A highly reliable pipe plasma drilling machine

Abstract

The present invention relates to a highly reliable pipeline plasma hole opening machine, comprising a casing, a control device, a lifting device and a hole opening device, wherein the hole opening device comprises a pan-tilt assembly, a swing arm assembly, a slide rail assembly, a cutting assembly and a material lifting assembly, wherein the pan-tilt assembly comprises a pan-tilt support plate, a first hollow rotating table and a turntable, wherein the swing arm assembly comprises a swing arm and a bracket plate, wherein the swing arm is horizontally fixed on the turntable, wherein the bracket plate is vertically fixed on the swing arm, wherein the slide rail assembly is vertically mounted on the bracket plate, wherein the cutting assembly comprises an adapter, a plasma cutting gun, a laser rangefinder, a camera or an infrared rangefinder, wherein the vertical distances between the plasma cutting gun and the laser rangefinder and the axis of the first hollow rotating table are equal, and wherein the material lifting assembly is fixedly connected to the pan-tilt support plate and is used to extract the cut pipe wall. The machine has the advantages of compact structure, light weight, strong functionality, high reliability and fast hole opening speed, and can effectively improve work efficiency.

Description

Technical Field

[0001] The invention relates to a pipeline hole opening machine, in particular to a pipeline hole opening machine based on plasma cutting and having an error correction function. Background Art

[0002] In the operation and management of gas pipelines, it is often necessary to carry out cutting and rerouting operations, and pipeline drilling is an important process for cutting and rerouting. At present, the pipeline drilling machines used in this field are mainly cylinder knife type drilling machines, which have many problems in practical applications, mainly manifested in the following aspects: 1. The product is relatively bulky and needs to be specially equipped with a hydraulic station, which is inconvenient to install and transport; 2. The drilling efficiency is low, and it often takes several hours to drill a hole, and it requires the cooperation of multiple people, which is labor-intensive; 3. The cylinder knife wears quickly, and the use and maintenance costs are high; 4. The drilling diameter has certain limitations, and the demand for large-diameter drilling often cannot meet the use requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a highly reliable pipe plasma hole opening machine, which has the advantages of compact structure, light weight, strong functionality, high reliability and fast hole opening speed, and can effectively improve work efficiency and reduce costs.

[0004] In order to solve the above problems existing in the prior art, the present invention provides a highly reliable pipeline plasma hole opening machine, comprising a casing and a control device, a lifting device and a hole opening device arranged in the casing, the hole opening device comprising a pan head assembly, a swing arm assembly, a slide rail assembly, a cutting assembly and a material lifting assembly, the pan head assembly comprising a pan head support plate connected to the lifting device, a first hollow rotating table is installed on the pan head support plate, a turntable is coaxially fixed on the turntable of the first hollow rotating table, the swing arm assembly comprises a swing arm and a bracket plate, the swing arm is horizontally fixed on the turntable, the bracket plate is vertically fixed on the swing arm, the slide rail assembly is vertically mounted on the bracket plate, the cutting assembly comprises an adapter seat connected to the slide rail assembly, a plasma cutting gun is fixed in the middle of the adapter seat, a laser rangefinder is provided on one side of the plasma cutting gun, a camera or an infrared rangefinder is provided on the other side of the plasma cutting gun, the vertical distances from the plasma cutting gun and the laser rangefinder to the axis of the first hollow rotating table are equal, and the material lifting assembly is fixedly connected to the pan head support plate and is used to extract the cut pipe wall.

[0005] Furthermore, the present invention provides a highly reliable pipe plasma hole opening machine, wherein the casing includes a connecting box, a lifting support plate, a cylinder and a cover cap which are sequentially connected by flange sealing from bottom to top, the control device is fixed on the upper side of the cylinder and is in the cover cap, the lifting device includes a second hollow rotating table, a screw and a plurality of guide rods, the second hollow rotating table is installed on the lifting support plate, a first nut is coaxially fixed in the turntable of the second hollow rotating table, the screw rod passes through the lifting support plate and the second hollow rotating table and cooperates with the first nut thread, a plurality of guide rods pass through guide sleeves correspondingly arranged on the lifting support plate, and the lower ends of the screw rod and the plurality of guide rods are respectively fixedly connected to the pan-tilt support plate.

[0006] Furthermore, the present invention provides a highly reliable pipe plasma hole opening machine, wherein the material lifting assembly includes a support tube, an electromagnet and a switch support plate, the upper end of the support tube passes through the swing arm, the turntable and the first hollow rotating table from bottom to top in sequence and is fixedly connected to the pan-tilt support plate, the electromagnet and the switch support plate are installed at the lower end of the support tube through an elastic buffer, and a plurality of proximity switches distributed around the electromagnet are installed on the switch support plate.

[0007] Furthermore, the present invention provides a highly reliable pipeline plasma hole opening machine, wherein the elastic buffer comprises a pipe nut, a sleeve, a connecting rod, a spring and a hexagonal column, the pipe nut is screwed on the lower end of the support pipe through a thread, the sleeve passes through the bottom wall of the pipe nut, the outer wall of the sleeve is provided with a first limit platform at the upper side position of the bottom wall of the pipe nut, the upper half of the inner wall of the sleeve is provided with a second limit platform, the connecting rod passes through the sleeve, the lower half of the connecting rod is provided with a third limit platform in the sleeve, and the lower end of the connecting rod is provided with The fourth limit platform, the upper end of the connecting rod is provided with a fifth limit platform on the upper side of the sleeve, the spring is sleeved on the connecting rod, the upper and lower ends of the spring are correspondingly pressed on the second limit platform and the third limit platform, the upper end of the hexagonal column is screwed on the lower end of the connecting rod through a threaded hole; the upper end of the sleeve is also provided with a symmetrical limit groove, and the connecting rod is provided with a limit block in the limit groove; the top of the electromagnet is screwed on the threaded column integrated with the hexagonal column through a threaded hole, and the switch support plate is fixedly connected to the lower end of the sleeve.

[0008] Furthermore, the present invention provides a highly reliable pipe plasma hole opening machine, wherein the slide rail assembly includes a base, a guide rail, a slider, a motor, a lead screw and a slide table, the base is fixed on a bracket plate, the upper and lower ends of the base are respectively provided with an upper end plate and a lower end plate, the guide rail is fixed on the base, the slider is clamped on the guide rail and the two are slidably matched, the motor is fixed on the upper end plate, the lower end of the lead screw is mounted on the lower end plate through a bearing, the upper end of the lead screw is connected to the shaft output shaft of the motor through a coupling, the slide table is respectively fixedly connected to the slider and the adapter seat, and a second nut matching the lead screw is provided in the slide table.

[0009] Furthermore, the present invention provides a highly reliable pipe plasma hole opening machine, wherein an axial photoelectric switch is installed on one side of the base through a first fixing bar, an upper limit switch and a lower limit switch are installed on the other side of the base through a second fixing bar, an axial baffle cooperates with the axial photoelectric switch is provided on one side of the slide, and a baffle cooperates with the upper limit switch and the lower limit switch is provided on the other side of the slide.

[0010] Furthermore, the present invention provides a highly reliable pipe plasma drilling machine, wherein the control device includes a fixing frame and a power supply, a DC converter and a plurality of circuit boards mounted on the fixing frame, and the circuit boards are provided with a control circuit and a controller.

[0011] Furthermore, the present invention provides a highly reliable pipe plasma hole opening machine, wherein four proximity switches are evenly arranged along the circumference of the switch support plate, and a redundant limit switch cooperating with the electromagnet is also installed on the switch support plate.

[0012] Furthermore, the present invention provides a highly reliable pipe plasma hole opening machine, wherein the upper end of the support tube passes through the pan-tilt support plate, and the support tube is provided with a plurality of threading holes distributed up and down; the laser rangefinder is fixed to one side of the adapter seat through an adapter plate, and the camera or infrared rangefinder is fixed to the other side of the adapter seat through the adapter plate.

[0013] Furthermore, the present invention provides a highly reliable pipeline plasma drilling machine, wherein a vacuum valve and a relief valve are provided on the connecting box, and a gas pipe joint is sealed and fixed on the cylinder.

[0014] Compared with the prior art, the highly reliable pipeline plasma hole opening machine of the present invention has the following advantages: the present invention provides a casing and a control device, a lifting device and a hole opening device in the casing, so that the hole opening device is provided with a pan head assembly, a swing arm assembly, a slide rail assembly, a cutting assembly and a material lifting assembly, the pan head assembly is provided with a pan head support plate connected to the lifting device, a first hollow rotating table is installed on the pan head support plate, the rotating table is coaxially fixed on the rotating disk of the first hollow rotating table, the swing arm assembly is provided with a swing arm and a bracket plate, and the swing arm water The first hollow rotating table is fixed flat on the rotating table, the bracket plate is fixed vertically on the swing arm, the slide rail assembly is installed vertically on the bracket plate, the cutting assembly is provided with an adapter connected to the slide rail assembly, a plasma cutting gun is fixed in the middle of the adapter, a laser rangefinder is provided on one side of the plasma cutting gun, a camera or an infrared rangefinder is provided on the other side of the plasma cutting gun, and the vertical distances from the plasma cutting gun and the laser rangefinder to the axis of the first hollow rotating table are equal, and the lifting assembly is fixedly connected to the pan-tilt support plate and used to extract the cut pipe wall. Thus, a highly reliable pipeline plasma hole opening machine is formed. In practical applications, the hole opening machine is installed on the welding pipe fitting through a gate valve. When the hole opening operation is performed, the hole opening device is first moved down from the hole opening machine to the welding pipe fitting by controlling the lifting device, and the lifting device is stopped after the hole opening is in place. Then, the plasma cutting gun and the laser rangefinder are moved to the set initial position by controlling the first hollow rotating table and the slide rail assembly. Then, the laser rangefinder is rotated one circle by controlling the first hollow rotating table and scanning the cutting path. Then start the plasma cutting gun, let the first hollow rotating table rotate at a set speed for one circle, and control the distance between the plasma cutting gun and the pipe wall according to the cutting path. After the pipe wall cutting is completed, stop the first hollow rotating table, the slide rail assembly and the plasma cutting gun. Finally, by controlling the lifting device to move the hole-opening device up to the hole-opening machine, the subsequent process can be carried out, and the cut pipe wall will be extracted by the lifting assembly. The present invention uses plasma cutting to open the pipe hole, which greatly improves the hole-opening speed and work efficiency compared with the traditional tube knife hole-opening, and effectively reduces the overall weight and use and maintenance cost of the hole-opening machine. By using a laser rangefinder to detect the distance of the pipe wall and establish a cutting path, and making the vertical distance between the laser rangefinder and the plasma cutting gun to the axis of the first hollow rotating table equal, using the angle between the two, the height difference and the rotation speed of the first hollow rotating table, it is easy to control the slide rail assembly to keep the distance from the plasma cutting gun to the pipe wall within the working distance range, thereby improving the convenience of control and the stability and reliability of cutting and opening. By setting up a camera or an infrared rangefinder, when a fault occurs during the cutting and interrupting process, or the pipe wall is not completely cut off due to an error, the uncut position can be quickly found. After the position is determined, the plasma cutting gun is positioned at that position and cutting is performed again to achieve the purpose of error correction, thereby enhancing the functionality, reliability and practicality of the hole-opening device.When a camera is used, the uncut position can be manually found and the plasma cutting gun can be positioned; when an infrared rangefinder is used, the vertical distance from the plasma cutting gun to the axis of the first hollow rotating table should be equal, so that the infrared rangefinder can detect the distance along the cutting path by rotating the first hollow rotating table. The distance detection value of the cut area is larger, while the distance detection value of the uncut or uncut area will be significantly smaller. This difference can be used to quickly determine the uncut position and area.

[0015] The following is a further detailed description of a highly reliable pipe plasma opening machine of the present invention in conjunction with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of a highly reliable pipeline plasma hole opening machine of the present invention;

[0017] Figure 2 It is an internal schematic diagram of a highly reliable pipeline plasma hole opening machine of the present invention;

[0018] Figure 3 It is a front view of a lifting device in a highly reliable pipeline plasma hole opening machine of the present invention;

[0019] Figure 4 A three-dimensional diagram of a lifting device in a highly reliable pipeline plasma opening machine of the present invention;

[0020] Figure 5 The invention provides a three-dimensional structure of a lifting support plate in a highly reliable pipeline plasma drilling machine. Figure 1 ;

[0021] Figure 6 The invention provides a three-dimensional structure of a lifting support plate in a highly reliable pipeline plasma drilling machine. Figure 2 ;

[0022] Figure 7 It is a front view of a hole-opening device in a highly reliable pipeline plasma hole-opening machine of the present invention;

[0023] Figure 8 It is a left view of a hole-opening device in a highly reliable pipeline plasma hole-opening machine of the present invention;

[0024] Fig. 9 It is a right view of a hole-opening device in a highly reliable pipeline plasma hole-opening machine of the present invention;

[0025] Fig.10 A three-dimensional diagram of a highly reliable pipe plasma hole opening device in the present invention Figure 1 ;

[0026] Fig.11A three-dimensional diagram of a highly reliable pipe plasma hole opening device in the present invention Figure 2 ;

[0027] Fig.12 A three-dimensional diagram of a pan / tilt assembly in a highly reliable pipeline plasma drilling machine according to the present invention Figure 1

[0028] Fig.13 A three-dimensional diagram of a pan / tilt assembly in a highly reliable pipeline plasma drilling machine according to the present invention Figure 2 ;

[0029] Fig.14 It is a front view of a slide rail assembly in a highly reliable pipeline plasma hole opening machine of the present invention;

[0030] Fig.15 A three-dimensional diagram of a slide rail assembly in a highly reliable pipeline plasma drilling machine according to the present invention;

[0031] Fig.16 for Fig.14 AA view in the figure;

[0032] Fig.17 A three-dimensional diagram of a cutting assembly in a highly reliable pipeline plasma hole opening machine according to the present invention Figure 1 ;

[0033] Fig.18 A three-dimensional diagram of a cutting assembly in a highly reliable pipeline plasma hole opening machine according to the present invention Figure 2 ;

[0034] Fig.19 It is a front view of a material lifting assembly in a highly reliable pipeline plasma hole opening machine of the present invention;

[0035] Fig. 20 A three-dimensional diagram of a material lifting assembly in a highly reliable pipeline plasma drilling machine according to the present invention;

[0036] Fig.21 for Fig.19 BB view in the figure;

[0037] Fig. 22 It is a front view of an elastic buffer member in a highly reliable pipeline plasma hole opening machine of the present invention;

[0038] Fig.23 It is a left view of an elastic buffer in a highly reliable pipeline plasma opening machine of the present invention;

[0039] Fig.24 A three-dimensional diagram of an elastic buffer in a highly reliable pipeline plasma hole opening machine according to the present invention;

[0040] Fig.25 for Fig.23 CC view in the figure;

[0041] Fig.26 A three-dimensional control device for a highly reliable pipe plasma drilling machine according to the present invention Figure 1 ;

[0042] Fig. 27 A three-dimensional control device for a highly reliable pipe plasma drilling machine according to the present invention Figure 2 ;

[0043] Fig.28 The installation and use status of a highly reliable pipeline plasma drilling machine of the present invention is shown in FIG. Figure 1 ;

[0044] Fig.29 The installation and use status of a highly reliable pipeline plasma drilling machine of the present invention is shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0045] First of all, it should be explained that the directional words such as up, down, left, right, front and back described in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution and the scope of protection of the present invention.

[0046] like Figures 1 to 29 The specific embodiment of a highly reliable pipe plasma hole opening machine of the present invention is shown, comprising a housing 1 and a control device 2, a lifting device 3 and a hole opening device arranged in the housing 1. The hole opening device comprises a pan head assembly 4, a swing arm assembly 5, a slide rail assembly 6, a cutting assembly 7 and a material lifting assembly 8. The pan head assembly 4 is provided with a pan head support plate 41 connected to the lifting device 3, a first hollow rotating table 42 is installed on the pan head support plate 41, and a turntable 43 is coaxially fixed on the turntable of the first hollow rotating table 42. The swing arm assembly 5 is provided with a swing arm 51 and a bracket plate 52, the swing arm 51 is horizontally fixed on the turntable 43, the bracket plate 52 is vertically fixed on the swing arm 51, and the slide rail assembly 6 is vertically installed on the bracket plate 52. The cutting assembly 7 is provided with an adapter 71 connected to the slide rail assembly 6, a plasma cutting gun 72 is fixed in the middle of the adapter 71, a laser rangefinder 73 is provided on one side of the plasma cutting gun 72, a camera or an infrared rangefinder 74 is provided on the other side of the plasma cutting gun 72, and the vertical distances from the plasma cutting gun 72 and the laser rangefinder 73 to the axis of the first hollow rotating table 42 are equal. The lifting assembly 8 is fixedly connected to the pan / tilt support plate 41 and is used to extract the cut pipe wall.

[0047] The above structure is used to form a highly reliable pipeline plasma hole-opening machine. In practical applications, the hole-opening machine is installed on the welding pipe fitting 200 through the gate valve 100. When the hole-opening operation is performed, the hole-opening device is first moved down from the hole-opening machine to the welding pipe fitting by controlling the lifting device 3, and the lifting device 3 is stopped after the hole-opening device is moved down to the position. Then, the plasma cutting gun 72 and the laser rangefinder 73 are moved to the set initial position by controlling the first hollow rotating table 42 and the slide rail assembly 6. Then, the laser rangefinder 73 is rotated for one circle and the cutting path is scanned by controlling the first hollow rotating table 42. Then, the plasma cutting gun 72 is started, and the first hollow rotating table 42 is rotated for one circle at a set speed, and the distance from the plasma cutting gun 72 to the pipe wall is controlled according to the cutting path. After the pipe wall is cut, the first hollow rotating table 42, the slide rail assembly 6 and the plasma cutting gun 72 are stopped. Finally, the hole-opening device is moved up to the hole-opening machine by controlling the lifting device 3, and the subsequent process can be carried out, and the cut pipe wall will be extracted by the material lifting assembly 8. The present invention uses plasma cutting to perform pipe hole drilling, which greatly improves the hole drilling speed and work efficiency compared with the traditional tube knife hole drilling, and effectively reduces the overall weight and maintenance cost of the hole drilling machine. By using a laser rangefinder 73 to detect the distance from the pipe wall and establish a cutting path, and making the vertical distance from the laser rangefinder 73 to the axis of the first hollow rotating table 42 equal, by using the angle, height difference and rotation speed of the first hollow rotating table 42, it is easy to control the slide rail assembly 6 to keep the distance from the plasma cutting gun 72 to the pipe wall within the working distance range, thereby improving the convenience of control and the stability and reliability of cutting and drilling. By setting a camera or an infrared rangefinder 74, when a fault occurs during the cutting and drilling process, when the cutting is interrupted or the pipe wall is not completely cut off due to an error, the uncut position can be quickly found, and after determining the position, the plasma cutting gun 72 is positioned at the position and cut again to achieve the purpose of error correction, thereby enhancing the functionality, reliability and practicality of the hole drilling device. When a camera is used, the uncut position can be manually found and the plasma cutting gun can be positioned; when an infrared rangefinder is used, the vertical distance from the plasma cutting gun 72 to the axis of the first hollow rotating table 42 should be equal, so that the infrared rangefinder can detect the distance along the cutting path by rotating the first hollow rotating table 42. The distance detection value of the area after cutting is larger, while the distance detection value of the uncut or uncut area will be significantly smaller. Through this difference, the uncut position and area can be quickly determined. It should be noted that the scanning cutting path refers to the laser rangefinder rotating one circle and detecting and recording the pipe wall distance; the connection between the adapter 71 and the slide rail assembly 6 refers to the connection between the adapter 71 and the sliding part of the slide rail assembly 6; during the hole opening operation, the welding pipe fitting 200 is welded on the pipe 300 to be opened, and the gate valve 100 and the welding pipe fitting 200 are commonly used equipment in this field. Their structure and use method are well known to those skilled in the art and will not be repeated here.

[0048] As a specific embodiment, the present invention provides a casing 1 with a connecting box 11, a lifting support plate 12, a cylinder 13 and a cap 14 which are connected sequentially from bottom to top by flange sealing, and the control device 2 is installed on the upper side of the cylinder 13 and is in the cap 14. The casing 1 with this configuration has the advantages of simple structure and convenient disassembly and maintenance. By installing the control device 2 on the upper side of the cylinder 13, on the one hand, the control device 2 can be inspected, maintained and debugged by opening the cap 14, which improves the convenience of operation. On the other hand, the heat and magnetic field generated by plasma cutting can be avoided to affect the control device 2, thereby improving safety and reliability. In practical applications, the present invention usually provides a fixing frame 21 for the control device 2, and a power supply 22, a DC converter 23 and a plurality of circuit boards 24 are installed on the fixing frame 21, wherein the circuit board 24 is provided with a control circuit and a controller. The control device 2 with this configuration enables the hole-opening machine to work through the internal power supply 22, thereby improving the functionality and convenience of use of the hole-opening machine. As a specific embodiment, the present invention makes the lifting device 3 adopt the following structure: including a second hollow rotating table 31, a screw rod 32 and a plurality of guide rods 33, the second hollow rotating table 31 is installed on the lifting support plate 12, and the first nut 34 is coaxially fixed in the turntable of the second hollow rotating table 31, the screw rod 32 passes through the lifting support plate 12 and the second hollow rotating table 31 and is threadedly matched with the first nut 34, and the plurality of guide rods 33 pass through the corresponding guide sleeves 35 arranged on the lifting support plate 12, wherein the lower ends of the screw rod 32 and the plurality of guide rods 33 are respectively fixedly connected to the pan-tilt support plate 41. The lifting device 3 of this setting has the characteristics of stable structure and smooth lifting action. It should be noted that four guide rods 33 are shown in the figure, but the guide rods 33 can also be set to three or more as needed.

[0049] As an optimization scheme, the present specific implementation scheme provides the material lifting assembly 8 with a support tube 81, an electromagnet 82 and a switch support plate 83. The upper end of the support tube 81 is passed through the swing arm 51, the turntable 43 and the first hollow turntable 42 from bottom to top in sequence and is fixedly connected to the pan / tilt support plate 41. The electromagnet 82 and the switch support plate 83 are installed at the lower end of the support tube 81 through elastic buffers, and a plurality of proximity switches 84 distributed around the electromagnet 82 are installed on the switch support plate 83. The material lifting assembly 8 provided with this configuration has the advantages of simple structure, strong adaptability and high safety. By providing elastic buffers, the electromagnet 82 can be prevented from being squeezed and damaged by the pipe wall during the downward movement of the hole opening device; by providing a plurality of proximity switches 84 around the electromagnet 82, a signal will be triggered when the hole opening device is moved down to the right position, thereby improving the convenience of control. It should be noted that the support tube 81 is coaxially arranged with the first hollow rotating table 42, and is clearance-matched with the swing arm 51, the rotating table 43 and the first hollow rotating table 42 to ensure the state stability of the material lifting assembly 8 and avoid affecting the cutting and opening action. In practical applications, in order to facilitate wiring, the present invention allows the upper end of the support tube 81 to pass through the pan-tilt support plate 41, and sets a plurality of threading holes distributed up and down on the support tube 81. In order to improve the reliability of the triggering signal of the downward movement, the present invention usually evenly sets four proximity switches 84.

[0050] As a specific embodiment, the elastic buffer member of the present invention adopts the following structure: including a tube nut 85, a sleeve 86, a connecting rod 87, a spring 88 and a hexagonal column 89. Among them, the tube nut 85 is screwed on the lower end of the support tube 81 through a thread, the sleeve 86 passes through the bottom wall of the tube nut 85, the outer wall of the sleeve 86 is provided with a first limit platform 861 at the upper side of the bottom wall of the tube nut 85, and the upper half of the inner wall of the sleeve 86 is provided with a second limit platform 862; the connecting rod 87 passes through the sleeve 86, the lower half of the connecting rod 87 is provided with a third limit platform 871 in the sleeve 86, and the lower end of the connecting rod 87 is provided with a fourth limit platform 872 The upper end of the connecting rod 87 is provided with a fifth limit platform 873 located on the upper side of the sleeve 86; the spring 88 is sleeved on the connecting rod 87, and the upper and lower ends of the spring 88 are pressed against the second limit platform 862 and the third limit platform 871 respectively; the upper end of the hexagonal column 89 is screwed on the lower end of the connecting rod 87 through a threaded hole; the top of the electromagnet 82 is screwed on the threaded column integrated with the hexagonal column 89 through a threaded hole, and the switch support plate 83 is fixedly connected to the lower end of the sleeve 86. This elastic buffer has the advantages of simple structure, convenient disassembly and assembly, good buffering effect, and strong adaptability. During the downward movement of the hole opening device, the elastic buffering effect of the spring 88 can prevent the electromagnet 82 from being squeezed and damaged by the pipe wall, thereby improving safety and reliability; and the sleeve 86 and the pipe nut 85 are overlapped by the first limit platform 861, which effectively prevents the pipe wall from squeezing and damaging the proximity switch 84, thereby enhancing safety and reliability. The present invention generally also installs a redundant limit switch 810 on the switch support plate 83 that cooperates with the electromagnet 82, so that when the hole opening device moves down to the position but the lifting device does not stop, the redundant limit switch 810 contacts the electromagnet 82 and triggers a signal, and the lifting device is forced to stop at this time to achieve the purpose of safety protection. Further, in this specific embodiment, a symmetrical limit groove is set at the upper end of the sleeve 86, and a limit block 874 is set on the connecting rod 87 in the limit groove. Through the cooperation of the limit groove and the limit block 874, the electromagnet 82 and the switch support plate 83 can be prevented from rotating relative to each other, thereby enhancing the stability of the structure.

[0051] As a specific embodiment, the present invention makes the slide rail assembly 6 adopt the following structure: it includes a base 61, a guide rail 62, a slider 63, a motor 64, a screw 65 and a slide 66, wherein the base 61 is fixed on the bracket plate 52, and the upper and lower ends of the base 61 are correspondingly provided with an upper end plate 611 and a lower end plate 612; the guide rail 62 is fixed on the base 61, and the slider 63 is clamped on the guide rail 62 so that the two are slidably matched; the motor 64 is fixed on the upper end plate 611, and the lower end of the screw 65 is installed on the lower end plate 612 through a bearing 67, and the upper end of the screw 65 is connected to the shaft output shaft of the motor 64 through a coupling 68; the slide 66 is fixedly connected to the slider 63 and the adapter 71 respectively, and a second nut 69 matching the screw 65 is fixed in the slide 66. The slide rail assembly 6 of this structural arrangement is characterized by easy assembly and disassembly and smooth movement. When the motor 64 drives the lead screw 65 to rotate, the second nut 69 cooperates with the lead screw 65 to make the slide table 66, the slider 63, and the adapter seat 71 slide up and down along the guide rail 62.

[0052] As an optimization scheme, in this specific embodiment, an axial photoelectric switch 614 is installed on one side of the base 61 through a first fixing bar 613, and an upper limit switch 616 and a lower limit switch 617 are installed on the other side of the base 61 through a second fixing bar 615; an axial baffle 661 that cooperates with the axial photoelectric switch 614 is provided on one side of the slide 66, and a baffle 662 that cooperates with the upper limit switch 616 and the lower limit switch 617 is provided on the other side of the slide 66. Through the cooperation of the axial photoelectric switch 614 and the axial baffle 661, the plasma cutting gun 72 and the laser rangefinder 73 can be axially positioned to determine their axial initial positions, thereby improving the convenience and accuracy of control. Through the cooperation of the upper limit switch 616 and the lower limit switch 617 with the baffle 662, the up and down movement range of the slide rail assembly 6 can be limited to avoid damage to the relevant components caused by movement beyond the range, thereby ensuring safety. In addition, this specific embodiment also provides mutually cooperating radial photoelectric switches (not shown in the figure) and radial baffles (not shown in the figure) on the pan-tilt support plate 41 and the swing arm 51 to radially position the plasma cutting gun 72 and the laser rangefinder 73 and determine their radial initial positions.

[0053] It should be noted that, in practical applications, the laser rangefinder 73 is fixed to one side of the adapter seat 71 through an adapter plate, and the camera or infrared rangefinder 74 is fixed to the other side of the adapter seat 71 through an adapter plate. In order to facilitate vacuuming and release operations during hole opening, the present invention sets a vacuum valve 111 and a release valve 112 on the connecting box 11; in order to facilitate the connection of the cutting gas path and ensure the sealing, the present invention also seals and fixes a gas pipe joint 131 on the cylinder 13, so that the plasma cutting gun 72 and the cutting gas source are connected through the gas pipe joint 17.

[0054] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the protection scope of the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should fall within the protection scope determined by the claims of the present invention.

Claims

1. A highly reliable pipe plasma drilling machine, comprising a housing (1) and a control device (2), a lifting device (3) and a drilling device arranged in the housing (1), wherein the drilling device comprises a pan-tilt assembly (4), a swing arm assembly (5), a slide rail assembly (6), a cutting assembly (7) and a material lifting assembly (8), characterized in that: The pan head assembly (4) comprises a pan head support plate (41) connected to the lifting device (3), a first hollow rotating platform (42) is mounted on the pan head support plate (41), a rotating platform (43) is coaxially fixed on the rotating plate of the first hollow rotating platform (42), the swing arm assembly (5) comprises a swing arm (51) and a bracket plate (52), the swing arm (51) is horizontally fixed on the rotating platform (43), the bracket plate (52) is vertically fixed on the swing arm (51), the slide rail assembly (6) is vertically mounted on the bracket plate (52), the cutting assembly (7) comprises an adapter seat (71) connected to the slide rail assembly (6), a plasma cutting gun (72) is fixed in the middle of the adapter seat (71), a laser rangefinder (73) is provided on one side of the plasma cutting gun (72), and a laser rangefinder (73) is provided on the other side of the plasma cutting gun (72). A camera or an infrared rangefinder (74) is provided, and the vertical distances from the plasma cutting gun (72) and the laser rangefinder (73) to the axis of the first hollow rotating table (42) are equal. The material lifting component (8) is fixedly connected to the pan-tilt support plate (41) and is used to extract the cut pipe wall; the material lifting component (8) comprises a support tube (81), an electromagnet (82) and a switch support plate (83), the upper end of the support tube (81) passes through the swing arm (51), the rotating table (43) and the first hollow rotating table (42) from bottom to top in sequence and is fixedly connected to the pan-tilt support plate (41), the electromagnet (82) and the switch support plate (83) are installed at the lower end of the support tube (81) through an elastic buffer, and a plurality of proximity switches (84) distributed around the electromagnet (82) are installed on the switch support plate (83).

2. A highly reliable pipe plasma drilling machine according to claim 1, characterized in that: The casing (1) comprises a connecting box (11), a lifting support plate (12), a cylinder (13) and a cover cap (14) which are connected in sequence from bottom to top through flange sealing. The control device (2) is fixed on the upper side of the cylinder (13) and is located in the cover cap (14). The lifting device (3) comprises a second hollow rotating platform (31), a screw rod (32) and a plurality of guide rods (33). The second hollow rotating platform (31) is installed on the lifting support plate (12). A first nut (34) is coaxially fixed in the rotating plate of the second hollow rotating platform (31). The screw rod (32) passes through the lifting support plate (12) and the second hollow rotating platform (31) and is threadedly matched with the first nut (34). The plurality of guide rods (33) pass through guide sleeves (35) correspondingly arranged on the lifting support plate (12). The lower ends of the screw rod (32) and the plurality of guide rods (33) are respectively fixedly connected to the pan / tilt support plate (41).

3. A highly reliable pipe plasma drilling machine according to claim 2, characterized in that: The elastic buffer comprises a tube nut (85), a sleeve (86), a connecting rod (87), a spring (88) and a hexagonal column (89); the tube nut (85) is screwed onto the lower end of the support tube (81) through a thread; the sleeve (86) passes through the bottom wall of the tube nut (85); the outer wall of the sleeve (86) is provided with a first limiting platform (861) at the upper side of the bottom wall of the tube nut (85); the upper half of the inner wall of the sleeve (86) is provided with a second limiting platform (862); the connecting rod (87) passes through the sleeve (86); the lower half of the connecting rod (87) is provided with a third limiting platform (871) in the sleeve (86); and the lower end of the connecting rod (87) is provided with a fourth limiting platform (872). The upper end of the connecting rod (87) is provided with a fifth limiting platform (873) located on the upper side of the sleeve (86); the spring (88) is sleeved on the connecting rod (87); the upper and lower ends of the spring (88) are pressed against the second limiting platform (862) and the third limiting platform (871) respectively; the upper end of the hexagonal column (89) is screwed on the lower end of the connecting rod (87) through a threaded hole; the upper end of the sleeve (86) is also provided with a symmetrical limiting groove, and the connecting rod (87) is provided with a limiting block (874) located in the limiting groove; the top of the electromagnet (82) is screwed on the threaded column integrated with the hexagonal column (89) through a threaded hole, and the switch support plate (83) is fixedly connected to the lower end of the sleeve (86).

4. A highly reliable pipe plasma drilling machine according to claim 3, characterized in that: The slide rail assembly (6) comprises a base (61), a guide rail (62), a slider (63), a motor (64), a lead screw (65) and a slide table (66). The base (61) is fixed on the bracket plate (52). The upper and lower ends of the base (61) are respectively provided with an upper end plate (611) and a lower end plate (612). The guide rail (62) is fixed on the base (61). The slider (63) is clamped on the guide rail (62) so that the two are slidably matched. The motor (64) is fixed on the upper end plate (611). The lower end of the lead screw (65) is mounted on the lower end plate (612) through a bearing (67). The upper end of the lead screw (65) is connected to the shaft output shaft of the motor (64) through a coupling (68). The slide table (66) is respectively fixedly connected to the slider (63) and the adapter seat (71). The slide table (66) is provided with a second nut (69) matched with the lead screw (65).

5. A highly reliable pipe plasma drilling machine according to claim 4, characterized in that: An axial photoelectric switch (614) is installed on one side of the base (61) via a first fixing strip (613), an upper limit switch (616) and a lower limit switch (617) are installed on the other side of the base (61) via a second fixing strip (615), an axial baffle (661) cooperating with the axial photoelectric switch (614) is provided on one side of the slide (66), and a baffle (662) cooperating with the upper limit switch (616) and the lower limit switch (617) is provided on the other side of the slide (66).

6. A highly reliable pipe plasma drilling machine according to claim 5, characterized in that: The control device (2) comprises a fixing frame (21), a power supply (22), a DC converter (23) and a plurality of circuit boards (24) mounted on the fixing frame (21), wherein a control circuit and a controller are provided on the circuit board (24).

7. A highly reliable pipe plasma drilling machine according to claim 5, characterized in that: Four proximity switches (84) are evenly arranged along the circumference of the switch support plate (83), and a redundant limit switch (810) cooperating with the electromagnet (82) is also installed on the switch support plate (83).

8. The high-reliability pipeline plasma drilling machine according to claim 5, characterized in that: The upper end of the support tube (81) passes through the pan / tilt support plate (41), and a plurality of threading holes distributed up and down are provided on the support tube (81); the laser rangefinder (73) is fixed to one side of the adapter seat (71) via an adapter plate, and the camera or infrared rangefinder (74) is fixed to the other side of the adapter seat (71) via an adapter plate.

9. A highly reliable pipe plasma drilling machine according to claim 5, characterized in that: The connecting box (11) is provided with a vacuum valve (111) and a relief valve (112), and a gas transmission pipe joint (131) is sealed and fixed on the cylinder (13).

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