A pipe plasma drilling machine

Abstract

The present invention relates to a 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 being installed on the pan head support plate, a rotating table being fixed to the rotating disk of the first hollow rotating table, the swing arm assembly comprising a swing arm horizontally fixed on the rotating table, a bracket plate being vertically fixed on the swing arm, the slide rail assembly being vertically installed on the bracket plate, the cutting assembly comprising an adapter connected to the slide rail assembly, a plasma cutting gun and a laser rangefinder being fixed on the adapter, the vertical distances of the plasma cutting gun and the laser rangefinder to the axis of the first hollow rotating table being equal, and the material lifting assembly being used to extract the cut pipe wall. It has the advantages of light weight, strong functionality, safety and 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. 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 pipeline plasma hole opening machine, which has the advantages of compact structure, light weight, strong functionality, safety and reliability, and fast hole opening speed, which can effectively improve work efficiency and reduce use and maintenance costs and labor intensity.

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a pipeline plasma hole opening machine, including a casing and a control device, a lifting device and a hole opening device arranged in the casing, the hole opening device including a pan head assembly, a swing arm assembly, a slide rail assembly, a cutting assembly and a material lifting assembly, the pan head assembly includes 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 includes a swing arm horizontally fixed on the turntable, a bracket plate is vertically fixed on the swing arm, the slide rail assembly is vertically installed on the bracket plate, the cutting assembly includes an adapter connected to the slide rail assembly, a plasma cutting gun and a laser rangefinder are fixed on the adapter, the vertical distances of 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 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 installed 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 driving 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 driving 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 pipeline 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 in sequence and is fixedly connected to the pan head 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 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, the lower end of the connecting rod is provided with a 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 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 pipeline plasma hole opening machine, wherein the upper end of the sleeve is provided with symmetrical limiting grooves, and the connecting rod is provided with limiting blocks located in the limiting grooves.

[0009] Furthermore, the present invention provides a pipeline 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; 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.

[0010] Furthermore, the present invention provides a pipeline 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 correspondingly fixed 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 installed 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 sliding nut matching the lead screw is fixed in the slide table.

[0011] Furthermore, the present invention provides a 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 matching with the axial photoelectric switch is fixed on one side of the slide, and a baffle matching with the upper limit switch and the lower limit switch is fixed on the other side of the slide.

[0012] Furthermore, the present invention provides a pipeline 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.

[0013] Furthermore, the present invention provides a pipeline plasma hole opening machine, wherein the connecting box is provided with a vacuum valve and a relief valve, and the cylinder is sealed and fixed with a gas pipe joint.

[0014] Compared with the prior art, the present invention has the following advantages: the present invention sets 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-tilt assembly, a swing arm assembly, a slide rail assembly, a cutting assembly and a material lifting assembly, the pan-tilt assembly is provided with a pan-tilt support plate connected to the lifting device, a first hollow rotating table is installed on the pan-tilt support plate, the turntable is coaxially fixed on the turntable of the first hollow rotating table, the swing arm assembly is provided with a swing arm horizontally fixed on the turntable, a bracket plate is vertically fixed on the swing arm, the slide rail assembly is vertically installed on the bracket plate, the cutting assembly is provided with an adapter connected to the slide rail assembly, a plasma cutting gun and a laser rangefinder are fixed on the adapter, 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-tilt support plate and used to extract the cut pipe wall. Thus, a pipeline plasma hole-opening machine with compact structure, light weight, strong functionality, safety and reliability, and fast hole-opening speed is formed. In practical applications, the hole-opening machine is installed on the welding pipe fitting through the 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 it is moved down to the position. 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 for one circle and the cutting path is scanned by controlling the first hollow rotating table. Subsequently, the plasma cutting gun is started, the first hollow rotating table is rotated for one circle at a set speed, and the distance from the plasma cutting gun to the pipe wall is controlled according to the cutting path. After the pipe wall is cut, the first hollow rotating table, the slide rail assembly and the plasma cutting gun are stopped. Finally, the hole-opening device is moved up to the hole-opening machine by controlling the lifting device, and 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 can effectively reduce the overall weight and use and maintenance cost of the hole-opening machine. By using a laser rangefinder to detect the distance to the pipe wall and establish a cutting path, and making the vertical distances from the laser rangefinder and the plasma cutting gun to the axis of the first hollow rotating table equal, and utilizing the angle and height difference between the two and the rotation speed of the first hollow rotating table, it is easy to keep the distance from the plasma cutting gun to the pipe wall within the working distance range by controlling the slide rail assembly, thereby improving the convenience of control and the stability and reliability of cutting.

[0015] The following is a further detailed description of a 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 pipeline plasma hole opening machine of the present invention;

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

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

[0019] Figure 4 It is a three-dimensional diagram of a lifting device and a hole-opening device in a pipeline plasma hole-opening machine of the present invention;

[0020] Figure 5 The invention discloses a three-dimensional structure of a lifting support plate and a second hollow rotating table in a pipeline plasma hole opening machine. Figure 1 ;

[0021] Figure 6 The invention discloses a three-dimensional structure of a lifting support plate and a second hollow rotating table in a pipeline plasma hole opening machine. Figure 2 ;

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

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

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

[0025] Fig.10 A three-dimensional diagram of a hole-opening device in a pipeline plasma hole-opening machine according to the present invention Figure 1 ;

[0026] Fig.11 A three-dimensional diagram of a hole-opening device in a pipeline plasma hole-opening machine according to the present invention Figure 2 ;

[0027] Fig.12 A three-dimensional diagram of a pan / tilt assembly in a 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 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 pipeline plasma hole opening machine of the present invention;

[0030] Fig.15 A stereoscopic diagram of a slide rail assembly in a 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 component in a pipeline plasma hole opening machine of the present invention Figure 1 ;

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

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

[0035] Fig. 20 It is a three-dimensional diagram of a material lifting component in a pipeline plasma hole opening machine of 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 pipeline plasma hole opening machine of the present invention;

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

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

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

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

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

[0043] Fig.28 The installation and use status of a pipeline plasma drilling machine of the present invention Figure 1 ;

[0044] Fig.29 The installation and use status of a pipeline plasma drilling machine of the present invention 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 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-tilt assembly 4, a swing arm assembly 5, a slide rail assembly 6, a cutting assembly 7 and a material lifting assembly 8. The pan-tilt assembly 4 is provided with a pan-tilt support plate 41 connected to the lifting device 3, a first hollow rotating table 42 is installed on the pan-tilt 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 horizontally fixed on the turntable 43, and a bracket plate 52 is vertically fixed on the swing arm 51. The slide rail assembly 6 is vertically installed on the bracket plate 52, and the cutting assembly 7 is provided with an adapter 71 connected to the slide rail assembly 6, and a plasma cutting gun 72 and a laser rangefinder 73 are fixed on the adapter 71, 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 configuration constitutes a pipeline plasma hole opening machine with compact structure, light weight, strong functionality, safety and reliability, and fast hole opening speed. In practical applications, the hole opening machine is installed on the welding pipe fitting 200 through the gate valve 100. During the hole opening operation, the hole opening device is first moved down from the hole opening machine to the welding pipe fitting 200 by controlling the lifting device 3, and the lifting device 3 is stopped after it 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. Subsequently, 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 cutting is completed, the first hollow rotating table 42, the slide rail assembly 6 and the plasma cutting gun 72 are stopped. Finally, the subsequent process can be carried out after the hole-opening device is moved up to the hole-opening machine by controlling the lifting device 3, and the cut pipe wall will be extracted by the lifting assembly 8. 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 can effectively reduce the overall weight and maintenance cost of the hole-opening machine. By using a laser rangefinder 73 to detect the distance to 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 to that of the plasma cutting gun 72, by using the angle between the two, the height difference and the 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 opening. It should be noted that the scanning and cutting path refers to the laser rangefinder rotating one circle and detecting and recording the distance from the pipe wall; 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 to the pipe 300 to be opened, the gate valve 100 and the welding pipe fitting 200 are commonly used equipment in this field, and 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 and maintained by opening the cap 14, which improves the convenience of operation, and on the other hand, the heat and magnetic field generated by plasma cutting can be avoided from affecting the control device 2, thereby improving the safety and reliability of control. In practical applications, the present invention usually provides a fixing frame 21 for the control device 2, and installs a power supply 22, a DC converter 23 and a plurality of circuit boards 24 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 structure 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 provides a lifting device 3 with a second hollow rotating table 31, a screw rod 32 and a plurality of guide rods 33, wherein the second hollow rotating table 31 is installed on the lifting support plate 12, a driving nut 311 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 driving nut 311, and a plurality of guide rods 33 pass through the guide sleeve 34 correspondingly arranged on the lifting support plate 12, and 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 configuration has the characteristics of simple 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 makes the material lifting assembly 8 adopt the following structure: including a support tube 81, an electromagnet 82 and a switch support plate 83, wherein the upper end of the support tube 81 passes through the swing arm 51, the turntable 43 and the first hollow turntable 42 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 with this configuration has the advantages of simple structure, strong adaptability and high safety. By setting elastic buffers, the electromagnet 82 can be prevented from being squeezed by the pipe wall and damaged during the downward movement of the hole-opening device, thereby improving safety; by setting a plurality of proximity switches 84 around the electromagnet 82, a signal will be triggered when the hole-opening device moves down to the right position, thereby improving the convenience of control. It should be pointed out 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 lifting assembly 8 and avoid affecting the cutting and opening action.

[0050] As a specific embodiment, the present invention provides an elastic buffer with 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, the sleeve 86 is passed through the bottom wall of the tube nut 85, and a first limit platform 861 is provided on the outer wall of the sleeve 86 and at the upper side of the bottom wall of the tube nut 85, and a second limit platform 862 is provided on the upper half of the inner wall of the sleeve 86. The connecting rod 87 is passed through the sleeve 86, and a third limit platform 871 is provided in the sleeve 86 at the lower half of the connecting rod 87, a fourth limit platform 872 is provided at the lower end of the connecting rod 87, and a fifth limit platform 873 is provided at the upper end of the connecting rod 87 and at 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, and the hexagonal column 89 is screwed on the lower end of the connecting rod 87 through the threaded hole at its upper end. Among them, the electromagnet 82 is screwed on the threaded column integrated with the hexagonal column 89 through the threaded hole at its top, and the switch support plate 83 is fixedly connected to the lower end of the sleeve 86. The elastic buffer component of this arrangement 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 overlapping of the sleeve 86 and the pipe nut 85 through the first limit platform 861 can effectively prevent the pipe wall from squeezing and damaging the proximity switch 84, thereby enhancing safety. As an optimization solution, this specific embodiment provides a symmetrical limit groove at the upper end of the sleeve 86, and a limit block 874 in the limit groove is provided on the connecting rod 87. The cooperation between the limit groove and the limit block 874 can prevent the electromagnet 82 and the switch support plate 83 from rotating relative to each other, thereby enhancing the stability of the structure.

[0051] As a specific implementation, 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 multiple threading holes distributed up and down are set on the support tube 81. In practical applications, the present invention usually evenly sets four proximity switches 84 along the circumference of the switch support plate 83 to improve the reliability of triggering the downward movement signal. In order to enhance safety and reliability, this specific implementation also installs a redundant limit switch 810 that cooperates with the electromagnet 82 on the switch support plate 83. When the hole opening device moves down to the position but the lifting device does not stop, the redundant limit switch 810 will contact the electromagnet 82 and trigger the signal. At this time, the safety protection purpose can be achieved by forcibly stopping the lifting device.

[0052] As a specific embodiment, the present invention provides the slide rail assembly 6 with 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 correspondingly fixed 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 and 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 installed 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 fixedly connected to the slider 63 and the adapter 71 respectively, and a sliding nut 69 matched with the lead screw 65 is fixed in the slide table 66. The slide rail assembly 6 of this structure has the advantages of convenient disassembly and assembly and smooth transmission. When the motor 64 drives the lead screw 65 to rotate, the slide nut 69 cooperates with the lead screw 65 to make the slide table 66, the slider 63 and the adapter seat 71 move up and down along the guide rail 62.

[0053] 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; and 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. This setting can axially position the plasma cutting gun 72 and the laser rangefinder 73 through the cooperation of the axial photoelectric switch 614 and the axial baffle 661, so as 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 practical applications, the present invention 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.

[0054] It should be noted that, in actual application, the present invention also provides a vacuum valve 15 and a relief valve 16 on the connecting box 11, so as to perform corresponding vacuuming and relief operations during the hole opening operation; and a sealed and fixed gas pipe joint 17 is provided on the cylinder 13, so that the plasma cutting gun 72 and the cutting gas source are connected through the gas pipe joint 17 to ensure the sealing of the cutting space.

[0055] 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 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-tilt assembly (4) comprises a pan-tilt support plate (41) connected to the lifting device (3), a first hollow rotating platform (42) is mounted on the pan-tilt 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) horizontally fixed on the rotating platform (43), a 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) and a laser rangefinder (73) are fixed on the adapter seat (71), and the plasma cutting gun (72) and the laser rangefinder (73) are The vertical distance from the optical rangefinder (73) to the axis of the first hollow rotating table (42) is equal; the lifting assembly (8) is fixedly connected to the pan-tilt support plate (41) and is used to extract the cut tube wall; the lifting assembly (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) 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 pipeline 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 mounted 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 mounted on the lifting support plate (12). A driving nut (311) 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 driving nut (311). The plurality of guide rods (33) pass through guide sleeves (34) 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 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). 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), 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).

4. A pipeline plasma drilling machine according to claim 3, characterized in that: The upper end of the sleeve (86) is provided with a symmetrical limiting groove, and the connecting rod (87) is provided with a limiting block (874) located in the limiting groove.

5. A pipeline plasma drilling machine according to claim 4, 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); 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).

6. A pipeline plasma drilling machine according to claim 2, 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); an upper end plate (611) and a lower end plate (612) are fixed to the upper and lower ends of the base (61) respectively; the guide rail (62) is fixed on the base (61); the slider (63) is clamped on the guide rail (62) and the two slide together. The motor (64) is fixed on the upper end plate (611), the lower end of the lead screw (65) is installed 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 fixedly connected to the slider (63) and the adapter seat (71) respectively, and a sliding nut (69) that cooperates with the lead screw (65) is fixed in the slide table (66).

7. A pipeline plasma drilling machine according to claim 6, 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) matched with the axial photoelectric switch (614) is fixed on one side of the slide (66), and a baffle (662) matched with the upper limit switch (616) and the lower limit switch (617) is fixed on the other side of the slide (66).

8. The pipeline plasma drilling machine according to claim 2, 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).

9. The pipeline plasma drilling machine according to claim 2, characterized in that: The connecting box (11) is provided with a vacuum valve (15) and a relief valve (16), and a gas transmission pipe joint (17) is sealed and fixed on the cylinder (13).

Images