Pipe cutting device for seamless steel pipe

Abstract

The invention relates to the technical field of steel pipe cutting, and particularly discloses a seamless steel pipe cutting device which comprises a base and a supporting frame. A pair of concave blocks is arranged on the top surface of the base; the top ends of the pair of concave blocks are rotationally connected with supporting rollers; the supporting frame is installed on the top face of the base, and a first electric push rod is installed on the supporting frame. Cutting motors are mounted at the output ends of the first electric push rods; the output end of the cutting motor is coaxially and fixedly connected with a rotating shaft; the end part of the rotating shaft is coaxially and fixedly connected with a cutting blade; a fixing ring allowing a steel pipe to penetrate through is installed on the top face of the base. A rotating mechanism capable of driving the steel pipe to rotate is arranged on the fixing ring; and when the cutting blades cut the wall of the steel pipe, the steel pipe is rotated through the rotating mechanism, so that the cutting blades can uniformly cut the steel pipe along the outer circle of the steel pipe, the cutting depth of the cutting knife is reduced, and the service life of the cutting knife is prolonged.

Description

Technical Field

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

[0002] Seamless steel pipe is made by perforating a whole round steel and has no welds on the surface. Steel pipe cutting is an important link in steel pipe processing. Its main purpose is to accurately cut the steel pipe according to the predetermined size to meet different engineering and process requirements. Steel pipe cutting is not only related to the utilization rate of materials, but also affects the quality and production efficiency of the final product.

[0003] In the prior art, when cutting steel pipes, the cutter mostly cuts the steel pipe along the diameter direction of the steel pipe. However, when cutting steel pipes with larger diameters, the feed depth of the cutter is large, which accelerates the wear of the cutter and affects the service life of the cutter. Summary of the invention

[0004] The present application provides a pipe cutting device for seamless steel pipes, which has the function of reducing the feeding and cutting depth of the cutting knife and increasing the service life of the cutting knife.

[0005] The present application provides a seamless steel pipe cutting device, which adopts the following technical solution: A pipe cutting device for seamless steel pipes comprises a base and a support frame; a pair of concave blocks are arranged on the top surface of the base; support rollers are rotatably connected to the two side walls at the top ends of the pair of concave blocks; the support frame is vertically installed on the top surface of the base, and a first electric push rod is vertically installed on the top wall of the support frame; a cutting motor located at the bottom of the top wall of the support frame is installed at the output end of the first electric push rod through a connecting plate; a rotating shaft is coaxially fixedly connected to the output end of the cutting motor; a cutting blade is coaxially fixedly connected to the end of the rotating shaft away from the cutting motor; a fixing ring for the steel pipe placed on the two concave blocks to pass through is vertically installed on the top surface of the base; a rotating mechanism that can drive the steel pipe to rotate is arranged on the fixing ring.

[0006] By adopting the above technical solution, the steel pipe is placed on the two concave blocks and one end of the steel pipe is passed through the fixed ring. The steel pipe is supported by the support rollers arranged on the top of the two concave blocks. When cutting the steel pipe, the first electric push rod is started to drive the cutting motor to move downward, so that the cutting blade contacts the steel pipe. When the cutting motor drives the cutting blade to rotate, the cutting blade cuts the wall of the steel pipe, and then the steel pipe is rotated by the rotating mechanism on the fixed ring, so that the cutting blade cuts the steel pipe evenly along the outer circle of the steel pipe, thereby reducing the cutting depth of the cutting knife and increasing the service life of the cutting knife.

[0007] Preferably, the rotating mechanism includes a rotating ring and a driving motor; the rotating ring is coaxially rotatably connected to one end face of the fixed ring, and a gear ring is coaxially fixed to the outer circumferential surface of the rotating ring; the driving motor is installed on the outer side wall of the fixed ring, and the output end of the driving motor is coaxially fixed to a driving shaft; a gear meshing with the gear ring is coaxially fixed to the outer side wall of the end of the driving shaft close to the gear ring; a clamping assembly that can clamp and fix the steel pipe is provided on the end face of the rotating ring away from the fixed ring.

[0008] By adopting the above technical solution, after one end of the steel pipe passes through the fixed ring and the rotating ring, the outer wall of the steel pipe is clamped and fixed by the clamping assembly, so that the rotating ring and the steel pipe remain relatively stationary. When the steel pipe needs to be rotated to cut the outer circle of the steel pipe, the drive motor is started to drive the drive shaft and the gear to rotate. Under the meshing cooperation of the gear and the gear ring, the rotating ring drives the steel pipe to rotate.

[0009] Preferably, the clamping assembly includes a plurality of fixed blocks; the plurality of fixed blocks are fixedly connected to the end face of the rotating ring away from the fixed ring, and the plurality of fixed blocks are evenly arranged along the outer circumference of the axis of the rotating ring; the fixed blocks are provided with threaded through holes arranged radially along the rotating ring; a threaded rod passing through the fixed blocks is threadedly connected to the inner side wall of the threaded through hole.

[0010] By adopting the above technical solution, after one end of the steel pipe passes through the fixed ring and the rotating ring, the threaded rod on the fixed block is rotated to cause the threaded rod to move toward the steel pipe and press against the outer wall of the steel pipe. The steel pipe is clamped and fixed by the cooperation of multiple threaded rods arranged along the outer circumference of the steel pipe, so as to drive the steel pipe to rotate.

[0011] Preferably, the top surface of the connecting plate is fixedly connected to a protective cover arranged outside the top end of the cutting blade through a connecting rod; a brush plate is fixedly connected to the inner wall of the protective cover; and bristles contacting the end surface of the cutting blade are arranged on the side wall of the brush plate close to the cutting blade.

[0012] By adopting the above technical solution, when the cutting blade cuts the outer wall of the steel pipe, the protective cover can reduce the possibility of sparks and debris generated during the cutting process splashing, and the bristles can clean the debris and impurities on the cutting blade during the rotation of the cutting blade, reducing the possibility of a large amount of metal debris adhering to the cutting blade affecting the cutting accuracy.

[0013] Preferably, a cavity is provided inside the brush plate; an air nozzle extending into the inside of the bristles is fixedly connected to the inner wall of the cavity near the bristles; the air nozzle is connected to the cavity; and a blowing mechanism capable of reciprocatingly blowing air into the cavity is provided on the outer wall of the protective cover.

[0014] By adopting the above technical solution, in the process of using the bristles to clean the cutting blade, air is blown back and forth into the cavity of the brush plate through the blowing mechanism, and the gas in the cavity is then sprayed out through the air nozzle to clean the bristles, thereby reducing the possibility of waste debris and impurities adhering to the bristles, thereby ensuring the cleaning effect of the bristles on the cutting blade.

[0015] Preferably, the blowing mechanism includes a concave shell, an airbag and a cam; the concave shell is fixedly connected to the outer wall of the protective shell at the top of the rotating shaft, and a push block is slidably connected to the inner wall of the top end of the concave shell through a spring; the bottom end of the push block extends out of the bottom of the concave shell and is provided with an arc surface; the airbag is arranged in the concave shell on the side of the push block connected to the spring, and the airbag is connected to an air pipe connected to the cavity; the cam is fixedly connected to the outer wall of the rotating shaft close to the push block, and the cam can contact and cooperate with the arc surface at the bottom end of the push block to squeeze the push block to slide.

[0016] By adopting the above technical solution, when the cutting motor drives the rotating shaft and the cutting blade to rotate, the rotating shaft drives the cam to rotate. When the cam contacts the arc surface at the bottom end of the push block, the cam squeezes the push block to move up the compression spring and squeezes the airbag, so that the gas inside the airbag is transported to the cavity through the air pipe; when the cam loses contact with the push block, the push block falls back and resets under the elastic force of the spring, and the airbag returns to air, so that the cam can reciprocately squeeze the push block and slide, and the airbag can blow air into the cavity reciprocatingly.

[0017] Preferably, a connecting frame is fixedly connected to the side wall of the concave block; a second electric push rod is vertically installed on the top wall of the connecting frame; the output end of the second electric push rod is rotatably connected to a limiting roller; the limiting roller is located at the top of the middle position between the two supporting rollers.

[0018] By adopting the above technical solution, after the steel pipe is placed on the two concave frames, the second electric push rod is started to drive the limiting roller to move downward, so that the limiting roller contacts the outer wall of the top end of the steel pipe to press the steel pipe, so that the two parts of the steel pipe can still be pressed on the concave block after the steel pipe is cut off, reducing the possibility of the steel pipe falling after being cut off and interfering with the cutting knife to cause damage to the steel pipe.

[0019] Preferably, the top surface of the base is provided with a first slide groove arranged axially along the fixing ring, and a first motor is installed on the outer wall at one end of the base; a first screw rod extending into the first slide groove is coaxially fixedly connected to the output end of the first motor; a pair of first sliding blocks slidingly matched with the inner wall of the first slide groove are sleeved on the outer wall of the first screw rod; a pair of concave blocks are respectively fixedly connected to the top surfaces of a pair of first sliding blocks; the first screw rod and the two first sliding blocks are both threadedly matched, and the threads of the first screw rod and the two first sliding blocks are symmetrically arranged.

[0020] By adopting the above technical solution, when the first motor is started to drive the first screw to rotate, the two first sliding blocks will move toward or away from each other along the inner wall of the first sliding groove, thereby adjusting the distance between the two concave blocks so that the two concave blocks can support steel pipes of different lengths.

[0021] Preferably, the top surface of the base is provided with a second slide groove arranged axially along the fixing ring, and a second motor is installed on the outer wall at one end of the base; the output end of the second motor is coaxially fixed with a second screw rod extending into the second slide groove; the outer wall of the second screw rod is provided with a second slider which cooperates with the threaded transmission of the second screw rod; the second slider is slidably matched with the inner wall of the second slide groove; the support frame is fixedly connected to the top surface of the second slider.

[0022] By adopting the above technical solution, when the second motor is started to drive the second screw rod to rotate, the second slider will move along the inner wall of the second slide groove, prompting the support frame to slide and adjust its position, thereby achieving the adjustment of the steel pipe cutting position.

[0023] Preferably, a hydraulic push rod is vertically installed on the bottom surface of the base corresponding to the position of the fixing ring; the output end of the hydraulic push rod passes through the base and is fixedly connected to the outer side wall of the fixing ring.

[0024] By adopting the above technical solution, the hydraulic push rod can drive the fixing ring to rise and fall to adjust the height of the center of the fixing ring, so that steel pipes of different diameters can pass through the fixing ring from the center of the fixing ring for clamping, thereby improving the application range of the device.

[0025] In summary, this application has the following beneficial effects: 1. The steel pipe is supported by two concave blocks. When cutting the steel pipe, the first electric push rod is started to drive the cutting motor to move downward, so that the cutting blade contacts the steel pipe and cuts the wall of the steel pipe. During the cutting process, the steel pipe is driven to rotate by the rotating mechanism arranged on the fixed ring, so that the cutting blade can evenly cut the steel pipe along the outer circle of the steel pipe, thereby reducing the cutting depth of the cutting knife and improving the service life of the cutting knife. 2. By starting the first motor, the first screw rod can be driven to rotate, so that the two first sliders move toward or away from each other along the inner wall of the first slide groove, thereby adjusting the distance between the two concave blocks so that the two concave blocks can support steel pipes of different lengths; 3. By starting the second motor, the second screw rod can be driven to rotate, prompting the second slider to move along the inner wall of the second slide groove, so that the support frame slides to adjust the position, thereby realizing the control of the cutting position of the steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a pipe cutting device for seamless steel pipes; Figure 2It is a schematic diagram of the matching structure of the second motor, the second screw rod and the support frame in the present application; Figure 3 It is a schematic diagram of the matching structure of the first motor, the first screw rod and the two concave blocks in the present application; Figure 4 It is a schematic diagram of the matching structure of the hydraulic push rod, the fixed ring and the rotating mechanism in this application; Figure 5 It is a schematic diagram of the matching structure of the cutting motor, cutting blade and protective cover in this application; Figure 6 It is a schematic diagram of the matching structure of the brush plate, bristles and air nozzle in this application; Figure 7 It is a structural schematic diagram of the blowing mechanism in this application.

[0027] Description of reference numerals: 1. base; 11. first slide; 12. first motor; 13. first screw rod; 14. first slider; 15. second slide; 16. second motor; 17. second screw rod; 18. second slider; 2. support frame; 21. first electric push rod; 22. cutting motor; 23. rotating shaft; 24. cutting blade; 25. protective cover; 26. brush plate; 261. bristles; 262. cavity; 27. air nozzle; 3. concave block; 3 1. Support roller; 32. Connecting frame; 33. Second electric push rod; 34. Limit roller; 4. Fixed ring; 41. Hydraulic push rod; 5. Rotating mechanism; 51. Rotating ring; 52. Driving motor; 53. Gear ring; 54. Driving shaft; 55. Gear; 56. Clamping assembly; 561. Fixed block; 562. Threaded rod; 6. Blowing mechanism; 61. Concave shell; 62. Air bag; 63. Cam; 64. Spring; 65. Push block; 66. Air pipe. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. The same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper", "lower", "bottom" and "top" used in the following description refer to directions in the accompanying drawings, and the terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] The present invention discloses a pipe cutting device for seamless steel pipes, such as Figure 1 , Figure 2 and Figure 3As shown, it includes a base 1, a support frame 2, a first electric push rod 21 and a cutting motor 22. A pair of concave blocks 3 are vertically installed on the top surface of the base 1. The top ends of the two side walls of the two concave blocks 3 that are away from each other are rotatably connected with support rollers 31. The support frame 2 is vertically installed on the top surface of the base 1 on one side of the two concave blocks 3. The support frame 2 is in an inverted L shape. The first electric push rod 21 is vertically installed on the top wall of the support frame 2. The output end of the first electric push rod 21 extends to the bottom of the top wall of the support frame 2. The cutting motor 22 is horizontally installed on the output end of the first electric push rod 21 through a connecting plate. The output end of the cutting motor 22 is coaxially fixed with a rotating shaft 23, and the end of the rotating shaft 23 away from the cutting motor 22 is coaxially fixed with a cutting blade 24.

[0030] The steel pipe is placed horizontally on the top surface of the two concave blocks 3, and two supporting rollers 31 are arranged on the top of the concave blocks 3 to support the steel pipe. When the steel pipe needs to be cut, the first electric push rod 21 is started to drive the cutting motor 22 to move downward gradually, and the cutting motor 22 is started to drive the cutting blade 24 to rotate, so that the gradually moving downward cutting blade 24 cuts the steel pipe. During the steel pipe cutting process, the cutting blade 24 can be rotated to cut along the outer circle of the steel pipe, thereby reducing the cutting depth of the cutting knife and increasing the service life of the cutting knife.

[0031] like Figure 1 and Figure 3 As shown, a first slide groove 11 arranged along the connecting line direction of the two concave blocks 3 is opened on the top surface of the base 1, and a first motor 12 is installed on the outer wall of one end of the base 1. The first motor 12 is a brake motor, and a first screw rod 13 extending into the first slide groove 11 is coaxially fixed to the output end of the first motor 12. The first screw rod 13 is rotatably matched with the inner wall of the first slide groove 11, and a pair of first sliders 14 threadedly matched with the first screw rod 13 are sleeved on the outer wall of the first screw rod 13. The threads of the first screw rod 13 and the two first sliders 14 are symmetrically arranged, and the two first sliders 14 are both slidably matched with the inner wall of the first slide groove 11, and the two concave blocks 3 are respectively fixed to the top surfaces of the two first sliders 14.

[0032] When the first motor 12 is started to drive the first screw rod 13 to rotate, the two first sliders 14 will move toward or away from each other along the inner wall of the first slide groove 11, thereby adjusting the distance between the two concave blocks 3 so that the two concave blocks 3 can support steel pipes of different lengths.

[0033] like Figure 1 and Figure 3 As shown, a connecting frame 32 is fixedly connected to the side wall of the concave block 3 away from the support frame 2, and the connecting frame 32 is an inverted L-shape. A second electric push rod 33 located at the top of the concave block 3 is vertically installed on the top wall of the connecting frame 32. The output end of the second electric push rod 33 extends to the bottom of the top wall of the connecting frame 32, and the output end of the second electric push rod 33 is rotatably connected to a limiting roller 34. The limiting roller 34 is coaxial with the two support rollers 31 and is located at the top of the middle position of the two support rollers 31.

[0034] After placing the steel pipe on the concave frame, start the second electric push rod 33 to drive the limiting roller 34 to move downward to press the steel pipe, so that the two parts of the steel pipe after being cut can still be pressed on the concave block 3, thereby reducing the possibility of the steel pipe falling after being cut and interfering with the cutting knife to cause damage to the steel pipe.

[0035] like Figure 1 and Figure 2 As shown, the top surface of the base 1 is provided with a second slide groove 15 arranged in the same direction as the first slide groove 11, and a second motor 16 is installed on the outer wall of one end of the base 1. The second motor 16 is a brake motor, and the output end of the second motor 16 is coaxially fixed with a second screw rod 17 extending into the second slide groove 15. The second screw rod 17 is rotatably matched with the inner wall of the second slide groove 15, and the outer part of the second screw rod 17 is sleeved with a second slider 18 threadedly matched with the second screw rod 17. The second slider 18 is slidably matched with the inner wall of the second slide groove 15, and the support frame 2 is vertically fixed to the top surface of the second slider 18.

[0036] When the steel pipe is cut short, the second motor 16 can be started to drive the second screw rod 17 to rotate, and the second slider 18 will move along the inner wall of the second slide groove 15, prompting the support frame 2 to slide and adjust its position, thereby adjusting the cutting position of the steel pipe.

[0037] like Figure 1 and Figure 4 As shown, a fixing ring 4 for the steel pipe to pass through is vertically arranged on one side of the base 1 in the direction of the connection line between the two concave blocks 3. A pair of hydraulic push rods 41 are vertically installed on the bottom surface of the base 1 corresponding to the position of the fixing ring 4. The output ends of the two hydraulic push rods 41 penetrate the base 1 and are fixed to the outer wall of the fixing ring 4. A rotating mechanism 5 that can drive the steel pipe to rotate is arranged on the fixing ring 4. The rotating mechanism 5 includes a rotating ring 51, a driving motor 52, a gear ring 53, a gear 55 and a clamping assembly 56. The rotating ring 51 is coaxially connected to the rotating ring 51. On one end face of the fixed ring 4, the ring gear 53 is coaxially fixed to the outer circumferential surface of the rotating ring 51, the driving motor 52 is horizontally installed on the outer wall of the fixed ring 4, the output end of the driving motor 52 is coaxially fixed with the driving shaft 54, the gear 55 is coaxially fixed to the outer side wall of the end of the driving shaft 54 ​​away from the driving motor 52, the gear 55 is meshed with the ring gear 53, and the clamping assembly 56 is arranged on the end face of the rotating ring 51 away from the fixed ring 4, and the clamping assembly 56 can clamp and fix the outer wall of the steel pipe passing through the fixed ring 4 and the rotating ring 51.

[0038] One end of the steel pipe placed on the concave block 3 is passed through the fixed ring 4 and the rotating ring 51, and the outer wall of the steel pipe is clamped and fixed by the clamping assembly 56. During the steel pipe cutting process, the driving motor 52 can be started to drive the driving shaft 54 ​​and the gear 55 to rotate. Under the meshing cooperation of the gear 55 and the gear ring 53, the rotating ring 51 drives the steel pipe to rotate, so that the cutting knife can cut the steel pipe along the outer circle of the steel pipe.

[0039] like Figure 1 and Figure 4 As shown, the clamping assembly 56 includes a plurality of fixed blocks 561, and the plurality of fixed blocks 561 are fixedly connected to the end surface of the rotating ring 51 away from the fixed ring 4, and the plurality of fixed blocks 561 are evenly spaced and arranged along the outer periphery of the axis of the rotating ring 51, and each of the fixed blocks 561 is provided with a threaded through hole arranged along the radial direction of the rotating ring 51, and a threaded rod 562 passing through the fixed block 561 is threadedly connected to the inner side wall of each threaded through hole.

[0040] After one end of the steel pipe passes through the fixed ring 4 and the rotating ring 51, the threaded rod 562 on the rotating fixed block 561 is pressed against the outer wall of the steel pipe. The steel pipe is clamped and fixed by the cooperation of multiple threaded rods 562, so that the rotating ring 51 can drive the steel pipe to rotate synchronously during the rotation process.

[0041] like Figure 2 and Figure 5 As shown, a protective cover 25 is fixedly connected to the top surface of the connecting plate through a connecting rod and is arranged on the outside of the top end of the cutting blade 24. A pair of brush plates 26 are fixedly connected to the inner wall of the protective cover 25 and are respectively located on the outside of both sides of the cutting blade 24. Bristles 261 that contact the end surface of the cutting blade 24 are arranged on the end surfaces of the two brush plates 26 that are close to each other.

[0042] The setting of the protective cover 25 can reduce the possibility of sparks and debris flying during the cutting process. The bristles 261 can clean the debris and impurities on the cutting blade 24 during the rotation of the cutting blade 24, reduce the possibility of more metal debris adhering to the cutting blade 24, and improve the cutting accuracy.

[0043] like Figure 5 , Figure 6 and Figure 7As shown, a cavity 262 is provided inside the two brush plates 26. A plurality of air nozzles 27 connected to the cavity 262 are fixedly connected on the inner side wall of the cavity 262 near the bristles 261. The air nozzles 27 are horizontally oriented toward the cutting blade 24 and extend into the bristles 261. A blowing mechanism 6 is provided on the outer wall of the protective cover 25 for reciprocatingly blowing air into the cavity 262 of the two brush plates 26. The blowing mechanism 6 includes a concave shell 61, an air bag 62, a cam 63 and a push block 65. The concave shell 61 is fixedly connected to the outer wall of the protective cover 25. The concave shell 61 is open downward and is located at the top of the rotating shaft 23. The push block 65 is slidably connected to the inner wall of the concave shell 61, and the top surface of the push block 65 is connected to the inner wall of the top end of the concave shell 61 through a pair of springs 64. The bottom end of the push block 65 extends to the bottom of the concave shell 61 and is provided with an arc surface. The airbag 62 is arranged in the concave shell 61 at the top of the push block 65. The airbag 62 is connected to an air pipe 66. The ends of the air pipe 66 away from the airbag 62 are respectively connected to the inside of the two cavities 262. The cam 63 is fixedly connected to the outer wall of the rotating shaft 23 close to the push block 65. The cam 63 can contact and cooperate with the arc surface of the bottom end of the push block 65 to drive the push block 65 to slide up.

[0044] During the rotation of the rotating shaft 23 and the cutting blade 24, the rotating shaft 23 drives the cam 63 to rotate. When the cam 63 contacts the arc surface at the bottom end of the push block 65, the cam 63 squeezes the push block 65 to move up, compresses the spring 64 and squeezes the airbag 62, so that the gas inside the airbag 62 is transported to the cavity 262 through the air pipe 66; when the cam 63 loses contact with the push block 65, the push block 65 falls back and resets under the elastic force of the spring 64, and the airbag 62 returns air, so that the cam 63 reciprocates and squeezes the push block 65 to slide, and the airbag 62 blows air back and forth into the cavity 262. When the gas blown into the cavity 262 is ejected through the air nozzle 27, the bristles 261 can be sprayed and cleaned, thereby reducing the possibility of waste debris and impurities adhering to the bristles 261 and ensuring the cleaning effect of the bristles 261.

[0045] Working principle: Place the steel pipe on the two concave blocks 3 and support the steel pipe through the support roller 31, and pass the end of the steel pipe close to the fixed ring 4 through the fixed ring 4 and the rotating ring 51, and clamp one end of the steel pipe through the clamping assembly 56 set on the outer end surface of the rotating ring 51, so that the steel pipe and the rotating ring 51 remain relatively still, and start the second electric push rod 33 to drive the limit roller 34 to move downward, so that the limit roller 34 presses the outer wall of the top end of the steel pipe to ensure the stability of the steel pipe during the cutting process; When cutting the steel pipe, the first electric push rod 21 is started to drive the cutting motor 22 to gradually move downward, and the cutting motor 22 is started to drive the cutting blade 24 to rotate. When the cutting blade 24 contacts the steel pipe, the cutting blade 24 cuts the wall of the steel pipe. When the cutting blade 24 cuts the wall of the steel pipe, the driving motor 52 is started to drive the driving shaft 54 ​​and the gear 55 to rotate. Under the meshing cooperation between the gear 55 and the gear ring 53, the rotating ring 51 drives the steel pipe to rotate, so that the cutting blade 24 can evenly cut the steel pipe along the outer circle of the steel pipe, thereby reducing the cutting depth of the cutting knife and increasing the service life of the cutting knife. When the cutting position of the steel pipe needs to be adjusted, the second motor 16 can be started to drive the second screw rod 17 to rotate. When the second screw rod 17 rotates, the second slider 18 moves along the inner wall of the second slide groove 15, driving the support frame 2 to slide and adjust the position, thereby realizing the adjustment of the cutting position of the steel pipe.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipe cutting device for seamless steel pipes, characterized in that: The invention comprises a base (1) and a support frame (2); a pair of concave blocks (3) are arranged on the top surface of the base (1); support rollers (31) are rotatably connected to the two side walls at the top of the pair of concave blocks (3); the support frame (2) is vertically mounted on the top surface of the base (1), and a first electric push rod (21) is vertically mounted on the top wall of the support frame (2); a cutting motor (22) located at the bottom of the top wall of the support frame (2) is mounted on the output end of the first electric push rod (21) through a connecting plate; a rotating shaft (23) is coaxially fixedly connected to the output end of the cutting motor (22); a cutting blade (24) is coaxially fixedly connected to the end of the rotating shaft (23) away from the cutting motor (22); a fixing ring (4) is vertically mounted on the top surface of the base (1) for the steel pipe placed on the two concave blocks (3) to pass through; a rotating mechanism (5) that can drive the steel pipe to rotate is arranged on the fixing ring (4).

2. A seamless steel pipe cutting device according to claim 1, characterized in that: The rotating mechanism (5) comprises a rotating ring (51) and a driving motor (52); the rotating ring (51) is coaxially connected to one end face of a fixed ring (4), and a gear ring (53) is coaxially fixedly connected to the outer peripheral surface of the rotating ring (51); the driving motor (52) is mounted on the outer side wall of the fixed ring (4), and a driving shaft (54) is coaxially fixedly connected to the output end of the driving motor (52); a gear (55) meshing with the gear ring (53) is coaxially fixedly connected to the outer side wall of the end of the driving shaft (54) close to the gear ring (53); and a clamping assembly (56) capable of clamping and fixing a steel pipe is provided on the end face of the rotating ring (51) away from the fixed ring (4).

3. A seamless steel pipe cutting device according to claim 2, characterized in that: The clamping assembly (56) comprises a plurality of fixing blocks (561); the plurality of fixing blocks (561) are fixedly connected to the end surface of the rotating ring (51) away from the fixing ring (4), and the plurality of fixing blocks (561) are evenly arranged along the outer periphery of the axis of the rotating ring (51); the fixing blocks (561) are provided with threaded through holes arranged along the radial direction of the rotating ring (51); and the inner side wall of the threaded through hole is threadedly connected with a threaded rod (562) penetrating the fixing blocks (561).

4. A seamless steel pipe cutting device according to claim 1, characterized in that: The top surface of the connecting plate is fixedly connected to a protective cover (25) arranged outside the top end of the cutting blade (24) via a connecting rod; a brush plate (26) is fixedly connected to the inner side wall of the protective cover (25); and bristles (261) contacting the end surface of the cutting blade (24) are arranged on the side wall of the brush plate (26) close to the cutting blade (24).

5. A seamless steel pipe cutting device according to claim 4, characterized in that: A cavity (262) is arranged inside the brush plate (26); an air nozzle (27) extending into the interior of the bristles (261) is fixedly connected to the inner wall of the cavity (262) near the bristles (261); the air nozzle (27) is communicated with the cavity (262); and a blowing mechanism (6) capable of reciprocatingly blowing air into the cavity (262) is arranged on the outer wall of the protective cover (25).

6. A seamless steel pipe cutting device according to claim 5, characterized in that: The blowing mechanism (6) comprises a concave shell (61), an air bag (62) and a cam (63); the concave shell (61) is fixedly connected to the outer wall of the protective shell at the top of the rotating shaft (23); a push block (65) is slidably connected to the inner wall of the top end of the concave shell (61) via a spring (64); the bottom end of the push block (65) extends out of the bottom of the concave shell (61) and is provided with an arc surface; the air bag (62) is arranged in the concave shell (61) on the side of the push block (65) connected to the spring (64), and the air bag (62) is connected to an air delivery pipe (66) communicating with the cavity (262); the cam (63) is fixedly connected to the outer wall of the rotating shaft (23) close to the push block (65), and the cam (63) can contact and cooperate with the arc surface of the bottom end of the push block (65) to squeeze the push block (65) to slide.

7. The seamless steel pipe cutting device according to claim 1, characterized in that: A connecting frame (32) is fixedly connected to the side wall of the concave block (3); a second electric push rod (33) is vertically mounted on the top wall of the connecting frame (32); the output end of the second electric push rod (33) is rotatably connected to a limiting roller (34); the limiting roller (34) is located at the top of the middle position of the two supporting rollers (31).

8. The seamless steel pipe cutting device according to claim 1, characterized in that: The top surface of the base (1) is provided with a first slide groove (11) arranged axially along the fixing ring (4), and a first motor (12) is installed on the outer side wall of one end of the base (1); the output end of the first motor (12) is coaxially fixedly connected with a first screw rod (13) extending into the first slide groove (11); the outer wall of the first screw rod (13) is sleeved with a pair of first sliders (14) slidingly matched with the inner wall of the first slide groove (11); a pair of concave blocks (3) are respectively fixedly connected to the top surfaces of the pair of first sliders (14); the first screw rod (13) and the two first sliders (14) are both threadedly matched, and the threads of the first screw rod (13) and the two first sliders (14) are symmetrically arranged.

9. A seamless steel pipe cutting device according to claim 1, characterized in that: The top surface of the base (1) is provided with a second slide groove (15) arranged axially along the fixing ring (4); a second motor (16) is installed on the outer wall of one end of the base (1); the output end of the second motor (16) is coaxially fixedly connected with a second screw rod (17) extending into the second slide groove (15); the outer wall of the second screw rod (17) is sleeved with a second slider (18) threadedly matched with the second screw rod (17); the second slider (18) is slidably matched with the inner wall of the second slide groove (15); the support frame (2) is fixedly connected to the top surface of the second slider (18).

10. The seamless steel pipe cutting device according to claim 1, characterized in that: A hydraulic push rod (41) is vertically mounted on the bottom surface of the base (1) at a position corresponding to the location of the fixing ring (4); the output end of the hydraulic push rod (41) passes through the base (1) and is fixedly connected to the outer side wall of the fixing ring (4).

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