Heavy-duty pneumatic auxiliary equipment for tube lathes
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JIANGAO CNC MACHINE TOOLS
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-03
Smart Images
Figure CN224444787U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machinery, and in particular to oil drill pipe repair equipment, specifically to a heavy-duty pneumatic auxiliary machine for a pipe lathe. Background Technology
[0002] During oil drilling, drill pipes are connected one by one using internal and external tapered threads. Due to the high stress and temperature experienced during drilling, coupled with the scouring and friction from high-pressure drilling mud, the drill pipe shoulder and thread profile are easily deformed, worn, or locally damaged, rendering the entire drill pipe unusable. Current technology utilizes the characteristics of tapered threads to mechanically repair the thread profile, allowing the drill pipe to be reused multiple times.
[0003] In the traditional drill pipe repair process, loading and unloading work mostly relies on manual operation. Furthermore, hoisting equipment is required to lift the oil drill pipe during loading and unloading. The entire process is not only complex and inefficient, but also poses safety hazards. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a heavy-duty pneumatic auxiliary machine for a pipe lathe, which overcomes the deficiencies of existing technologies, is easy to operate, and can automatically realize the rapid loading and unloading of oil drill pipes, thereby improving the repair efficiency and safety of oil drill pipes.
[0005] To achieve the above objectives, this utility model provides the following technical solution:
[0006] A heavy-duty pneumatic auxiliary machine for a tube lathe includes a frame, on which are mounted several sets of left-side flipping mechanisms, several sets of right-side flipping mechanisms, and several sets of conveyor wheel mechanisms.
[0007] The left flip-plate mechanism includes a left lifting mechanism and a left flip-plate. The left lifting mechanism is installed on the left side of the frame, and its lifting drive end is connected to the lower surface of the left flip-plate for driving the left flip-plate to move up and down. A first guide slope is provided on the upper surface of the left flip-plate. The right flip-plate mechanism includes a right lifting mechanism and a right flip-plate. The right lifting mechanism is installed on the right side of the frame, and its lifting drive end is connected to the lower surface of the right flip-plate for driving the right flip-plate to move up and down. A second guide slope is provided on the upper surface of the right flip-plate.
[0008] The conveying wheel mechanism includes a first support frame, a second support frame, and a drive mechanism. Both the first and second support frames are fixedly mounted on a frame. A first hinge shaft is rotatably connected to the top of the first support frame via a bearing seat. Two first rocker arms and a first rocker arm are fixedly connected to the outer surface of the first hinge shaft. A first rotary motor is fixedly mounted on the outside of one of the first rocker arms. The drive shaft of the first rotary motor passes through the two first rocker arms sequentially and is connected to the two first rocker arms via bearings. A first roller is disposed between the two first rocker arms. The first roller is fixedly mounted on the outer surface of the drive shaft of the first rotary motor, and the outer surface of the first roller is surrounded by a first V-groove. A second hinge shaft is rotatably connected to the top of the second support frame via a bearing seat. Two second rocker arms and one second rocker arm are fixedly connected to the outer surface of the two hinge shafts. A second rotary motor is fixedly mounted on the outside of one of the second rocker arms. The drive shaft of the second rotary motor passes through the two second rocker arms in sequence and is connected to the two second rocker arms through bearings. A second roller is provided between the two second rocker arms. The second roller is fixedly mounted on the outer surface of the drive shaft of the second rotary motor. A second V-groove is surrounded on the outer surface of the second roller. The second V-groove is directly opposite the first V-groove. The lower end of the first rocker arm is connected to one end of the transmission rod through a pin. The lower end of the second rocker arm is connected to the other end of the transmission rod through a pin. The drive end of the drive mechanism is connected to the first hinge shaft or the second hinge shaft and is used to drive the first hinge shaft or the second hinge shaft to rotate.
[0009] The bottom end of the first guide slope is located on the left side of the first roller and / or the second roller, and the bottom end of the second guide slope corresponds to the front and back of the opening of the first V-groove and / or the second V-groove.
[0010] Preferably, the left lifting mechanism includes two left supports and a left lifting cylinder. A left linear guide rail is fixedly installed on the inner side of each left support. The upper part of the left lifting cylinder is connected to the lower end of the left telescopic rod via a telescopic shaft. A left pin support is installed on the lower surface of the left flap, and the upper end of the left telescopic rod is connected to the left pin support via a pin. Left guide rail supports are vertically installed on both sides of the lower surface of the left flap, and left guide rail sliders are installed on the outer sides of each left guide rail support. The two left guide rail supports respectively form sliding pairs with the two left linear guide rails via left guide rail sliders.
[0011] Preferably, the right lifting mechanism includes two right supports and a right lifting cylinder. A right linear guide rail is fixedly installed on the inner side of each right support. The upper part of the right lifting cylinder is connected to the lower end of the right telescopic rod via a telescopic shaft. A right pin support is installed on the lower surface of the right flap, and the upper end of the right telescopic rod is connected to the right pin support via a pin. Right guide rail supports are vertically installed on both sides of the lower surface of the right flap, and right guide rail sliders are installed on the outer side of each right guide rail support. The two right guide rail supports respectively form sliding pairs with the two right linear guide rails via right guide rail sliders.
[0012] Preferably, the driving mechanism includes a telescopic cylinder, one end of which is hinged to the frame via a rotating shaft seat, the other end of which is connected to one end of a drive rod via a telescopic shaft, the other end of which is connected to one end of a connecting rod via a pin, and the other end of which is fixedly sleeved on the outer surface of a first hinge shaft or a second hinge shaft.
[0013] This utility model provides a heavy-duty pneumatic auxiliary machine for a pipe lathe. It has the following advantages: By controlling the lifting drive end of the right lifting mechanism to move the right flap upwards, the oil drill pipe to be repaired can slide into the second guide ramp on the right flap, thus achieving material handling. Then, by controlling the lifting drive end of the right lifting mechanism to move the right flap downwards, simultaneously controlling the drive end of a drive mechanism to drive the first or second hinge shaft to rotate counterclockwise, and through the transmission action of the first rocker arm, the second rocker arm, and the transmission rod, the first and second hinge shafts rotate synchronously. This causes the first and second rollers to move upwards synchronously, so that the bottom position of the second guide ramp corresponds to the opening positions of the first and second V-grooves, allowing the oil drill pipe to slide into the openings of the first and second V-grooves. The rotation of the first and second rollers then drives the rotating rod to be transported along the axis. Similarly, during material unloading, the left lifting mechanism can be controlled to move the left flap upward. At this time, the repaired oil drill pipe can be supported by the left flap, and at the same time, the repaired oil drill pipe can slide down along the first guide slope on the upper surface of the left flap to the left side of the first roller and / or the second roller, thereby allowing the repaired oil drill pipe to detach from the first roller and the second roller. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.
[0015] Figure 1 A schematic diagram of the structure of this utility model;
[0016] Figure 2A schematic diagram of the left flap mechanism in this utility model;
[0017] Figure 3 A schematic diagram of the right-flipping mechanism in this utility model;
[0018] Figure 4 A schematic diagram of the conveyor wheel mechanism in this utility model;
[0019] Explanation of the labels in the diagram:
[0020] 1. Rack;
[0021] 2. Left flap mechanism; 21. Left flap; 22. First guide ramp; 23. Left bracket; 24. Left lifting cylinder; 25. Left linear guide rail; 26. Left telescopic rod; 27. Left pin support; 28. Left guide rail bracket; 29. Left guide rail slider;
[0022] 3. Right flip plate mechanism; 31. Right flip plate; 32. Second guide slope; 33. Right bracket; 34. Right lifting cylinder; 35. Right linear guide rail; 36. Right telescopic rod; 37. Right pin support; 38. Right guide rail bracket; 39. Right guide rail slider;
[0023] 4. Conveying wheel mechanism; 410. First support frame; 411. First hinge shaft; 412. First rocker arm; 413. First rocker arm; 414. First rotary motor; 415. First roller; 417. First V-groove; 420. Second support frame; 421. Second hinge shaft; 422. Second rocker arm; 423. Second rocker arm; 424. Second rotary motor; 425. Second roller; 427. Second V-groove; 430. Transmission rod; 440. Telescopic motor; 450. Connecting rod. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0025] Example 1, as Figures 1 to 4 As shown, a heavy-duty pneumatic auxiliary machine for a tube lathe includes a frame 1, on which are mounted several sets of left-side flipping mechanisms 2, several sets of right-side flipping mechanisms 3, and several sets of conveyor wheel mechanisms 4.
[0026] The left flip-plate mechanism includes a left lifting mechanism and a left flip-plate 21. The left lifting mechanism is installed on the left side of the frame 1. The lifting drive end of the left lifting mechanism is connected to the lower surface of the left flip-plate 21 and is used to drive the left flip-plate 21 to move up and down. A first guide slope 22 is provided on the upper surface of the left flip-plate 21. The right flip-plate mechanism includes a right lifting mechanism and a right flip-plate 31. The right lifting mechanism is installed on the right side of the frame 1. The lifting drive end of the right lifting mechanism is connected to the lower surface of the right flip-plate 31 and is used to drive the right flip-plate 31 to move up and down. A second guide slope 32 is provided on the upper surface of the right flip-plate 31.
[0027] The conveyor wheel mechanism 4 includes a first support frame 410, a second support frame 420, and a drive mechanism. Both the first support frame 410 and the second support frame 420 are fixedly mounted on the frame 1. A first hinge shaft 411 is rotatably connected to the top of the first support frame 410 via a bearing seat. Two first rocker arms 412 and a first rocker rod 413 are fixedly connected to the outer surface of the first hinge shaft 411. A first rotary motor 414 is fixedly mounted on the outside of one of the first rocker arms 412. The drive shaft of the first rotary motor 414 passes through the two first rocker arms 412 sequentially and is connected to the two first rocker arms 412 via bearings. A first roller 415 is arranged between the two first rocker arms 412. The first roller 415 is fixedly mounted on the outer surface of the drive shaft of the first rotary motor 414, and a first V-groove 417 surrounds the outer surface of the first roller 415. A second hinge shaft 421 is rotatably connected to the top of the second support frame 420 via a bearing seat. Two second rocker arms 422 and one second rocker arm 423 are fixedly connected to the outer surface of the 21. A second rotary motor 424 is fixedly mounted on the outside of one of the second rocker arms 422. The drive shaft of the second rotary motor 424 passes through the two second rocker arms 422 in sequence and is connected to the two second rocker arms 422 through bearings. A second roller 425 is provided between the two second rocker arms 422. The second roller 425 is fixedly mounted on the outer surface of the drive shaft of the second rotary motor 424. A second V-groove 427 is surrounded on the outer surface of the second roller 425. The second V-groove 427 is directly opposite to the first V-groove 417. The lower end of the first rocker arm 413 is connected to one end of the transmission rod 430 through a pin. The lower end of the second rocker arm 423 is connected to the other end of the transmission rod 430 through a pin. The driving end of the drive mechanism is connected to the first hinge shaft 411 or the second hinge shaft 421 to drive the first hinge shaft 411 or the second hinge shaft 421 to rotate.
[0028] The bottom of the first guide slope 22 is located to the left of the first roller 415 and / or the second roller 425, and the bottom of the second guide slope 32 corresponds to the front and back of the opening of the first V-groove 417 and / or the second V-groove 427.
[0029] Working principle:
[0030] When in use, first control the lifting drive end of the right lifting mechanism to drive the right flap 31 to move upward, so that the right end of the right flap 31 corresponds to the discharge end of the feeding rack; since the oil drill pipe is a cylindrical structure, the oil drill pipe to be repaired can slide down to the bottom position along the second guide slope 32 on the upper surface of the right flap 31 through the guiding action of the second guide slope 32.
[0031] Then, the lifting drive end of the right lifting mechanism is controlled to move the right flap 31 downward. At the same time, the drive end of the drive mechanism is controlled to drive the first hinge shaft 411 or the second hinge shaft 421 to rotate counterclockwise. Since the first hinge shaft 411 is fixedly connected to the upper end of the first rocker arm 413, and the second hinge shaft 421 is connected to the upper end of the second rocker arm 423, and the first rocker arm 413 and the second rocker arm 423 are connected to each other through the transmission rod 430, when the first hinge shaft 411 / second hinge shaft 421 is driven to drive the first rocker arm 413 / second rocker arm 423 to rotate, the second rocker arm 423 / first rocker arm 413 can be driven to rotate synchronously through the transmission action of the transmission rod 430, thereby achieving the effect of synchronous rotation of the first hinge shaft 411 and the second hinge shaft 421. Therefore, the synchronous rotation of the first hinge shaft 411 and the second hinge shaft 421 drives the first rocker arm 412 and the second rocker arm 422 to rotate upward synchronously, thereby driving the first roller 415 between the two first rocker arms 412 and the second roller 425 between the two second rocker arms 422 to move upward synchronously; and since the bottom position of the second guide slope 32 corresponds to the slot positions of the first V-groove 417 and the second V-groove 427, the oil drill pipe to be repaired can slide into the slots of the first V-groove 417 and the second V-groove 427.
[0032] Then, the first rotary motor 414 and the second rotary motor 424 are controlled to operate synchronously, so as to drive the first roller 415 and the second roller 425 to rotate synchronously via the drive shaft. Through the synchronous rotation of multiple first rollers 415 and second rollers 425, the oil drill pipe to be repaired is moved forward along its axial direction to the corresponding position in the lathe spindle hole. After the oil drill pipe is clamped by the lathe chuck, the drive end of the drive mechanism is controlled to drive the first hinge shaft 411 and the second hinge shaft 421 to rotate clockwise synchronously, so as to drive the first rocker arm 412 and the second rocker arm 422 to rotate downwards synchronously, thereby moving the first roller 415 and the second roller 425 downwards to their initial positions. Then, the lathe is controlled to start working to repair the threads on the head of the oil drill pipe. After the repair is completed, the drive end of the drive mechanism is controlled to drive the first hinge shaft 411 and the second hinge shaft 421 to rotate counterclockwise in sync, so as to drive the first roller 415 and the second roller 425 to move upward again to support the oil drill pipe. Then, the lathe chuck is controlled to release, and the drive end of the drive mechanism is controlled to drive the first hinge shaft 411 and the second hinge shaft 421 to rotate clockwise again, so as to drive the first roller 415 and the second roller 425 to move downward to the initial position. The drive shafts of the first rotary motor 414 and the second rotary motor 424 are controlled to rotate in opposite directions, so as to drive the repaired oil drill pipe to move backward to the designated position.
[0033] Then, the lifting drive end of the left lifting mechanism is controlled to move the left flap 21 upward. At this time, the repaired oil drill pipe can be supported by the support of the left flap 21, and at the same time, the repaired oil drill pipe can slide down along the first guide slope 22 on the upper surface of the left flap 21 to the left side of the first roller 415 and / or the second roller 425, thereby causing the repaired oil drill pipe to detach from the first roller 415 and the second roller 425.
[0034] In this embodiment, a feeding rack can be set on the left side of the frame 1, and the feeding end of the feeding rack is close to the frame 1. Therefore, the left flip plate 21 can be moved downward by controlling the lifting drive end of the left lifting mechanism so that the left end of the left flip plate 21 is exactly opposite to the feeding end of the feeding rack. Thus, the repaired oil drill pipe can be directly rolled from the upper surface of the left flip plate 21 onto the feeding rack.
[0035] Then repeat the above steps to achieve automatic loading and unloading of oil drill pipes during repair.
[0036] In Embodiment 2, as a further preferred embodiment of Embodiment 1, the left lifting mechanism includes two left supports 23 and a left lifting cylinder 24. Left linear guide rails 25 are fixedly installed on the inner sides of each left support 23. The upper part of the left lifting cylinder 24 is connected to the lower end of the left telescopic rod 26 via a telescopic shaft. A left pin support 27 is installed on the lower surface of the left flap 21, and the upper end of the left telescopic rod 26 is connected to the left pin support 27 via a pin. Left guide rail supports 28 are vertically fixedly installed on both sides of the lower surface of the left flap 21, and left guide rail sliders 29 are installed on the outer sides of each left guide rail support 28. The two left guide rail supports 28 form sliding pairs with the two left linear guide rails 25 respectively through the left guide rail sliders 29.
[0037] Therefore, when controlling the left flap 21 to move up and down, the left telescopic rod 26 can be moved up and down by controlling the telescopic shaft of the left lifting cylinder 24. Since the left guide rail bracket 28 on the lower surface of the left flap 21 is slidably connected to the left linear guide rail 25 via the left guide rail slider 29, the left flap 21 can only move up and down along the left linear guide rail 25. Therefore, the left telescopic rod 26 can be used to move the left flap 21 in a linear motion. Furthermore, in this embodiment, by setting the left pin support 27, the connection point between the left telescopic rod 26 and the left flap 21 has a certain angular offset, effectively avoiding the problem of damage to the left telescopic rod 26 due to a slight angular offset of the left flap 21 caused by the gravity of the oil drill pipe.
[0038] In embodiment three, as a further preferred embodiment one, the right lifting mechanism includes two right supports 33 and a right lifting cylinder 34. Right linear guide rails 35 are fixedly installed on the inner sides of each right support 33. The upper part of the right lifting cylinder 34 is connected to the lower end of the right telescopic rod 36 via a telescopic shaft. A right pin support 37 is installed on the lower surface of the right flap 31, and the upper end of the right telescopic rod 36 is connected to the right pin support 37 via a pin. Right guide rail supports 38 are vertically fixedly installed on both sides of the lower surface of the right flap 31. Right guide rail sliders 39 are installed on the outer sides of each right guide rail support 38. The two right guide rail supports 38 form sliding pairs with the two right linear guide rails 35 respectively through the right guide rail sliders 39.
[0039] Therefore, when controlling the right flap 31 to move up and down, the right telescopic rod 36 can be moved up and down by controlling the telescopic shaft of the right lifting cylinder 34. Since the right guide rail bracket 38 on the lower surface of the right flap 31 is slidably connected to the right linear guide rail 35 via the right guide rail slider 39, the right flap 31 can only move up and down along the right linear guide rail 35. Therefore, the right telescopic rod 36 can be used to move the right flap 31 in a linear motion. Furthermore, in this embodiment, by setting a right pin support 37, the connection point between the right telescopic rod 36 and the right flap 31 has a certain angular offset, effectively avoiding damage to the right telescopic rod 36 due to a slight angular offset caused by the gravity of the oil drill pipe.
[0040] In Embodiment 4, as a further preferred embodiment of Embodiment 1, the driving mechanism includes a telescopic cylinder 440. One end of the telescopic cylinder 440 is hinged to the frame 1 via a rotating shaft seat. The other end of the telescopic motor 440 is connected to one end of the drive rod via a telescopic shaft. The other end of the drive rod is connected to one end of the connecting rod 450 via a pin. The other end of the connecting rod 450 is fixedly sleeved on the outer surface of the first hinge shaft 411 or the second hinge shaft 421.
[0041] Therefore, when the first hinge shaft 411 and the second hinge shaft 421 are rotated counterclockwise, the extension shaft of the telescopic cylinder 440 can be extended to drive the drive rod to move towards the connecting rod 450. Since the lower end of the connecting rod 450 is rotatably connected to the drive rod through a pin, the movement of the drive rod can drive the connecting rod 450 to rotate around the first hinge shaft 411 or the second hinge shaft 421. Since the other end of the connecting rod 450 is fixedly connected to the first hinge shaft 411 or the second hinge shaft 421, the rotation of the connecting rod 450 can drive the first hinge shaft 411 or the second hinge shaft 421 to rotate counterclockwise. Then, through the transmission action of the first rocker arm 413, the second rocker arm 423 and the transmission rod 430, the first hinge shaft 411 and the second hinge shaft 421 can be controlled to rotate counterclockwise synchronously. Similarly, when controlling the first hinge pin 411 and the second hinge pin 421 to rotate clockwise, the telescopic shaft of the telescopic motor 440 can be retracted, and then the connecting rod 450 can be pulled by the drive rod to rotate in the opposite direction around the first hinge pin 411 or the second hinge pin 421, thereby driving the first hinge pin 411 or the second hinge pin 421 to rotate clockwise. Then, through the transmission action of the first rocker arm 413, the second rocker arm 423 and the transmission rod 430, the first hinge pin 411 and the second hinge pin 421 can be controlled to rotate clockwise synchronously. In this embodiment, the telescopic motor 440 is hinged to the frame 1 through a pivot seat, so when the connecting rod 11 is driven to rotate by the drive rod, the telescopic motor 440 can also make adaptive angle adjustments.
[0042] In this invention, a controller can be provided, and the signal output terminal of the controller can be connected to the signal input terminals of the left lifting cylinder 24, the right lifting cylinder 34, the first rotary motor 414, the second rotary motor 424, and the telescopic motor 440, respectively. Thus, the control chip within the controller can achieve automated control of the left lifting cylinder 24, the right lifting cylinder 34, the first rotary motor 414, the second rotary motor 424, and the telescopic motor 440.
[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A heavy-duty pneumatic auxiliary machine for a pipe lathe, characterized by: Includes a frame (1), on which are provided several sets of left flip plate mechanisms (2), several sets of right flip plate mechanisms (3) and several sets of conveyor wheel mechanisms (4). The left flip-plate mechanism includes a left lifting mechanism and a left flip-plate (21). The left lifting mechanism is installed on the left side of the frame (1). The lifting drive end of the left lifting mechanism is connected to the lower surface of the left flip-plate (21) to drive the left flip-plate (21) to move up and down. The upper surface of the left flip-plate (21) is provided with a first guide slope (22). The right flip-plate mechanism includes a right lifting mechanism and a right flip-plate (31). The right lifting mechanism is installed on the right side of the frame (1). The lifting drive end of the right lifting mechanism is connected to the lower surface of the right flip-plate (31) to drive the right flip-plate (31) to move up and down. The upper surface of the right flip-plate (31) is provided with a second guide slope (32). The conveyor wheel mechanism (4) includes a first support frame (410), a second support frame (420), and a drive mechanism. The first support frame (410) and the second support frame (420) are both fixedly mounted on the frame (1). A first hinge shaft (411) is rotatably connected above the first support frame (410) via a bearing seat. Two first rocker arms (412) and a first rocker arm (413) are fixedly connected to the outer surface of the first hinge shaft (411). A first rotary motor (413) is fixedly mounted on the outside of one of the first rocker arms (412). 4) The drive shaft of the first rotating motor (414) passes through the two first rocker arms (412) in sequence and is connected to the two first rocker arms (412) by bearings. A first roller (415) is provided between the two first rocker arms (412). The first roller (415) is fixedly installed on the outer surface of the drive shaft of the first rotating motor (414). A first V-groove (417) surrounds the outer surface of the first roller (415). A second hinge shaft (421) is rotatably connected above the second support frame (420) through a bearing seat. Two second rocker arms (422) and a second rocker arm (423) are fixedly connected to the outer surface of the shaft (421); a second rotary motor (424) is fixedly mounted on the outside of one of the second rocker arms (422), the drive shaft of the second rotary motor (424) passes through the two second rocker arms (422) in sequence and is connected to the two second rocker arms (422) through bearings, and a second roller (425) is provided between the two second rocker arms (422), the second roller (425) being fixedly mounted on the outer surface of the drive shaft of the second rotary motor (424). The outer surface of the second roller (425) is surrounded by a second V-groove (427); the second V-groove (427) and the first V-groove (417) are directly opposite each other; the lower end of the first rocker arm (413) is connected to one end of the transmission rod (430) by a pin, and the lower end of the second rocker arm (423) is connected to the other end of the transmission rod (430) by a pin; the driving end of the driving mechanism is connected to the first hinge shaft (411) or the second hinge shaft (421) for driving the first hinge shaft (411) or the second hinge shaft (421) to rotate; The bottom end of the first guide slope (22) is located on the left side of the first roller (415) and / or the second roller (425), and the bottom end of the second guide slope (32) corresponds to the front and back of the opening of the first V-groove (417) and / or the second V-groove (427).
2. The heavy-duty pneumatic auxiliary machine for a tube lathe according to claim 1, characterized in that: The left lifting mechanism includes two left supports (23) and a left lifting cylinder (24). The inner side of each left support (23) is fixedly equipped with a left linear guide rail (25). The upper part of the left lifting cylinder (24) is connected to the lower end of the left telescopic rod (26) through a telescopic shaft. The lower surface of the left flap (21) is equipped with a left pin support (27). The upper end of the left telescopic rod (26) is connected to the left pin support (27) through a pin. The lower surfaces of the left flap (21) are vertically equipped with left guide rail supports (28). The outer side of each left guide rail support (28) is equipped with a left guide rail slider (29). The two left guide rail supports (28) form sliding pairs with the two left linear guide rails (25) through the left guide rail slider (29).
3. A heavy duty pneumatic auxiliary machine for a pipe lathe according to claim 1, characterized in that: The right lifting mechanism includes two right supports (33) and a right lifting cylinder (34). The inner side of each right support (33) is fixedly equipped with a right linear guide rail (35). The upper part of the right lifting cylinder (34) is connected to the lower end of the right telescopic rod (36) through a telescopic shaft. The lower surface of the right flap (31) is equipped with a right pin support (37). The upper end of the right telescopic rod (36) is connected to the right pin support (37) through a pin. The lower surface of the right flap (31) is vertically equipped with right guide rail supports (38) on both sides. The outer side of each right guide rail support (38) is equipped with a right guide rail slider (39). The two right guide rail supports (38) form sliding pairs with the two right linear guide rails (35) respectively through the right guide rail slider (39).
4. A heavy duty pneumatic auxiliary machine for a pipe lathe according to claim 1, characterized in that: The driving mechanism includes a telescopic cylinder (440), one end of which is hinged to the frame (1) via a rotating shaft seat. The other end of the telescopic motor (440) is connected to one end of the drive rod via a telescopic shaft. The other end of the drive rod is connected to one end of the connecting rod (450) via a pin. The other end of the connecting rod (450) is fixedly sleeved on the outer surface of the first hinge shaft (411) or the second hinge shaft (421).