Plasma cutting machine for steel structure machining

Abstract

The invention belongs to the technical field of plasma cutting machines, and particularly relates to a plasma cutting machine for steel structure machining. A body is included; a cutting gun; a connecting plate body is mounted at the output end of the machine body; the cutting gun is mounted on the connecting plate body; the cutting gun is connected with the output end of the machine body; a rotating protection component is arranged on the connecting plate body; the rotating protection component comprises a rotating base which is mounted on the connecting plate body; the rotating arc column is connected to the rotating base in a penetrating manner; the rotating arc column is in running fit with the rotating base; the rotating limiting plate is mounted at one end of the rotating arc column; the protective baffle is mounted at the other end of the rotating arc column; an exhaust purification unit is arranged on the protective baffle; the exhaust purification unit comprises a ventilation groove which is formed in the outer wall of the protective baffle and extends to the inner wall; therefore, cutting sparks and slag splashing are effectively blocked, operators are prevented from being burnt, the operation safety and the equipment using effect are improved, and meanwhile the limitation of actual use of the equipment is reduced.

Description

Technical Field

[0001] This invention belongs to the field of plasma cutting machine technology, specifically a plasma cutting machine for steel structure processing. Background Technology

[0002] Plasma cutting machines for steel structure processing are specialized cutting equipment designed for processing steel plates, profiles, and other steel structural components. They use a high-speed, high-temperature gas flow generated by the high-temperature ionization of a plasma arc to melt and blow away the metal, thus achieving cutting. However, during the cutting process, the plasma arc generates strong ultraviolet radiation and high-intensity, high-temperature light. If not properly protected, this can easily burn the operator's eyes and may cause health hazards such as photokeratitis. This not only fails to protect the health of the workers but also reduces the effectiveness of the equipment, making it highly limited in practical use. 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 plasma cutting machine for steel structure processing, which effectively solves the problems in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a plasma cutting machine for steel structure processing, comprising a machine body; a cutting torch; a connecting plate installed at the output end of the machine body; the cutting torch mounted on the connecting plate; the cutting torch connected to the output end of the machine body; a rotating protective component provided on the connecting plate for shielding the cutting area; the rotating protective component includes a rotating base installed on the connecting plate; A rotating arc column is connected through a rotating base; the rotating arc column and the rotating base are rotatably coupled. A rotating limiting plate is installed at one end of the rotating arc column; A protective baffle is installed at the other end of the rotating arc column; the protective baffle is equipped with an exhaust purification unit for purifying and discharging harmful fumes generated during cutting; the exhaust purification unit includes a ventilation slot, which is located on the outer wall of the protective baffle and extends to the inner wall. A re-scraping frequency control mechanism is installed on the protective baffle; the re-scraping frequency control mechanism is used to keep the exhaust purification unit unobstructed; the re-scraping frequency control mechanism includes a T-shaped base, which is installed on the protective baffle.

[0005] Preferably, it includes an arc-shaped spring, which is sleeved on the rotating arc column; one end of the arc-shaped spring is fixedly connected to the rotating limiting plate, and the other end is fixedly connected to the rotating base.

[0006] Preferably, it includes a locking cylinder, which is fixedly connected to the rotating base; A locking slide plate is connected through the locking cylinder; the locking slide plate and the locking cylinder are in sliding engagement. A locking spring is sleeved on a locking cylinder; one end of the locking spring is fixedly connected to a locking slide plate, and the other end is fixedly connected to a locking limit plate; the locking limit plate is fixedly connected to the end of the locking cylinder away from the rotating base.

[0007] Preferably, it includes a filter plate installed on the protective baffle near the cutting torch; the filter plate is connected to the ventilation slot; A purifier is connected to the protective baffle on the side away from the cutting torch; the purifier is connected to a ventilation slot; and a nozzle is installed on the output end of the purifier.

[0008] Preferably, it includes a rotating shaft mounted on the filter plate; the rotating shaft is located inside the ventilation slot; The heat dissipation blades are mounted on the rotating shaft.

[0009] Preferably, it includes a locking slot disposed on the side of the rotating arc column near the locking slide plate; a plurality of locking slots are arranged at equal intervals with respect to the center of the rotating arc column; A locking insert is installed on the side of the locking slide near the locking slot; the locking insert passes through the rotating base and connects to one of the locking slots. Pull ring, installed on the locking slide.

[0010] Preferably, it includes a first bevel tooth, which is mounted on a T-shaped base; The first pulley is mounted on the T-shaped base; the first pulley is rotatably connected to the first bevel gear. The second pulley is connected to the T-shaped base; The transmission belt is connected at both ends to the first pulley and the second pulley, respectively; A rotating gear is mounted on a protective baffle; a second bevel gear is mounted on the rotating gear; the second bevel gear meshes with the first bevel gear. A rotating gear ring is mounted on a rotating base; the rotating gear ring is coaxial with the center of the rotating arc column; the rotating gear ring is meshed with a rotating gear.

[0011] Preferably, it includes a guide turntable mounted on a second pulley; The guide column is installed on the edge of the guide turntable away from the second pulley; A guide base is installed on a T-shaped base; a guide slide column is connected through the guide base, and the two slide in cooperation. A guide block is mounted on a guide slide column; the guide block is located on the side of the guide turntable away from the second pulley; a guide groove is provided through the guide block on the side closer to the guide turntable; the guide column is located in the guide groove, and the two slide in cooperation; A bent rod is installed on the guide block; an elastic telescopic column is connected to the bent rod; the elastic telescopic column is located on the side of the protective baffle closer to the cutting torch; a sloping scraper is connected to the end of the elastic telescopic column closer to the protective baffle; the sloping scraper is in contact with the inner wall of the protective baffle.

[0012] Preferably, a cooling actuator is provided on the protective baffle; the cooling actuator includes a braking base plate, which is mounted on the protective baffle. A brake shaft is connected to a brake base plate; a turbine is installed at the end of the brake shaft; the turbine is located at the nozzle output end; airflow is injected through the nozzle and acts on the turbine; Brake cam, mounted on brake shaft; A limiting base is connected to the brake base plate; a limiting slide pin is connected through the limiting base near the brake cam; the limiting slide pin is slidably engaged with the limiting base; a brake block is connected to the end of the limiting slide pin near the brake cam; a brake slide plate is connected to the end of the limiting slide pin away from the brake cam; the side of the brake block away from the limiting slide pin is located on the rotation path of the brake cam sidewall. A limiting spring is sleeved on a limiting slide post; one end of the limiting spring is fixedly connected to the brake block, and the other end is fixedly connected to the limiting base.

[0013] Preferably, it includes a brake box mounted on a protective baffle; the brake slide plate is fitted into the brake box, and the two slide in cooperation. Cooling gas tank, installed on the protective baffle; The main valve is connected to the brake box; Auxiliary valves are connected to both sides of the brake box; one auxiliary valve is equipped with an air exchange pipe, and the other auxiliary valve is equipped with a connecting pipe; the connecting pipe is connected to the cooling air tank. The air outlet pipe is connected to the main valve at one end and faces the output end of the cutting torch at the other end.

[0014] Compared with the prior art, the beneficial effects of the present invention are: (1) By rotating the protective components, the equipment can not only protect the operator's eyes from the strong ultraviolet rays and high-intensity high-temperature light generated by the plasma arc during the cutting process, but also protect the health of the staff and improve the equipment's performance. Furthermore, due to the number of locking slots, the equipment can flexibly adjust the shielding angle of the protective baffle according to different cutting needs, conditions and cutting positions, further reducing the limitations of the equipment in actual use. The protective baffle is stably locked and does not loosen during use, effectively blocking cutting sparks and molten slag splashes, preventing operator burns and improving work safety. The structure is simple and easy to operate, and it is suitable for cutting different specifications of steel structures. (2) The cooling gas in the cooling gas tank is continuously introduced into the brake box through the cooling actuator and then discharged through the exhaust pipe. It acts on the output end of the cutting torch, which is the cutting position of the steel structure, to control the temperature at the cutting point. The exhaust pipe can select whether to use cooling gas or external gas for heat dissipation. The equipment uses the purified airflow to automatically drive the cooling actuator without external power, so as to achieve precise cooling of the cutting torch and the cutting area, reduce the wear of the cutting torch due to high temperature, and extend the service life of the cutting torch; avoid overheating and deformation of the cutting part, and improve the cutting accuracy and quality of the steel structure; the cooling action and flue gas purification are carried out simultaneously, and the collaborative operation is highly efficient. (3) The exhaust purification unit can guide and purify the harmful gases generated during the cutting process, avoid the harmful gases from affecting the environment of the work area, and also avoid threatening the health and safety of the workers. This improves the use and cutting effect of the equipment, further reduces the limitations of the equipment, and enables the equipment to cope with complex working environments. The active suction effect is formed by the rotation of the heat dissipation blades, which quickly absorbs and concentrates the harmful smoke, and prevents the smoke from spreading to the work area. The smoke absorption and purification are carried out simultaneously, with high purification efficiency. At the same time, the rotation of the blades can assist in heat dissipation. When used with the cooling execution components, the temperature near the protective baffle and the cutting torch is further reduced, the cutting temperature is effectively controlled, and the safety and stability of the equipment are improved. (4) The cleanliness of the protective baffle during use is ensured by the repeated scraping frequency control mechanism, avoiding the adhesion of a large amount of smoke and dust, which affects the protective effect of the protective baffle. At the same time, the service life of the protective baffle is extended, avoiding the need for frequent replacement and maintenance of the protective baffle by the staff, reducing the limitations of the equipment and improving the cutting effect of the equipment on the steel structure. Moreover, the inclined scraper can always be in contact with the inner wall of the protective baffle under the action of the elastic telescopic column. When it encounters the filter plate, the inclined surface of the inclined scraper contacts the side of the filter plate, thereby compressing the elastic telescopic column and putting it in a buffer state, so that the inclined scraper can make good contact with the filter plate and scrape off the dust and impurities adhering to the filter plate. This avoids the filter plate having a lot of impurities adhering to it, which affects the efficiency and effect of the exhaust purification unit. No manual cleaning is required, and the exhaust purification unit is kept unobstructed, reducing the limitations of the actual use of the equipment. The elastic telescopic column ensures that the inclined scraper fits tightly and scrapes thoroughly, avoiding blockage that leads to purification failure and temperature rise, thus improving the stability and service life of the equipment. (5) Pull the pull ring to drive the locking slide plate to slide along the locking cylinder, so that the locking plug disengages from the locking slot and releases the lock on the rotating arc column; rotate the protective baffle to the appropriate blocking angle, release the pull ring, and the locking spring pushes the locking slide plate to reset, and the locking plug inserts into the corresponding locking slot to complete the positioning; the arc spring provides the reset torque, which facilitates the rapid return of the protective baffle; when the protective baffle is adjusted to the appropriate use angle and is fixed by the locking plug, it avoids the protective baffle from shaking or dislodging due to non-human factors during use, thus improving the safety of the equipment. At the same time, when the protective baffle is limited, the arc spring that was originally in the buffer state cannot reset, and the resulting elastic force acts on the rotating arc column, thereby strengthening the contact strength and friction between the locking plug and the locking slot, further improving the protective effect and safety of the protective baffle. Attached Figure Description

[0015] 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.

[0016] In the attached diagram: Figure 1 This is one of the schematic diagrams of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cutting torch structure of the present invention; Figure 3 This is a schematic diagram of the locking slot structure of the present invention; Figure 4 This is a cross-sectional view of the ventilation slot of the present invention; Figure 5 This is the second schematic diagram of the overall structure of the present invention; Figure 6 This is a cross-sectional view of the rotating base of the present invention; Figure 7 This is a cross-sectional view of the elastic telescopic column of the present invention; Figure 8 This is a schematic diagram of the rotating arc column structure of the present invention; Figure 9 This is a cross-sectional view of the brake box of the present invention; Figure 10 This is a cross-sectional view of the filter module of the present invention; Figure 11 This is a schematic diagram of the guide groove structure of the present invention; Figure 12 This is a cross-sectional view of the nozzle of the present invention; In the diagram: 1. Body; 2. Cutting torch; 3. Connecting plate; 4. Rotating base; 5. Rotating arc column; 6. Rotating limiting plate; 7. Protective baffle; 8. Ventilation slot; 9. T-shaped base; 10. Arc spring; 11. Locking cylinder; 12. Locking slide; 13. Locking spring; 14. Locking limiting plate; 15. Filter plate; 16. Purifier; 17. Nozzle; 18. Rotating shaft; 19. Heat dissipation blades; 20. Locking slot; 21. Locking insert; 22. Pull ring; 23. First bevel gear; 24. First pulley; 25. Second pulley; 26. Transmission belt; 27. Rotating gear; 28. Second... 29. Bevel gear; 30. Rotating gear ring; 31. Guide turntable; 32. Guide column; 33. Guide base; 34. Guide slide column; 35. Guide cross block; 36. Guide groove; 37. Bending rod; 38. Elastic telescopic column; 39. Inclined scraper; 40. Brake base plate; 41. Brake shaft; 42. Turbine; 43. Brake cam; 44. Limiting base; 45. Limiting slide column; 46. Brake cross block; 47. Brake slide plate; 48. Limiting spring; 49. Brake square box; 50. Cooling air tank; 51. Main valve; 52. Auxiliary valve; 53. Air exchange pipe; 54. Connecting pipe; 55. Air outlet pipe. Detailed Implementation

[0017] 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.

[0018] Implementation examples, by Figures 1 to 12The present invention includes a body 1; a cutting torch 2; a connecting plate 3 installed at the output end of the body 1; the cutting torch 2 installed on the connecting plate 3; the cutting torch 2 connected to the output end of the body 1; a rotating protective component provided on the connecting plate 3 for blocking the cutting area; the rotating protective component includes a rotating base 4 installed on the connecting plate 3; a rotating arc column 5 connected through the rotating base 4; the rotating arc column 5 and the rotating base 4 rotatably engaged; a rotating limiting plate 6 installed at one end of the rotating arc column 5; a protective baffle 7 installed at the other end of the rotating arc column 5; an arc spring 10 sleeved on the rotating arc column 5; one end of the arc spring 10 fixedly connected to the rotating limiting plate 6, and the other end fixedly connected to the rotating base 4; and a locking cylinder 11 fixedly connected to the rotating base 4. The upper part includes: a locking slide plate 12, which is connected to the locking cylinder 11; the locking slide plate 12 and the locking cylinder 11 are in sliding engagement; a locking spring 13, which is sleeved on the locking cylinder 11; one end of the locking spring 13 is fixedly connected to the locking slide plate 12, and the other end is fixedly connected to a locking limit plate 14; the locking limit plate 14 is fixedly connected to the end of the locking cylinder 11 away from the rotating base 4; a locking slot 20, which is located on the side of the rotating arc column 5 near the locking slide plate 12; several locking slots 20 are arranged at equal intervals with the center of the rotating arc column 5 as the reference; a locking insert 21, which is installed on the side of the locking slide plate 12 near the locking slot 20; the locking insert 21 passes through the rotating base 4 and is connected to one of the locking slots 20; and a pull ring 22, which is installed on the locking slide plate 12. Before operation, pulling the pull ring 22 causes the locking slide plate 12 to slide along the locking cylinder 11, disengaging the locking block 21 from the locking slot 20 and releasing the lock on the rotating arc column 5. Rotating the protective baffle 7 to a suitable blocking angle and releasing the pull ring 22 causes the locking spring 13 to push the locking slide plate 12 back to its original position, allowing the locking block 21 to insert into the corresponding locking slot 20 for positioning. The arc spring 10 provides the reset torque, facilitating the rapid return of the protective baffle 7. When the protective baffle 7 is adjusted to a suitable operating angle and fixed by the locking block 21, it prevents the protective baffle 7 from shaking or dislodging due to non-human factors during use, improving the safety of the equipment. Simultaneously, when the protective baffle 7 is fixed, the arc spring 10, which was originally in a buffer state, cannot reset, and the resulting elastic force acts on the rotating arc column 5, thereby strengthening the connection between the locking block 21 and the locking slot 20. The increased contact strength and friction further enhance the protective effect and safety of the protective baffle 7. During operation, the baffle 7 not only protects the operator from the intense ultraviolet radiation and high-intensity light generated by the plasma arc during cutting, preventing eye burns and potential health hazards such as photokeratitis, but also safeguards the health of the workers, thus improving the overall effectiveness of the equipment. Furthermore, the numerous locking slots 20 allow for flexible adjustment of the baffle 7's shielding angle according to different cutting needs, conditions, and positions, further reducing limitations in practical use. This ensures the baffle 7 remains stable and locked, effectively blocking cutting sparks and molten slag, preventing burns to operators, and improving operational safety. The simple structure and convenient operation make it suitable for cutting various steel structures.

[0019] In this embodiment, the protective baffle 7 is equipped with an exhaust purification unit for purifying and discharging harmful fumes generated during cutting. The exhaust purification unit includes a ventilation slot 8, which is disposed on the outer wall of the protective baffle 7 and extends to the inner wall; a filter plate 15, which is installed on the side of the protective baffle 7 near the cutting torch 2; the filter plate 15 is connected to the ventilation slot 8; a purifier 16, which is connected to the side of the protective baffle 7 away from the cutting torch 2; the purifier 16 is connected to the ventilation slot 8; a nozzle 17 is installed on the output end of the purifier 16; a rotating shaft 18 is installed on the filter plate 15; the rotating shaft 18 is located inside the ventilation slot 8; and heat dissipation blades 19 are installed on the rotating shaft 18. By activating the built-in drive source of the rotating shaft 18, the shaft rotates on the filter plate 15, which in turn drives the heat dissipation blades 19 to rotate continuously. The rotation of the blades generates a negative pressure adsorption effect, actively drawing the harmful fumes generated during cutting into the ventilation slot 8. Before entering the ventilation slot 8, the fumes are filtered by the filter plate 15 to remove impurities and debris, preventing them from clogging the ventilation slot 8. The fumes then enter the purifier 16 for further purification. The purified gas is then discharged outwards through the nozzle 17, guiding and purifying the harmful gases generated during the cutting process to prevent them from clogging. The system minimizes the impact on the work area environment while also preventing threats to the health and safety of workers. It improves the usability and cutting effect of the equipment, further reducing the limitations of the equipment and enabling it to cope with complex working environments. By relying on the rotation of the heat dissipation blades 19 to create an active suction effect, it quickly absorbs and concentrates harmful fumes, preventing them from spreading to the work area. Fume absorption and purification are carried out simultaneously, resulting in high purification efficiency. At the same time, the rotation of the blades can assist in heat dissipation. When used in conjunction with the cooling actuator, it further reduces the temperature near the protective baffle 7 and the cutting torch 2, effectively controlling the cutting temperature and improving the safety and stability of the equipment.

[0020] The re-scraping frequency control mechanism of this embodiment is mounted on the protective baffle 7. The re-scraping frequency control mechanism is used to maintain the unobstructed flow of the exhaust purification unit. The re-scraping frequency control mechanism includes a T-shaped base 9 mounted on the protective baffle 7; a first bevel gear 23 mounted on the T-shaped base 9; a first pulley 24 mounted on the T-shaped base 9; the first pulley 24 is rotatably connected to the first bevel gear 23; a second pulley 25 is connected to the T-shaped base 9; a transmission belt 26 has its two ends connected to the first pulley 24 and the second pulley 25 respectively; a rotating gear 27 mounted on the protective baffle 7; a second bevel gear 28 mounted on the rotating gear 27; the second bevel gear 28 meshes with the first bevel gear 23; a rotating gear ring 29 mounted on a rotating base 4; the rotating gear ring 29 is coaxial with the center of the rotating arc column 5; the rotating gear ring 29 meshes with the rotating gear 27; and a guide turntable 30 is mounted on... The guide column 31 is mounted on the second pulley 25 and installed on the edge of the guide turntable 30 away from the second pulley 25. The guide base 32 is mounted on the T-shaped base 9. A guide column 33 is connected through the guide base 32 and the two slide in cooperation. The guide block 34 is mounted on the guide column 33 and is located on the side of the guide turntable 30 away from the second pulley 25. A guide groove 35 is provided through the guide block 34 on the side near the guide turntable 30. The guide column 31 is located in the guide groove 35 and the two slide in cooperation. A bent rod 36 is mounted on the guide block 34. An elastic telescopic column 37 is connected to the bent rod 36. The elastic telescopic column 37 is located on the side of the protective baffle 7 near the cutting torch 2. An inclined scraper 38 is connected to the end of the elastic telescopic column 37 near the protective baffle 7. The inclined scraper 38 contacts the inner wall of the protective baffle 7. When adjusting the protective baffle 7, the rotating gear ring 29 meshes with the rotating gear 27, driving the second bevel gear 28 and the first bevel gear 23 to rotate. This rotation, via the first pulley 24, transmission belt 26, and second pulley 25, drives the guide turntable 30 to rotate. The guide column 31 slides along the guide groove 35, causing the guide block 34 and guide column 33 to move back and forth. Through the bent rod 36 and elastic telescopic column 37, the inclined scraper 38 scrapes against the inner wall of the protective baffle 7, ensuring its cleanliness during use and preventing the adhesion of large amounts of dust that could affect its protective effect. This also extends the service life of the protective baffle 7, avoiding frequent replacement and maintenance by personnel, reducing the equipment's limitations, and improving its cutting effect on steel structures. Under the action of the elastic telescopic column 37, the inclined scraper 38 can always be in contact with the inner wall of the protective baffle 7. When it encounters the filter plate 15, the inclined surface of the scraper 38 contacts the side of the filter plate 15, thereby compressing the elastic telescopic column 37 and putting it in a buffer state. This allows the inclined scraper 38 to make good contact with the filter plate 15, thus scraping away the dust and impurities adhering to the filter plate 15. This prevents the filter plate 15 from having too many impurities adhering to it, which would affect the efficiency and effect of the exhaust purification unit. No manual cleaning is required, and the exhaust purification unit is kept unobstructed, reducing the limitations of the actual use of the equipment. The elastic telescopic column 37 ensures that the inclined scraper 38 fits tightly and scrapes thoroughly, avoiding blockage that could lead to purification failure and temperature rise, thereby improving the stability and service life of the equipment.

[0021] In this embodiment, a cooling actuator is provided on the protective baffle 7. The cooling actuator includes a brake base plate 39, which is mounted on the protective baffle 7; a brake shaft 40, which is connected to the brake base plate 39; a turbine 41 is mounted on the end of the brake shaft 40; the turbine 41 is located at the output end of the nozzle 17; airflow is sprayed through the nozzle 17 and acts on the turbine 41; a brake cam 42 is mounted on the brake shaft 40; a limiting base 43 is connected to the brake base 39; a limiting slide post 44 is connected through the limiting base 43 near the brake cam 42; the limiting slide post 44 is slidably engaged with the limiting base 43; a brake cross block 45 is connected to the end of the limiting slide post 44 near the brake cam 42; a brake slide plate 46 is connected to the end of the limiting slide post 44 away from the brake cam 42; and a brake cross block 45 is connected to the end of the limiting slide post 44 away from the brake cam 42. One side of the limiting slide column 44 is located on the rotation path of the side wall of the brake cam 42; the limiting spring 47 is sleeved on the limiting slide column 44; one end of the limiting spring 47 is fixedly connected to the brake cross block 45, and the other end is fixedly connected to the limiting base 43; the brake square box 48 is installed on the protective baffle 7; the brake slide plate 46 is fitted into the brake square box 48, and the two slide together; the cooling air tank 49 is installed on the protective baffle 7; the main valve 50 is connected to the brake square box 48; the auxiliary valves 51 are connected to both sides of the brake square box 48; one of the auxiliary valves 51 is equipped with an air exchange pipe 52, and the other auxiliary valve 51 is equipped with a connecting pipe 53; the connecting pipe 53 is connected to the cooling air tank 49; the air outlet pipe 54 is connected at one end to the main valve 50, and the other end faces the output end of the cutting torch 2; The clean airflow discharged from the purifier 16 is sprayed through the nozzle 17 to drive the turbine 41 to rotate, which in turn drives the brake shaft 40 and the brake cam 42 to rotate. The brake cam 42 intermittently pushes the brake block 45, causing the limit slide 44 and the brake slide plate 46 to move back and forth, so that the limit spring 47 is constantly in a buffering and reset state, and the brake slide plate 46 moves back and forth in the brake box 48. By controlling the opening and closing of the main valve 50 and the auxiliary valve 51, the cooling gas in the cooling gas tank 49 is continuously introduced into the brake box 48 under the action of the connecting pipe 53, and then discharged through the exhaust pipe 54. The air is released and acts on the output end of the cutting torch 2, which is the cutting position of the steel structure, to control the temperature at the cutting point. The air exchange pipe 52 allows the exhaust pipe 54 to select whether to use cooling gas or external gas for heat dissipation. This allows the equipment to automatically drive the cooling components using the purified airflow, without the need for external power. This achieves precise cooling of the cutting torch 2 and the cutting area, reduces the wear and tear on the cutting torch 2 caused by high temperatures, and extends the service life of the cutting torch 2. It also prevents overheating and deformation of the cutting part, improving the cutting accuracy and quality of the steel structure. The cooling action and flue gas purification are carried out simultaneously, resulting in high efficiency of coordinated operation.

[0022] 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.

[0023] 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 plasma cutting machine for steel structure processing, comprising a machine body and a cutting torch; characterized in that: A connecting plate is installed at the output end of the machine body; the cutting torch is installed on the connecting plate; the cutting torch is connected to the output end of the machine body; a rotating protective component is provided on the connecting plate to block the cutting area; the rotating protective component includes a rotating base, which is installed on the connecting plate. A rotating arc column is connected through a rotating base; the rotating arc column and the rotating base are rotatably coupled. A rotating limiting plate is installed at one end of the rotating arc column; A protective baffle is installed at the other end of the rotating arc column; the protective baffle is equipped with an exhaust purification unit for purifying and discharging harmful fumes generated during cutting; the exhaust purification unit includes a ventilation slot, which is located on the outer wall of the protective baffle and extends to the inner wall. A re-scraping frequency control mechanism is installed on the protective baffle; the re-scraping frequency control mechanism is used to keep the exhaust purification unit unobstructed; the re-scraping frequency control mechanism includes a T-shaped base, which is installed on the protective baffle.

2. The plasma cutting machine for steel structure processing according to claim 1, characterized in that: It includes an arc-shaped spring, which is sleeved on the rotating arc column; one end of the arc-shaped spring is fixedly connected to the rotating limiting plate, and the other end is fixedly connected to the rotating base.

3. The plasma cutting machine for steel structure processing according to claim 1, characterized in that: Includes a locking cylinder, which is fixedly connected to the rotating base; A locking slide plate is connected through the locking cylinder; the locking slide plate and the locking cylinder are in sliding engagement. A locking spring is sleeved on a locking cylinder; one end of the locking spring is fixedly connected to a locking slide plate, and the other end is fixedly connected to a locking limit plate; the locking limit plate is fixedly connected to the end of the locking cylinder away from the rotating base.

4. The plasma cutting machine for steel structure processing according to claim 1, characterized in that: Includes a filter plate, installed on the protective baffle near the cutting torch; the filter plate is connected to the ventilation slot; A purifier is connected to the protective baffle on the side away from the cutting torch; the purifier is connected to a ventilation slot; and a nozzle is installed on the output end of the purifier.

5. A plasma cutting machine for steel structure processing according to claim 4, characterized in that: Includes a rotating shaft, mounted on the filter plate; the rotating shaft is located within the ventilation slot; The heat dissipation blades are mounted on the rotating shaft.

6. The plasma cutting machine for steel structure processing according to claim 3, characterized in that: Includes locking slots, located on the side of the rotating arc column near the locking slide; several locking slots are arranged at equal intervals with the center of the rotating arc column as a reference; A locking insert is installed on the side of the locking slide near the locking slot; the locking insert passes through the rotating base and connects to one of the locking slots. Pull ring, installed on the locking slide.

7. The plasma cutting machine for steel structure processing according to claim 1, characterized in that: Including the first bevel tooth, installed on the T-shaped base; The first pulley is mounted on the T-shaped base; the first pulley is rotatably connected to the first bevel gear. The second pulley is connected to the T-shaped base; The transmission belt is connected at both ends to the first pulley and the second pulley, respectively; A rotating gear is mounted on a protective baffle; a second bevel gear is mounted on the rotating gear; the second bevel gear meshes with the first bevel gear. A rotating gear ring is mounted on a rotating base; the rotating gear ring is coaxial with the center of the rotating arc column; the rotating gear ring is meshed with a rotating gear.

8. A plasma cutting machine for steel structure processing according to claim 7, characterized in that: Includes a guide turntable, mounted on the second pulley; The guide column is installed on the edge of the guide turntable away from the second pulley; A guide base is installed on a T-shaped base; a guide slide column is connected through the guide base, and the two slide in cooperation. A guide block is mounted on a guide slide column; the guide block is located on the side of the guide turntable away from the second pulley; a guide groove is provided through the guide block on the side closer to the guide turntable; the guide column is located in the guide groove, and the two slide in cooperation; A bent rod is installed on the guide block; an elastic telescopic column is connected to the bent rod; the elastic telescopic column is located on the side of the protective baffle closer to the cutting torch; a sloping scraper is connected to the end of the elastic telescopic column closer to the protective baffle; the sloping scraper is in contact with the inner wall of the protective baffle.

9. A plasma cutting machine for steel structure processing according to claim 1, characterized in that: A cooling actuator is provided on the protective baffle; the cooling actuator includes a braking base plate, which is mounted on the protective baffle. A brake shaft is connected to a brake base plate; a turbine is installed at the end of the brake shaft; the turbine is located at the nozzle output end; airflow is injected through the nozzle and acts on the turbine; Brake cam, mounted on brake shaft; A limiting base is connected to the brake base plate; a limiting slide pin is connected through the limiting base near the brake cam; the limiting slide pin is slidably engaged with the limiting base; a brake block is connected to the end of the limiting slide pin near the brake cam; a brake slide plate is connected to the end of the limiting slide pin away from the brake cam; the side of the brake block away from the limiting slide pin is located on the rotation path of the brake cam sidewall. A limiting spring is sleeved on a limiting slide post; one end of the limiting spring is fixedly connected to the brake block, and the other end is fixedly connected to the limiting base.

10. A plasma cutting machine for steel structure processing according to claim 9, characterized in that: It includes a brake box, which is installed on a protective baffle; the brake slide plate is fitted into the brake box, and the two slide together. Cooling gas tank, installed on the protective baffle; The main valve is connected to the brake box; Auxiliary valves are connected to both sides of the brake box; one auxiliary valve is equipped with an air exchange pipe, and the other auxiliary valve is equipped with a connecting pipe; the connecting pipe is connected to the cooling air tank. The air outlet pipe is connected to the main valve at one end and faces the output end of the cutting torch at the other end.

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