasma cutter.

[0010] Specifically, the post-filter includes an adsorption purifier whose inlet is connected to the upper outlet of the pump body, a wet purifier fixed at the upper end of the adsorption purifier, an outlet of the adsorption purifier connected to the inlet of the wet purifier, and an outlet of the wet purifier connected to one end of a connecting pipe.

[0011] Specifically, a servo motor is fixed inside the fixed block. The output shaft of the servo motor is concentrically and fixedly connected to the turntable. The lower end of the turntable is rotatably and sealingly connected to the upper end of the fixed block. The outer edge of the turntable is rotatably and sealingly contacting the inner edge of the inlet pipe.

[0012] Specifically, both ends of the magnetic suction plate are fixed with arc-shaped guide rods, and the sleeve rod is slidably sleeved on the outside of the guide rod, with the sleeve rod and the guide rod being concentric.

[0013] Specifically, when the perforation is concentric with the upper end of the large groove, the upper filter cylinder, lower filter cylinder, and stepped groove above the large groove are concentric.

[0014] Specifically, a retaining ring is concentrically fixed at the upper end of the lower filter cartridge, and the retaining ring and the step of the stepped groove are connected by an arc spring.

[0015] Specifically, the driving component includes a motor fixed inside the inlet pipe, a gear concentrically fixed on the output shaft of the motor, and an arc-shaped rack concentrically fixed on the outer side of the sleeve rod. When the through hole and the upper port of the large groove are concentric, the gear meshes with the adjacent rack.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. Through a multi-stage filtration structure consisting of pre-filters and post-filters, solid impurities, harmful gases, and fine particles in the flue gas are intercepted in layers. The pre-filters preferentially intercept micron-sized metal debris generated by plasma cutting, reducing the load on the post-filters; the post-filters further adsorb harmful gases and remove fine dust, ensuring the flue gas purification efficiency in the cutting area and meeting the stringent requirements for a clean environment in the high-precision machining of thin-walled blades.

[0018] 2. The front filter adopts a dynamic maintenance mechanism of dual upper filter cartridges, rotary table switching, and backflushing cleaning, which can realize alternating operation of one cartridge working and the other cartridge being cleaned. The rotary table is driven by a servo motor to rotate and switch the position of the upper filter cartridge to be cleaned. The gas purified by the rear filter is used to backflush it, so that the detached impurities are poured out through the lower filter cartridge. There is no need to stop the machine to disassemble the upper filter cartridge, which greatly improves the continuous cutting efficiency of thin-walled blades.

[0019] 3. Solid impurities that fall off during the backflushing cleaning of the upper filter cartridge can fall directly into the lower filter cartridge, preventing impurities from spreading to the stepped groove on the outside of the upper filter cartridge. This also prevents impurities in the stepped groove from adhering to the outer wall of the upper filter cartridge and clogging the filter holes during subsequent backflushing of the upper filter cartridge, thus extending the service life of the upper filter cartridge. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the device.

[0021] Figure 2 This is a schematic diagram of a plasma cutter.

[0022] Figure 3 This is a cross-sectional view of the inlet pipe.

[0023] Figure 4 This is a schematic diagram showing the hole and the upper end of the large groove concentric after the turntable rotates.

[0024] Figure 5 This is a schematic diagram of the retaining ring installed at the upper end of the lower filter cartridge.

[0025] Figure 6 This is a schematic diagram showing the connection between the upper filter cartridge and the sleeve rod.

[0026] The components in the attached diagram are named as follows: 1. Frame; 2. First electrically controlled slide rail; 3. Second electrically controlled slide rail; 4. Third electrically controlled slide rail; 5. Slide base; 6. Plasma cutter; 7. Pump body; 8. Inlet pipe; 9. Adsorption purifier; 10. Wet purifier; 11. Turntable; 12. Magnetic suction plate; 13. Guide rod; 14. Sleeve rod; 15. Rack; 16. Upper filter cartridge; 17. Motor; 18. Gear; 19. Connecting pipe; 20. Fixing block; 21. Large slot; 22. Small slot; 23. Pipeline; 24. Lower filter cartridge; 25. Arc spring; 26. Servo motor; 27. Retaining ring. Detailed Implementation

[0027] 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.

[0028] like Figures 1-6 As shown, the thin-walled blade plasma cutting device includes a frame 1, with a drive frame at the upper end of the frame 1, and the drive frame is connected to the plasma cutter 6.

[0029] Specifically, the drive frame includes a first electrically controlled slide rail 2 fixed to the upper end of the frame 1. A second electrically controlled slide rail 3 is fixed to the sliding part of the first electrically controlled slide rail 2, and the second electrically controlled slide rail 3 is perpendicular to the first electrically controlled slide rail 2. A third electrically controlled slide rail 4 is fixed to the sliding part of the second electrically controlled slide rail 3, and the third electrically controlled slide rail 4 is vertically arranged. The plasma cutter 6 is fixed to the slide base 5 of the third electrically controlled slide rail 4. The drive frame can drive the plasma cutter 6 to move in three-axis directions.

[0030] A pump body 7 is fixed to one side of the plasma cutter 6. The lower end of the pump body 7 is fixedly connected to an inlet pipe 8, and the lower end of the inlet pipe 8 is bent toward the cutting head of the plasma cutter 6.

[0031] A post-filter is fixedly connected to the upper outlet of the pump body 7. Specifically, the post-filter includes an adsorption purifier 9 whose inlet is connected to the upper outlet of the pump body 7, a wet scrubber 10 fixed to the upper end of the adsorption purifier 9, and the outlet of the adsorption purifier 9 connected to the inlet of the wet scrubber 10.

[0032] A pre-filter is installed inside the inlet pipe 8.

[0033] The pre-filter includes a fixing block 20 fixed inside the inlet pipe 8, and a turntable 11 is rotatably mounted on the upper end of the fixing block 20.

[0034] Furthermore, a servo motor 26 is fixed inside the fixed block 20. The output shaft of the servo motor 26 is concentrically and fixedly connected to the turntable 11. The lower end of the turntable 11 is rotatably and sealingly connected to the upper end of the fixed block 20. The outer edge of the turntable 11 is rotatably and sealingly contacted with the inner edge of the inlet pipe 8.

[0035] A magnetic suction plate 12 is fixed at the middle of the upper end of the turntable 11, and arc-shaped sleeves 14 are slidably arranged on both sides of the magnetic suction plate 12. Furthermore, arc-shaped guide rods 13 are fixed at both ends of the magnetic suction plate 12, and the sleeves 14 are slidably sleeved on the outside of the guide rods 13, with the sleeves 14 and the guide rods 13 being concentric.

[0036] The magnetic plate 12 magnetically attracts the sleeve rod 14, and the two sleeve rods 14 are concentric.

[0037] An arc-shaped upper filter cylinder 16 is fixed to one end of each sleeve rod 14. The end of the upper filter cylinder 16 away from the sleeve rod 14 passes through the perforation on the turntable 11. One end of the upper filter cylinder 16 is flush with the lower end of the turntable 11. A drive component capable of driving the sleeve rod 14 to rotate is provided in the inlet pipe 8 above the turntable 11.

[0038] The driving component includes a motor 17 fixed inside the inlet tube 8, a gear 18 concentrically fixed on the output shaft of the motor 17, and an arc-shaped rack 15 concentrically fixed on the outer side of the sleeve rod 14.

[0039] An arc-shaped stepped groove is formed inside the fixed block 20. An arc-shaped lower filter cylinder 24 is elastically slidably arranged in the large groove 21 on the upper side of the stepped groove. The upper end of the lower filter cylinder 24 is blocked by the lower end of the turntable 11. Furthermore, a retaining ring 27 is concentrically fixed at the upper end of the lower filter cylinder 24. The retaining ring 27 and the step of the stepped groove are connected by an arc-shaped spring 25.

[0040] When the perforation is concentric with the upper end of the large groove 21, the gear 18 meshes with the adjacent rack 15, and the upper filter cylinder 16, lower filter cylinder 24, and stepped groove above the large groove 21 are concentric. The driving component can drive the upper filter cylinder 16 above the large groove 21 into the large groove 21.

[0041] After the upper filter cartridge 16 enters the large tank 21, the sleeve rod 14 contacts the perforated seal. During the process of the upper filter cartridge 16 entering the large tank 21, it pushes the lower filter cartridge 24 into the small tank 22.

[0042] A drain pipe 23 is fixed on the inlet pipe 8. One end of the drain pipe 23 is connected to the small groove 22 of the stepped groove, and the other end of the drain pipe 23 is connected to the filter bag on the outside of the inlet pipe 8.

[0043] The outlet of the post-filter is connected to the large tank 21 via a connecting pipe 19. Furthermore, the outlet of the wet purifier 10 is connected to one end of the connecting pipe 19.

[0044] In the initial state, the perforations are located on both sides of the fixed block 20, the magnetic suction plate 12 magnetically attracts the sleeve rod 14, and the lower end of the upper filter cylinder 16 is flush with the lower end of the turntable 11. When the pump body 7 is started, the flue gas generated by cutting the thin-walled blades can enter the inlet pipe 8. The flue gas entering the inlet pipe 8 enters the upper filter cylinder 16 through the perforations and is filtered. Solid impurities in the flue gas are intercepted inside the upper filter cylinder 16.

[0045] After solid impurities have been removed, the flue gas passes sequentially through the pump body 7, the adsorption purifier 9, and the wet purifier 10, and then enters the large trough 21 of the stepped trough through the connecting pipe 19. At this time, the turntable 11 blocks the upper end of the lower filter cartridge 24, and the gas entering the large trough 21 of the stepped trough is filtered by the lower filter cartridge 24 and then discharged sequentially through the small trough 22 of the stepped trough, the drain pipe 23, and the filter bag.

[0046] When cleaning of the upper filter cartridge 16 is required, the servo motor 26 is activated, driving the turntable 11 to rotate 90 degrees, with one of the perforations concentric with the upper port of the large groove 21. For ease of description, the upper filter cartridge 16 on the upper side of the stepped groove is the cartridge to be cleaned, and the other upper filter cartridge 16 is the working cartridge. When the perforation of the cartridge to be cleaned is concentric with the upper port of the large groove 21, the lower end of the cartridge to be cleaned contacts the upper end of the lower filter cartridge 24, and the cartridge to be cleaned, the lower filter cartridge 24, and the stepped groove are concentric. The rack 15 on the outer side of the cartridge to be cleaned meshes with the gear 18. Then, the motor 17 is started, and the motor 17 drives the gear 18 to rotate. The gear 18 drives the cleaning cylinder to move into the large groove 21 of the stepped groove through the rack 15 on the outside of the cleaning cylinder. The lower filter cylinder 24 moves into the small groove 22 of the stepped groove. When the entire cleaning cylinder enters the large groove 21 of the stepped groove, the outer edge of the sleeve 14 makes a sealing contact with the wall of the perforated hole. Subsequently, the gas entering the large groove 21 from the connecting pipe 19 can backflush the cleaning cylinder. After the solid impurities in the cleaning cylinder fall off, they pass through the lower filter cylinder 24 and the discharge pipe 23 in sequence and enter the filter bag.

[0047] When cleaning solid impurities in the cleaning cylinder, the working cylinder is in working condition.

[0048] After the cleaning of the cylinder is completed, start motor 17 to reset the cylinder to be cleaned.

[0049] Then start the servo motor 26. The servo motor 26 drives the turntable 11 to rotate 180 degrees and then cleans the other upper filter cartridge 16.

[0050] By setting the lower filter cartridge 24, solid impurities that fall off from the upper filter cartridge 16 can directly enter the lower filter cartridge 24 and be discharged, preventing impurities that fall off from the upper filter cartridge 16 from entering the stepped groove on the outside of the upper filter cartridge 16. This prevents solid impurities in the stepped groove from adhering to the outside of the upper filter cartridge 16 and clogging the filter holes during the subsequent backflushing of the upper filter cartridge 16.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A thin-walled blade plasma cutting device, comprising a frame (1), a drive frame disposed at the upper end of the frame (1), the drive frame being connected to a plasma cutter (6), characterized in that, A pump body (7) is fixed to one side of the plasma cutter (6). The lower inlet of the pump body (7) is fixedly connected to an inlet pipe (8), and the upper outlet of the pump body (7) is fixedly connected to a rear filter. A front filter is installed inside the inlet pipe (8). The front filter includes a fixing block (20) fixed inside the inlet pipe (8). A turntable (11) is rotatably installed on the upper end of the fixing block (20). A magnetic suction plate (12) is fixed in the middle of the upper end of the turntable (11). 2) Both sides of the device are slidably provided with arc-shaped sleeves (14), and the magnetic plate (12) magnetically attracts the sleeves (14). The two sleeves (14) are concentric, and an arc-shaped upper filter cylinder (16) is fixed to one end of each sleeve (14). The end of the upper filter cylinder (16) away from the sleeve (14) passes through the perforation on the turntable (11). One end of the upper filter cylinder (16) is flush with the lower end of the turntable (11). The inlet pipe (8) above the turntable (11) is provided with a device that can drive The driving component for rotating the moving sleeve rod (14) has an arc-shaped stepped groove in the fixed block (20). An arc-shaped lower filter cylinder (24) is elastically slidably arranged in the large groove (21) on the upper side of the stepped groove. The upper end of the lower filter cylinder (24) is blocked by the lower end of the turntable (11). When the perforation is concentric with the upper end of the large groove (21), the driving component can drive the upper filter cylinder (16) above the large groove (21) into the large groove (21). (21) The middle and rear sleeve rod (14) is in contact with the perforated seal. As the upper filter cylinder (16) enters the large groove (21), it pushes the lower filter cylinder (24) into the small groove (22). A drain pipe (23) is fixed on the inlet pipe (8). One end of the drain pipe (23) is connected to the small groove (22) of the stepped groove, and the other end of the drain pipe (23) is connected to the filter bag outside the inlet pipe (8). The outlet of the rear filter element is connected to the large groove (21) through the connecting pipe (19).

2. The thin-walled blade plasma cutting device according to claim 1, characterized in that, The drive frame includes a first electrically controlled slide rail (2) fixed to the upper end of the frame (1), a second electrically controlled slide rail (3) fixed on the sliding part of the first electrically controlled slide rail (2), the second electrically controlled slide rail (3) being perpendicular to the first electrically controlled slide rail (2), a third electrically controlled slide rail (4) fixed on the sliding part of the second electrically controlled slide rail (3), the third electrically controlled slide rail (4) being vertically arranged, and the plasma cutter (6) being fixed on the slide base (5) of the third electrically controlled slide rail (4).

3. The thin-walled blade plasma cutting device according to claim 1, characterized in that, The lower end of the inlet pipe (8) is bent toward the cutting head of the plasma cutter (6).

4. The thin-walled blade plasma cutting apparatus according to claim 1, characterized in that, The post-filter includes an adsorption purifier (9) whose inlet is connected to the upper outlet of the pump body (7). A wet purifier (10) is fixed at the upper end of the adsorption purifier (9). The outlet of the adsorption purifier (9) is connected to the inlet of the wet purifier (10). The outlet of the wet purifier (10) is connected to one end of the connecting pipe (19).

5. The thin-walled blade plasma cutting apparatus according to claim 1, characterized in that, A servo motor (26) is fixed inside the fixed block (20). The output shaft of the servo motor (26) is concentrically fixedly connected to the turntable (11). The lower end of the turntable (11) is rotatably and sealedly connected to the upper end of the fixed block (20). The outer edge of the turntable (11) is rotatably and sealedly contacted with the inner edge of the inlet pipe (8).

6. The thin-walled blade plasma cutting apparatus according to claim 1, characterized in that, Both ends of the magnetic suction plate (12) are fixed with arc-shaped guide rods (13), and the sleeve rod (14) is slidably sleeved on the outside of the guide rod (13), with the sleeve rod (14) and the guide rod (13) being concentric.

7. The thin-walled blade plasma cutting apparatus according to claim 1, characterized in that, When the perforation is concentric with the upper port of the large groove (21), the upper filter cylinder (16), the lower filter cylinder (24), and the stepped groove above the large groove (21) are concentric.

8. The thin-walled blade plasma cutting apparatus according to claim 1, characterized in that, The upper end of the lower filter cylinder (24) is concentrically fixed with a retaining ring (27), and the retaining ring (27) and the steps of the stepped groove are connected by an arc spring (25).

9. The thin-walled blade plasma cutting apparatus according to claim 1, characterized in that, The driving component includes a motor (17) fixed inside the inlet pipe (8), a gear (18) is concentrically fixed on the output shaft of the motor (17), and an arc-shaped rack (15) is concentrically fixed on the outside of the sleeve rod (14). When the through hole is concentric with the upper port of the large groove (21), the gear (18) meshes with the adjacent rack (15).

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