Plasma cutting equipment for steel structure

Abstract

The invention is suitable for the technical field of plasma cutting equipment, and provides plasma cutting equipment for a steel structure. After the inclination angle of the two-degree-of-freedom driving assembly is adjusted to be perpendicular to the inclination angle of the circular pipe through the swinging device, the working end of the two-degree-of-freedom driving assembly is adjusted to move to the center of the end of the circular pipe, so that the axis of the rotating working face is located on the axis of the circular pipe, and the rotating working face is perpendicular to the axis of the circular pipe; the position of the working end can be adjusted through the two-degree-of-freedom driving assembly, so that the distance of the plasma cutting head extending into the circular pipe is adjusted, the length of the end of the cut circular pipe is adjusted, the plasma cutting head is started, and the rotating working face is driven to rotate through the second rotating driving device so as to cut the circular pipe. The circular pipe cutting device is convenient and fast during construction on a construction site, high in cutting quality and efficiency and capable of adapting to circular pipes with different diameters.

Description

A plasma cutting device for steel structures Technical Field

[0001] This application relates to the field of plasma cutting equipment technology, and more particularly to a plasma cutting equipment for steel structures. Background Technology

[0002] Plasma cutting equipment is an industrial device that uses the heat of a high-temperature plasma arc to melt metal materials and then uses a high-speed plasma stream to blow away the molten metal, thereby achieving rapid cutting of metal structures.

[0003] When adjusting the size or cutting the end face of round pipes at the construction site, the round pipes often have a certain degree of inclination. Existing technologies often rely on manual cutting and operational experience, which leads to problems such as difficulty in controlling flatness, low efficiency, and high labor costs. Furthermore, existing plasma cutting is difficult to adapt to pipes of different diameters and lacks versatility. As a result, the processing of large-diameter pipes faces multiple technical bottlenecks in the end treatment stage, including low automation, poor stability, and high maintenance costs, thus making processing difficult.

[0004] Therefore, there is an urgent need for a plasma cutting device that can solve the above problems. Summary of the Invention

[0005] This application provides a plasma cutting device for steel structures, which can solve the problems of difficulty in ensuring cutting quality and efficiency and high processing difficulty when cutting round pipes on the construction site.

[0006] This application provides a plasma cutting device for steel structures, comprising: a base; a swinging device disposed on the top surface of the base, the swinging device having an inclined working surface capable of tilting relative to the top surface of the base; a two-degree-of-freedom drive assembly disposed on the inclined working surface, having a working end capable of moving in a plane perpendicular to the inclined working surface; a rotating assembly disposed on the working end of the two-degree-of-freedom drive assembly, having a rotating working surface capable of rotating relative to the working end of the two-degree-of-freedom drive assembly, the rotating working surface being perpendicular to both the inclined working surface and the plane in which the working end of the two-degree-of-freedom drive assembly moves; the rotating assembly further comprising a second rotating drive device disposed on the working end of the two-degree-of-freedom drive assembly, the driving end of the second rotating drive device capable of driving the rotating drive surface to rotate; and a plasma cutting head for cutting round tubes, the plasma cutting head being connected to the rotating working surface via a connecting rod, the length direction of the plasma cutting head being parallel to the rotating working surface.

[0007] Optionally, it also includes an eccentric adjustment assembly, which includes a rotary platform, a guide rail, a first slider, and two guide wheels. The rotary platform is rotatably mounted on a rotary working surface, with the side of the rotary platform away from the rotary working surface configured as the working surface of the rotary platform. The working surface of the rotary platform is parallel to the rotary working surface. A first limiting plate is provided on the rotary platform, and a second limiting plate is provided on the rotary working surface corresponding to the first limiting plate. The first limiting plate and the second limiting plate are connected by a first elastic element, which is in a natural state. The guide rail is mounted on the working surface of the rotary platform, and a connecting limiting block is provided at one end of the guide rail. One end is provided with a blocking limit block; the first slider is slidably mounted on the guide rail, and the first slider and the connecting limit block are connected by a second elastic element. The second elastic element is in a compressed state. The blocking limit block is used to work together with the connecting limit block to prevent the first slider from detaching from the guide rail; one end of the connecting rod is connected to the first slider, the axis of the connecting rod is perpendicular to the rotating working surface, and the end of the connecting rod away from the first slider is connected to the plasma cutting head; two guide wheels are respectively connected to the connecting rod through two guide rods of the same length, and the axes of the two guide rods are located in the same plane in a plane perpendicular to the length direction of the connecting rod, and the two guide wheels are set at an included angle.

[0008] Optionally, the eccentric adjustment assembly also includes a second slider, which is sleeved on the connecting rod and can be locked or released relative to the connecting rod. Both guide wheels are connected to the second slider via the guide rod.

[0009] Optionally, the eccentricity adjustment assembly also includes a sliding rheostat and a controller. The sliding rheostat includes a resistance block disposed on the rotating working surface, a slider connected to the rotating platform, and a slider connected to the slider. The sliding rheostat is electrically connected to the controller, and the controller is electrically connected to the second rotary drive device. When the rotating platform and the rotating working surface do not deflect relative to each other, the slider is located in the middle of the resistance block. When the rotating working surface and the rotating platform deflect in the same direction, the slider will drive the slider to slide on the resistance block, thereby increasing the resistance of the sliding rheostat. When the rotating working surface and the rotating platform deflect in opposite directions, the slider will drive the slider to slide on the resistance block, thereby decreasing the resistance of the sliding rheostat. When the resistance of the sliding rheostat increases to a predetermined threshold, the controller controls the second rotary drive device to decelerate.

[0010] Optionally, the base has a groove extending along its width, with the length of the groove extending along the width of the base; two insert plates, one end of each insert plate located within the groove, and the other end extending away from the base; a drive assembly disposed within the base, with its drive ends respectively connected to the ends of the two insert plates located within the groove. The drive assembly is used to drive the two insert plates to move towards or away from each other along the width of the base, including a first rotary drive device and two lead screws rotatably disposed within the groove and arranged along the extension direction of the groove. The two lead screws are coaxially arranged, and the drive end of the first rotary drive device is connected to the first umbrella... The system is connected by gears, with one end of each of the two lead screws meshing with a first bevel gear via a second bevel gear. Each lead screw is equipped with a third slider, which is connected to an insert plate. The third sliders have threaded through holes that mate with the lead screws. Under the rotation of the lead screws and the limiting action of the grooves, the two third sliders move towards or away from each other, thereby driving the two insert plates to move towards or away from each other along the width of the base. Two lifting components are respectively installed on the two insert plates for pushing and lifting the circular tube. When the inclined working surface is tilted relative to the top surface of the base, the inclined working surface extends towards the end of the insert plate furthest from the base.

[0011] Optionally, the lifting assembly includes a insert sleeve, a jack, and multiple arc blocks. The insert sleeve is fitted onto the insert plate and can slide along the length of the insert plate. The insert sleeve can be released or locked relative to the insert plate. The jack is mounted on the insert sleeve and is used to lift the circular tube. One of the multiple arc blocks is mounted on the lifting end of the jack. The multiple arc blocks are hinged to each other to form a support surface composed of multiple arc surfaces.

[0012] Optionally, the two-degree-of-freedom drive assembly includes a first linear drive device and a second linear drive device. The first linear drive device is disposed on the inclined working surface, and its drive end is capable of reciprocating linear motion on a working surface parallel to the inclined working surface. The second linear drive device is disposed on the drive end of the first linear drive device and is capable of reciprocating linear motion on a plane parallel to the inclined working surface under the action of the first linear drive device. The drive end of the second linear drive device is also capable of reciprocating linear motion on a plane perpendicular to the inclined working surface. The first and second linear drive devices enable the second linear drive device to move on a plane perpendicular to the inclined working surface. A mounting plate is disposed on the drive end of the second linear drive device. The plane on which the mounting plate is located is perpendicular to the inclined working surface and the motion plane of the drive end of the second linear drive device, respectively. The mounting plate is configured as the working end of the two-degree-of-freedom drive assembly, and the rotating working surface is located on one side of the mounting plate.

[0013] Optionally, the rotating assembly also includes a rotating plate, which is disposed on the working end of the two-degree-of-freedom drive assembly and is rotatably connected to the working end of the two-degree-of-freedom drive assembly. A second rotation drive device is disposed on the working end of the two-degree-of-freedom drive assembly, and the drive end of the second rotation drive device is connected to the rotating plate. The second rotation drive device is used to drive the rotating plate to rotate.

[0014] Optional features include casters and push rods. There are multiple casters, which are located at the bottom of the base and the bottom of the insert plate. The push rods are used to work with the casters to drive the overall movement of the plasma cutting equipment. The push rods are connected to the base.

[0015] Optionally, it also includes two support components, which are respectively disposed on two insert plates. The support components are located between the base and the lifting component, and the support components have a support end for supporting the round tube.

[0016] The above-mentioned solution of this application has the following beneficial effects: After adjusting the tilt angle of the two-degree-of-freedom drive assembly to be perpendicular to the tilt angle of the round tube after it is lifted by the swing device, the working end of the two-degree-of-freedom drive assembly is moved to the center of the end of the round tube so that the axis of the rotating working surface of the rotating assembly is located on the axis of the round tube. At the same time, the rotating working surface is perpendicular to the axis of the round tube. Meanwhile, the two-degree-of-freedom drive assembly can drive the rotating working surface to move along the axis of the round tube to adjust the distance of the plasma cutting head into the round tube, thereby adjusting the length of the cut end of the round tube. Then, the plasma cutting head is started and the second rotating drive device is started to drive the rotating working surface to rotate to perform circumferential cutting on the end of the round tube. Therefore, the plasma cutting equipment for steel structures provided by this application is convenient and efficient in construction site, and can adapt to round tubes of different diameters.

[0017] Other beneficial effects of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the overall structure of a plasma cutting device for steel structures provided in an embodiment of this application; Figure 2 is an enlarged schematic diagram of part A in Figure 1; Figure 3 is a partial schematic diagram of the structure of a plasma cutting device for steel structures provided in an embodiment of this application; Figure 4 is an enlarged schematic diagram of part B in Figure 1; Figure 5 is a partial cross-sectional schematic diagram of the drive assembly, base and insert plate provided in an embodiment of this application.

[0020] [Explanation of reference numerals in the attached drawings] 1. Base; 11. Groove; 12. Caster wheel; 13. Push rod; 2. Insert plate; 3. Drive assembly; 31. First rotary drive device; 32. Lead screw; 33. Third slider; 34. Gearbox; 35. First bevel gear; 36. Second bevel gear; 4. Lifting assembly; 41. Insert plate sleeve; 42. Jack; 43. Third linear drive device; 44. Arc block; 441. Arc surface; 45. Support surface; 6. Swing device; 61. Inclined working surface; 7. Two-degree-of-freedom drive assembly; 71. First linear drive device; 72. Second linear drive device; 73. Mounting plate; 8. 81. Rotating assembly; 81. Rotating plate; 811. Rotating working surface; 8111. Second limiting plate; 82. Second rotating drive device; 83. Connecting rod; 9. Eccentric adjustment assembly; 91. Rotating platform; 911. First limiting plate; 92. Guide rail; 921. Connecting limiting block; 922. Barrier limiting block; 93. First slider; 94. Guide wheel; 95. First elastic element; 96. Second elastic element; 97. Guide rod; 98. Second slider; 99. Sliding rheostat; 991. Slider; 992. Sliding plate; 993. Resistance block; 10. Plasma cutting head; 12. Support assembly; 121. Support end. Detailed Implementation

[0021] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0022] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0023] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0024] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0025] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0027] Currently, it is difficult to guarantee cutting quality and efficiency when cutting round pipes on construction sites, and the processing is also very difficult.

[0028] To address the aforementioned problems, this application provides a plasma cutting device for steel structures, as shown in Figures 1 and 2. The plasma cutting device includes a base 1, a swing device 6, a two-degree-of-freedom drive assembly 7, a rotation assembly 8, and a plasma cutting head 10. The swing device 6 is disposed on the top surface of the base 1 and has an inclined working surface 61 that can tilt relative to the top surface of the base 1. The two-degree-of-freedom drive assembly 7 is disposed on the inclined working surface 61 and has a working end capable of moving in a plane perpendicular to the inclined working surface 61. The rotation assembly 8 is disposed on the working end of the two-degree-of-freedom drive assembly 7 and has a working end capable of moving relative to the inclined working surface 61. A rotating working surface 811 rotates at the working end of the two-degree-of-freedom drive assembly 7. The rotating working surface 811 is perpendicular to the inclined working surface 61 and the plane in which the working end of the two-degree-of-freedom drive assembly 7 moves. The rotating assembly 8 also includes a second rotating drive device 82, which is disposed on the working end of the two-degree-of-freedom drive assembly 7. The driving end of the second rotating drive device 82 can drive the rotating working surface 811 to rotate. The plasma cutting head 10 is used to cut round tubes. The plasma cutting head 10 is connected to the rotating working surface 811 through a connecting rod 83. The length direction of the plasma cutting head 10 is parallel to the rotating working surface 811.

[0029] This application adjusts the tilt angle of the two-degree-of-freedom drive assembly 7 to be perpendicular to the tilt angle of the round tube after it is lifted by the swing device 6. Then, by adjusting the working end of the two-degree-of-freedom drive assembly 7 to move to the center of the end of the round tube, the axis of the rotating working surface 811 of the rotating assembly 8 is located on the axis of the round tube. At the same time, the rotating working surface 811 is perpendicular to the axis of the round tube. Simultaneously, the two-degree-of-freedom drive assembly 7 can drive the rotating working surface 811 to move along the axis of the round tube to adjust the distance of the plasma cutting head 10 into the round tube, thereby adjusting the length of the cut end of the round tube. Then, the plasma cutting head 10 is started and the rotating working surface 811 is driven to rotate by the second rotating drive device 82 to perform circumferential cutting on the end of the round tube. Therefore, the plasma cutting equipment for steel structures provided by this application is convenient and efficient for construction on the construction site, and the cutting quality is high.

[0030] It should be noted that the working end of the two-degree-of-freedom drive assembly 7 is configured on the centerline between the two insert plates 2. The two insert plates 2 move the same distance when they move towards or away from each other along the length direction of the groove 11. In this way, the working end of the two-degree-of-freedom drive assembly 7 will always be on the centerline between the two insert plates 2. The plane of movement of the working end of the two-degree-of-freedom drive assembly 7 is coplanar with the plane of vertical direction of the centerline between the two insert plates 2. Furthermore, the connecting rod 83 is configured to be coplanar with the plane of movement of the working end of the two-degree-of-freedom drive assembly 7. In this embodiment, when the moving ends of the two lifting assemblies 4 simultaneously lift the round tube by the same distance on both sides of the outer wall of the round tube, the plane of vertical direction of the axis of the round tube is coplanar with the plane of movement of the working end of the two-degree-of-freedom drive assembly 7 and the plane where the support rod is located. This allows the plasma cutting head 10 to be better aligned with the round tube during rotary cutting.

[0031] It should be noted that in some embodiments of this application, the connection position between the connecting rod 83 and the plasma cutting head 10 can be changed to accommodate different round tube diameters; in other specific embodiments, the plasma cutting head 10 is connected to the connecting rod 83 by an adjusting rod, and the length of the adjusting rod can be changed to accommodate different round tube diameters.

[0032] It is understood that the above-mentioned swing device 6 can be set with reference to the existing technology, and will not be elaborated in detail here. For example, the above-mentioned swing device 6 is a screw-type tilting mechanism.

[0033] In some embodiments of this application, as shown in Figures 1 to 3, an eccentric adjustment component 9 is further included. The eccentric adjustment component 9 includes a rotating platform 91, a guide rail 92, a first slider 93, and two guide wheels 94. The rotating platform 91 is rotatably mounted on a rotating working surface 811. The side of the rotating platform 91 away from the rotating working surface 811 is configured as the working surface of the rotating platform 91. The working surface of the rotating platform 91 is parallel to the rotating working surface 811. A first limiting plate 911 is provided on the rotating platform 91, and a second limiting plate 8111 is provided on the rotating working surface 811 corresponding to the first limiting plate 911. The first limiting plate 911 and the second limiting plate 8111 are connected by a first elastic member 95, which is in a natural state. The guide rail 92 is disposed on the working surface of the rotating platform 91, and one end of the guide rail 92 is provided with a connecting... A limiting block 921 is connected to the guide rail 92, and a blocking limiting block 922 is provided at the other end of the guide rail 92. The first slider 93 is slidably disposed on the guide rail 92. The first slider 93 is connected to the connecting limiting block 921 through a second elastic element 96. The second elastic element 96 is in a compressed state. The blocking limiting block 922 is used to work together with the connecting limiting block 921 to prevent the first slider 93 from detaching from the guide rail 92. One end of the connecting rod 83 is connected to the first slider 93. The axis of the connecting rod 83 is perpendicular to the rotating working surface 811. The end of the connecting rod 83 away from the first slider 93 is connected to the plasma cutting head 10. Two guide wheels 94 are respectively connected to the connecting rod 83 through two guide rods 97 of the same length. The axes of the two guide rods 97 are located in the same plane in a plane perpendicular to the length direction of the connecting rod 83. The two guide wheels 94 are set at an included angle.

[0034] In the above embodiment, the eccentric adjustment component 9 is used to adjust the motion trajectory of the plasma cutting head 10, so that when there is a certain deviation between the rotation center of the rotating platform 91 and the axis of the circular tube, the plasma cutting head 10 can be adaptively adjusted to always maintain a fixed distance from the inner wall of the circular tube. By driving the rotating working surface 811 to rotate, under the action of the first limiting part, the second limiting plate 8111, and the first elastic member 95, the rotating platform 91 will rotate together with the rotating working surface 811, while maintaining a certain relative rotational motion between the rotating platform 91 and the rotating working surface 811. Under the action of the connecting limiting block 921 of the guide rail 92 and the second elastic member 96, the first slider 93 is always pushed by the second elastic member 96 until one of the two guide wheels 94 contacts the inner wall of the circular tube. The elastic coefficient of the second elastic member 96 is configured to be greater than the elastic coefficient of the first elastic member 95, so that when one of the two guide wheels 94 contacts the inner wall of the circular tube, the second elastic member 96 still pushes. When the first slider 93 moves, the rotating platform 91 will automatically deflect due to uneven force, causing the other guide wheel 94 to also contact the inner wall of the round tube. At this point, both guide wheels 94 are in contact with the inner wall of the round tube. Simultaneously, the rotating working surface 811 rotates, driving the eccentric adjustment component 9 to rotate as a whole, thereby driving the slider, connecting rod 83, and plasma cutting head 10 to rotate to perform circumferential cutting on the round tube. During this process, the two guide wheels 94 can always maintain contact with the inner wall of the round tube, so that the plasma cutting head 10 can always maintain the same distance from the inner wall of the round tube. Specifically, the included angle between the two guide wheels 94 is configured as an acute angle. Since both guide wheels 94 are connected to the connecting rod 83 through guide rods 97 of the same length, the distance between the plasma cutting head 10 and the inner wall of the round tube can be adjusted by the connection position of the plasma cutting head 10 and the connecting rod 83. Moreover, this distance will remain unchanged when the plasma cutting equipment performs internal circumferential cutting on the round tube, thereby ensuring the cutting quality.

[0035] It should be noted that, in order to ensure the stability of the rotating platform 91 when it rotates relative to the rotating working surface 811 in a straight line, in some embodiments of this application, as shown in Figures 2 and 3, two first limiting plates 911 are provided, and the two first limiting plates 911 are coplanar in the length direction. There are four second limiting plates 8111 in total, and two second limiting plates 8111 are provided on both sides of each first limiting plate 911. Each second limiting plate 8111 is connected to the first limiting plate 911 through a first elastic member 95.

[0036] In some embodiments of this application, as shown in Figures 2 and 3, the eccentric adjustment assembly 9 further includes a second slider 98, which is sleeved on the connecting rod 83 and can be locked or released relative to the connecting rod 83. Both guide wheels 94 are connected to the second slider 98 through guide rods 97.

[0037] The aforementioned second slider 98 is used to adjust the position of the guide rod 97 and the guide wheel 94 on the connecting rod 83, so that when the connecting rod 83 extends into the inner wall of the circular tube, the guide rod 97 and the guide wheel 94 can be kept inside the circular tube by sliding the second slider 98. It is understood that locking or releasing the second slider 98 relative to the connecting rod 83 can be achieved by conventional means in the prior art. For example, the second slider 98 can be locked or released relative to the connecting rod 83 by fasteners. Specifically, a screw hole is opened on the second slider 98, and a bolt is inserted into it. The hole allows the end of the bolt shank away from the head to abut against the connecting rod 83, thereby locking the second slider 98 relative to the connecting rod 83. By adjusting the bolt tightness, the bolt gradually moves away from the connecting rod 83, at which point the second slider 98 is released relative to the connecting rod 83, and the position of the second slider 98 on the connecting rod 83 can be adjusted. Alternatively, a snap-fit ​​structure for locking or releasing the slider and rod in the prior art can be used, with the snap-fit ​​structure set on the second slider 98, thereby locking or releasing the second slider 98 relative to the connecting rod 83.

[0038] In some embodiments of this application, as shown in Figures 2 and 3, the eccentric adjustment assembly 9 further includes a sliding rheostat 99 and a controller (not shown in the figures). The sliding rheostat 99 includes a resistor block 993 disposed on the rotating working surface 811, a slider 991 connected to the rotating platform 91, and a slider 992 connected to the slider 991. The sliding rheostat is electrically connected to the controller, and the controller is electrically connected to the second rotation drive device 82. When the rotating platform 91 and the rotating working surface 811 do not undergo relative deflection, the slider 992 is located at... In the middle of resistor block 993, when the rotating working surface 811 and the rotating platform 91 deflect in the same direction, slider 991 will drive slider 992 to slide on resistor block 993, thereby increasing the resistance of sliding rheostat 99. When the rotating working surface 811 and the rotating platform 91 deflect in opposite directions, slider 991 will drive slider 992 to slide on resistor block 993, thereby decreasing the resistance of sliding rheostat 99. When the resistance of sliding rheostat 99 increases to a predetermined threshold, the controller controls the second rotating drive device 82 to decelerate.

[0039] When the eccentric adjustment component 9 is in operation, the rotating platform 91 will deflect relative to the rotating working surface 811. Since the plasma cutting head 10 typically only performs one circumferential cut on the round tube during operation, when the rotating working surface 811 and the rotating platform 91 deflect in the same direction, the plasma cutting head 10 will accelerate in the cutting direction. During this cutting operation, the plasma cutting head 10 moves too fast. Simultaneously, the slider 991 will cause the slider 992 to slide on the resistor block 993, thereby... When the resistance of the sliding rheostat 99 increases, and the resistance of the sliding rheostat 99 exceeds a predetermined threshold, the plasma cutting head 10 will overspeed in the cutting direction. When the controller determines that the resistance of the sliding rheostat 99 is greater than the preset threshold, it will control the second rotary drive device 82 to decelerate. This can avoid the phenomenon of "not burning through" in the cutting operation. When the resistance of the sliding rheostat 99 does not exceed the predetermined threshold, there is currently no risk of the plasma cutting head 10 overspeeding in the cutting direction, and the second rotary drive device 82 will rotate at a constant speed as usual.

[0040] It is understood that the cutting direction mentioned above is the rotation direction of the rotating working surface 811, that is, the movement direction of the plasma cutting head 10 when it rotates, and it is also the rotation direction of the driving end of the second rotating drive device 82.

[0041] It should be noted that the functions of the controller itself, such as reading the resistance value of the sliding rheostat 99, determining the relationship between the resistance value of the sliding rheostat 99 and the predetermined threshold, and controlling the deceleration of the second rotary drive device 82, are all functions of the controller itself.

[0042] In some embodiments of this application, as shown in FIG5, the plasma cutting equipment further includes two insert plates 2, a driving assembly 3, and two lifting assemblies 4. The base 1 has a groove 11 arranged along its width direction, and the length direction of the groove 11 extends along the width direction of the base 1. One end of the two insert plates 2 is located in the groove 11, and the other end extends away from the base 1. The driving assembly 3 is disposed in the base 1, and the driving end of the driving assembly 3 is respectively connected to one end of the two insert plates 2 located in the groove 11. The driving assembly 3 is used to drive the two insert plates 2 to move towards or away from each other along the width direction of the base 1. The two lifting assemblies 4 are respectively disposed on the two insert plates 2 and are used to push and lift the round tube. The driving assembly 3 includes a first rotary driving device 31 and a rotatable device disposed in the groove 11 and extending along the groove 11. Two lead screws 32 are arranged in the extension direction of the base 1, and the two lead screws 32 are coaxially arranged. The driving end of the first rotary drive device 31 is connected to the first bevel gear 35, and one end of each of the two lead screws 32 meshes with the first bevel gear 35 through a second bevel gear 36. Each of the two lead screws 32 is provided with a third slider 33, and the two third sliders 33 are respectively connected to an insert plate 2. The third sliders 33 are provided with threaded through holes that cooperate with the lead screws 32. Under the rotation of the lead screws 32 and the limiting action of the groove 11, the two third sliders 33 move towards each other or away from each other, so as to drive the two insert plates 2 to move towards each other or away from each other along the width direction of the base 1. When the inclined working surface 61 of the swing device 6 is inclined relative to the top surface of the base 1, the inclined working surface 61 faces the extension direction of the end of the insert plate 2 away from the base 1.

[0043] The drive assembly 3 is used to adjust the movement of the two insert plates 2 towards or away from each other along the width direction of the base 1, thereby adjusting the distance between the two insert plates 2. This allows the two insert plates 2 to move along the length direction of the circular tube and extend into both sides of the circular tube. After the insert plates 2 move to a suitable position relative to the circular tube, the lifting assembly 4 lifts the circular tube to leave cutting space. Then, the tilt angle of the two-degree-of-freedom drive assembly 7 is adjusted by the swing device 6 to be perpendicular to the tilt angle of the circular tube after it is lifted. Finally, the movement of the working end of the two-degree-of-freedom drive assembly 7 is adjusted. The rotation is directed to the center of the end of the circular tube so that the axis of the rotating working surface 811 of the rotating assembly 8 is located on the axis of the circular tube. At the same time, the rotating working surface 811 is perpendicular to the axis of the circular tube. Simultaneously, the rotating working surface 811 can be driven to move along the axis of the circular tube by the two-degree-of-freedom drive assembly 7 to adjust the distance that the plasma cutting head 10 extends into the circular tube, thereby adjusting the length of the cut end of the circular tube. Then, the plasma cutting head 10 is started and the rotating working surface 811 is driven to rotate by the second rotating drive device 82 to perform circumferential cutting on the end of the circular tube.

[0044] Specifically, the aforementioned driving device is used to drive the two insert plates 2 to move back to back or towards each other. The two lead screws 32 are coaxially arranged, and the axial direction of the two lead screws 32 is the same as the length direction of the groove 11 (i.e., the width direction of the base 1). The ends of the two lead screws 32 closest to the other lead screw 32 are connected to the first bevel gear 35 through the second bevel gear 36. The ends of the two lead screws 32 away from the second bevel gear 36 are rotatably connected to the inner wall of the groove 11. When the first bevel gear 35 rotates, it drives the two lead screws 32 to rotate synchronously in opposite directions. The two third sliders 33 are respectively arranged on the two lead screws 32. Under the limiting action of the groove 11, the two third sliders 33 will move the same distance towards or away from each other, thereby driving the two insert plates 2 to move towards or away from each other. During this movement, the movement distance of the two insert plates 2 is consistent, thereby ensuring that the axis of the connecting rod 83 of the rotating assembly 8 and the plasma cutting head 10 are always located on the plane in the vertical direction of the circular tube axis.

[0045] In some embodiments of this application, as shown in FIG5, the drive assembly 3 further includes a gearbox 34 disposed in the groove 11. The top and bottom surfaces of the gearbox 34 are respectively connected to the top and bottom surfaces of the groove 11. The first bevel gear 35 and the second bevel gear 36 are both located in the gearbox 34. One end of the two lead screws passes through the gearbox 34 and is connected to the second bevel gear 36.

[0046] The gearbox 34 is used to prevent external interference with the movement of the first bevel gear 35 and the second bevel gear 36, and to prevent the transmission components from being affected by external factors.

[0047] In some embodiments of this application, as shown in Figures 1 and 4, the lifting assembly 4 includes a plate sleeve 41 and a jack 42. The plate sleeve 41 is sleeved on the plate 2 and can slide along the length direction of the plate 2. The plate sleeve 41 can be loosened or locked relative to the plate 2. The jack 42 is disposed on the plate sleeve 41 and is used to lift the round tube.

[0048] The aforementioned jack 42 is used to drive the insert sleeve 41 to lift the round tube. The insert sleeve 41 can be loosened or locked relative to the insert plate 2 using existing technology. The specific settings can be referred to the existing technology, and will not be elaborated on here.

[0049] In some other embodiments of this application, as shown in FIG1, a third linear drive device 43 is provided on the side of the insert plate 2. The drive end of the third linear drive device 43 can move along the length direction of the insert plate 2, and the drive end of the third linear drive device 43 is connected to the insert plate sleeve 41 so that the insert plate sleeve 41 can move along the length direction of the insert plate 2. For example, the third linear drive device 43 can be a device with a drive end capable of reciprocating linear motion, such as a pneumatic push rod 13, an electric push rod 13, or a hydraulic push rod 13, so that the insert plate sleeve 41 moves along the length direction of the insert plate 2, and the relative position of the insert plate sleeve 41 and the insert plate 2 is controllable.

[0050] In some embodiments of this application, as shown in FIG4, the lifting assembly 4 further includes a plurality of arc blocks 44, one of which is disposed on the lifting end of the jack 42, and the plurality of arc blocks 44 are hinged to each other to form a support surface 45 composed of a plurality of arc surfaces 441.

[0051] The aforementioned arc-shaped block 44 is used to fit as close as possible to the outer surface of the circular tube, increasing the contact area when the lifting component 4 contacts the circular tube. When the jack 42 gradually lifts upward, the multiple arc-shaped blocks 44, due to their mutual hinge, will adaptively fit with the outer surface of the circular tube when in contact with the outer wall of the circular tube, thereby increasing the contact area with the circular tube and preventing excessive damage to the outer wall of the circular tube. It is understood that, in order to reduce damage to the outer wall of the circular tube, the side of the arc-shaped block 44 that contacts the circular tube can be configured as a flexible layer. For example, by arranging flexible materials such as rubber on the arc-shaped block 44, damage to the outer wall of the circular tube can be reduced.

[0052] In some embodiments of this application, as shown in FIG1, the two-degree-of-freedom drive assembly 7 includes a first linear drive device 71 and a second linear drive device 72. The first linear drive device 71 is disposed on the inclined working surface 61, and the drive end of the first linear drive device 71 can perform reciprocating linear motion on the working surface parallel to the inclined working surface 61. The second linear drive device 72 is disposed on the drive end of the first linear drive device 71, and can perform reciprocating linear motion on the plane parallel to the inclined working surface 61 under the action of the first linear drive device 71. The drive end of the second linear drive device 72 can perform reciprocating linear motion on the plane perpendicular to the inclined working surface 61. The first linear drive device 71 and the second linear drive device 72 enable the second linear drive device 72 to move on a plane perpendicular to the inclined working surface 61. A mounting plate 73 is disposed on the drive end of the second linear drive device 72. The plane on which the mounting plate 73 is located is perpendicular to the inclined working surface 61 and the motion plane of the drive end of the second linear drive device 72, respectively. The mounting plate 73 is configured as the working end of the two-degree-of-freedom drive assembly 7, and the rotating working surface 811 is located on one side of the mounting plate 73. In some specific embodiments, the rotating working surface 811 is located on the side of the mounting plate 73 near the extension direction of the insert plate 2.

[0053] The aforementioned two-degree-of-freedom drive assembly 7, by setting a first linear drive device 71 and a second linear drive device 72, enables the working end of the two-degree-of-freedom drive assembly 7 to move on a surface perpendicular to the inclined working surface 61, thereby adjusting the position of the rotating working surface 811, and adjusting the position of the connecting rod 83 and the plasma cutting head 10, so that the connecting rod 83 and the plasma cutting head 10 can extend into the inside of the round tube and retract to the outside of the round tube after cutting is completed.

[0054] It is understood that the first linear drive device 71 and the second linear drive device 72 described above can be configured with reference to the prior art. For example, the first linear drive device 71 and the second linear drive device 72 can be pneumatic push rod 13, electric push rod 13, hydraulic push rod 13 or linear module, etc.

[0055] In some embodiments of this application, as shown in Figures 2 and 3, the rotating assembly 8 includes a rotating plate 81 and a second rotating drive device 82. The rotating plate 81 is disposed on the working end of the two-degree-of-freedom drive assembly 7. One side of the rotating plate 81 is rotatably connected to the working end of the two-degree-of-freedom drive assembly 7, and the other side of the rotating plate 81 extends toward the end of the insert plate 2 away from the base 1. The second rotating drive device 82 is disposed on the working end of the two-degree-of-freedom drive assembly 7. The driving end of the second rotating drive device 82 is connected to the rotating plate 81, and the second rotating drive device 82 is used to drive the rotating plate 81 to rotate.

[0056] The second rotary drive device 82 described above is used to drive the rotating plate 81 to rotate. The side of the rotating plate 81 away from the two-degree-of-freedom working end is configured as the rotating working surface 811 so that the rotating plate 81 can rotate, that is, the rotating working surface 811 can rotate, thereby driving the connecting rod 83 and the plasma cutting head 10 to rotate to internally cut the round tube.

[0057] It is understood that the first rotary drive device 31 and the second rotary drive device 82 can both be configured with reference to the prior art. For example, the first rotary drive device 31 and the second rotary drive device 82 can both be servo motors.

[0058] In some embodiments of this application, as shown in FIG1, it also includes casters 12 and push rods 13. There are multiple casters 12, which are respectively disposed at the bottom of the base 1 and the bottom of the insert plate 2. The push rods 13 are used to cooperate with the casters 12 to drive the plasma cutting equipment to move as a whole. The push rods 13 are connected to the base 1.

[0059] The aforementioned universal wheels 12 and push rod 13 enable the plasma cutting equipment provided in this application to be portable. Through the action of the push rod 13 and universal wheels 12, the plasma cutting equipment provided in this application can be operated at the construction site to cut scattered round pipes at the construction site. It is understood that the aforementioned universal wheels 12 and push rod 13 are commonly used means in the prior art. The specific setting method and structure can be set with reference to the prior art. It should be noted that the aforementioned universal wheels 12 can be configured as universal wheels 12 with self-locking function to avoid relative movement affecting the cutting during the cutting operation.

[0060] In some embodiments of this application, as shown in FIG1, two supporting components 12 are also included. The two supporting components 12 are respectively disposed on two insert plates 2. The supporting components 12 are located between the base 1 and the lifting component 4. The supporting components 12 have supporting ends 121 for supporting the round tube.

[0061] The aforementioned support component 12 is installed on the insert plate 2 and located between the base 1 and the lifting component 4. When the cutting is completed, the support component 12 can support the cut end of the round tube to avoid affecting the production equipment or the environment of the construction line.

[0062] It should be noted that when the plasma cutting equipment provided in this application embodiment is in use, the plasma cutting head 10 usually only rotates 360°. After the cutting operation is completed, the second rotation drive device 82 will drive the plasma cutting head 10 to reverse and reset. Therefore, the connecting wires, gas supply pipes and other pipelines of the plasma cutting head 10 can be connected to the external power supply and gas supply. The pipelines and connecting rods 83 are fixed together by cable ties, etc., so as to prevent the pipelines from affecting the operation of the plasma cutting head 10 and the guide wheel 94, and to avoid the problem of pipeline knots. In some embodiments, the external power supply and gas supply are set on the base during on-site construction. In other embodiments, the workers place the external power supply and gas supply directly into the pipe to be cut during on-site construction.

[0063] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0064] The above description is the preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A plasma cutting device for steel structures, characterized in that, include: A base (1); a swing device (6) disposed on the top surface of the base (1), the swing device (6) having an inclined working surface (61) capable of tilting relative to the top surface of the base (1); a two-degree-of-freedom drive assembly (7) disposed on the inclined working surface (61), having a working end capable of moving in a plane perpendicular to the inclined working surface (61); a rotation assembly (8) disposed on the working end of the two-degree-of-freedom drive assembly (7), having a rotating working surface (811) capable of rotating relative to the working end of the two-degree-of-freedom drive assembly (7), the rotating working surface (811) being respectively with the inclined working surface (61) and the plane of motion of the working end of the two-degree-of-freedom drive assembly (7) are perpendicular. The rotating assembly (8) also includes a second rotating drive device (82), which is disposed on the working end of the two-degree-of-freedom drive assembly (7). The driving end of the second rotating drive device (82) can drive the rotating drive surface (811) to rotate. The plasma cutting head (10) is used to cut round tubes. The plasma cutting head (10) is connected to the rotating working surface (811) through a connecting rod (83). The length direction of the plasma cutting head (10) is parallel to the rotating working surface (811).

2. The plasma cutting equipment according to claim 1, characterized in that, It also includes an eccentric adjustment assembly (9), which includes a rotating platform (91), a guide rail (92), a first slider (93), and two guide wheels (94); the rotating platform (91) is rotatably mounted on the rotating working surface (811), and the side of the rotating platform (91) away from the rotating working surface (811) is configured as the working surface of the rotating platform (91), the working surface of the rotating platform (91) is parallel to the rotating working surface (811), and the rotating platform (91) A first limiting plate (911) is provided on the rotating working surface (811), and a second limiting plate (8111) is provided on the rotating working surface (811) corresponding to the first limiting plate (911). The first limiting plate (911) and the second limiting plate (8111) are connected by a first elastic element (95), which is in a natural state. A guide rail (92) is provided on the working surface of the rotating platform (91), and a connecting limiting block (921) is provided at one end of the guide rail (92). The other end of the guide rail (92) is provided with a blocking limit block (922); the first slider (93) is slidably disposed on the guide rail (92), and the first slider (93) is connected to the connecting limit block (921) by a second elastic element (96), the second elastic element (96) is in a compressed state, and the blocking limit block (922) is used to work together with the connecting limit block (921) to prevent the first slider (93) from disengaging from the guide rail (92); one end of the connecting rod (83) is connected to the first slider. The block (93) is connected, the axis of the connecting rod (83) is perpendicular to the rotating working surface (811), and the end of the connecting rod (83) away from the first slider (93) is connected to the plasma cutting head (10); the two guide wheels (94) are respectively connected to the connecting rod (83) through two guide rods (97) of the same length, and the axes of the two guide rods (97) are located in the same plane in a plane perpendicular to the length direction of the connecting rod (83), and the two guide wheels (94) are set at an included angle.

3. The plasma cutting equipment according to claim 2, characterized in that, The eccentric adjustment assembly (9) further includes a second slider (98), which is sleeved on the connecting rod (83) and can be locked or released relative to the connecting rod (83). Both guide wheels (94) are connected to the second slider (98) through the guide rod (97).

4. The plasma cutting equipment according to claim 2, characterized in that, The eccentric adjustment assembly (9) further includes a sliding rheostat (99) and a controller. The sliding rheostat (99) includes a resistor block (993) disposed on the rotating working surface (811), a slider (991) connected to the rotating platform (91), and a slider (992) connected to the slider (991). The sliding rheostat is electrically connected to the controller, and the controller is electrically connected to the second rotation drive device (82). When the rotating platform (91) and the rotating working surface (811) do not deflect relative to each other, the slider (992) is located in the middle of the resistor block (993). When the rotating platform (91) deflects relative to the rotating working surface (811), the slider (992) is located in the middle of the resistor block (993). When the rotating working surface (811) and the rotating platform (91) deflect in the same direction, the slider (991) will drive the slider (992) to slide on the resistor block (993), thereby increasing the resistance of the sliding rheostat (99). When the rotating working surface (811) and the rotating platform (91) deflect in opposite directions, the slider (991) will drive the slider (992) to slide on the resistor block (993), thereby decreasing the resistance of the sliding rheostat (99). When the resistance of the sliding rheostat (99) increases to a predetermined threshold, the controller controls the second rotating drive device (82) to decelerate.

5. The plasma cutting equipment according to claim 1, characterized in that, The base (1) has a groove (11) inside, which is arranged along its width direction. The length direction of the groove (11) extends along the width direction of the base (1). There are two insert plates (2), one end of which is located in the groove (11) and the other end extends away from the base (1). A drive assembly (3) is arranged inside the base (1). The drive end of the drive assembly (3) is connected to the end of the two insert plates (2) located in the groove (11). The drive assembly (3) is used to drive the two insert plates (2) to move towards or away from each other along the width direction of the base (1). It includes a first rotary drive device (31) and two lead screws (32) rotatably arranged in the groove (11) and arranged along the extension direction of the groove (11). The two lead screws (32) are coaxially arranged. The drive end of the first rotary drive device (31) is connected to a first bevel gear (35). The two lead screws (32) are connected, and one end of each lead screw (32) meshes with the first bevel gear (35) through a second bevel gear (36). Each lead screw (32) is provided with a third slider (33). The two third sliders (33) are respectively connected to a plate (2). The third slider (33) is provided with a threaded through hole in cooperation with the lead screw (32). The two third sliders (33) move towards each other or away from each other under the rotation of the lead screw (32) and the limiting action of the groove (11), so as to drive the two plates (2) to move towards each other or away from each other along the width direction of the base (1). Two lifting components (4) are respectively provided on the two plates (2) for pushing and lifting the round tube. When the inclined working surface (61) is inclined relative to the top surface of the base (1), the inclined working surface (61) extends towards the end of the plate (2) away from the base (1).

6. The plasma cutting equipment according to claim 5, characterized in that, The lifting assembly (4) includes a plate sleeve (41), a jack (42), and a plurality of arc blocks (44). The plate sleeve (41) is fitted on the plate (2) and can slide along the length of the plate (2). The plate sleeve (41) can be released or locked relative to the plate (2). The jack (42) is mounted on the plate sleeve (41) and is used to lift the round tube. One of the plurality of arc blocks (44) is mounted on the lifting end of the jack (42). The plurality of arc blocks (44) are hinged to each other to form a support surface (45) composed of a plurality of arc surfaces (441).

7. The plasma cutting equipment according to claim 1, characterized in that, The two-degree-of-freedom drive assembly (7) includes a first linear drive device (71) and a second linear drive device (72). The first linear drive device (71) is disposed on the inclined working surface (61), and its drive end is capable of reciprocating linear motion on a working surface parallel to the inclined working surface (61). The second linear drive device (72) is disposed on the drive end of the first linear drive device (71) and is capable of reciprocating linear motion on a plane parallel to the inclined working surface (61) under the action of the first linear drive device (71). The drive end of the second linear drive device (72) is capable of reciprocating linear motion on a plane perpendicular to the inclined working surface (61). The inclined working surface (61) performs reciprocating linear motion on the plane; the first linear drive device (71) and the second linear drive device (72) enable the second linear drive device (72) to move on a plane perpendicular to the inclined working surface (61); a mounting plate (73) is provided on the drive end of the second linear drive device (72), and the plane on which the mounting plate (73) is located is perpendicular to the motion plane of the inclined working surface (61) and the drive end of the second linear drive device (40), respectively. The mounting plate (73) is configured as the working end of the two-degree-of-freedom drive assembly (7), and the rotating working surface (811) is located on one side of the mounting plate (73).

8. The plasma cutting equipment according to claim 1, characterized in that, The rotating assembly (8) further includes a rotating plate (81), which is disposed on the working end of the two-degree-of-freedom drive assembly (7). The rotating plate (81) is rotatably connected to the working end of the two-degree-of-freedom drive assembly (7). The second rotating drive device (82) is disposed on the working end of the two-degree-of-freedom drive assembly (7). The driving end of the second rotating drive device (82) is connected to the rotating plate (81). The second rotating drive device (82) is used to drive the rotating plate (81) to rotate.

9. The plasma cutting equipment according to claim 5, characterized in that, It also includes casters (12) and push rods (13). There are multiple casters (12), which are respectively located at the bottom of the base (1) and the bottom of the insert plate (2). The push rods (13) are used to cooperate with the casters (12) to drive the plasma cutting equipment to move as a whole. The push rods (13) are connected to the base (1).

10. The plasma cutting equipment according to claim 9, characterized in that, It also includes two support components (12), which are respectively disposed on the two insert plates (2). The support components (12) are located between the base (1) and the lifting component (4). The support components (12) have a support end (121) for supporting the round tube.

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