Heavy pneumatic auxiliary machine of pipe lathe

Abstract

A heavy pneumatic auxiliary machine of a pipe lathe comprises a machine frame, a left turning plate mechanism, a right turning plate mechanism and a conveying wheel mechanism are arranged on the machine frame, the left turning plate mechanism comprises a left lifting mechanism and a left turning plate, and a first guide inclined face is arranged on the left turning plate; the right turning plate mechanism comprises a right lifting mechanism and a right turning plate; a second guide inclined plane is arranged on the right turning plate; the conveying wheel mechanism comprises a first supporting frame, a second supporting frame and a driving mechanism. The upper portion of the first supporting frame is connected with a first rocker arm and a first rocker through a first hinged shaft. A first roller is arranged between the first rocker arms, and a first V-shaped groove surrounds the outside of the first roller; a second rocker arm and a second rocker are connected above the second support frame through a second hinge shaft; a second roller is arranged between the second rocker arms, and a second V-shaped groove surrounds the second roller; the first rocker is connected with a second rocker through a transmission rod. The defects in the prior art are overcome, rapid feeding and discharging work of the petroleum drill rod can be automatically achieved, and the repairing efficiency and safety of the petroleum drill rod are improved.

Description

Technical Field

[0001] The present invention relates to the field of machinery, in particular to oil drill pipe repairing equipment, and specifically to a heavy-duty pneumatic auxiliary machine for a pipe lathe. Background Art

[0002] During oil drilling, drill pipes are connected one by one using internal and external tapered pipe threads. Due to the high forces and temperatures experienced during drilling, coupled with the friction from high-pressure mud, the drill pipe shoulder and thread profile can easily become deformed, worn, or partially damaged, rendering the entire drill pipe useless. Existing techniques utilize 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, and the oil drill pipe needs to be hoisted with lifting equipment during the loading and unloading process. The whole process is not only complicated and inefficient, but also poses safety hazards. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a heavy-duty pneumatic auxiliary machine for a pipe lathe, which overcomes the shortcomings of the existing technology, 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, the present invention is implemented through the following technical solutions: A heavy-duty pneumatic auxiliary machine for a pipe lathe comprises a frame on which are arranged several groups of left flap mechanisms, several groups of right flap mechanisms and several groups of conveying wheel mechanisms. The left flap mechanism includes a left lifting mechanism and a left flap, the left lifting mechanism is installed at the left side of the frame, the lifting drive end of the left lifting mechanism is connected to the lower surface of the left flap, for driving the left flap to move up and down; the upper surface of the left flap is provided with a first guide inclined surface; the right flap mechanism includes a right lifting mechanism and a right flap, the right lifting mechanism is installed at the right side of the frame, the lifting drive end of the right lifting mechanism is connected to the lower surface of the right flap, for driving the right flap to move up and down; the upper surface of the right flap is provided with a second guide inclined surface; The transmission mechanism is a pair of rotating shafts, each of which is connected to the first supporting plate and the second supporting plate, and the rotating shaft is connected to the first supporting plate by a toothed connection. The rotating shaft is a pair of rotating shafts, each of which is connected to the first supporting plate by a toothed connection. The rotating shaft is a pair of rotating shafts, each of which is connected to the first supporting plate by a toothed connection. Two second rocker arms and a second rocker arm are fixedly connected to the outer surfaces of the two hinge shafts; a second rotating motor is fixedly installed on the outside of one of the second rocker arms, and a driving shaft of the second rotating motor passes through the two second rocker arms in sequence and is connected to the two second rocker arms through bearings, and a second roller is provided between the two second rocker arms, and the second roller is fixedly installed on the outer surface of the driving shaft of the second rotating motor, and a second V-shaped groove is surrounded by the outer surface of the second roller; the second V-shaped groove is directly opposite to the first V-shaped groove front and back; the lower end of the first rocker arm is connected to one end of the transmission rod through a pin shaft, and the lower end of the second rocker arm is connected to the other end of the transmission rod through a pin shaft; the driving end of the driving mechanism is connected to the first hinge shaft or the second hinge shaft, for driving the first hinge shaft or the second hinge shaft to rotate; 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 notch of the first V-shaped groove and / or the second V-shaped groove.

[0006] Preferably, the left lifting mechanism includes two left brackets and a left lifting cylinder, and the inner side surfaces of the left brackets are fixedly installed with left linear guide rails; the upper part of the left lifting cylinder is connected to the lower end of the left telescopic rod through a telescopic shaft, and the lower surface of the left flip plate is installed with a left pin shaft support, and the upper end of the left telescopic rod is connected to the left pin shaft support through a pin shaft; left guide rail brackets are vertically installed on both sides of the lower surface of the left flip plate, and left guide rail sliders are installed on the outer side surfaces of the left guide rail brackets, and the two left guide rail brackets respectively form sliding pairs with the two left linear guide rails through left guide rail sliders.

[0007] Preferably, the right lifting mechanism includes two right brackets and a right lifting cylinder, and the inner side surfaces of the right brackets are fixedly installed with right linear guide rails; the upper part of the right lifting cylinder is connected to the lower end of the right telescopic rod through a telescopic shaft, and the lower surface of the right flip plate is installed with a right pin shaft support, and the upper end of the right telescopic rod is connected to the right pin shaft support through a pin shaft; right guide rail brackets are vertically installed on both sides of the lower surface of the right flip plate, and right guide rail sliders are installed on the outer side surfaces of the right guide rail brackets, and the two right guide rail brackets respectively form sliding pairs with the two right linear guide rails through the right guide rail sliders.

[0008] Preferably, the driving mechanism includes a telescopic cylinder, one end of the telescopic cylinder is hinged to the frame through a rotating shaft seat, the other end of the telescopic motor is connected to one end of the driving rod through a telescopic shaft, the other end of the driving rod is connected to one end of the connecting rod through a pin shaft, and the other end of the connecting rod is fixedly sleeved on the outer surface of the first hinge shaft or the second hinge shaft.

[0009] The present invention provides a heavy-duty pneumatic auxiliary machine for a pipe lathe. It has the following beneficial effects: by controlling the lifting drive end of the right lifting mechanism to drive the right flap upward, the oil drill pipe to be repaired can slide along the second guide slope on the right flap to achieve material removal; then, by controlling the lifting drive end of the right lifting mechanism to drive the right flap downward, the driving end of a driving mechanism is controlled to drive the first hinge shaft or the 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 hinge shaft and the second hinge shaft can be synchronously rotated. Subsequently, the first roller and the second roller are synchronously moved upward, so that the bottom end position of the second guide slope corresponds to the front-to-back position of the notch of the first V-groove and the second V-groove, so that the oil drill pipe can slide into the notch of the first V-groove and the second V-groove, and the rotation of the first roller and the second roller drives the rotating rod to be transported along the axis. Similarly, when unloading, the left flap can be driven to move upward by controlling the lifting drive end of the left lifting mechanism. At this time, the repaired oil drill pipe can be supported by the supporting effect of the left flap, and at the same time, the first guide slope on the upper surface of the left flap can be used to guide the repaired oil drill pipe to slide along the first guide slope to the left side of the first roller and / or the second roller, thereby separating the repaired oil drill pipe from the first roller and the second roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the prior art.

[0011] Figure 1 A schematic structural diagram of the present invention; Figure 2 A schematic structural diagram of the left flap mechanism of the present invention; Figure 3 A schematic structural diagram of the right flap mechanism of the present invention; Figure 4 A schematic structural diagram of the conveying wheel mechanism of the present invention; Description of the numbers in the figure: 1. Frame; 2. Left flap mechanism; 21. Left flap; 22. First guide ramp; 23. Left bracket; 24. Left lift cylinder; 25. Left linear guide rail; 26. Left telescopic rod; 27. Left pin support; 28. Left guide rail bracket; 29. Left guide rail slider; 3. Right flap mechanism; 31. Right flap; 32. Second guide ramp; 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; 4. Conveying wheel mechanism; 410. First support frame; 411. First hinge shaft; 412. First rocker arm; 413. First rocker bar; 414. First rotating motor; 415. First roller; 417. First V-shaped groove; 420. Second support frame; 421. Second hinge shaft; 422. Second rocker arm; 423. Second rocker bar; 424. Second rotating motor; 425. Second roller; 427. Second V-shaped groove; 430. Transmission rod; 440. Telescopic motor; 450. Connecting rod. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention.

[0013] Example 1, as Figures 1 to 4 As shown, a heavy-duty pneumatic auxiliary machine for a pipe lathe includes a frame 1, on which are arranged several groups of left flap mechanisms 2, several groups of right flap mechanisms 3 and several groups of conveying wheel mechanisms 4. The left flap mechanism includes a left lifting mechanism and a left flap 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 flap 21, and is used to drive the left flap 21 to move up and down. The upper surface of the left flap 21 is provided with a first guide inclined surface 22. The right flap mechanism includes a right lifting mechanism and a right flap 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 flap 31, and is used to drive the right flap 31 to move up and down. The upper surface of the right flap 31 is provided with a second guide inclined surface 32. The conveying wheel mechanism 4 includes a first support frame 410, a second support frame 420 and a driving mechanism, the first support frame 410 and the second support frame 420 are both fixedly mounted on the frame 1; the first support frame 410 is rotatably connected to a first hinge shaft 411 above the first support frame 410 through a bearing seat, and the outer surface of the first hinge shaft 411 is fixedly connected to two first rocker arms 412 and a first rocker 413; a first rotating motor 414 is fixedly mounted on the outside of one of the first rocker arms 412, and the driving 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 through bearings, and a first roller 415 is provided between the two first rocker arms 412, and the first roller 415 is fixedly mounted on the outer surface of the driving shaft of the first rotating motor 414, and the outer surface of the first roller 415 is surrounded by a first V-shaped groove 417; the second support frame 420 is rotatably connected to the second hinge shaft 421 through a bearing seat, and the second hinge shaft 4 Two second rocker arms 422 and a second rocker 423 are fixedly connected to the outer surface of 21; a second rotating motor 424 is fixedly installed on the outside of one of the second rocker arms 422, and the driving shaft of the second rotating 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, and the second roller 425 is fixedly installed on the outer surface of the driving shaft of the second rotating motor 424, and the outer surface of the second roller 425 is surrounded by a second V-shaped groove 427; the second V-shaped groove 427 is directly opposite to the first V-shaped groove 417 front and back; the lower end of the first rocker arm 413 is connected to one end of the transmission rod 430 through a pin shaft, and the lower end of the second rocker arm 423 is connected to the other end of the transmission rod 430 through a pin shaft; 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 notch of the first V-shaped groove 417 and / or the second V-shaped groove 427 .

[0014] Working principle: During use, the lifting drive end of the right lifting mechanism is first controlled to drive the right flap 31 upward so that the right end of the right flap 31 corresponds to the discharge end of the loading rack. Since the oil drill pipe is a cylindrical structure, the second guide slope 32 on the upper surface of the right flap 31 can guide the oil drill pipe to be repaired to slide along the second guide slope 32 to the bottom position. Then, the lifting drive end of the right lifting mechanism is controlled to drive the right flip plate 31 to move downward. At the same time, the driving end of the driving 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, 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 / the second hinge shaft 421 is driven to drive the first rocker arm 413 / the second rocker arm 423 to rotate, the transmission action of the transmission rod 430 can be used to synchronously drive the second rocker arm 423 / the first rocker arm 413 to rotate synchronously, thereby achieving the synchronous rotation effect 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. Moreover, since the bottom end position of the second guide inclined surface 32 corresponds to the notch position of the first V-shaped groove 417 and the second V-shaped groove 427, the oil drill pipe to be repaired can slide into the notch of the first V-shaped groove 417 and the second V-shaped groove 427 at this time. The first rotary motor 414 and the second rotary motor 424 are then controlled to operate synchronously, driving the first roller 415 and the second roller 425 to rotate synchronously via the drive shaft. The synchronous rotation of the multiple first rollers 415 and the second rollers 425 drives the oil drill pipe to be repaired 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 driving end of the drive mechanism is controlled to drive the first hinge shaft 411 and the second hinge shaft 421 to rotate synchronously clockwise, driving the first rocker arm 412 and the second rocker arm 422 to rotate downward synchronously, thereby causing the first roller 415 and the second roller 425 to move downward to their initial positions. The lathe is then controlled to start working to repair the oil drill pipe head thread. After the repair is completed, the driving end of the driving mechanism is controlled to drive the first hinge shaft 411 and the second hinge shaft 421 to rotate counterclockwise synchronously, so as to drive the first roller 415 and the second roller 425 to move upward again to support the oil drill pipe, and then the lathe chuck is controlled to be loosened, and then the driving end of the driving 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, and the driving shafts of the first rotating motor 414 and the second rotating motor 424 are controlled to rotate in the opposite direction to drive the repaired oil drill pipe to move backward to the specified position.

[0015] Afterwards, the lifting drive end of the left lifting mechanism is controlled to drive the left flap 21 to move upward. At this time, the repaired oil drill pipe can be supported by the supporting effect of the left flap 21, and at the same time, the first guide slope 22 on the upper surface of the left flap 21 can be used to guide the repaired oil drill pipe so that it can slide along the first guide slope 22 to the left side of the first roller 415 and / or the second roller 425, thereby separating the repaired oil drill pipe from the first roller 415 and the second roller 425.

[0016] In this embodiment, a material unloading rack can be set at the left side of the frame 1, and the feeding end of the material unloading rack is close to the frame 1. Therefore, the left flap 21 can be driven downward by controlling the lifting drive end of the left lifting mechanism, so that the left end of the left flap 21 is exactly opposite to the feeding end of the material unloading rack, so that the repaired oil drill pipe can be directly rolled from the upper surface of the left flap 21 to the material unloading rack.

[0017] The above steps are then repeated to achieve the automatic loading and unloading effect when the oil drill pipe is repaired.

[0018] Embodiment 2, as a further preferred embodiment of embodiment 1, the left lifting mechanism includes two left brackets 23 and a left lifting cylinder 24, and the inner side surfaces of the left brackets 23 are fixedly installed with left linear guide rails 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, and the lower surface of the left flap 21 is installed with a left pin shaft support 27, and the upper end of the left telescopic rod 26 is connected to the left pin shaft support 27 through a pin shaft; left guide rail brackets 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 the left guide rail brackets 28. The two left guide rail brackets 28 respectively form sliding pairs with the two left linear guide rails 25 through the left guide rail sliders 29.

[0019] Therefore, when the left flap 21 is controlled to move up and down, the telescopic shaft of the left lift cylinder 24 is controlled to drive the left telescopic rod 26 to move up and down. Furthermore, because the left guide rail bracket 28 on the lower surface of the left flap 21 is slidably connected to the left linear guide 25 via the left guide rail slider 29, the left flap 21 can only move up and down along the left linear guide 25. Therefore, the up and down movement of the left telescopic rod 26 drives the left flap 21 to move linearly up and down. Furthermore, in this embodiment, the provision of the left pin support 27 creates a certain angular offset between the connection point of the left telescopic rod 26 and the left flap 21, effectively preventing damage to the left telescopic rod 26 due to a slight angular offset of the left flap 21 caused by the weight of the oil drill pipe.

[0020] Embodiment three, as a further preferred embodiment of embodiment one, the right lifting mechanism includes two right brackets 33 and a right lifting cylinder 34, and the inner side surfaces of the right brackets 33 are fixedly installed with right linear guide rails 35; the upper side of the right lifting cylinder 34 is connected to the lower end of the right telescopic rod 36 through a telescopic shaft, and the lower surface of the right flip plate 31 is installed with a right pin shaft support 37, and the upper end of the right telescopic rod 36 is connected to the right pin shaft support 37 through a pin shaft; right guide rail brackets 38 are vertically fixedly installed on both sides of the lower surface of the right flip plate 31, and right guide rail sliders 39 are installed on the outer sides of the right guide rail brackets 38. The two right guide rail brackets 38 respectively form sliding pairs with the two right linear guide rails 35 through the right guide rail sliders 39.

[0021] Therefore, when the right flap 31 is controlled to move up and down, the right telescopic rod 36 is driven up and down by controlling the telescopic shaft of the right lifting cylinder 34. Furthermore, because the right guide rail bracket 38 on the lower surface of the right flap 31 is slidably connected to the right linear guide 35 via the right guide slider 39, the right flap 31 can only move up and down along the right linear guide 35. Therefore, the up and down movement of the right telescopic rod 36 drives the right flap 31 to move linearly up and down. Furthermore, in this embodiment, the right pin support 37 is provided to provide a certain angular offset between the connection point of the right telescopic rod 36 and the right flap 31, effectively preventing damage to the right telescopic rod 36 caused by a slight angular offset of the right flap 31 due to the weight of the oil drill pipe.

[0022] 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 through a rotating shaft seat, the other end of the telescopic motor 440 is connected to one end of the driving rod through a telescopic shaft, the other end of the driving rod is connected to one end of the connecting rod 450 through a pin shaft, and 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.

[0023] Therefore, when the first hinge shaft 411 and the second hinge shaft 421 are controlled to rotate counterclockwise, the telescopic shaft of the telescopic cylinder 440 can be extended to drive the driving rod to move toward the connecting rod 450. Since the lower end of the connecting rod 450 is rotatably connected to the driving rod through a pin shaft, the movement of the driving 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, and then the transmission action of the first rocker arm 413, the second rocker arm 423 and the transmission rod 430 can be used to control the first hinge shaft 411 and the second hinge shaft 421 to rotate counterclockwise synchronously. Similarly, when the first hinge shaft 411 and the second hinge shaft 421 are controlled 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 driving rod to rotate in the opposite direction about the first hinge shaft 411 or the second hinge shaft 421, thereby driving the first hinge shaft 411 or the second hinge shaft 421 to rotate clockwise. Then, the first rocker arm 413, the second rocker arm 423 and the transmission rod 430 are used to control the first hinge shaft 411 and the second hinge shaft 421 to rotate synchronously clockwise. In this embodiment, the telescopic motor 440 is hinged to the frame 1 via a rotating shaft seat. Therefore, when the connecting rod 11 is driven to rotate by the driving rod, the telescopic motor 440 can also be adaptively adjusted in angle.

[0024] In the present invention, a controller can be provided, and its signal output terminals can be connected to the signal input terminals of the left lift cylinder 24, the right lift cylinder 34, the first rotary motor 414, the second rotary motor 424, and the telescopic motor 440. Thus, the control chip within the controller can realize automated control of the left lift cylinder 24, the right lift cylinder 34, the first rotary motor 414, the second rotary motor 424, and the telescopic motor 440.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A heavy-duty pneumatic auxiliary machine for a pipe lathe, characterized in that: The machine comprises a frame (1), on which are arranged a plurality of left flip mechanisms (2), a plurality of right flip mechanisms (3) and a plurality of conveying wheel mechanisms (4). The left flap mechanism comprises a left lifting mechanism and a left flap (21), wherein the left lifting mechanism is mounted on the left side of the frame (1), and a lifting drive end of the left lifting mechanism is connected to the lower surface of the left flap (21) for driving the left flap (21) to move up and down; a first guide inclined surface (22) is provided on the upper surface of the left flap (21); the right flap mechanism comprises a right lifting mechanism and a right flap (31), wherein the right lifting mechanism is mounted on the right side of the frame (1), and a lifting drive end of the right lifting mechanism is connected to the lower surface of the right flap (31) for driving the right flap (31) to move up and down; a second guide inclined surface (32) is provided on the upper surface of the right flap (31); The conveying wheel mechanism (4) comprises a first support frame (410), a second support frame (420) and a driving mechanism, wherein 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 to the upper portion of the first support frame (410) via a bearing seat, and the outer surface of the first hinge shaft (411) is fixedly connected to two first rocker arms (412) and a first rocker (413); a first rotating motor (413) is fixedly mounted on the outer portion of one of the first rocker arms (412) 4), the driving shaft of the first rotating motor (414) sequentially passes through the two first rocker arms (412) and is connected to the two first rocker arms (412) through bearings, a first roller (415) is provided between the two first rocker arms (412), the first roller (415) is fixedly mounted on the outer surface of the driving shaft of the first rotating motor (414), and the outer surface of the first roller (415) is surrounded by a first V-shaped groove (417); the second support frame (420) is rotatably connected to a second hinge shaft (421) through a bearing seat, and the second hinge shaft (421) is provided on the upper side of the second supporting frame (420). Two second rocker arms (422) and a second rocker (423) are fixedly connected to the outer surface of the shaft (421); a second rotating motor (424) is fixedly installed on the outside of one of the second rocker arms (422); a driving shaft of the second rotating 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 installed on the outer surface of the driving shaft of the second rotating motor (424) The outer surface of the second roller (425) is surrounded by a second V-shaped groove (427); the second V-shaped groove (427) is directly opposite to the first V-shaped groove (417) in front and back; the lower end of the first rocker (413) is connected to one end of the transmission rod (430) through a pin shaft, and the lower end of the second rocker (423) is connected to the other end of the transmission rod (430) through a pin shaft; 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 front to back to the notch of the first V-shaped groove (417) and / or the second V-shaped groove (427).

2. The heavy-duty pneumatic auxiliary machine for a pipe lathe according to claim 1, characterized in that: The left lifting mechanism comprises two left brackets (23) and a left lifting cylinder (24), and the inner side surfaces of the left brackets (23) are fixedly mounted with left linear guide rails (25); the upper portion of the left lifting cylinder (24) is connected to the lower end of the left telescopic rod (26) via a telescopic shaft, and the lower surface of the left flap (21) is mounted with a left pin support (27), and the upper end of the left telescopic rod (26) is connected to the left pin support (27) via a pin; left guide rail brackets (28) are vertically mounted on both sides of the lower surface of the left flap (21), and left guide rail sliders (29) are mounted on the outer side surfaces of the left guide rail brackets (28), and the two left guide rail brackets (28) respectively form sliding pairs with the two left linear guide rails (25) via the left guide rail sliders (29).

3. The heavy-duty pneumatic auxiliary machine for a pipe lathe according to claim 1, characterized in that: The right lifting mechanism includes two right brackets (33) and a right lifting cylinder (34), and the inner side surfaces of the right brackets (33) are fixedly mounted with right linear guide rails (35); the upper portion of the right lifting cylinder (34) is connected to the lower end of the right telescopic rod (36) through a telescopic shaft, and the lower surface of the right flap (31) is mounted with a right pin support (37), and the upper end of the right telescopic rod (36) is connected to the right pin support (37) through a pin; right guide rail brackets (38) are vertically mounted on both sides of the lower surface of the right flap (31), and right guide rail sliders (39) are mounted on the outer side surfaces of the right guide rail brackets (38), and the two right guide rail brackets (38) respectively form sliding pairs with the two right linear guide rails (35) through the right guide rail sliders (39).

4. The heavy-duty pneumatic auxiliary machine for a pipe lathe according to claim 1, characterized in that: The driving mechanism comprises 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 a driving rod via a telescopic shaft, the other end of the driving rod is connected to one end of a connecting rod (450) via a pin shaft, and 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).

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