Three-way pipeline cutting device and cutting method

Abstract

The invention relates to the technical field of pipeline cutting equipment, in particular to a three-way pipeline cutting device and method.The three-way pipeline cutting device comprises a machining table, an auxiliary supporting assembly is movably installed on the left side of the top end of the machining table, and a frame set is installed on the right side of the top end of the machining table and comprises a base fixedly connected with the surface of the machining table; an annular cylinder is connected to the top end of the base, a movable assembly is movably installed on the surface of the annular cylinder and comprises a movable block, and a thermal cutting assembly is installed at the top end of the movable block. According to the plasma thermal cutting device, a pipeline is inserted into a ring cylinder, a driving motor serves as a power source, a gear rolls on the surface of a gear ring, then a movable block moves on the surface of the ring cylinder, a plasma thermal cutting head can cut the pipeline, the smoothness of the cutting face of the pipeline is guaranteed, meanwhile, a clamping plate can be pushed through stretching and retracting of the piston end of an air cylinder, and the clamping effect is improved. And then the clamping plate drives the first wheel roller to abut against the surface of the pipeline for fixing, and the stability of the pipeline in the suspension cutting process can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline cutting equipment, and in particular to a three-way pipeline cutting device and a cutting method. Background Art

[0002] A tee is a joint with three openings. It is widely used in pipe networks for transporting liquids and gases. The production of tee pipes is generally carried out by casting or welding. Cast iron or cast steel tee pipes are generally produced by casting. The dimensional accuracy of cast tee pipes is relatively poor and they need to be machined later.

[0003] Tee pipes made of metal materials such as stainless steel are generally produced by welding. First, the steel pipe is cut by a cutting device to cut out the connection ports on the main pipe and the branch pipe, and then the cut main pipe and branch pipe are assembled into a tee pipe by welding. The tee pipe produced by welding does not require complicated post-processing, so the production efficiency is relatively high.

[0004] The existing three-way pipe production is generally cut by plasma cutting machine. When cutting the steel pipe by plasma cutting machine, one end of the steel pipe is generally fixed by a clamp, and the suspended end of the steel pipe is cut by plasma cutting machine. This cutting method is suitable for cutting small diameter and thin-walled steel pipes. For the cutting of thick-walled and large-diameter steel pipes, the suspended cutting method is easy to cause one side of the pipe to fall due to the heavy weight of the steel pipe, and it is difficult to ensure the flatness of the cutting surface, resulting in reduced cutting accuracy, affecting the subsequent assembly and welding of the three-way pipe. Therefore, a three-way pipe cutting device and cutting method are needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the problems raised in the above background technology.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A three-way pipe cutting device and a cutting method, comprising a processing table, an auxiliary support component movably installed on the left side of the top of the processing table, a frame group installed on the right side of the top of the processing table, the frame group comprising a base connected and fixed to the surface of the processing table, a ring cylinder connected to the top of the base, and a movable component movably installed on the surface of the ring cylinder, the movable component comprising a movable block, a thermal cutting component installed on the top of the movable block, two fixed components symmetrically installed on the right side of the ring cylinder, the ring cylinder can be supported by the base so that the ring cylinder can adapt to the suspension of the pipe to avoid the pipe falling.

[0007] Preferably, a limiting ring is embedded in the ring groove on the left side of the ring cylinder, and a hanging plate is connected to the outside of the limiting ring. The hanging plate is connected and fixed to the side of the movable block by bolts. The limiting ring can be limited by the ring groove of the ring cylinder, and the limiting ring is fixed to the surface of the movable block by the hanging plate, which facilitates the movable block to be movably installed on the outside of the ring cylinder to avoid the movable block from falling off during the activity.

[0008] Preferably, the right side of the movable block is connected to a support plate by bolts, and a driving motor is supported and installed on the support plate, a gear is connected to the shaft end of the driving motor, a through groove is opened on the surface of the support plate, the surface of the gear is meshed with a gear ring through teeth, and the gear ring is connected and fixed to the side of the ring cylinder, and the gear is driven to rotate by the shaft end of the driving motor, so that the gear can be controlled to move on the surface of the gear ring under the cooperation of the teeth, and then the movable block can be controlled to make a circular motion on the surface of the ring cylinder, thereby achieving the effect of circular cutting of the pipeline by the plasma thermal cutting head.

[0009] Preferably, the bottom end of the movable block is designed with an arc-shaped structure, and four guide wheels are installed at the bottom end of the movable block. The guide wheels are embedded in the surface of the ring cylinder through guide grooves. The movable block can drive the guide wheels to move in the guide grooves on the surface of the ring cylinder to ensure the smoothness of the movement of the movable block.

[0010] Preferably, the thermal cutting assembly includes a column connected and fixed to the top of the movable block, an inserted shaft is inserted into the top of the column, and a fixed block is connected to the top of the inserted shaft, the fixed block is fixed to the surface of the beam, a locking bolt is inserted into the outer side of the top of the column through a threaded hole, and the locking bolt is inserted into the inner part of the inserted shaft through a through hole, and the inserted shaft moves in the column to change the height of the beam and adjust the distance between the plasma thermal cutting head and the outer side of the pipe, thereby facilitating thermal cutting operations on the pipe.

[0011] Preferably, two shaft sleeves are installed on the outer side of the beam rod, and the two shaft sleeves are connected and fixed by a connecting rod. A plasma thermal cutting head is installed on the side of the shaft sleeve, and a fixing bolt is inserted through a threaded hole on the top of the shaft sleeve. The thermal cutting position of the plasma thermal cutting head can be fine-tuned by moving the shaft sleeve on the surface of the beam rod. The two shaft sleeves are connected by a connecting rod to ensure the synchronous movement of the two shaft sleeves.

[0012] Preferably, the fixing assembly includes a beam plate, which is connected and fixed to the side of the ring cylinder, a support plate is connected to the right side of the beam plate, and a cylinder is installed on the outer side of the support plate, the piston end of the cylinder passes through the support plate and is connected to a clamping plate, and a first roller is installed on the inner wall of the clamping plate through a groove, the clamping plate is pushed by the extension and contraction of the piston end of the cylinder, and the spacing between the two clamping plates is changed and adjusted, and the pipeline can be clamped by the two clamping plates, so that the first roller can be supported on the outside of the pipeline, which is convenient for clamping and fixing the pipeline.

[0013] Preferably, the auxiliary support assembly includes a slider, which is embedded in the processing table through a guide groove, and the slider is threadedly sleeved on the surface of the threaded shaft, and one end of the threaded shaft is rotatably installed on the inner wall of the processing table guide groove, the top of the threaded shaft is connected to a shaft column, and an inner plug plate is inserted into the top of the shaft column through a through groove, and a fixed plug shaft is inserted into the side of the top of the shaft column through a threaded hole, and an auxiliary support frame is connected to the top of the inner plug plate, and a plurality of second rollers are rotatably installed on the top of the auxiliary support frame, and the cooperation of the auxiliary support frame and the second rollers can be used to auxiliary support the pipeline to ensure the stability of the suspension of the end of the pipeline and prevent one side of the pipeline from falling, and the auxiliary support frame can be pushed and moved by moving the inner plug plate in the shaft column, and then the suspension height of the auxiliary support frame to the pipeline is adapted.

[0014] A three-way pipe cutting method, characterized in that it comprises the following steps: S1, inserting and placing the three-way pipe in the ring tube, clamping and fixing the pipe by a fixing component, so that the three-way pipe is in a suspended state; S2, by rotating the threaded shaft, the control slider moves in the guide groove of the processing table, and the position of the auxiliary support frame is changed to make the auxiliary support frame adapt to the length of the three-way pipe; S3, the inner plug plate moves in the shaft column, so that the auxiliary support frame moves to support the bottom end of the pipeline; S4, by moving the interpolated shaft in the column, changes the distance between the plasma thermal cutting head and the tee pipe; S5, after the driving motor is started, it drives the gear to rotate. After the gear and the gear ring cooperate, the movable block is controlled to move in a circular path on the surface of the ring tube. After the plasma thermal cutting head is started, the outer side of the pipeline can be circularly thermally cut.

[0015] The present invention has at least the following beneficial effects: 1. By setting up a frame group, a movable component, a thermal cutting component and a fixed component, the circumferential cutting of the pipeline is realized. The device inserts the pipeline into the ring tube, uses a driving motor as a power source, makes the gear roll on the surface of the gear ring, and then makes the movable block move on the surface of the ring tube, so that the plasma thermal cutting head can cut the pipeline to ensure the flatness of the pipeline cutting surface. At the same time, the clamping plate can be pushed by the extension and contraction of the piston end of the cylinder, and then the clamping plate drives the first roller to contact and fix on the surface of the pipeline, which can ensure the stability of the pipeline during suspended cutting.

[0016] 2. By setting up an auxiliary support component, the stability of the pipeline suspension is improved. The device moves inside the shaft column through the inner plug plate, so that the shaft end of the fixed plug shaft is moved and inserted into the positioning groove of the inner plug plate. The height of the auxiliary support frame is adjusted to change the height of the auxiliary support frame, so that the second roller supports pipelines of different diameters, thereby providing auxiliary support for the pipeline. At the same time, the slider can be controlled to move on the surface of the threaded shaft through the threaded shaft knob, so as to adjust the support position of the second roller, so that the second roller can perform auxiliary support operations on pipelines of different lengths, further improving the stability of the pipeline suspension and preventing one end of the pipeline from falling.

[0017] 3. By setting up the thermal cutting component, the distance between the plasma thermal cutting head and the pipe can be adjusted. The device moves in the column through the inserted shaft, which can adjust the height of the beam and change the distance between the plasma thermal cutting head and the pipe, so that the plasma thermal cutting head can cut pipes of various thicknesses. The inclination angle and position of the plasma thermal cutting head can be changed by rotating or moving the shaft sleeve on the surface of the beam, and it can be locked and fixed by fixing bolts, thereby improving the cutting accuracy of the plasma thermal cutting head on the pipe to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the external structure of a three-way pipe cutting device and a cutting method proposed by the present invention; Figure 2 It is a three-dimensional disassembled structural schematic diagram of an auxiliary support assembly in a three-way pipe cutting device and a cutting method proposed by the present invention; Figure 3 A three-dimensional disassembly structure schematic diagram of a frame assembly in a three-way pipe cutting device and a cutting method proposed by the present invention; Figure 4 It is a three-dimensional disassembled structural schematic diagram of a movable component in a three-way pipe cutting device and a cutting method proposed by the present invention; Figure 5 A schematic diagram of the three-dimensional disassembly structure of a movable component and a thermal cutting component in a three-way pipe cutting device and a cutting method proposed by the present invention; Figure 6 It is a schematic diagram of the partial disassembly structure of a thermal cutting component in a three-way pipe cutting device and cutting method proposed by the present invention; Figure 7The present invention provides a schematic diagram of the internal disassembly structure of a fixed component in a three-way pipe cutting device and a cutting method.

[0020] In the figure: 1. processing table; 2. frame group; 21. base; 22. ring cylinder; 23. limit ring; 24. hanging plate; 3. movable assembly; 31. movable block; 32. guide wheel; 33. gear; 34. drive motor; 35. support plate; 36. gear ring; 4. thermal cutting assembly; 41. column; 42. inserted shaft; 43. fixed block; 44. locking bolt; 45. beam; 46. bushing; 47. fixing bolt; 48. plasma thermal cutting head; 49. connecting rod; 5. fixing assembly; 51. beam plate; 52. support plate; 53. cylinder; 54. clamping plate; 55. first roller; 6. auxiliary support assembly; 61. slider; 62. threaded rotary shaft; 63. shaft column; 64. fixed inserted shaft; 65. inner plug plate; 66. auxiliary support frame; 67. second roller. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Reference Figure 1-7 A three-way pipe cutting device includes a processing table 1, an auxiliary support component 6 is movably installed on the left side of the top of the processing table 1, a frame group 2 is installed on the right side of the top of the processing table 1, the frame group 2 includes a base 21 connected and fixed to the surface of the processing table 1, a ring cylinder 22 is connected to the top of the base 21, and a movable component 3 is movably installed on the surface of the ring cylinder 22, the movable component 3 includes a movable block 31, a thermal cutting component 4 is installed on the top of the movable block 31, and two fixed components 5 are symmetrically installed on the right side of the ring cylinder 22.

[0023] A limit ring 23 is embedded in the ring groove on the left side of the ring cylinder 22 , and a hanging plate 24 is connected to the outer side of the limit ring 23 . The hanging plate 24 is connected and fixed to the side of the movable block 31 by bolts.

[0024] The right side of the movable block 31 is connected to a support plate 35 by bolts, and a driving motor 34 is supported and installed on the support plate 35. The shaft end of the driving motor 34 is connected to a gear 33. A through groove is opened on the surface of the support plate 35. A gear ring 36 is meshed with teeth on the surface of the gear 33, and the gear ring 36 is connected and fixed to the side of the ring tube 22.

[0025] The bottom end of the movable block 31 is designed in an arc-shaped structure. Four guide wheels 32 are installed at the bottom end of the movable block 31, and the guide wheels 32 are embedded in the surface of the ring cylinder 22 through guide grooves.

[0026] The thermal cutting assembly 4 includes a column 41 connected and fixed to the top of the movable block 31, an inserted shaft 42 is inserted into the top of the column 41, and a fixed block 43 is connected to the top of the inserted shaft 42, the fixed block 43 is fixed to the surface of the beam 45, a locking bolt 44 is inserted into the outer side of the top of the column 41 through a threaded hole, and the locking bolt 44 is inserted into the inside of the inserted shaft 42 through a through hole.

[0027] Two shaft sleeves 46 are sleeved and installed on the outer side of the beam 45. The two shaft sleeves 46 are connected and fixed by a connecting rod 49. A plasma thermal cutting head 48 is installed on the side of the shaft sleeve 46. A fixing bolt 47 is inserted into the top of the shaft sleeve 46 through a threaded hole.

[0028] The fixing assembly 5 includes a beam plate 51, which is connected and fixed to the side of the ring tube 22. A support plate 52 is connected to the right side of the beam plate 51, and a cylinder 53 is installed on the outer side of the support plate 52. The piston end of the cylinder 53 passes through the support plate 52 and is connected to a clamping plate 54, and a first roller 55 is installed on the inner wall of the clamping plate 54 through a groove.

[0029] The auxiliary support assembly 6 includes a slider 61, which is embedded in the inside of the processing table 1 through a guide groove. The slider 61 is threadedly sleeved on the surface of a threaded shaft 62. One end of the threaded shaft 62 is rotatably mounted on the inner wall of the guide groove of the processing table 1. The top of the threaded shaft 62 is connected to a shaft column 63, and an inner insert plate 65 is inserted into the top of the shaft column 63 through a through groove. A fixed insert shaft 64 is inserted into the side of the top of the shaft column 63 through a threaded hole. The top of the inner insert plate 65 is connected to an auxiliary support frame 66, and a plurality of second rollers 67 are rotatably mounted on the top of the auxiliary support frame 66.

[0030] A three-way pipe cutting method comprises the following steps: S1, insert the three-way pipe into the ring tube 22, clamp and fix the pipe by the fixing assembly 5, so that the three-way pipe is in a suspended state; S2, by rotating the threaded shaft 62, the slider 61 is controlled to move in the guide groove of the processing table 1, and the position of the auxiliary support frame 66 is changed and adjusted so that the auxiliary support frame 66 is adapted to the length of the three-way pipe; S3, the inner insert plate 65 moves in the shaft column 63, so that the auxiliary support frame 66 moves to support the bottom end of the pipeline; S4, the distance between the plasma thermal cutting head 48 and the three-way pipe is changed by moving the inner plug shaft 42 in the column 41; S5, after the driving motor 34 is started, it drives the gear 33 to rotate. After the gear 33 cooperates with the gear ring 36, the movable block 31 is controlled to move in a circular path on the surface of the ring tube 22. After the plasma thermal cutting head 48 is started, an annular thermal cutting can be performed on the outer side of the pipeline.

[0031] The base 21 can support the annular cylinder 22 so that the annular cylinder 22 can adapt to the suspension of the pipeline to avoid the pipeline falling. The movable block 31 can move on the surface of the annular cylinder 22, which can facilitate the plasma thermal cutting head 48 to perform annular thermal cutting operations. The limiting ring 23 can be limited by the annular groove of the annular cylinder 22. The limiting ring 23 is fixed to the surface of the movable block 31 through the hanging plate 24, which is convenient for movably installing the movable block 31 on the outside of the annular cylinder 22 to avoid the movable block 31 from falling off during the activity. The hanging plate 24 and the movable block 31 are connected by bolts, which can facilitate the replacement of spare parts after the movable block 31 is disassembled in the future.

[0032] By driving the gear 33 to rotate through the shaft end of the driving motor 34, the gear 33 can be controlled to move on the surface of the gear ring 36 under the cooperation of the teeth, and then the movable block 31 can be controlled to make a circular motion on the surface of the ring cylinder 22, thereby achieving the effect of the plasma thermal cutting head 48 performing circular cutting on the pipeline. At the same time, the through groove design of the support plate 35 can facilitate the gear 33 to pass through the support plate 35 and engage with the gear ring 36. When the movable block 31 moves on the surface of the ring cylinder 22, the movable block 31 can drive the guide wheel 32 to move in the guide groove on the surface of the ring cylinder 22, thereby ensuring the smoothness of the movement of the movable block 31, avoiding the occurrence of jamming, and ensuring the convenience of the movement of the movable block 31. By moving the inner plug shaft 42 in the column 41, the height of the adjustment beam 45 can be changed, and the distance between the plasma thermal cutting head 48 and the outside of the pipeline can be adjusted, so as to facilitate the thermal cutting operation of the pipeline.

[0033] When the inserted shaft 42 is adjusted, the locking bolt 44 can be moved in the threaded hole of the column 41 and then inserted into the through hole of the inserted shaft 42 for locking and fixing. It can be freely manually adapted and adjusted. The sleeve 46 can be moved on the surface of the beam 45 to fine-tune the thermal cutting position of the plasma thermal cutting head 48. The two sleeves 46 are connected by a connecting rod 49 to ensure the synchronous movement of the two sleeves 46. When the sleeve 46 is adjusted, the shaft end of the fixing bolt 47 can be moved in the threaded hole of the sleeve 46 and then abutted against the surface of the beam 45 to fix it, thereby ensuring the stability of the adjusted plasma thermal cutting head 48.

[0034] When the pipe is placed between the two clamping plates 54, the clamping plates 54 can be pushed by the piston end of the cylinder 53 to change and adjust the distance between the two clamping plates 54. The two clamping plates 54 can clamp the pipe, so that the first roller 55 can be supported against the outside of the pipe, which is convenient for clamping and fixing the pipe. At the same time, the design of the first roller 55 can facilitate the stable rotation operation of the clamping plate 54 after the clamping is loosened, which is conducive to the pipe ring cutting. The auxiliary support frame 66 and the second roller 67 can be used to assist in supporting the pipe. To ensure the stability of the suspension at the end of the pipeline and prevent one side of the pipeline from falling, the inner plug-in plate 65 moves in the shaft column 63 to push the auxiliary support frame 66, and then adapt the auxiliary support frame 66 to the suspension height of the pipeline. The shaft end of the fixed plug-in shaft 64 moves in the threaded hole of the shaft column 63 and is inserted into the through hole of the inner plug-in plate 65 for fixation. At the same time, the threaded rotating shaft 62 can be rotated to move the slider 61 in the guide groove of the processing table 1, and the position of the auxiliary support frame 66 can be changed and adjusted to make the auxiliary support frame 66 adapt to the support operation of pipelines of different lengths.

[0035] Working principle: According to the attached Figure 4 With attached Figure 7 As shown, during use, the three-way pipe can be inserted into the ring tube 22, and the two cylinders 53 are started to move the piston end of the cylinder 53 to push the clamping plate 54, and the clamping plate 54 can push the first roller 55 to contact the outside of the pipe, and then suspend and clamp the pipe. The position of the beam 45 can be changed by moving the inner plug shaft 42 in the column 41. After completion, it can be locked and fixed by the locking bolt 44. At this time, the distance between the plasma thermal cutting head 48 and the pipe is adjusted, and the position of the plasma thermal cutting head 48 can be adjusted by the displacement of the shaft sleeve 46 on the surface of the beam 45, and it can be locked and fixed by the fixing bolt 47; Secondly, according to the attached Figure 2 As shown, after the three-way pipe is suspended and fixed by the fixing assembly 5, the inner insert plate 65 can be pulled and pulled, so that the inner insert plate 65 moves in the shaft column 63 and pushes the auxiliary support frame 66. The auxiliary support frame 66 is forced to push the second roller 67 to move, and then the bottom end of the pipe is auxiliary supported by the second roller 67. When the pipe is short, the threaded shaft 62 can be rotated so that the threaded shaft 62 controls the slider 61 to move in the guide groove of the processing table 1. The movement of the slider 61 can drive the shaft column 63 to move. The shaft column 63 cooperates with the inner insert plate 65 to drive the auxiliary support frame 66 to move, thereby performing an anti-fall auxiliary support operation near the pipe cutting position; Finally, according to the attached Figure 4 With attached Figure 5As shown, the drive motor 34 is started, and the shaft end of the drive motor 34 can drive the gear 33 to rotate, and the gear 33 can move around the outside of the gear ring 36. The drive motor 34 drives the movable block 31 to move during the movement, so that the movable block 31 drives the guide wheel 32 to roll in the guide groove on the surface of the ring tube 22. At this time, the plasma thermal cutting head 48 can perform plasma thermal cutting on the pipeline. When the remaining area of ​​the pipeline cutting is small, the pipeline can be rotated for fracture cutting operation.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A three-way pipe cutting device, comprising a processing table (1), characterized in that: An auxiliary support component (6) is movably mounted on the left side of the top of the processing table (1); a frame group (2) is mounted on the right side of the top of the processing table (1); the frame group (2) comprises a base (21) connected and fixed to the surface of the processing table (1); a ring cylinder (22) is connected to the top of the base (21); a movable component (3) is movably mounted on the surface of the ring cylinder (22); the movable component (3) comprises a movable block (31); a thermal cutting component (4) is mounted on the top of the movable block (31); and two fixed components (5) are symmetrically mounted on the right side of the ring cylinder (22).

2. A three-way pipe cutting device according to claim 1, characterized in that: A limit ring (23) is embedded in the ring groove on the left side of the ring cylinder (22), and a hanging plate (24) is connected to the outside of the limit ring (23). The hanging plate (24) is connected and fixed to the side of the movable block (31) by bolts.

3. A three-way pipe cutting device according to claim 2, characterized in that: The right side of the movable block (31) is butt-jointed with a support plate (35) by means of bolts, and a driving motor (34) is supported and mounted on the support plate (35), a gear (33) is connected to the shaft end of the driving motor (34), a through groove is provided on the surface of the support plate (35), a gear ring (36) is meshed with teeth on the surface of the gear (33), and the gear ring (36) is connected and fixed to the side of the ring tube (22).

4. A three-way pipe cutting device according to claim 3, characterized in that: The bottom end of the movable block (31) is designed to be an arc-shaped structure. Four guide wheels (32) are installed at the bottom end of the movable block (31), and the guide wheels (32) are embedded in the surface of the ring cylinder (22) through guide grooves.

5. A three-way pipe cutting device according to claim 1, characterized in that: The thermal cutting assembly (4) comprises a column (41) connected and fixed to the top of the movable block (31); an inserted shaft (42) is inserted into the top of the column (41); and a fixed block (43) is connected to the top of the inserted shaft (42); the fixed block (43) is fixed to the surface of the beam (45); a locking bolt (44) is inserted into the outer side of the top of the column (41) through a threaded hole, and the locking bolt (44) is inserted into the inside of the inserted shaft (42) through a through hole.

6. A three-way pipe cutting device according to claim 5, characterized in that: Two shaft sleeves (46) are sleeved and installed on the outer side of the beam (45); the two shaft sleeves (46) are connected and fixed via a connecting rod (49); a plasma thermal cutting head (48) is installed on the side of the shaft sleeve (46); and a fixing bolt (47) is inserted through a threaded hole at the top of the shaft sleeve (46).

7. A three-way pipe cutting device according to claim 1, characterized in that: The fixing assembly (5) comprises a beam plate (51), the beam plate (51) being connected and fixed to the side of the ring tube (22), a support plate (52) being connected to the right side of the beam plate (51), and a cylinder (53) being installed on the outside of the support plate (52), a piston end of the cylinder (53) passing through the support plate (52) and then connected to a clamping plate (54), and a first roller (55) being installed on the inner wall of the clamping plate (54) via a groove.

8. The three-way pipe cutting device according to claim 1, characterized in that: The auxiliary support component (6) comprises a slider (61), the slider (61) is embedded in the processing table (1) through a guide groove, the slider (61) is threadedly sleeved on the surface of a threaded rotating shaft (62), one end of the threaded rotating shaft (62) is rotatably mounted on the inner wall of the guide groove of the processing table (1), the top end of the threaded rotating shaft (62) is connected to a shaft column (63), and an inner plug-in plate (65) is inserted into the top end of the shaft column (63) through a through groove, a fixed plug-in shaft (64) is inserted into the side of the top end of the shaft column (63) through a threaded hole, the top end of the inner plug-in plate (65) is connected to an auxiliary support frame (66), and a plurality of second rollers (67) are rotatably mounted on the top end of the auxiliary support frame (66).

9. A three-way pipe cutting method according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, inserting a three-way pipe into the annular tube (22), clamping and fixing the pipe by a fixing assembly (5), so that the three-way pipe is in a suspended state; S2, by rotating the threaded rotating shaft (62), the control slide block (61) moves in the guide groove of the processing table (1), and the position of the auxiliary support frame (66) is changed and adjusted so that the auxiliary support frame (66) is adapted to the length of the three-way pipe; S3, the inner insert plate (65) moves inside the shaft column (63), so that the auxiliary support frame (66) moves to support the bottom end of the pipeline; S4, changing the distance between the plasma thermal cutting head (48) and the three-way pipe by moving the interpolated shaft (42) in the column (41); S5, the driving motor (34) is started to drive the gear (33) to rotate, and the gear (33) cooperates with the gear ring (36) to control the movable block (31) to move in a circular path on the surface of the ring tube (22), and the plasma thermal cutting head (48) is started to perform annular thermal cutting on the outer side of the pipeline.

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