CN214134425U - High-reliability plasma cutting and perforating device for pipeline - Google Patents

Abstract

The utility model relates to a high reliable pipeline plasma cutting trompil device, including the cloud platform subassembly, the swing arm subassembly, slide rail set spare and cutting assembly, the cloud platform subassembly includes the cloud platform supporting disk, cavity revolving stage and revolving stage, the swing arm subassembly includes swing arm and mounting panel, the swing arm level is fixed on the revolving stage, mounting panel vertical fixation is in the swing arm, the vertical installation of slide rail set spare is on the mounting panel, cutting assembly includes the adapter seat of being connected with slide rail set spare, the middle part of adapter seat is fixed with plasma cutting rifle, one side of plasma cutting rifle is equipped with laser range finder, the opposite side of plasma cutting rifle is equipped with camera instrument or infrared range finder, plasma cutting rifle and laser range finder equal to the vertical distance of cavity revolving stage axis. The drilling machine has the advantages of compact structure, light weight, high drilling speed, strong functionality and high reliability, can effectively improve the operation efficiency, and reduces the use and maintenance cost and the labor intensity.

Description

High-reliability plasma cutting and perforating device for pipeline

Technical Field

The utility model relates to a pipeline trompil device, concretely relates to pipeline trompil device based on plasma cutting just has error correction function.

Background

In the operation and management process of a gas pipe network, connection, cutting and line changing operation is often required, and pipeline opening is an important process of connection, cutting and line changing. At present, the pipeline tapping machine adopted in the field is mainly a cylindrical cutter type tapping machine, and a plurality of problems exist in the practical application, which are mainly shown in the following aspects: 1. the product is heavy, a hydraulic station needs to be specially equipped, and the installation and the transportation are inconvenient; 2. the hole opening efficiency is low, the time of opening a hole for one time is usually consumed for several hours, and the hole opening is completed by cooperation of a plurality of people, so the labor intensity is high; 3. the cylinder cutter has high abrasion speed and higher use and maintenance cost; 4. the diameter of the opening hole has certain limitation, and the requirement for the opening hole with large caliber cannot meet the use requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high reliable pipeline plasma cutting trompil device, it has compact structure, light in weight, trompil fast, functional strong, the high advantage of reliability, can effectively improve the operating efficiency, reduces and uses maintenance cost and intensity of labour.

In order to solve the problems in the prior art, the utility model provides a high-reliability plasma cutting and perforating device for pipelines, which comprises a holder component, a swing arm component, a slide rail component and a cutting component, the holder assembly comprises a holder supporting plate and a hollow rotating table fixed on the holder supporting plate, the rotating table of the hollow rotating table is coaxially fixed with the hollow rotating table, the swing arm assembly comprises a swing arm and a support plate, the swing arm is horizontally fixed on the turntable, the support plate is vertically fixed on the swing arm, the vertical installation of slide rail set spare is on the mounting panel, cutting assembly includes the adapter of being connected with slide rail set spare, and the middle part of adapter is fixed with plasma cutting rifle, and one side of plasma cutting rifle is equipped with laser range finder, and the opposite side of plasma cutting rifle is equipped with appearance or infrared ray range finder of making a video recording, and plasma cutting rifle and laser range finder equal to the perpendicular distance of cavity revolving stage axis.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, still include the waste material extraction element, the waste material extraction element includes stay tube, electro-magnet and switch supporting disk, and swing arm, revolving stage and hollow revolving stage are passed and with cloud platform supporting disk fixed connection to the upper end of stay tube, and electro-magnet and switch supporting disk pass through elastic buffer and install the lower extreme at the stay tube, install a plurality of proximity switches that distribute around the electro-magnet on the switch supporting disk.

Further, the utility model relates to a high reliable pipeline plasma cutting trompil device, wherein, elastic buffer includes pipe nut, sleeve pipe, connecting rod, spring and hexagonal post, the pipe nut is adorned at the lower extreme of stay tube through the screw soon, the sleeve pipe passes the diapire of pipe nut, the sheathed tube outer wall is equipped with first spacing platform in the upside position of pipe nut diapire, the first half of sheathed tube inner wall is equipped with the second spacing platform, the connecting rod passes the sleeve pipe, the lower half of connecting rod is equipped with the third spacing platform that is in the sleeve pipe, the lower extreme of connecting rod is equipped with the fourth spacing platform, the upper end of connecting rod is equipped with the fifth spacing platform that is in the sleeve pipe upside, the spring housing is on the connecting rod, the last lower extreme of spring corresponds the top and presses on second spacing platform and third spacing platform, the upper end of hexagonal post is adorned at the lower extreme of connecting rod through the screw hole soon; the top of the electromagnet is rotatably arranged on a threaded column integrated with the hexagonal column through a threaded hole, and the switch supporting disc is fixedly connected with the lower end of the sleeve.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, sheathed tube upper end is equipped with the spacing groove of symmetry, be equipped with the stopper that is in the spacing groove on the connecting rod.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, slide rail set spare includes base, guide rail, slider, motor, lead screw and slip table, the base is fixed on the mounting panel, the last lower extreme of base corresponds and is fixed with upper end plate and lower end plate, the guide rail is fixed on the base, the slider clamps on the guide rail and makes both sliding fit, the motor is fixed between upper end plate and swing arm, the lower extreme of lead screw passes through the bearing and installs on the lower end plate, the upper end of lead screw is passed through the axle coupling and is connected with the axle output of motor, the slip table respectively with slider and switching seat fixed connection, be equipped with in the slip table with lead screw complex nut.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, axial photoelectric switch is installed through first fixed strip to one side of base, be fixed with on the slip table with axial photoelectric switch complex axial separation blade.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, limit switch and lower limit switch are installed to the opposite side of base through the second fixed strip, be fixed with on the slip table with upper limit switch and lower limit switch complex dog.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, proximity switch evenly is equipped with four along the circumference of switch supporting disk, still installs on the switch supporting disk with the redundant limit switch of electro-magnet complex.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, the cloud platform supporting disk is run through to the upper end of stay tube, is equipped with a plurality of through wires holes on the stay tube.

Further, the utility model relates to a highly reliable pipeline plasma cutting trompil device, wherein, the plasma cutting rifle passes through anchor clamps and buckle to be fixed on the adapter, laser range finder passes through the adapter plate to be fixed in one side of adapter, appearance or infrared range finder pass through the adapter plate and fix the opposite side at the adapter.

The utility model relates to a high reliable pipeline plasma cutting trompil device compares with prior art, has following advantage: the utility model discloses a set up the cloud platform subassembly, the swing arm subassembly, slide rail set spare and cutting assembly, make the cloud platform subassembly set up the cloud platform supporting disk and fix the cavity revolving stage on the cloud platform supporting disk, coaxial fixed hollow revolving stage on the carousel of cavity revolving stage, make the swing arm subassembly set up swing arm and mounting panel, fix the swing arm level on the revolving stage, with mounting panel vertical fixation in the swing arm, with the vertical installation on the mounting panel of slide rail set spare, make cutting assembly set up the adapter of being connected with slide rail set spare, at the fixed plasma cutting rifle of the middle part of adapter, set up laser range finder in one side of plasma cutting rifle, opposite side at plasma cutting rifle sets up camera or infrared range finder, and make plasma cutting rifle and laser range finder equal to the vertical distance of cavity revolving stage axis. Therefore, the high-reliability plasma cutting and perforating device for the pipeline is formed. In practical application, the tapping device is connected with a lifting device in the tapping machine through a holder supporting plate. When the hole is opened, the hole opening device is firstly moved downwards from the connecting box to the welded pipe fitting by controlling the lifting device, and the lifting device is stopped after the hole opening device is moved downwards to the proper position. And then the plasma cutting gun and the laser range finder are moved to the set initial positions by controlling the hollow rotating table and the sliding rail assembly. And then the swing arm assembly, the slide rail assembly, the plasma cutting gun and the laser range finder rotate for a circle by controlling the hollow rotating platform, and the cutting path is scanned by the laser range finder. And then starting the plasma cutting gun, rotating the hollow rotating platform for a circle at a set speed, controlling the distance between the plasma cutting gun and the pipe wall according to the cutting path, and stopping the hollow rotating platform, the sliding rail assembly and the plasma cutting gun after the pipe wall is cut. And finally, the hole opening device is moved upwards to the connecting box by controlling the lifting device, and then the subsequent process can be carried out. The utility model discloses an adopt the plasma cutting to carry out the pipeline trompil, compare with traditional section of thick bamboo sword trompil and improved trompil speed and work efficiency greatly, and can effectively reduce the whole weight and the use maintenance cost of tapping machine, show through practical application, adopt the plasma cutting to open a hole only need several minutes can accomplish. Through adopting laser range finder to cut the route scanning to make laser range finder and plasma cutting rifle equal to the perpendicular distance of cavity revolving stage axis, utilize contained angle, difference in height and the rotational speed of cavity revolving stage between them, make the distance of plasma cutting rifle to the pipe wall keep in the working distance within range through controlling slide rail set spare very easily, improved the convenience of control and the reliability of cutting. Through setting up appearance or infrared distance meter of making a video recording, when the cutting of breaking down or not cutting off the pipe wall completely because of the error in the cutting trompil in-process, can seek the uncut position fast, fix a position this position with the plasma cutting rifle behind the definite position and cut once more and can realize the error correction purpose, improved functional, reliability and the practicality of trompil device. When the camera is adopted, the uncut position can be found manually, and the plasma cutting gun is positioned; when the infrared distance measuring instrument is adopted, the vertical distance between the infrared distance measuring instrument and the axis of the hollow rotating platform is equal to the vertical distance between the plasma cutting gun and the axis of the hollow rotating platform, so that the infrared distance measuring instrument detects the distance along a cutting path by rotating the hollow rotating platform, the distance detection value of an area after cutting is large, the distance detection value of an area which is not cut or is not cut through is obviously reduced, and the position and the area which are not cut can be quickly determined by the difference.

The following describes the high-reliability plasma cutting and perforating device for pipes in detail with reference to the embodiments shown in the drawings.

Drawings

Fig. 1 is a front view of a highly reliable plasma cutting and perforating device for pipes according to the present invention;

fig. 2 is a left side view of the high-reliability plasma cutting and perforating device for pipelines of the present invention;

FIG. 3 is a right side view of the high reliability plasma cutting and perforating device for pipes of the present invention;

fig. 4 is a first perspective view of the high-reliability plasma cutting and perforating device for pipelines of the present invention;

fig. 5 is a second perspective view of the high-reliability plasma cutting and perforating device for pipelines of the present invention;

fig. 6 is a first perspective view of a first cradle head assembly in the high-reliability plasma cutting and perforating device for pipelines of the present invention;

fig. 7 is a second perspective view of the cradle head assembly in the high-reliability plasma cutting and perforating device for pipelines of the present invention;

fig. 8 is a front view of a slide rail assembly in a high reliability plasma cutting and perforating apparatus for pipes of the present invention;

fig. 9 is a perspective view of a slide rail assembly in a high-reliability plasma cutting and perforating device for pipes according to the present invention;

FIG. 10 is a view taken along line A-A of FIG. 8;

fig. 11 is a first perspective view of a cutting assembly of the high-reliability plasma cutting and perforating device for pipes of the present invention;

fig. 12 is a second perspective view of a cutting assembly of the high-reliability plasma cutting and perforating device for pipes of the present invention;

FIG. 13 is a front view of the waste extraction assembly of the high reliability plasma cutting and perforating apparatus for pipes of the present invention;

FIG. 14 is a perspective view of a waste extraction assembly of the high reliability plasma cutting and perforating apparatus for pipes of the present invention;

FIG. 15 is a view from the B-B direction in FIG. 13;

fig. 16 is a front view of the elastic buffer of the plasma cutting and perforating device for highly reliable pipes of the present invention;

fig. 17 is a left side view of the elastic buffer member in the high reliability plasma cutting and perforating device for pipes of the present invention;

fig. 18 is a perspective view of the elastic buffer of the plasma cutting and perforating device for pipelines of the present invention;

FIG. 19 is a view taken along line C-C of FIG. 17;

fig. 20 is a schematic view of the installation and use status of the high-reliability plasma cutting and perforating device for pipelines of the present invention.

Detailed Description

It should be noted that, in the present invention, the terms of upper, lower, left, right, front, rear and the like are only described according to the accompanying drawings, so as to facilitate understanding, and are not intended to limit the technical solution and the scope of the present invention.

Fig. 1 to fig. 20 show a specific embodiment of a high-reliability plasma cutting and perforating device for pipelines, which comprises a holder assembly 1, a swing arm assembly 2, a slide rail assembly 3 and a cutting assembly 4. The pan/tilt head assembly 1 is provided with a pan/tilt head support plate 11 and a hollow rotary table 12 fixed to the pan/tilt head support plate 11, and a hollow rotary table 13 is coaxially fixed to a rotary table of the hollow rotary table 12. The swing arm assembly 2 is provided with a swing arm 21 and a support plate 22, the swing arm 21 is horizontally fixed on the rotary table 13, the support plate 22 is vertically fixed on the swing arm 21, and the slide rail assembly 3 is vertically installed on the support plate 22. The cutting assembly 4 is provided with an adapter 41 connected with the sliding rail assembly 3, a plasma cutting gun 42 is fixed in the middle of the adapter 41, a laser range finder 43 is arranged on one side of the plasma cutting gun 42, a camera or an infrared range finder 44 is arranged on the other side of the plasma cutting gun 42, and the vertical distances from the plasma cutting gun 42 and the laser range finder 43 to the axis of the hollow rotating platform 12 are equal.

Through the structure, the high-reliability plasma cutting and perforating device for the pipeline is formed. In practical application, the tapping device is connected with the lifting device 100 in the tapping machine through the pan-tilt support plate 11. During the hole forming operation, the hole forming device is first moved downwards from the connecting box 200 to the welded pipe fitting 400 by controlling the lifting device, and the lifting device is stopped after the hole forming device is moved downwards to the proper position. The plasma cutting torch 42 and the laser rangefinder 43 are then moved to the set initial position by controlling the hollow rotary table 12 and the sled assembly 3. The swing arm assembly 2, the slide rail assembly 3, the plasma cutting torch 42 and the laser range finder 43 are then rotated one revolution by controlling the hollow rotary table 12, and the cutting path is scanned by the laser range finder 43. And then starting the plasma cutting gun 42, rotating the hollow rotating platform 12 for a circle at a set speed, controlling the distance between the plasma cutting gun 42 and the pipe wall according to the cutting path, and stopping the hollow rotating platform 12, the sliding rail assembly 3 and the plasma cutting gun 42 after the pipe wall is cut. And finally, the hole opening device is moved upwards to the connecting box by controlling the lifting device, and then the subsequent process can be carried out. The utility model discloses an adopt the plasma cutting to carry out the pipeline trompil, compare with traditional section of thick bamboo sword trompil and improved trompil speed and work efficiency greatly, and can effectively reduce the whole weight and the use maintenance cost of tapping machine, show through practical application, adopt the plasma cutting to open a hole only need several minutes can accomplish. Through adopting laser range finder 43 to carry out the scanning of cutting path to make laser range finder 43 and plasma cutting rifle 42 equal to the perpendicular distance of cavity revolving stage 12 axis, utilize contained angle, difference in height and the rotational speed of cavity revolving stage 12 between them, make the distance of plasma cutting rifle 42 to the pipe wall keep in the working distance within range through controlling slide rail set spare 3 very easily, improved the convenience of control and the reliability of cutting. Through setting up appearance or infrared distance meter 44 of making a video recording, when the cutting of breaking down or not cutting off the pipe wall completely because of the error in the cutting trompil in-process, can seek the uncut position fast, fix a position this position with the plasma cutting rifle behind the definite position and cut once more and can realize the error correction purpose, improved the functional, reliability and the practicality of trompil device. When the camera is adopted, the uncut position can be found manually, and the plasma cutting gun is positioned; when the infrared distance measuring instrument is adopted, the distance between the infrared distance measuring instrument and the axis of the hollow rotary table 12 is equal to the vertical distance between the plasma cutting gun 42 and the axis, so that the distance measuring instrument can detect the distance along the cutting path by rotating the hollow rotary table, the distance detection value of the area after cutting is larger, the distance detection value of the area which is not cut or is not cut through is obviously smaller, and the uncut position and the area can be quickly determined by the difference. It should be noted that the scanning and cutting path means that the laser range finder rotates for one circle and detects and records the distance between the pipe walls; the connection of the adapter 41 and the slide rail assembly 3 means that the adapter 41 is connected with a sliding part of the slide rail assembly 3; in the tapping operation, the header 200 of the tapping machine is mounted on the welded pipe 400 through the gate valve 300, and the welded pipe 400 is welded to the pipe 500 to be tapped.

As an optimized solution, the present embodiment further provides a waste extraction assembly 5. The waste extraction assembly 5 comprises in particular a support tube 51, an electromagnet 52 and a switch support plate 53. The upper end of the support tube 51 is sequentially passed through the swing arm 21, the rotary table 13 and the hollow rotary table 12 and fixedly connected with the pan head support plate 11, the electromagnet 52 and the switch support plate 53 are installed at the lower end of the support tube 51 through elastic buffer members, and a plurality of proximity switches 54 distributed around the electromagnet 52 are installed on the switch support plate 53. Through setting up waste material extraction element 5 to make electro-magnet 52 and switch supporting disk 53 install on stay tube 51 through elastic buffer, strengthened the functional of trompil device, and move down the in-process at the trompil device and can effectively avoid electro-magnet 52 to be damaged by the pipe wall extrusion, improved fail safe nature. In practical applications, the support tube 51 is disposed coaxially with the hollow rotary table 12 and is in clearance fit with the swing arm 21, the rotary table 13 and the hollow rotary table 12 so as not to affect the rotation of the hollow rotary table 12 and to maintain the scrap picking assembly 5 in a stable state. By providing a plurality of proximity switches 54 around the electromagnet 52, the proximity switches 54 trigger a signal when moved down into position, improving control convenience and safety.

As a specific embodiment, the present invention makes the elastic buffer member adopt the following structure: including tube nut 55, sleeve 56, link 57, spring 58, and hex post 59. The pipe nut 55 is screwed to the lower end of the support pipe 51, the sleeve 56 penetrates through the bottom wall of the pipe nut 55, a first limit table 561 is arranged on the outer wall of the sleeve 56 and at the upper side of the bottom wall of the pipe nut 55, and a second limit table 562 is arranged on the upper half part of the inner wall of the sleeve 56. The connecting rod 57 is passed through the bushing 56, and a third limit land 571 in the bushing 56 is provided at a lower half of the connecting rod 57, a fourth limit land 572 is provided at a lower end of the connecting rod 57, and a fifth limit land 573 at an upper side of the bushing 56 is provided at an upper end of the connecting rod 57. The spring 58 is sleeved on the connecting rod 57, and the upper end and the lower end of the spring 58 are correspondingly pressed on the second limit table 562 and the third limit table 571. A hexagonal socket 59 is screwed into the lower end of the connecting rod 57 through a threaded hole in the upper end thereof. The electromagnet 52 is screwed on a threaded column integrated with a hexagonal column 59 through a threaded hole at the top of the electromagnet, and the switch support disc 53 is fixedly connected with the lower end of the sleeve 56. The elastic buffer part with the structure has the advantages of simple structure, convenience in disassembly and assembly, good buffering effect and strong adaptability. In the process of moving the hole forming device downwards, the electromagnet 52 can be prevented from being extruded and damaged by the pipe wall through the elastic buffer action of the spring 58, so that the safety and reliability are improved; and the sleeve 56 and the pipe nut 55 are lapped through the first limit table 561, so that the pipe wall can be effectively prevented from extruding and damaging the proximity switch 54, and the safety is enhanced. As an optimized scheme, in the present embodiment, the upper end of the sleeve 56 is provided with symmetrical limiting grooves, and the connecting rod 57 is provided with a limiting block 574 positioned in the limiting grooves. The electromagnet 52 and the switch supporting disc 53 can be prevented from rotating relatively through the matching of the limiting groove and the limiting block 574, and the stability of the structure is enhanced.

As a specific embodiment, the utility model discloses make slide rail set spare 3 adopt with structural style: comprises a base 31, a guide rail 32, a slide block 33, a motor 34, a lead screw 35 and a sliding table 36. The base 31 is fixed on the support plate 22, and an upper end plate 311 and a lower end plate 312 are fixed on the upper and lower ends of the base 31. The guide rail 32 is fixed to the base 31, and the slider 33 is fitted to the guide rail 32 so as to slide the same. The motor 34 is fixed between the upper end plate 311 and the swing arm 21. The lower end of the screw 35 is mounted on the lower end plate 312 via a bearing 37, and the upper end of the screw 35 is connected to the output shaft of the motor 34 via a coupling 38. The sliding table 36 is fixedly connected with the sliding block 33 and the adapter 41, and a nut 39 matched with the lead screw 35 is arranged in the sliding table 36. The slide rail assembly 3 with the structure has the advantages of convenience in assembly and stability in transmission, and in the process that the motor 34 drives the lead screw 35 to rotate, the sliding table 36, the sliding block 33 and the adapter 41 can slide up and down along the guide rail 32 through the matching of the nut 39 and the lead screw 35. It should be noted that, in practical applications, the base 31 is usually made of an aluminum profile to simplify the manufacturing process and reduce the weight, but the base 31 is not limited to this structure.

As an optimized solution, in the present embodiment, an axial photoelectric switch 314 is mounted on one side of the base 31 through a first fixing bar 313, and an axial blocking piece 361 that is engaged with the axial photoelectric switch 314 is disposed on the sliding table 36. Through the cooperation of the axial photoelectric switch 314 and the axial stopping piece 361, the plasma cutting gun 42 and the laser range finder 43 can be axially positioned so as to determine the axial initial position thereof, and the convenience and the accuracy of control are improved. It should be noted that, in practical application, the present invention further provides a radial photoelectric switch (not shown in the figure) and a radial blocking piece (not shown in the figure) which are matched with each other on the pan-tilt support plate 11 and the swing arm 21, so as to radially position the plasma cutting gun 42 and the laser range finder 43. In order to limit the up-down movement range of the slide rail assembly 3 so as to prevent the damage of the related components due to the over-limit of movement, the embodiment installs an upper limit switch 316 and a lower limit switch 317 on the other side of the base 31 through a second fixing bar 315, and sets a stop 362 on the sliding table 36, which cooperates with the upper limit switch 316 and the lower limit switch 317.

As a specific embodiment, the present invention makes the proximity switches 54 evenly set four along the circumference of the switch support plate 53 to improve the reliability of the trigger signal, but is not limited to four, and other numbers of proximity switches may be set according to specific needs. In order to enhance the safety and reliability, the embodiment further installs a redundant limit switch 510 on the switch support plate 53, which cooperates with the electromagnet 52, when the proximity switch fails or the downward movement action is not stopped due to a fault, the redundant limit switch 510 will contact with the electromagnet 52 and trigger a signal, and at this time, the safety protection purpose can be realized by forcibly stopping the lifting device.

It should be noted that, in practical application, the utility model discloses let the upper end of stay tube 51 run through cloud platform supporting disk 11 to set up a plurality of through wires holes on stay tube 51, so that walk the line. As a specific fixing mode, the utility model discloses adopt anchor clamps 421 and buckle 422 to fix plasma cutting rifle 42 on adapter 41 usually, and fix laser range finder 43 in one side of adapter 41 through the adapter plate, fix the opposite side at adapter 41 through the adapter plate with appearance of making a video recording or infrared ray range finder 44.

The above embodiments are only descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the claimed invention, and various modifications made by those skilled in the art according to the technical solutions of the present invention should fall within the scope of the present invention as defined by the claims.

Claims (10)

1. A high-reliability pipeline plasma hole forming device comprises a holder assembly (1), a swing arm assembly (2), a sliding rail assembly (3) and a cutting assembly (4), and is characterized in that the holder assembly (1) comprises a holder supporting disk (11) and a hollow rotating platform (12) fixed on the holder supporting disk (11), the rotating disk of the hollow rotating platform (12) is coaxially fixed with a hollow rotating platform (13), the swing arm assembly (2) comprises a swing arm (21) and a support plate (22), the swing arm (21) is horizontally fixed on the rotating platform (13), the support plate (22) is vertically fixed on the swing arm (21), the sliding rail assembly (3) is vertically installed on the support plate (22), the cutting assembly (4) comprises a switching seat (41) connected with the sliding rail assembly (3), and a plasma cutting gun (42) is fixed in the middle of the switching seat (41), one side of the plasma cutting gun (42) is provided with a laser range finder (43), the other side of the plasma cutting gun (42) is provided with a camera or an infrared range finder (44), and the vertical distances from the plasma cutting gun (42) and the laser range finder (43) to the axis of the hollow rotating platform (12) are equal.

2. The highly reliable pipe plasma tapping device as claimed in claim 1, further comprising a waste extraction assembly (5), wherein the waste extraction assembly (5) comprises a support pipe (51), an electromagnet (52) and a switch support plate (53), the upper end of the support pipe (51) passes through the swing arm (21), the turntable (13) and the hollow turntable (12) and is fixedly connected with the tripod head support plate (11), the electromagnet (52) and the switch support plate (53) are mounted at the lower end of the support pipe (51) through elastic buffering members, and a plurality of proximity switches (54) distributed around the electromagnet (52) are mounted on the switch support plate (53).

3. The high-reliability pipe plasma tapping device as claimed in claim 2, wherein the elastic buffer member comprises a pipe nut (55), a sleeve (56), a connecting rod (57), a spring (58) and a hexagonal cylinder (59), the pipe nut (55) is screwed on the lower end of the support pipe (51), the sleeve (56) penetrates through the bottom wall of the pipe nut (55), the outer wall of the sleeve (56) is provided with a first limit platform (561) at the upper side of the bottom wall of the pipe nut (55), the upper half part of the inner wall of the sleeve (56) is provided with a second limit platform (562), the connecting rod (57) penetrates through the sleeve (56), the lower half part of the connecting rod (57) is provided with a third limit platform (571) in the sleeve (56), the lower end of the connecting rod (57) is provided with a fourth limit platform (572), the upper end of the connecting rod (57) is provided with a fifth limit platform (573) at the upper side of the sleeve (56), the spring (58) is sleeved on the connecting rod (57), the upper end and the lower end of the spring (58) correspondingly push against the second limiting table (562) and the third limiting table (571), and the upper end of the hexagonal column (59) is screwed at the lower end of the connecting rod (57) through a threaded hole; the top of the electromagnet (52) is screwed on a threaded column integrated with a hexagonal column (59) through a threaded hole, and the switch supporting disc (53) is fixedly connected with the lower end of the sleeve (56).

4. The high-reliability pipe plasma tapping device according to claim 3, wherein the upper end of the sleeve (56) is provided with symmetrical limiting grooves, and the connecting rod (57) is provided with limiting blocks (574) positioned in the limiting grooves.

5. The high-reliability pipeline plasma tapping device according to claim 4, wherein the slide rail assembly (3) comprises a base (31), a guide rail (32), a sliding block (33), a motor (34), a lead screw (35) and a sliding table (36), the base (31) is fixed on the support plate (22), an upper end plate (311) and a lower end plate (312) are correspondingly fixed on the upper end and the lower end of the base (31), the guide rail (32) is fixed on the base (31), the sliding block (33) is clamped on the guide rail (32) and enables the guide rail and the guide rail to be in sliding fit, the motor (34) is fixed between the upper end plate (311) and the swing arm (21), the lower end of the lead screw (35) is installed on the lower end plate (312) through a bearing (37), the upper end of the lead screw (35) is connected with an output shaft of the motor (34) through a coupler (38), and the sliding table (36) is respectively fixedly connected with the sliding block (33) and the adapter (41), a nut (39) matched with the screw rod (35) is arranged in the sliding table (36).

6. The high-reliability pipe plasma tapping device according to claim 5, wherein an axial photoelectric switch (314) is mounted on one side of the base (31) through a first fixing bar (313), and an axial blocking piece (361) matched with the axial photoelectric switch (314) is fixed on the sliding table (36).

7. The highly reliable pipe plasma tapping device as claimed in claim 6, wherein the other side of said base (31) is mounted with an upper limit switch (316) and a lower limit switch (317) by means of a second fixing bar (315), and said slide table (36) is fixed with a stopper (362) cooperating with the upper limit switch (316) and the lower limit switch (317).

8. The highly reliable pipe plasma tapping device as claimed in claim 7, wherein said proximity switches (54) are uniformly arranged in four along the circumference of the switch support plate (53), and a redundant limit switch (510) cooperating with the electromagnet (52) is further mounted on the switch support plate (53).

9. The plasma tapping device for the pipe with high reliability as claimed in claim 7, wherein the upper end of the supporting pipe (51) penetrates through the holder supporting plate (11), and the supporting pipe (51) is provided with a plurality of threading holes.

10. The high-reliability pipe plasma tapping device according to claim 7, wherein the plasma cutting gun (42) is fixed on the adapter (41) through a clamp (421) and a buckle (422), the laser range finder (43) is fixed on one side of the adapter (41) through an adapter plate, and the camera or the infrared range finder (44) is fixed on the other side of the adapter (41) through an adapter plate.

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