An angle steel tower angle steel plasma cutting system

Abstract

The application relates to the technical field of plasma cutting, and discloses a corner steel tower corner steel plasma cutting system, which comprises a main body, the main body comprises a clamping assembly, the outer portion of the clamping assembly is provided with a protection mechanism, the clamping assembly is used for clamping and fixing a corner steel, and the corner steel penetrates the clamping assembly and the protection mechanism; the protection mechanism comprises a supporting ring fixedly connected to the outer side of the clamping assembly, the outer portion of the supporting ring is rotationally connected with an outer convex ring, and the outer portion of the outer convex ring is provided with a grinding roller used for grinding a corner steel cutting port; the grinding roller is used for scraping and treating a corner steel cutout, the slag and burrs at the corner steel cutout position are removed, the flatness of the corner steel cutout position is ensured, the cutout quality of the corner steel is improved, and during the treatment process, the rotation of the grinding roller is controlled, different cutting edges of the grinding roller are switched, damage caused by long-time scraping of a single cutting edge is avoided, and the service life of the grinding roller and the slag and burr removal effect of the grinding roller are improved.

Description

Technical Field

[0001] This invention relates to the field of plasma cutting technology, specifically to a plasma cutting system for angle steel towers. Background Technology

[0002] During the construction of the angle steel tower, it is necessary to use a plasma cutting system to cut the angle steel according to its structural characteristics to ensure that the length of the angle steel meets the specifications. Since the angle steel is a right-angled steel material, in order to ensure the cutting effect, the cutting time at the right angle position needs to be increased during the cutting process using the plasma cutting gun. This can easily result in excessively thick slag and a large number of burrs at the right angle position, thus affecting the cutting effect.

[0003] Chinese patent CN216802051U discloses an online plasma cutting device for steel plates, including a frame, a guide rod, a lead screw, a cutting head mounting bracket, a transverse motor, and a plasma cutting head. The cutting head mounting bracket is equipped with a plasma cutting head, and two plasma cutting heads are arranged side by side along the length of the frame. By adopting a dual plasma cutting head design, the two plasma cutting heads form an angle. One plasma cutting head is used to cut the plate head, and the other plasma cutting head is used to clean the oxide slag on the cut. Cutting and cleaning are performed simultaneously, and the cut does not require manual cleaning, thus improving the production efficiency of the production line.

[0004] Although setting two cutting heads can reduce slag at the cut to some extent, the second cutting head is also prone to generating slag during processing, resulting in incomplete slag removal. Furthermore, during plasma cutting of angle steel, the first cutting head needs to increase the cutting time at the right angle of the angle steel, which leads to the second cutting head acting on the corners for an extended period. This can easily cause the corners to overheat and deform, affecting the cutting quality. In addition, setting two cutting heads greatly increases the energy loss of plasma cutting and increases the cutting cost. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an angle steel tower plasma cutting system that offers advantages such as stable angle steel cut treatment, effectively reducing the impact of slag or burrs at right angle positions, and improving cutting quality.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An angle steel tower plasma cutting system includes a main body, the main body includes a clamping assembly, and a protective mechanism is provided on the outside of the clamping assembly. The clamping assembly is used to clamp and fix the angle steel, and the angle steel penetrates the clamping assembly and the protective mechanism.

[0008] The protective mechanism includes a support ring fixedly connected to the outside of the clamping assembly, an outer protruding ring rotatably connected to the outside of the support ring, and a grinding roller for grinding the cutting end of the angle steel is provided on the outside of the outer protruding ring.

[0009] The support ring has an internal air guiding chamber, the outer convex ring has an internal air extraction chamber and a connecting chamber, and a connecting port for communication is provided between the air extraction chamber and the connecting chamber. A connecting air pipe is fixedly connected to the outside of the connecting chamber, and a sealing block is fixedly connected to the outside of the support ring. The sealing block is movably connected inside the connecting chamber and is used to alternately seal the connecting port of the air extraction chamber and the connecting air pipe. An air extraction hole extending to the outside is provided on the outside of the air extraction chamber.

[0010] Preferably, the main body further includes a cutting unit for plasma cutting. The cutting unit includes a plasma cutting gun, which is drivably mounted above the clamping assembly. The clamping assembly includes a rotating ring, and clamping claws are movably connected inside the rotating ring. The clamping claws are used to fix and clamp the angle steel. The rotating ring is drivably mounted inside the clamping assembly and is used to adjust the angle of the angle steel cutting surface.

[0011] Preferably, the clamping assembly has a fan inside, one side of the fan is connected to the air guide chamber, two sets of electrical control blocks are provided outside the sealing block, and a trigger block is provided inside the outer convex ring. The trigger block alternately contacts the two sets of electrical control blocks. The electrical control blocks are electrically connected to the fan, and the two sets of electrical control blocks are used to control the direction of the fan.

[0012] Preferably, the outer convex ring is fixedly connected to an upper track and a lower track, and the two ends of the grinding roller are movably connected to the inside of the upper track and the lower track, respectively. A drive motor is provided on the outside of the upper track, and a transmission mechanism is provided between the drive motor and the grinding roller. The drive motor controls the grinding roller to move left and right on the upper track and the lower track through the transmission mechanism.

[0013] Preferably, the upper track has an upper guide groove inside, and the transmission mechanism includes a drive screw fixedly connected to the output end of the drive motor. The drive screw is threadedly connected to a screw slider, which is slidably connected inside the upper guide groove. A driven gear is rotatably connected to the bottom of the screw slider. A fixed rack is meshed with the driven gear and fixedly installed inside the upper guide groove. A limit slider is sleeved on the outside of the driven gear and slidably connected inside the upper guide groove. A central gear is fixedly connected to the bottom of the driven gear. A connecting gear is meshed with the outside of the central gear. An external gear ring is meshed with the outside of the connecting gear and fixedly installed on the top of the grinding roller. The connecting gear is rotatably connected to the bottom of the limit slider.

[0014] Preferably, the grinding roller includes a grinding blade assembly and a support tube. A partition is fixedly connected between the grinding blade assembly and the support tube. The support tube and the grinding blade assembly are coaxially connected. Several diversion holes are opened on the outside of the support tube. A through connecting hole is opened on the grinding blade assembly. The connecting hole and the diversion hole are used to connect the inner cavity of the support tube with the outside.

[0015] Preferably, the grinding roller is composed of several grinding blade groups fixedly connected together. The cutting edges of any two adjacent grinding blade groups are misaligned. Each grinding blade group has a connecting hole. An upper seat block is fixedly connected to the top of the grinding blade group and the support tube. A lower seat block is fixedly connected to the lower end of the grinding blade group and the support tube. The lower seat block is connected to the inner cavity of the support tube.

[0016] Preferably, the lower track has a lower guide groove inside, and an annular air guide pipe is provided inside the lower track. Guide wheels for rotation guidance are provided on both sides of the air guide pipe. The outside of the air guide pipe is fixedly connected to the connecting air pipe. A positioning slider is fixedly connected to the section of the air guide pipe inside the lower guide groove. The positioning slider is slidably connected inside the lower guide groove. A connecting air nozzle is fixedly connected to the top of the positioning slider. The connecting air nozzle is inserted into the bottom of the support pipe. The positioning slider and the connecting air nozzle are used to connect the inner cavity of the air guide pipe and the support pipe. The other end of the connecting air pipe is used to connect the connecting cavity.

[0017] The beneficial effects of this invention are:

[0018] 1. This angle steel tower plasma cutting system, through the setting of the rotating ring of the clamping component, controls the position of the rotating ring during the cutting process to keep the cutting edge of the angle steel perpendicular to the plasma cutting gun, so that the plasma cutting gun always cuts the two sides of the angle steel perpendicularly, thereby effectively improving the cutting effect of the angle steel. Through two perpendicular cuts, it is also more convenient for the plasma cutting gun to cut the right angle position of the angle steel, thus effectively ensuring the cutting quality of the angle steel.

[0019] 2. This angle steel tower plasma cutting system controls the grinding roller to move laterally along the upper track, scraping the angle steel cut to remove slag and burrs, ensuring the flatness of the cut and improving the quality of the angle steel cut. During the process, the grinding roller rotates synchronously. By controlling the rotation of the grinding roller, different cutting edges are switched for cutting, avoiding damage caused by prolonged scraping with a single cutting edge, which would result in incomplete removal of slag or burrs. This improves the service life of the grinding roller and its effectiveness in removing slag and burrs.

[0020] 3. This angle steel tower plasma cutting system, through the cooperation of grinding rollers and air guide pipes, achieves simultaneous airflow at the cut position during the grinding roller's cutting and scraping of the angle steel. This not only cools the angle steel cut, preventing damage caused by continuous high temperatures, but also uses airflow to blow away slag or burr fragments generated by the grinding blades, further ensuring the effectiveness of the angle steel cut treatment. This significantly improves the quality of angle steel plasma cutting, allowing the cut angle steel to be directly used for angle steel tower assembly, reducing subsequent processing hassles and thus improving overall work efficiency. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of the plasma cutting system of the present invention;

[0022] Figure 2 This is a schematic diagram of the main body and main clamping plate structure of the present invention;

[0023] Figure 3 This is a schematic diagram showing the installation of the main clamping plate, cutting unit, and protective mechanism of the present invention;

[0024] Figure 4 This is a schematic diagram showing the connection between the clamping assembly, rotating ring, and clamping claw of the present invention;

[0025] Figure 5 This is a schematic diagram of the protective mechanism structure of the present invention;

[0026] Figure 6 This is a cross-sectional schematic diagram of the protective mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram showing the positions of the electronic control block and the trigger block of the present invention;

[0028] Figure 8 This is a schematic diagram of the air duct structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the grinding roller and transmission mechanism of the present invention;

[0030] Figure 10 This is a schematic cross-sectional view of the grinding roller of the present invention;

[0031] Figure 11 This is a schematic diagram of a single grinding tool assembly according to the present invention;

[0032] Figure 12 This is a schematic diagram showing the connection between the transmission mechanism and the grinding roller of the present invention.

[0033] In the diagram: 1. Main body; 2. Cutting unit; 21. Plasma cutting gun; 3. Clamping assembly; 31. Rotating ring; 32. Clamping claw; 4. Protective mechanism; 5. Angle steel;

[0034] 41. Support ring; 42. Outer convex ring; 43. Upper rail; 44. Lower rail; 45. Drive motor; 46. Grinding roller; 47. Air guide pipe; 48. Guide wheel; 49. Transmission mechanism;

[0035] 411. Air guide chamber; 412. Blocking block; 413. Electrical control block; 414. Trigger block; 421. Suction chamber; 422. Suction hole; 423. Connecting chamber; 431. Upper guide groove; 432. Fixed rack; 441. Lower guide groove; 461. Grinding tool assembly; 462. Support tube; 463. Partition plate; 464. Diverter hole; 465. Lower seat block; 466. Upper seat block; 471. Connecting air pipe; 472. Positioning slider; 473. Connecting air nozzle; 491. Drive screw; 492. Screw slider; 493. Driven gear; 494. Limit slider; 495. Center gear; 496. Connecting gear; 497. External gear ring. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1

[0038] Please see Figure 1 - Figure 12 An angle steel tower plasma cutting system includes a main body 1, the main body 1 includes a clamping assembly 3, and a protective mechanism 4 is provided on the outside of the clamping assembly 3. The clamping assembly 3 is used to clamp and fix the angle steel 5, and the angle steel 5 penetrates the clamping assembly 3 and the protective mechanism 4.

[0039] The protective mechanism 4 includes a support ring 41 fixedly connected to the outside of the clamping assembly 3. An outer protruding ring 42 is rotatably connected to the outside of the support ring 41. A grinding roller 46 for grinding the cutting end of the angle steel 5 is provided on the outside of the outer protruding ring 42.

[0040] The support ring 41 has an air guide cavity 411 inside, the outer convex ring 42 has an air extraction cavity 421 and a connecting cavity 423 inside, and a connecting port for communication is provided between the air extraction cavity 421 and the connecting cavity 423. A connecting air pipe 471 is fixedly connected to the outside of the connecting cavity 423. A sealing block 412 is fixedly connected to the outside of the support ring 41. The sealing block 412 is movably connected inside the connecting cavity 423. The sealing block 412 is used to alternately seal the connecting port of the air extraction cavity 421 and the connecting air pipe 471. An air extraction hole 422 extending to the outside is provided on the outside of the air extraction cavity 421.

[0041] A driving unit is provided between the outer convex ring 42 and the support ring 41. The driving unit includes, but is not limited to, electromagnetic drive. The driving unit is used to control the outer convex ring 42 to rotate outside the support ring 41, with a single rotation angle of 180°.

[0042] It should be noted that the clamping assembly 3 includes a main clamping plate and a secondary clamping plate, and the protective mechanism 4 is located outside the main clamping plate.

[0043] The main body 1 also includes a control unit, a gantry, a feeding rail and a feeding slide. Angle steel 5 is placed between the clamping assembly 3 and the feeding slide. By driving the feeding slide, the feeding slide pushes the angle steel 5 to move inside the clamping assembly 3. When the cutting position is determined, the main clamping plate and the auxiliary clamping plate are controlled to clamp and fix the angle steel 5, and then plasma cutting is performed.

[0044] refer to Figures 2-4 In an optional embodiment, the main body 1 further includes a cutting unit 2 for plasma cutting. The cutting unit 2 includes a plasma cutting gun 21, which is drivably mounted above the clamping assembly 3. The clamping assembly 3 includes a rotating ring 31, and a clamping claw 32 is movably connected inside the rotating ring 31. The clamping claw 32 is used to fix and clamp the angle steel 5. The rotating ring 31 is drivably mounted inside the clamping assembly 3 and is used to adjust the cutting angle of the angle steel 5.

[0045] It should be noted that the cutting unit 2 is located between the main clamping plate and the auxiliary clamping plate, and the cutting unit 2 can move laterally on the top of the gantry.

[0046] During the cutting process, the plasma cutting gun 21 is adjusted to reach the specified height, then the plasma cutting gun 21 is started, and the cutting unit 2 is controlled to move laterally to complete the cutting operation of the angle steel 5.

[0047] Specifically, during the clamping process, the clamping claw 32 is controlled to fix the angle steel 5, the clamping claw 32 performs three-point positioning on the angle steel 5, and a second cutting is performed during the cutting process.

[0048] Before cutting, the corner of the angle steel 5 to be cut is kept horizontal, and the plasma cutting gun 21 and the corner to be cut are kept vertical.

[0049] During cutting, the plasma cutting gun 21 is started, and the cutting unit 2 is driven to move laterally to complete the single-sided cutting of the angle steel 5.

[0050] When the single-sided cutting is completed, the control cutting unit 2 is reset, and then the control rotating ring 31 is rotated 90° so that the other side of the angle steel 5 is in a horizontal state. The above actions are repeated to complete the cutting of the angle steel 5.

[0051] Both cuts are made by cutting from the corner of angle steel 5 towards the right angle position, thus avoiding a rapid temperature rise at the right angle position in a short period of time, which would cause the cut to deform due to high temperature and improve the cutting quality.

[0052] Furthermore, by adjusting the position of the rotating ring 31 of the clamping component 3 during the cutting process, the cutting edge of the angle steel 5 is controlled to be perpendicular to the plasma cutting gun 21, so that the plasma cutting gun 21 always cuts the two side plates of the angle steel 5 perpendicularly, thereby effectively improving the cutting effect of the angle steel 5. Through two perpendicular cuts, it is also more convenient for the plasma cutting gun 21 to cut the right angle position of the angle steel 5, thereby effectively ensuring the cutting quality of the angle steel 5.

[0053] refer to Figures 5-7 In an optional embodiment, a fan is provided inside the clamping assembly 3, and one side of the fan's air outlet is connected to the air guide cavity 411. Two sets of electronic control blocks 413 are provided outside the sealing block 412, and a trigger block 414 is provided inside the outer protruding ring 42. The trigger block 414 alternately contacts the two sets of electronic control blocks 413. The electronic control blocks 413 are electrically connected to the fan, and the two sets of electronic control blocks 413 are used to control the direction of the fan.

[0054] It should be noted that the air outlet on the other side of the fan is connected to the filter unit. When the air guide chamber 411 is connected to the air extraction chamber 421 through the connecting chamber 423, the sealing block 412 is in a sealed connection state with the air pipe 471. When the fan rotates, it produces an air extraction effect on the air guide chamber 411, thereby causing the air extraction chamber 421 to produce a suction effect on the outside through the air extraction hole 422.

[0055] When the outer convex ring 42 rotates 180°, the sealing block 412 is in the state of sealing the connection between the air extraction chamber 421 and the connecting chamber 423, and the air guide chamber 411 is connected to the connecting air pipe 471 through the connecting chamber 423.

[0056] Furthermore, when the trigger block 414 contacts another set of electronic control blocks 413, the fan rotates in the opposite direction, thereby producing a blowing effect on the air guide chamber 411. The air guide chamber 411 blows airflow into the connecting air pipe 471 through the connecting chamber 423.

[0057] When the angle steel 5 is being cut, the air guide chamber 411 is connected to the air extraction chamber 421. The fan produces a suction effect and uses the air extraction hole 422 to extract the harmful gases generated during the cutting process, reducing the amount of harmful gases directly discharged into the air. The gas extracted by the fan is processed by the filter unit of the air outlet on the other side to reduce the harmful components before being discharged, thereby reducing the pollution from plasma cutting.

[0058] When the cutting is completed, drive the outer convex ring 42 to rotate half a turn. At this time, control the grinding roller 46 to grind the cut of the angle steel 5, reduce the slag and burrs at the cut of the angle steel 5, and improve the flatness of the cut of the angle steel 5.

[0059] refer to Figure 5 and Figure 6 In one optional embodiment, an upper rail 43 and a lower rail 44 are fixedly connected to the outside of the outer convex ring 42. The two ends of the grinding roller 46 are movably connected inside the upper rail 43 and the lower rail 44, respectively. A drive motor 45 is provided outside the upper rail 43. A transmission mechanism 49 is provided between the drive motor 45 and the grinding roller 46. The drive motor 45 controls the grinding roller 46 to move left and right on the upper rail 43 and the lower rail 44 through the transmission mechanism 49.

[0060] It should be noted that during the grinding process, the drive motor 45 is started, and the drive motor 45 drives the grinding roller 46 to move through the transmission mechanism 49. The grinding roller 46 is used to scrape the cut of the angle steel 5, so that the slag or burrs generated during the cutting process are removed.

[0061] Furthermore, after the cutting is completed, the position of the two angle steel sections 5 is adjusted so that the cuts of the two angle steel sections 5 are respectively attached to both sides of the grinding roller 46. When the grinding roller 46 moves laterally on the upper track 43 and the lower track 44, the grinding of the cuts of the two angle steel sections 5 is completed at the same time, thereby improving the cutting efficiency of the angle steel 5 and reducing the trouble of handling the tail end cuts separately.

[0062] refer to Figure 9 and Figure 12 In an optional embodiment, an upper guide groove 431 is provided inside the upper track 43. The transmission mechanism 49 includes a drive screw 491 fixedly connected to the output end of the drive motor 45. A screw slider 492 is threadedly connected to the outside of the drive screw 491. The screw slider 492 is slidably connected inside the upper guide groove 431. A driven gear 493 is rotatably connected to the bottom of the screw slider 492. A fixed rack 432 is meshed with the outside of the driven gear 493. The fixed rack 432 is fixedly installed on... Inside the upper guide groove 431, a limiting slider 494 is sleeved on the outside of the driven gear 493. The limiting slider 494 is slidably connected inside the upper guide groove 431. A central gear 495 is fixedly connected to the bottom of the driven gear 493. A connecting gear 496 is meshed with the outside of the central gear 495. An external gear ring 497 is meshed with the outside of the connecting gear 496. The external gear ring 497 is fixedly installed on the top of the grinding roller 46. The connecting gear 496 is rotatably connected to the bottom of the limiting slider 494.

[0063] It should be noted that during the grinding process, the drive motor 45 drives the drive screw 491 to rotate, and the drive screw 491 drives the screw slider 492 to slide inside the upper guide groove 431. When the screw slider 492 slides, the screw slider 492 drives the driven gear 493 and the central gear 495 to move laterally. During the movement of the driven gear 493, under the action of the fixed rack 432, the driven gear 493 generates rotational motion, which drives the central gear 495 to rotate. The central gear 495 drives the outer gear ring 497 to rotate through the connecting gear 496, and the outer gear ring 497 drives the grinding roller 46 to rotate.

[0064] Therefore, when the grinding roller 46 moves laterally along the upper track 43, the grinding roller 46 scrapes the cut of the angle steel 5 to remove slag and burrs from the cut of the angle steel 5. At the same time, the grinding roller 46 rotates. By controlling the rotation of the grinding roller 46, different cutting edges of the grinding roller 46 are switched for cutting, avoiding damage caused by scraping with a single cutting edge for a long time, which would result in incomplete scraping of slag or burrs. This improves the service life of the grinding roller 46 and the removal effect of the grinding roller 46 on slag and burrs.

[0065] refer to Figure 10 and Figure 11 In an optional embodiment, the grinding roller 46 includes a grinding blade assembly 461 and a support tube 462. A partition 463 is fixedly connected between the grinding blade assembly 461 and the support tube 462. The support tube 462 and the grinding blade assembly 461 are coaxially connected. A plurality of diversion holes 464 are provided on the outside of the support tube 462. The grinding blade assembly 461 is provided with a through-hole. The through-hole and the diversion holes 464 are used to connect the inner cavity of the support tube 462 with the outside.

[0066] The lower track 44 has a lower guide groove 441 inside, and an annular air guide pipe 47 is provided inside the lower track 44. Guide wheels 48 for rotation guidance are provided on both sides of the air guide pipe 47. The outside of the air guide pipe 47 is fixedly connected to the connecting air pipe 471. The section of the air guide pipe 47 located inside the lower guide groove 441 is fixedly connected to a positioning slider 472. The positioning slider 472 is slidably connected inside the lower guide groove 441. A connecting air nozzle 473 is fixedly connected to the top of the positioning slider 472. The connecting air nozzle 473 is inserted into the bottom of the support pipe 462. The positioning slider 472 and the connecting air nozzle 473 are used to connect the inner cavity of the air guide pipe 47 and the inner cavity of the support pipe 462. The other end of the connecting air pipe 471 is used to connect the connecting cavity 423.

[0067] It should be noted that during the cutting process, the connecting cavity 423 is connected to the support pipe 462 through the connecting air pipe 471 and the air guide pipe 47. At this time, the fan blows air into the connecting cavity 423 through the air guide cavity 411. The airflow enters the support pipe 462 through the air guide pipe 47, and then enters between several partitions 463 under the action of several diversion holes 464. Finally, it is discharged through the gap between the cutting edges of the grinding blade assembly 461. This achieves the effect of simultaneously generating airflow to blow on the cutting position during the cutting and scraping of the angle steel 5 by the grinding roller 46. This not only achieves the effect of cooling the cutting edge of the angle steel 5 and avoiding damage to the cutting edge of the angle steel 5 caused by continuous high temperature, but also uses the airflow to blow away the slag or burr fragments generated by the grinding blade assembly 461 scraping the cutting edge, further ensuring the effect of the cutting of the angle steel 5, effectively improving the quality of the plasma cutting of the angle steel 5, so that the cut angle steel 5 can be directly used for the assembly of angle steel towers, reducing the trouble of subsequent processing, and thus improving the overall work efficiency.

[0068] refer to Figures 9-11 In one optional embodiment, the grinding roller 46 is formed by a plurality of grinding blade sets 461 fixedly connected to the outside. The cutting edges of any two adjacent grinding blade sets 461 are misaligned. Each grinding blade set 461 is provided with a connecting hole. An upper seat block 466 is fixedly connected to the top of the grinding blade set 461 and the support tube 462. A lower seat block 465 is fixedly connected to the lower end of the grinding blade set 461 and the support tube 462. The lower seat block 465 communicates with the inner cavity of the support tube 462.

[0069] It should be noted that by setting several grinding blade groups 461 with staggered cutting edges, the connecting holes of adjacent grinding blade groups 461 are staggered, thereby ensuring the uniformity of the air outlet position of the grinding roller 46 and ensuring that the airflow can be blown out evenly during the rotation of the grinding roller 46, thereby further improving the airflow treatment effect on the cut of the angle steel 5.

[0070] 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 system for plasma cutting of angle steel tower angle steel, comprising a main body (1), characterized in that: The main body (1) comprises a clamping assembly (3), the outer side of the clamping assembly (3) is provided with a protection mechanism (4), the clamping assembly (3) is used for clamping a fixed angle steel (5), and the angle steel (5) penetrates through the clamping assembly (3) and the protection mechanism (4); The protection mechanism (4) comprises a supporting ring (41) fixedly connected to the outer side of the clamping assembly (3), the outer side of the supporting ring (41) is rotatably connected with an outer convex ring (42), and the outer side of the outer convex ring (42) is provided with a grinding roller (46) used for grinding a cutting port of the angle steel (5); The inner side of the supporting ring (41) is provided with a gas guide cavity (411), the inner side of the outer convex ring (42) is provided with an air extraction cavity (421) and a connecting cavity (423), the air extraction cavity (421) and the connecting cavity (423) are provided with a connecting port used for communication, the outer side of the connecting cavity (423) is fixedly connected with a connecting air pipe (471), the outer side of the supporting ring (41) is fixedly connected with a blocking block (412), the blocking block (412) is movably connected to the inner side of the connecting cavity (423), and the blocking block (412) is used for alternately sealing the connecting port of the air extraction cavity (421) and the connecting air pipe (471); and the outer side of the air extraction cavity (421) is provided with an air extraction hole (422) penetrating to the outer side; The outer side of the outer convex ring (42) is fixedly connected with an upper rail (43) and a lower rail (44), both ends of the grinding roller (46) are movably connected to the inner sides of the upper rail (43) and the lower rail (44) respectively, the outer side of the upper rail (43) is provided with a driving motor (45), a transmission mechanism (49) is arranged between the driving motor (45) and the grinding roller (46), and the driving motor (45) controls the grinding roller (46) to move leftward and rightward on the upper rail (43) and the lower rail (44) through the transmission mechanism (49); The inner side of the upper rail (43) is provided with an upper guide groove (431), and the transmission mechanism (49) comprises a driving screw rod (491) fixedly connected to the output end of the driving motor (45), a screw rod sliding block (492) threadedly connected to the outer side of the driving screw rod (491), the screw rod sliding block (492) being slidably connected to the inner side of the upper guide groove (431), a driven gear (493) rotatably connected to the bottom of the screw rod sliding block (492), a fixed rack (432) meshingly connected to the outer side of the driven gear (493), the fixed rack (432) being fixedly installed in the inner side of the upper guide groove (431), a limiting sliding block (494) sleeved to the outer side of the driven gear (493), the limiting sliding block (494) being slidably connected to the inner side of the upper guide groove (431), a central gear (495) fixedly connected to the bottom of the driven gear (493), a connecting gear (496) meshingly connected to the outer side of the central gear (495), an outer gear ring (497) meshingly connected to the outer side of the connecting gear (496), and the outer gear ring (497) being fixedly installed at the top end of the grinding roller (46), the connecting gear (496) being rotatably connected to the bottom of the limiting sliding block (494). The polishing roller (46) comprises a polishing cutter group (461) and a supporting tube (462), a partition plate (463) is fixedly connected between the polishing cutter group (461) and the supporting tube (462), the supporting tube (462) and the polishing cutter group (461) are coaxially connected, a plurality of shunt holes (464) are formed in the outer portion of the supporting tube (462), and the polishing cutter group (461) is provided with a through communication hole; the communication hole and the shunt holes (464) are used for communicating the inner cavity of the supporting tube (462) with the outside.

2. The angle steel tower angle steel plasma cutting system according to claim 1, characterized in that: The main body (1) further comprises a cutting unit (2) for plasma cutting, the cutting unit (2) comprises a plasma cutting torch (21), the plasma cutting torch (21) is drivably mounted above the clamping assembly (3), the clamping assembly (3) comprises a rotating ring (31), the rotating ring (31) is movably connected with a clamping claw (32) in the inner portion, the clamping claw (32) is used for fixing the angle steel (5), the rotating ring (31) is drivably mounted in the inner portion of the clamping assembly (3), and the rotating ring (31) is used for adjusting the angle of the cutting surface of the angle steel (5).

3. The angle steel tower angle steel plasma cutting system according to claim 1, characterized in that: The inner portion of the clamping assembly (3) is provided with a fan, one side air outlet of the fan is communicated with the air guide cavity (411), the outer portion of the blocking block (412) is provided with two groups of electric control blocks (413), the inner portion of the outer convex ring (42) is provided with a trigger block (414), the trigger block (414) alternately contacts the two groups of electric control blocks (413), the electric control blocks (413) are electrically connected with the fan, and the two groups of electric control blocks (413) are used for controlling the steering of the fan.

4. The angle steel tower angle steel plasma cutting system according to claim 1, characterized in that: The outer portion of the polishing roller (46) is composed of a plurality of polishing cutter groups (461) fixedly connected, the cutting edges of any two adjacent polishing cutter groups (461) are misaligned, any one polishing cutter group (461) is provided with a communication hole, the top of the polishing cutter group (461) and the supporting tube (462) are fixedly connected with an upper seat block (466), the lower end of the polishing cutter group (461) and the supporting tube (462) are fixedly connected with a lower seat block (465), and the lower seat block (465) communicates with the inner cavity of the supporting tube (462).

5. The angle steel tower angle steel plasma cutting system according to claim 1, characterized in that: The inner portion of the lower rail (44) is provided with a lower guide groove (441), the inner portion of the lower rail (44) is provided with an annular air guide pipe (47), both sides of the air guide pipe (47) are provided with guide wheels (48) for rotating and guiding, the outer portion of the air guide pipe (47) is fixedly connected with a connecting air pipe (471), the air guide pipe (47) is fixedly connected with a positioning sliding block (472) in the inner portion of the lower guide groove (441), the positioning sliding block (472) is slidably connected in the inner portion of the lower guide groove (441), the top of the positioning sliding block (472) is fixedly connected with a connecting air nozzle (473), the connecting air nozzle (473) is inserted into the bottom of the supporting tube (462), the positioning sliding block (472) and the connecting air nozzle (473) are used for communicating the air guide pipe (47) with the inner cavity of the supporting tube (462), and the other end of the connecting air pipe (471) is used for communicating with the connecting cavity (423).

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