Cutting equipment for steel pipe production

Abstract

The invention relates to the technical field of steel pipe cutting, in particular to cutting equipment for steel pipe production, which comprises a fixing device, a driving device arranged in the fixing device, a cutting device matched with the driving device to move, and a rotating device arranged below the cutting device. According to the cutting equipment for steel pipe production, when a laser cutting head is started for cutting, the rotating direction of an output shaft of a driving motor is changed, a movable support is driven to move upwards, and then a transmission part is matched to drive a butt joint roller to rotate, so that a steel pipe rotates below the laser cutting head, the automation of the whole device is improved, and meanwhile the production efficiency is improved. And the investment of additional driving equipment is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel pipe cutting, in particular to a cutting device used for steel pipe production. Background Art

[0002] Steel pipe cutting is a basic process in metal processing, which mainly involves using professional equipment to accurately cut steel pipes into specific lengths or shapes. This process usually adopts a variety of methods such as sawing, grinding wheel cutting, plasma cutting or laser cutting to meet the needs of steel pipes of different materials, wall thicknesses and diameters.

[0003] The patent with application number CN202220998013.2 discloses a steel pipe cutting machine, which relates to the technical field of steel pipe cutting equipment, including a support, a rotating disk is rotatably arranged on the support, and a driving mechanism for driving the rotating disk to rotate continuously is arranged on the support; an adjusting disk is rotatably arranged on the rotating disk; a plurality of knife seats distributed along the circumference of the rotating disk are arranged between the rotating disk and the adjusting disk, a plurality of sliding grooves extending radially thereof are formed on the rotating disk, and a sliding bar that slides with the sliding groove is formed on the knife seat.

[0004] Existing steel pipe cutting equipment often lacks precise clamping or fixing mechanisms, which makes the steel pipe easily disturbed by external forces during the cutting process and causes displacement or vibration, seriously weakening the straightness and verticality of the cutting, thereby reducing the cutting accuracy. In addition, in order to achieve the rotational positioning of the steel pipe and the flexible movement of the cutting head, these devices often need to rely on additional drive components, which not only increases the manufacturing cost of the equipment, but also increases the difficulty and cost of subsequent maintenance.

[0005] In view of this, we propose cutting equipment for steel pipe production. Summary of the invention

[0006] The object of the present invention is to provide a cutting device for steel pipe production to solve the problems raised in the above background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: Cutting equipment for steel pipe production, comprising a fixing device, a driving device arranged inside the fixing device, a cutting device moving in coordination with the driving device, and a rotating device arranged below the cutting device; The fixing device comprises a fixing frame, a plurality of limiting protrusions arranged inside the fixing frame, and a first pressure spring arranged on the outer side wall of the limiting protrusion; The driving device includes a driving motor, two screws rotating with the output shaft of the driving motor, a movable bracket displaced with the rotation of the screws, a transmission rod rotating in coordination with the screws, and a worm arranged at the end of the transmission rod; The cutting device comprises a mounting platform, a limit slide bar arranged on the top surfaces at both ends of the mounting platform, a laser cutting head moving with the mounting platform, and a pressing part arranged on the bottom surfaces at both ends of the mounting platform; The pressing part comprises a fixed frame, a flip bracket arranged on both sides of the fixed frame, a flip spring which provides a downward force for the flip bracket through its own elastic force, and pulleys arranged on the bottom surfaces of both ends of the fixed frame and the ends of the flip bracket; The rotating device comprises a set of outer jacket brackets arranged in parallel, two docking rollers arranged inside the outer jacket brackets, a rotating shaft driving the two docking rollers to rotate, ratchets arranged at both ends of the rotating shaft, and a transmission part sleeved on the outside of the ratchets; The transmission part comprises an outer ring body, a plurality of ratchets arranged on the inner ring wall of the outer ring body, and a worm gear arranged on the outer ring wall of the outer ring body.

[0008] In the technical solution of the present invention, both sides of the outer wall of the fixed frame are provided with frame wall through grooves that penetrate inside and outside, and a limiting sliding groove that penetrates inside and outside is provided at the center position of the outer wall of the fixed frame. Circular holes for providing a sliding range for the limiting protrusion are provided at the corners on both sides of the limiting sliding groove, and an outer convex plate is welded on the bottom surface of the fixed frame, and upper convex brackets are fixedly connected to the top surface of the outer convex plate by bolts on both sides.

[0009] In the technical solution of the present invention, one end of the first pressure spring is welded to the outer wall of the limiting protrusion, and the other end is welded and fixed to the inner wall of the circular hole of the limiting slide groove. The elastic force provided by the first pressure spring pushes the limiting protrusion to move toward the direction of the limiting slide groove.

[0010] In the technical solution of the present invention, the driving motor is fixedly connected to the top surface of the fixed frame by bolts, the upper and lower ends of the screw rod are rotatably connected to the inner side walls of the upper and lower ends of the fixed frame, the end of a starting screw rod is coaxially connected to the output shaft of the driving motor, and a synchronous belt is provided near the top of the two screw rods.

[0011] In the technical solution of the present invention, the movable bracket is threadedly connected to the screw rods at both ends, and the two ends of the movable bracket extend to the outside of the frame wall through groove. One end of the transmission rod is rotatably connected to the end of the upper convex bracket, and the other end is rotatably connected to the inner wall of the fixed frame. The worm gear is clamped and fixed to the outer wall of the transmission rod, and the outer wall of the screw rod is clamped with a main bevel gear, and the end position of the transmission rod is clamped with a secondary bevel gear meshing with the main bevel gear.

[0012] In the technical solution of the present invention, the transverse cross-section of the mounting platform is T-shaped, the outer convex plate of the mounting platform is slidably connected to the inside of the limiting slide groove, and both sides of the outer convex plate of the mounting platform are provided with limiting openings that are compatible with the limiting protrusions. The limiting slide rod is clamped and fixed on the top surface of the mounting platform, and the limiting slide rod is slidably connected to the end of the movable bracket.

[0013] In the technical solution of the present invention, the flip bracket is rotatably connected to the outer side walls at both ends of the fixed frame, one end of the downward spring is welded to the outer side wall of the fixed frame, and the other end is welded to the top surface of the flip bracket, and a limiting telescopic rod is clamped on the top surface of the fixed frame, and the top end of the limiting telescopic rod is clamped on the bottom surface of the mounting platform, and a second pressure spring is sleeved on the outer side of the limiting telescopic rod.

[0014] In the technical solution of the present invention, the outer sleeve bracket is fixedly connected to the top surface of the outer convex flat plate by bolts, the docking roller is rotatably connected to the inner wall of the outer sleeve bracket, a docking gear is clamped on the inner side of the annular groove on the outer wall of the docking roller, and the two ends of the rotating shaft are rotatably connected to the outer wall of the outer sleeve bracket.

[0015] In the technical solution of the present invention, a driving gear is fixedly connected to the outer side wall of the rotating shaft via a bayonet pin, the driving gear is meshed with the docking gear, and the ratchet is fixed at the end position of the rotating shaft by a bayonet pin.

[0016] In the technical solution of the present invention, a limiting ring body is integrally formed on the side wall of the outer sleeve ring body close to one end of the outer sleeve bracket, the limiting ring body is rotatably connected to the outer side wall of the outer sleeve bracket, the pawl is rotatably connected to the inside of the groove of the inner ring wall of the outer sleeve ring body, and the worm gear is clamped on the outer side wall of the outer sleeve ring body and meshes with the worm.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The cutting equipment used for steel pipe production can drive the change of the overall position of the cutting device by changing the position of the movable bracket in the driving device. When the laser cutting head is moved to the outer wall of the steel pipe, the downward pressure part can prevent the steel pipe from moving or shaking during the cutting process, thereby ensuring the straightness and verticality of the cutting and improving the cutting accuracy.

[0018] 2. The cutting equipment used for steel pipe production starts the laser cutting head for cutting, and at the same time, changes the rotation direction of the output shaft of the driving motor to drive the movable bracket to move upward, and then cooperates with the transmission part to drive the docking roller to rotate, so that the steel pipe rotates under the laser cutting head, which improves the automation of the overall device and saves the investment in additional driving equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the structure of the fixing device in the present invention.

[0021] Figure 3 For the present invention Figure 2 Enlarged schematic diagram of part A.

[0022] Figure 4 It is a schematic diagram of the structure of the driving device in the present invention.

[0023] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged portion B.

[0024] Figure 6 It is a schematic diagram of the structure of the cutting device in the present invention.

[0025] Figure 7 It is a structural schematic diagram of the lower pressing part in the present invention.

[0026] Figure 8 It is a structural schematic diagram of the rotating device in the present invention.

[0027] Fig. 9 It is a partial structural schematic diagram of the rotating device in the present invention.

[0028] Fig.10 It is a structural schematic diagram of the transmission part in the present invention.

[0029] Description of reference numerals: 100, fixing device; 110, fixing frame; 111, frame wall through groove; 112, limiting slide groove; 120, outer convex plate; 130, upper convex bracket; 140, limiting convex block; 150, first pressure spring; 200, driving device; 210, driving motor; 220, lead screw; 230, synchronous belt; 240, movable bracket; 250, transmission rod; 260, worm; 270, main bevel gear; 280, auxiliary bevel gear; 300, cutting device; 310, mounting platform; 311, position-limiting opening; 320, position-limiting sliding rod; 330, laser cutting head; 340, pressing part; 341, fixing frame; 342, flip bracket; 343, flip spring; 344, position-limiting telescopic rod; 345, second pressure spring; 346, pulley; 400, rotating device; 410, outer sleeve bracket; 420, docking roller; 430, docking gear; 440, rotating shaft; 450, driving gear; 460, ratchet; 470, transmission part; 471, outer sleeve ring body; 472, limiting ring body; 473, pawl; 474, worm gear. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 10 As shown, this embodiment provides a technical solution: A cutting device for steel pipe production, comprising a fixing device 100, a driving device 200 disposed inside the fixing device 100, a cutting device 300 moving in coordination with the driving device 200, and a rotating device 400 disposed below the cutting device 300; In the present invention, the fixing device 100 includes a fixing frame 110, a plurality of limiting protrusions 140 disposed inside the fixing frame 110, and a first pressure spring 150 disposed on the outer side wall of the limiting protrusion 140; Specifically, both sides of the outer wall of the fixed frame 110 are provided with frame wall through grooves 111 that penetrate inside and outside, and a limiting sliding groove 112 that penetrates inside and outside is opened at the center position of the outer wall of the fixed frame 110. Circular holes for providing a sliding range for the limiting protrusion 140 are opened at the corners on both sides of the limiting sliding groove 112. An outer convex plate 120 is welded on the bottom surface of the fixed frame 110, and upper convex brackets 130 are fixedly connected to the top surface of the outer convex plate 120 by bolts on both sides.

[0032] Furthermore, one end of the first pressure spring 150 is welded to the outer wall of the limiting protrusion 140, and the other end is welded and fixed to the inner wall of the circular hole of the limiting slide groove 112. The elastic force provided by the first pressure spring 150 pushes the limiting protrusion 140 to move toward the direction of the limiting slide groove 112.

[0033] Furthermore, the fixed frame 110 and the outer convex flat plate 120 are used to ensure the strength of the overall device of the fixing device 100, the frame wall groove 111 is used to provide a moving range for the device in the driving device 200, the limiting slide groove 112 is used to limit the overall moving range of the cutting device 300, and the upper convex bracket 130 is used to provide a rotation base point for the structure in the driving device 200.

[0034] In this embodiment, Figure 4-Figure 5 As shown, the driving device 200 includes a driving motor 210, two screws 220 rotating with the output shaft of the driving motor 210, a movable bracket 240 that moves with the rotation of the screws 220, a transmission rod 250 rotating with the screws 220, and a worm 260 disposed at the end of the transmission rod 250; Specifically, the drive motor 210 is fixedly connected to the top surface of the fixed frame 110 by bolts, and the upper and lower ends of the screw rod 220 are rotatably connected to the inner side walls of the upper and lower ends of the fixed frame 110. The end of a starting screw rod is coaxially connected to the output shaft of the drive motor 210, and a synchronous belt 230 is provided near the top of the two screw rods 220.

[0035] Furthermore, the movable bracket 240 is threadedly connected to the screw rod 220 at both ends, and the two ends of the movable bracket 240 extend to the outside of the frame wall groove 111. One end of the transmission rod 250 is rotatably connected to the end of the upper convex bracket 130, and the other end is rotatably connected to the inner wall of the fixed frame 110. The worm gear 260 is clamped and fixed on the outer wall of the transmission rod 250. The outer wall of the screw rod 220 is clamped with a main bevel gear 270, and the end position of the transmission rod 250 is clamped with a secondary bevel gear 280 that meshes with the main bevel gear 270.

[0036] Furthermore, after the drive motor 210 is started, it drives the screw rod 220 below to rotate, and through the synchronous belt 230, drives the two screw rods 220 to rotate at the same time, so that the position of the movable bracket 240 moves downward inside the limiting slide groove 112. When the rotation direction of the output shaft of the drive motor 210 is controlled to turn, the main bevel gear 270 at the bottom of the screw rod 220 cooperates with the secondary bevel gear 280 to drive the transmission rod 250 to rotate, and then the worm 260 rotates therewith.

[0037] In this embodiment, Figure 6-Figure 7 As shown, the cutting device 300 includes a mounting platform 310, a limit slide bar 320 disposed on the top surfaces of both ends of the mounting platform 310, a laser cutting head 330 that moves with the mounting platform 310, and a pressing portion 340 disposed on the bottom surfaces of both ends of the mounting platform 310; Specifically, the pressing part 340 includes a fixed frame 341, a flip bracket 342 arranged on both sides of the fixed frame 341, a downward spring 343 that provides a downward force to the flip bracket 342 through its own elastic force, and a pulley 346 arranged on the bottom surface of both ends of the fixed frame 341 and the end of the flip bracket 342.

[0038] Furthermore, the transverse cross-section of the mounting platform 310 is T-shaped, and the outer convex plate of the mounting platform 310 is slidably connected to the inside of the limiting slide groove 112. Both sides of the outer convex plate of the mounting platform 310 are provided with limiting openings 311 that are compatible with the limiting protrusion 140. The limiting slide rod 320 is clamped and fixed on the top surface of the mounting platform 310, and the limiting slide rod 320 is slidably connected to the end of the movable bracket 240.

[0039] Furthermore, the flip bracket 342 is rotatably connected to the outer walls at both ends of the fixed frame 341, one end of the downward spring 343 is welded to the outer wall of the fixed frame 341, and the other end is welded to the top surface of the flip bracket 342, and a limiting telescopic rod 344 is clamped on the top surface of the fixed frame 341, and the top end of the limiting telescopic rod 344 is clamped on the bottom surface of the mounting platform 310, and a second pressure spring 345 is sleeved on the outer side of the limiting telescopic rod 344.

[0040] Furthermore, the mounting platform 310 is used to provide a fixed platform for the limiting slide bar 320, the laser cutting head 330 and the pressing portion 340. When the end of the limiting protrusion 140 extends to the inside of the limiting opening 311 under the elastic force of the first pressure spring 150, the overall position of the mounting platform 310 is fixed to prevent the position of the mounting platform 310 from shifting during the cutting process. The end of the movable bracket 240 can slide up and down on the limiting slide bar 320, and when it moves to the top end, the magnetic circular plate of the limiting slide bar 320 will generate suction on the movable bracket 240, and the mounting platform 310 will move downward as the movable bracket 240 moves downward, and the laser cutting head 330 is used to cut the outer wall of the steel pipe.

[0041] Furthermore, the fixed frame 341 is used to raise the rotating platform for the top of the flip bracket 342. When the pulley 346 at the end of the flip bracket 342 conflicts with the outer wall of the steel pipe, the end of the movable bracket 240 is separated from the top of the limiting slide bar 320, and in the process of continuous downward movement, the pulley 346 on the outer wall of the fixed frame 341 is driven to conflict with the outer wall of the steel pipe. At this time, the bottom end of the laser cutting head 330 just moves to the cutting position, and after the second pressure spring 345 and the downward spring 343 are squeezed by the movable bracket 240, their increased elastic force is converted into a force on the outer wall of the steel pipe, and the limiting telescopic rod 344 is used to limit the telescopic range of the second pressure spring 345.

[0042] In this embodiment, Figure 8-Figure 10 As shown, the rotating device 400 includes a set of outer coat brackets 410 arranged in parallel, two docking rollers 420 arranged inside the outer coat brackets 410, a rotating shaft 440 driving the two docking rollers 420 to rotate, ratchet wheels 460 arranged at both ends of the rotating shaft 440, and a transmission part 470 sleeved on the outer side of the ratchet wheel 460; Specifically, the coat bracket 410 is fixedly connected to the top surface of the convex flat plate 120 by bolts, the docking roller 420 is rotatably connected to the inner wall of the coat bracket 410, the inner side of the annular groove on the outer wall of the docking roller 420 is clamped with a docking gear 430, and the two ends of the rotating shaft 440 are rotatably connected to the outer wall of the coat bracket 410.

[0043] Furthermore, a driving gear 450 is fixedly connected to the outer wall of the rotating shaft 440 via a bayonet pin, the driving gear 450 is meshed with the docking gear 430 , and the ratchet 460 is fixedly engaged at the end position of the rotating shaft 440 .

[0044] Furthermore, the transmission part 470 includes an outer ring body 471 , a plurality of ratchets 473 disposed on the inner ring wall of the outer ring body 471 , and a worm gear 474 disposed on the outer ring wall of the outer ring body 471 .

[0045] Furthermore, a limiting ring body 472 is integrally formed on the side wall of the outer sleeve ring body 471 close to one end of the outer sleeve bracket 410, and the limiting ring body 472 is rotatably connected to the outer wall of the outer sleeve bracket 410. The pawl 473 is rotatably connected to the inside of the groove of the inner ring wall of the outer sleeve ring body 471, and the worm gear 474 is clamped on the outer wall of the outer sleeve ring body 471 and meshes with the worm 260.

[0046] Furthermore, the outer sleeve bracket 410 is used to increase the rotation range of the docking roller 420 and the rotating shaft 440. When the worm 260 rotates, it will drive the worm wheel 474 together with the outer sleeve ring body 471 to rotate. At this time, the several pawls 473 on the inner side of the outer sleeve ring body 471 will conflict with the ratchet 460, thereby driving the ratchet 460 together with the rotating shaft 440 to rotate, and then the driving gear 450 cooperates with the docking gear 430 to drive the docking roller 420 to rotate, allowing the steel pipe to rotate under the laser cutting head 330. The pawl 473 will conflict with the ratchet 460 only when the outer sleeve ring body 471 rotates clockwise, thereby driving it to rotate.

[0047] Finally, it should be noted that the drive motor 210 and laser cutting head 330 involved in the present invention are universal standard parts or parts known to technical personnel in this field, and their structures and principles are known to technical personnel in this field through technical manuals or conventional experimental methods. In the idle space of this device, the drive motor 210 and the laser cutting head 330 are connected to the external power supply through wires. The specific connection method should refer to the working principle of the present invention. The electrical connections between the electrical components are completed in a sequential working order, and the detailed connection methods are all well-known technologies in the field.

[0048] When the cutting device for steel pipe production of the present invention is used, first, the steel pipe to be cut is transported to the top of the docking roller 420 in the rotating device 400, and it is ensured that the position to be cut is located directly below the laser cutting head 330; Next, after the driving motor 210 is started, it drives the screw rod 220 below to rotate, and through the synchronous belt 230, drives the two screw rods 220 to rotate simultaneously, thereby allowing the position of the movable bracket 240 to move downward inside the limiting slide groove 112; When the pulley 346 at the end of the flip bracket 342 in the pressing part 340 contacts the outer wall of the steel pipe, the end of the movable bracket 240 separates from the top of the limit slide bar 320, and in the process of continuing to move downward, the pulley 346 on the outer wall of the fixed frame 341 contacts the outer wall of the steel pipe; At this time, the bottom end of the laser cutting head 330 just moves to the cutting position, and after the second pressure spring 345 and the downward spring 343 are squeezed by the movable bracket 240, the increased elastic force of themselves is converted into a force acting on the outer wall of the steel pipe, and the end of the limiting protrusion 140 also extends to the inside of the limiting opening 311 under the elastic force of the first pressure spring 150; Then, the laser cutting head 330 is started, and the rotation direction of the output shaft of the driving motor 210 is controlled to turn, so that the main bevel gear 270 at the bottom of the screw rod 220 cooperates with the auxiliary bevel gear 280 to drive the transmission rod 250 to rotate, and then the worm 260 rotates together; When the worm 260 rotates, the worm wheel 474 and the outer ring body 471 are driven to rotate. At this time, the plurality of ratchet claws 473 on the inner side of the outer ring body 471 will conflict with the ratchet wheel 460, and drive the ratchet wheel 460 and the rotating shaft 440 to rotate, so that the driving gear 450 cooperates with the docking gear 430, drives the docking roller 420 to rotate, and makes the steel pipe rotate under the laser cutting head 330; Afterwards, when the end of the movable bracket 240 contacts the top of the limiting slide bar 320 again, the docking roller 420 drives the steel pipe to rotate one circle under the laser cutting head 330, and in the process of continuous upward movement, drives the cutting device 300 as a whole to move away from the steel pipe and upward; Subsequently, after the cut steel pipe is taken out, the above operation is repeated to complete the multi-section cutting of the steel pipe.

[0049] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the specification and its equivalents.

Claims

1. A cutting device for steel pipe production, comprising a fixing device (100), a driving device (200) arranged inside the fixing device (100), a cutting device (300) moving in coordination with the driving device (200), and a rotating device (400) arranged below the cutting device (300); Features: The fixing device (100) comprises a fixing frame (110), a plurality of limiting protrusions (140) arranged inside the fixing frame (110), and a first pressure spring (150) arranged on the outer side wall of the limiting protrusion (140); The driving device (200) comprises a driving motor (210), two screw rods (220) rotating along with the output shaft of the driving motor (210), a movable bracket (240) displaced along with the rotation of the screw rods (220), a transmission rod (250) rotating in coordination with the screw rods (220), and a worm (260) arranged at the end of the transmission rod (250); The cutting device (300) comprises a mounting platform (310), a limiting sliding rod (320) arranged on the top surfaces at both ends of the mounting platform (310), a laser cutting head (330) that moves along with the mounting platform (310), and a pressing portion (340) arranged on the bottom surfaces at both ends of the mounting platform (310); The pressing portion (340) comprises a fixed frame (341), a flip bracket (342) arranged on both sides of the fixed frame (341), a flip spring (343) which provides a downward force for the flip bracket (342) through its own elastic force, and pulleys (346) arranged at the bottom surfaces of both ends of the fixed frame (341) and at the ends of the flip bracket (342); The rotating device (400) comprises a set of outer coat brackets (410) arranged in parallel, two docking rollers (420) arranged inside the outer coat brackets (410), a rotating shaft (440) driving the two docking rollers (420) to rotate, ratchet wheels (460) arranged at both ends of the rotating shaft (440), and a transmission part (470) sleeved on the outside of the ratchet wheels (460); The transmission part (470) comprises an outer ring body (471), a plurality of ratchet claws (473) arranged on the inner ring wall of the outer ring body (471), and a worm gear (474) arranged on the outer ring wall of the outer ring body (471).

2. The cutting device for steel pipe production according to claim 1, characterized in that: Both sides of the outer wall of the fixed frame (110) are provided with frame wall through grooves (111) that penetrate inside and outside, and a limiting sliding groove (112) that penetrates inside and outside is provided at the center position of the outer wall of the fixed frame (110). Circular holes for providing a sliding range for the limiting protrusion (140) are provided at the corners on both sides of the limiting sliding groove (112). An outer convex plate (120) is welded on the bottom surface of the fixed frame (110), and upper convex brackets (130) are fixedly connected to the top surface of the outer convex plate (120) by bolts.

3. The cutting device for steel pipe production according to claim 1, characterized in that: One end of the first pressure spring (150) is welded to the outer wall of the limiting protrusion (140), and the other end is welded and fixed to the inner wall of the circular hole in the groove wall of the limiting slide groove (112). The elastic force provided by the first pressure spring (150) pushes the limiting protrusion (140) to move in the direction of the limiting slide groove (112).

4. The cutting device for steel pipe production according to claim 1, characterized in that: The drive motor (210) is fixedly connected to the top surface of the fixed frame (110) by means of bolts, and the upper and lower ends of the lead screw (220) are rotatably connected to the inner side walls of the upper and lower ends of the fixed frame (110), and the end of a lead screw is coaxially connected to the output shaft of the drive motor (210), and a synchronous belt (230) is sleeved near the top of the two lead screws (220).

5. The cutting device for steel pipe production according to claim 2, characterized in that: The movable bracket (240) is threadedly connected to the screw rod (220) at both ends, and both ends of the movable bracket (240) extend to the outside of the frame wall through groove (111). One end of the transmission rod (250) is rotatably connected to the end of the upper convex bracket (130), and the other end is rotatably connected to the inner wall of the fixed frame (110). The worm (260) is clamped and fixed to the outer wall of the transmission rod (250). The outer wall of the screw rod (220) is clamped with a main bevel gear (270), and the end position of the transmission rod (250) is clamped with a secondary bevel gear (280) meshing with the main bevel gear (270).

6. The cutting device for steel pipe production according to claim 1, characterized in that: The transverse cross-section of the mounting platform (310) is T-shaped, the outer convex plate of the mounting platform (310) is slidably connected to the inside of the limiting slide groove (112), both sides of the outer convex plate of the mounting platform (310) are provided with limiting openings (311) adapted to the limiting protrusions (140), the limiting slide rod (320) is clamped and fixed on the top surface of the mounting platform (310), and the limiting slide rod (320) is slidably connected to the end of the movable bracket (240).

7. The cutting device for steel pipe production according to claim 1, characterized in that: The flip bracket (342) is rotatably connected to the outer side walls at both ends of the fixed frame (341); one end of the flip spring (343) is welded to the outer side wall of the fixed frame (341), and the other end is welded to the top surface of the flip bracket (342); a limiting telescopic rod (344) is clamped on the top surface of the fixed frame (341); the top end of the limiting telescopic rod (344) is clamped on the bottom surface of the mounting platform (310); and a second pressure spring (345) is sleeved on the outer side of the limiting telescopic rod (344).

8. The cutting device for steel pipe production according to claim 1, characterized in that: The outer jacket bracket (410) is fixedly connected to the top surface of the outer convex flat plate (120) by bolts, the docking roller (420) is rotatably connected to the inner wall of the outer jacket bracket (410), and a docking gear (430) is clamped on the inner side of the annular groove on the outer wall of the docking roller (420), and both ends of the rotating shaft (440) are rotatably connected to the outer wall of the outer jacket bracket (410).

9. The cutting device for steel pipe production according to claim 8, characterized in that: A driving gear (450) is fixedly connected to the outer wall of the rotating shaft (440) via a bayonet pin, the driving gear (450) is meshed with the docking gear (430), and the ratchet (460) is fixedly engaged at the end of the rotating shaft (440).

10. The cutting device for steel pipe production according to claim 1, characterized in that: A limiting ring body (472) is integrally formed on the side wall of the outer sleeve ring body (471) close to one end of the outer sleeve bracket (410); the limiting ring body (472) is rotatably connected to the outer wall of the outer sleeve bracket (410); the pawl (473) is rotatably connected to the inside of the groove of the inner ring wall of the outer sleeve ring body (471); and the worm gear (474) is clamped on the outer wall of the outer sleeve ring body (471) and meshes with the worm (260).

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