Multi-angle cutting device for steel pipe and cutting method thereof

Abstract

The application relates to the technical field of steel pipe processing, and particularly discloses a multi-angle steel pipe cutting device and a cutting method thereof, which comprises a bottom plate and a mounting column, one end of the mounting column is fixedly provided with a first fixing disc, the other end of the mounting column is rotatably provided with a second fixing disc, the outer walls of the first fixing disc and the second fixing disc are both provided with expansion mechanisms which are annularly expanded to the outside, and the expansion mechanism of the outer wall of the first fixing disc is provided with a fixing assembly for fixing a steel pipe. In the application, the cutting blade is used to cut the steel pipe from the inside to the outside, so that the generated waste can be completely collected when the steel pipe is cut, the waste generated during the cutting of the steel pipe by the cutting blade from the inside to the outside can be completely collected in the steel pipe, the waste generated during the cutting of the steel pipe in the traditional way is prevented from flying and affecting the surrounding environment and scalding the workers, and the completeness and cleanness during the cutting of the steel pipe are improved.

Description

Technical Field

[0001] This invention relates to the field of steel pipe processing technology, and in particular to a multi-angle cutting device and cutting method for steel pipes. Background Technology

[0002] Steel pipes are used for transporting fluids and powdery solids, exchanging heat energy, manufacturing mechanical parts and containers, and are also an economical type of steel. The development of steel pipe production technology began with the rise of the bicycle manufacturing industry, the development of oil in the early 19th century, and the manufacture of ships, boilers and aircraft during the two World Wars.

[0003] In steel pipe processing, cutting is often required, necessitating the use of steel pipe cutting equipment. For example, Chinese patent application number 202022218997.1 discloses "a multi-angle steel pipe cutting device, including a worktable with legs fixedly connected to the four corners of the worktable's bottom surface." This invention, through the arrangement of a first motor, gears, a gear ring, a collar, a rotating rod, and an n-shaped plate, causes the cutting wire to deflect, allowing for rotation at any angle. This facilitates adjustment during the deflection process according to the desired cutting angle of the steel pipe. After cutting, the steel pipe ends have burrs, requiring grinding to prevent accidental injury to workers. The first motor, n-shaped plate, and second motor work together to rotate the grinding disc and grind the cut ends of the steel pipe. This device facilitates welding two steel pipes at any angle and effectively grinds their ends, simplifying later use. This effectively saves the time required for fixing the steel pipe during subsequent grinding, further improving work efficiency and increasing the practicality of the device. However, when the aforementioned multi-angle steel pipe cutting device cuts the steel pipe, it uses a cutting molybdenum wire to cut the steel pipe. The cutting molybdenum wire cuts the steel pipe from the outside to the inside. During the cutting process, the cutting molybdenum wire generates heat through frequent friction with the cut surface of the steel pipe, resulting in molten iron filings and burrs that adhere to the cut edge of the steel pipe. Since the steel pipe is cut from the outside to the inside, the molten iron filings and burrs are concentrated on the inner wall of the cut edge. These molten iron filings and burrs located on the inner wall of the steel pipe are difficult to polish later, which may affect the normal use of the cut steel pipe. Therefore, in order to solve this problem, a multi-angle steel pipe cutting device and its cutting method are proposed. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a multi-angle steel pipe cutting device and its cutting method.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-angle steel pipe cutting device includes a base plate and a mounting column. A first fixing plate is fixedly installed at one end of the mounting column, and a second fixing plate is rotatably installed at the other end of the mounting column. Both the first and second fixing plates are provided with an expansion mechanism that expands outward in a ring shape on their outer walls. The expansion mechanism on the outer wall of the first fixing plate is provided with a fixing component for fixing the steel pipe, and the expansion mechanism on the outer wall of the second fixing plate is provided with a cleaning component for cleaning the inner wall of the steel pipe.

[0007] The base plate is connected to a mounting plate via a telescopic mechanism, and the side of the mounting plate is connected to the first fixed plate via several connecting rods;

[0008] An installation ring is slidably mounted on the mounting column. The installation ring is located between the first fixed plate and the second fixed plate. A bearing plate is slidably mounted on the installation ring. A cutting blade for cutting steel pipes is connected to the bearing plate through an angle adjustment mechanism.

[0009] The base plate is equipped with a fixing mechanism for securing the steel pipe.

[0010] Preferably, the expansion mechanism includes a third electric telescopic rod installed on the side of the first fixed plate and the second fixed plate that are far apart from each other. The outer walls of the first fixed plate and the second fixed plate are provided with a plurality of first mounting holes and second mounting holes. A spring is installed in the first mounting hole, and a limit rod is slidably installed in the second mounting hole. The ends of the spring and the limit rod are connected to a fixed plate. The bottom of the fixed plate is hinged to the end of the piston rod of the third electric telescopic rod through a connecting rod.

[0011] Preferably, the fixing component includes an anti-slip plate, which is disposed on a fixing plate on the outer wall of the first fixing plate; the cleaning component includes a grinding plate, which is disposed on a fixing plate on the outer wall of the second fixing plate; the grinding plate is generally in the shape of a right trapezoid, and a plurality of guide grooves are provided on the grinding plate.

[0012] Preferably, the mounting post has a mounting groove at one end near the second fixed plate, and a motor is installed in the mounting groove. The output shaft of the motor is connected to the second fixed plate.

[0013] Preferably, the piston rod end of the third electric telescopic rod is connected to a connecting plate, and the connecting rod end is hinged to the outer wall of the connecting plate.

[0014] Preferably, a first guide rail is installed on the outer wall of the mounting column, a first electric slider is slidably installed on the first guide rail, the inner wall of the mounting ring is fixed on the first electric slider, the mounting column and the mounting ring are coaxial, and the mounting column is located inside the mounting ring. A second guide rail is provided on the outer wall of the mounting ring, a second electric slider is slidably installed on the second guide rail, and a bearing plate is installed on the second electric slider.

[0015] Preferably, the angle adjustment mechanism includes a connecting plate hinged to the support plate, a mounting knife holder installed at the end of the connecting plate, a cutting blade installed on the mounting knife holder, two third mounting holes symmetrically opened on the support plate, the two third mounting holes being located on both sides of the connecting plate respectively, an inflatable airbag column installed in each of the two third mounting holes, the ends of the two inflatable airbag columns being connected to the mounting knife holder, an air pump for inflating the inflatable airbag columns being provided on the support plate, the inflation end of the air pump being connected to the inflatable airbag columns through an air delivery pipe, an exhaust port being opened on each of the two inflatable airbag columns, and an electronic exhaust valve being installed in each of the two exhaust ports.

[0016] Preferably, the telescopic mechanism includes a mounting plate mounted on a base plate, a first electric telescopic rod mounted on the side of the mounting plate, the piston rod end of the first electric telescopic rod being connected to a mounting plate, one end of a connecting rod being fixed to the side of a first fixed plate, the other end of the connecting rod being fixed to the side of the mounting plate, a sliding rod being mounted on the side of the mounting plate away from the first fixed plate, a sliding hole being provided on the side of the mounting plate, the sliding rod being slidably mounted in the sliding hole, a support plate being provided between the mounting plate and the base plate, and a collection groove being provided on the base plate.

[0017] Preferably, the fixing mechanism includes a support frame mounted on the base plate, a top plate connected to the top of the support frame, a second electric telescopic rod installed at the bottom of the top plate, an extrusion plate connected to the piston rod end of the second electric telescopic rod, and limiting seats for fixing the steel pipe installed at the bottom of the extrusion plate and the top of the base plate. The limiting seats have arc-shaped grooves, and the mounting column is located between the limiting seats at the bottom of the extrusion plate and the limiting seats at the top of the base plate.

[0018] The present invention discloses a cutting method for a multi-angle steel pipe cutting device, which includes the following steps:

[0019] S1: First, place the steel pipe to be cut between the limiting seat at the bottom of the extrusion plate and the limiting seat at the top of the base plate. Start the second electric telescopic rod. The piston rod of the second electric telescopic rod pushes the extrusion plate and moves the limiting seat at the bottom of the extrusion plate down to extrude and fix the steel pipe.

[0020] S2: Start the first electric telescopic rod. The piston rod of the first electric telescopic rod extends and pushes the mounting column to move laterally and insert into the steel pipe. At the same time, start the third electric telescopic rod on the side of the mounting column near the second fixed plate. The piston rod of the third electric telescopic rod retracts, causing several fixed plates to expand outward until the grinding plate contacts the inner wall of the steel pipe. Simultaneously, start the motor. The output shaft of the motor drives the second fixed plate to rotate, causing the grinding plate to rotate and grind the inner wall of the steel pipe to remove rust, dust and dirt.

[0021] S3: The rust and dirt generated by the rotating grinding plate grinding the inner wall of the steel pipe fall between the first and second fixed plates through the guide groove on the grinding plate. The rust and dirt accumulate at the bottom of the inner wall of the steel pipe under its own weight. The first electric slider is activated, which moves the cutting blade toward the second fixed plate. The second electric slider is activated, which makes the cutting blade position at the bottom of the outer wall of the mounting column. The air pump is activated to inflate the airbag column, which makes the end of the cutting blade contact the inner wall of the steel pipe. At this time, the rust and dirt are on the side of the cutting blade away from the second fixed plate. The first electric slider is activated again, which makes the cutting blade move laterally and push the rust and dirt laterally, which can pull the rust and dirt out of the steel pipe.

[0022] S4: Simultaneously activate the third electric telescopic rod on the side of the first and second fixed plates, so that the grinding plate and anti-slip plate abut against the inner wall of the steel pipe, and fix the steel pipe against it. At this time, start the air pump to inflate the airbag column so that the end of the cutting blade contacts the inner wall of the steel pipe. The cutting position of the cutting blade can be adjusted by the first guide rail and the first electric slider, and the cutting angle of the cutting blade can be adjusted by the angle adjustment mechanism.

[0023] S5: After adjusting the cutting position and cutting angle of the cutting blade, start the second electric slider. The second electric slider drives the cutting blade to rotate inside the steel pipe to cut the steel pipe from the inside out.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. In this invention, the use of two inflatable airbag columns allows for simultaneous inflation of both columns, ensuring the cutting blade is perpendicular to the inner wall of the steel pipe for cutting. Alternatively, only one of the two airbag columns can be inflated. The expansion of the inflated airbag column tilts the mounting blade, allowing adjustment of the cutting angle of the blade. This adjustment results in a chamfered cut on the steel pipe. Furthermore, the combined use of the two airbag columns allows for different chamfer angles, enabling adjustment of the chamfer angle as needed, thus improving the ease of use of the device.

[0026] 2. This invention utilizes a cutting blade to cut the steel pipe from the inside out, allowing for complete collection of the waste generated during cutting. This prevents the waste from flying around and affecting the surrounding environment, and avoiding burns to workers, as is common in traditional steel pipe cutting methods. This improves the completeness and cleanliness of the cutting process. Furthermore, the noise generated during cutting is concentrated on the inner wall of the steel pipe, reducing noise levels. Additionally, the cutting blade effectively seals the fumes generated during cutting, requiring only vacuuming at both ends of the pipe for complete collection. This multi-benefit approach offers several advantages.

[0027] 3. In this invention, the output shaft of the motor drives the second fixed plate to rotate, causing the grinding plate to rotate and grind the inner wall of the steel pipe to remove rust, dust, and dirt. This polishes and removes rust and dirt from the inner wall of the steel pipe, ensuring the cleanliness of the inner wall when cutting the steel pipe. It also prevents rust and dirt on the inner wall of the steel pipe from affecting the accuracy of cutting. The grinding plate and anti-slip plate abut against the inner wall of the steel pipe, which fixes the mounting column inside the steel pipe. This provides support and fixation force to the steel pipe, preventing the mounting column from sliding inside the steel pipe, and completely fixing the steel pipe and the mounting column together.

[0028] 4. In this invention, the lateral movement of the cutting blade can move rust and dirt laterally, thereby moving the rust and dirt generated when the grinding plate polishes the inner wall of the steel pipe. The rust and dirt can be moved towards the first fixed plate until they are removed from the steel pipe. This allows for the movement and handling of rust and dirt generated when the grinding plate polishes the inner wall of the steel pipe, preventing the accumulation of rust and dirt on the inner wall of the steel pipe and affecting the subsequent cutting process. Attached Figure Description

[0029] Figure 1 This is a first-view structural schematic diagram of a multi-angle steel pipe cutting device proposed in this invention.

[0030] Figure 2 This is a second-view structural schematic diagram of a multi-angle steel pipe cutting device proposed in this invention.

[0031] Figure 3 This is a schematic diagram showing the connection between the first fixing plate and the connecting rod of a multi-angle steel pipe cutting device proposed in this invention.

[0032] Figure 4 This is a schematic diagram showing the connection between the mounting column and the first guide rail of a multi-angle steel pipe cutting device proposed in this invention.

[0033] Figure 5 This is a schematic diagram showing the connection between the first guide rail and the first electric slider of a multi-angle steel pipe cutting device proposed in this invention.

[0034] Figure 6 This is a schematic diagram showing the connection between the fixing plate and the grinding plate of a multi-angle steel pipe cutting device proposed in this invention.

[0035] Figure 7 This is a schematic diagram showing the connection between the fixing plate and the spring in a multi-angle steel pipe cutting device proposed in this invention.

[0036] Figure 8 This is a schematic diagram showing the connection between the first electric slider and the mounting ring of a multi-angle steel pipe cutting device proposed in this invention.

[0037] Figure 9 This is a schematic diagram showing the connection between the mounting ring and the second guide rail of a multi-angle steel pipe cutting device proposed in this invention.

[0038] In the diagram: 1. Base plate; 2. Mounting plate; 3. First electric telescopic rod; 4. Mounting disc; 5. Sliding rod; 6. Support plate; 7. Collection trough; 8. Connecting rod; 9. Mounting column; 10. First fixed disc; 11. Second fixed disc; 12. Support frame; 13. Top plate; 14. Second electric telescopic rod; 15. Extrusion plate; 16. Limiting seat; 17. First guide rail; 18. First electric slider; 19. Mounting ring; 20. Second guide rail; 21. Third electric telescopic rod; 22. Connecting disc; 23. Connecting rod; 24. Fixing plate; 25. Anti-slip plate; 26. Grinding plate; 27. Guide channel; 28. Spring; 29. ​​Limiting rod; 30. Mounting groove; 31. Motor; 32. Second electric slider; 33. Bearing plate; 34. Inflatable airbag column; 35. Connecting plate; 36. Mounting blade holder; 37. Cutting blade. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] Reference Figure 1-9A multi-angle steel pipe cutting device includes a base plate 1 and a mounting column 9. A first fixing plate 10 is fixedly installed at one end of the mounting column 9, and a second fixing plate 11 is rotatably installed at the other end of the mounting column 9. The outer walls of the first fixing plate 10 and the second fixing plate 11 are provided with an expansion mechanism that expands outward in a ring shape. The expansion mechanism on the outer wall of the first fixing plate 10 is provided with a fixing component for fixing the steel pipe, and the expansion mechanism on the outer wall of the second fixing plate 11 is provided with a cleaning component for cleaning the inner wall of the steel pipe.

[0041] A mounting plate 4 is connected to the base plate 1 via a telescopic mechanism. The side of the mounting plate 4 is connected to the first fixed plate 10 via several connecting rods 8.

[0042] An installation ring 19 is slidably disposed on the installation column 9. The installation ring 19 is located between the first fixed plate 10 and the second fixed plate 11. A bearing plate 33 is slidably disposed on the installation ring 19. A cutting blade 37 for cutting steel pipe is connected to the bearing plate 33 through an angle adjustment mechanism.

[0043] The base plate 1 is equipped with a fixing mechanism for fixing the steel pipe.

[0044] As a technical optimization of the present invention, the expansion mechanism includes a third electric telescopic rod 21 installed on the side of the first fixed plate 10 and the second fixed plate 11 that are far apart from each other. The outer walls of the first fixed plate 10 and the second fixed plate 11 are provided with a plurality of first mounting holes and second mounting holes. A spring 28 is installed in the first mounting hole, and a limit rod 29 is slidably installed in the second mounting hole. The ends of the spring 28 and the limit rod 29 are connected to a fixing plate 24. The bottom of the fixing plate 24 is hinged to the piston rod end of the third electric telescopic rod 21 through a connecting rod 23. The spring 28 and the limit rod 29 can provide guidance for the fixing plate 24, and when the piston rod of the third electric telescopic rod 21 extends, the fixing plate 24 can move closer to the first fixed plate 10 or the second fixed plate 11 under the pull of the restoring force of the spring 28.

[0045] As a technical optimization of the present invention, the fixing component includes an anti-slip plate 25, which is disposed on the fixing plate 24 on the outer wall of the first fixing plate 10. The cleaning component includes a grinding plate 26, which is disposed on the fixing plate 24 on the outer wall of the second fixing plate 11. The grinding plate 26 is generally in the shape of a right trapezoid, and a plurality of guide grooves 27 are provided on the grinding plate 26. The guide grooves 27 can facilitate the drainage of rust and dirt from the inner wall of the steel pipe that falls off the grinding plate 26.

[0046] As a technical optimization of the present invention, a mounting groove 30 is provided at one end of the mounting column 9 near the second fixed plate 11. A motor 31 is installed in the mounting groove 30. The output shaft of the motor 31 is connected to the second fixed plate 11. The motor 31 can easily drive the second fixed plate 11 to rotate.

[0047] As a technical optimization of the present invention, the piston rod end of the third electric telescopic rod 21 is connected to a connecting plate 22, and the end of the connecting rod 23 is hinged to the outer wall of the connecting plate 22. The connecting plate 22 facilitates the hinged connection between the connecting rod 23 and the piston rod end of the third electric telescopic rod 21.

[0048] As a technical optimization of the present invention, a first guide rail 17 is installed on the outer wall of the mounting column 9, a first electric slider 18 is slidably installed on the first guide rail 17, the inner wall of the mounting ring 19 is fixed on the first electric slider 18, the mounting column 9 and the mounting ring 19 are coaxial, and the mounting column 9 is located inside the mounting ring 19. A second guide rail 20 is provided on the outer wall of the mounting ring 19, a second electric slider 32 is slidably installed on the second guide rail 20, and a bearing plate 33 is installed on the second electric slider 32.

[0049] As a technical optimization of the present invention, the angle adjustment mechanism includes a connecting plate 35 hinged to the support plate 33. A mounting knife holder 36 is installed at the end of the connecting plate 35, and the cutting blade 37 is installed on the mounting knife holder 36. Two third mounting holes are symmetrically opened on the support plate 33, and the two third mounting holes are respectively located on both sides of the connecting plate 35. An inflatable airbag column 34 is installed in each of the two third mounting holes. The ends of the two inflatable airbag columns 34 are connected to the mounting knife holder 36. An air pump for inflating the inflatable airbag columns 34 is provided on the support plate 33. The inflation end of the air pump is connected to the inflatable airbag column 34 through a delivery air pipe. An exhaust port is opened on each of the two inflatable airbag columns 34, and an electronic exhaust valve is installed in each of the two exhaust ports. The mounting knife holder 36 can provide a mounting surface for the cutting blade 37. The air pump can easily inflate the inflatable airbag column 34. The exhaust port on the inflatable airbag column 34 and the electronic exhaust valve in the exhaust port can easily discharge the gas in the inflatable airbag column 34.

[0050] As a technical optimization of the present invention, the telescopic mechanism includes a mounting plate 2 installed on a base plate 1. A first electric telescopic rod 3 is installed on the side of the mounting plate 2. The piston rod end of the first electric telescopic rod 3 is connected to the mounting plate 4. One end of a connecting rod 8 is fixed to the side of a first fixed plate 10, and the other end of the connecting rod 8 is fixed to the side of the mounting plate 4. A sliding rod 5 is installed on the side of the mounting plate 4 away from the first fixed plate 10. A sliding hole is opened on the side of the mounting plate 2, and the sliding rod 5 is slidably installed in the sliding hole. A support plate 6 is provided between the mounting plate 2 and the base plate 1. A collection groove 7 is opened on the base plate 1. The first electric telescopic rod 3 can easily drive the mounting column 9 to move laterally. Through the cooperation of the sliding rod 5 and the sliding hole, the mounting column 9 can be guided during lateral movement, thereby improving the stability of the mounting column 9 during lateral movement.

[0051] As a technical optimization of the present invention, the fixing mechanism includes a support frame 12 installed on the base plate 1. The top of the support frame 12 is connected to a top plate 13. A second electric telescopic rod 14 is installed at the bottom of the top plate 13. The piston rod end of the second electric telescopic rod 14 is connected to a pressing plate 15. A limiting seat 16 for fixing the steel pipe is installed at the bottom of the pressing plate 15 and the top of the base plate 1. An arc-shaped groove is provided on the limiting seat 16. The mounting column 9 is located between the limiting seat 16 at the bottom of the pressing plate 15 and the limiting seat 16 at the top of the base plate 1. Through the cooperation of the second electric telescopic rod 14, the pressing plate 15 and the limiting seat 16, the steel pipe can be easily fixed. The arc-shaped groove on the limiting seat 16 can facilitate contact between the limiting seat 16 and the steel pipe and can provide a limit for the steel pipe.

[0052] The present invention discloses a cutting method for a multi-angle steel pipe cutting device, which includes the following steps:

[0053] S1: First, place the steel pipe to be cut between the limiting seat 16 at the bottom of the extrusion plate 15 and the limiting seat 16 at the top of the base plate 1. Start the second electric telescopic rod 14. The piston rod of the second electric telescopic rod 14 pushes the extrusion plate 15 and causes the limiting seat 16 at the bottom of the extrusion plate 15 to move down to extrude and fix the steel pipe.

[0054] S2: Start the first electric telescopic rod 3. The piston rod of the first electric telescopic rod 3 extends and pushes the mounting column 9 to move laterally and insert into the steel pipe. At the same time, start the third electric telescopic rod 21 on the side of the mounting column 9 near the second fixed plate 11. The piston rod of the third electric telescopic rod 21 retracts, causing several fixed plates 24 to expand outward until the grinding plate 26 contacts the inner wall of the steel pipe. At the same time, start the motor 31. The output shaft of the motor 31 drives the second fixed plate 11 to rotate, causing the grinding plate 26 to rotate and grind the inner wall of the steel pipe to remove rust, dust and dirt.

[0055] S3: The rust and dirt generated by the rotating grinding plate 26 grinding the inner wall of the steel pipe fall between the first fixed plate 10 and the second fixed plate 11 through the guide groove 27 on the grinding plate 26. The rust and dirt accumulate at the bottom of the inner wall of the steel pipe under its own weight. The first electric slider 18 is activated, which moves the cutting blade 37 toward the second fixed plate 11. The second electric slider 32 is activated, which makes the cutting blade 37 at the bottom of the outer wall of the mounting column 9. The air pump is activated to inflate the airbag column 34, which makes the end of the cutting blade 37 contact the inner wall of the steel pipe. At this time, the rust and dirt are on the side of the cutting blade 37 away from the second fixed plate 11. The first electric slider 18 is activated again, which makes the cutting blade 37 move laterally and move the rust and dirt laterally, which can remove the rust and dirt from the inside of the steel pipe.

[0056] S4: Simultaneously activate the third electric telescopic rod 21 on the side of the first fixed plate 10 and the second fixed plate 11, so that the grinding plate 26 and the anti-slip plate 25 abut against the inner wall of the steel pipe, and the steel pipe can be fixed in place. At this time, start the air pump to inflate the airbag column 34 so that the end of the cutting blade 37 contacts the inner wall of the steel pipe. The cutting position of the cutting blade 37 can be adjusted by the first guide rail 17 and the first electric slider 18, and the cutting angle of the cutting blade 37 can be adjusted by the angle adjustment mechanism.

[0057] S5: After adjusting the cutting position and cutting angle of the cutting blade 37, start the second electric slider 32. The second electric slider 32 drives the cutting blade 37 to rotate inside the steel pipe to cut the steel pipe from the inside out.

[0058] When using this invention, the steel pipe to be cut is first placed between the limiting seat 16 at the bottom of the extrusion plate 15 and the limiting seat 16 at the top of the base plate 1. The second electric telescopic rod 14 is then activated. The piston rod of the second electric telescopic rod 14 pushes the extrusion plate 15, causing the limiting seat 16 at the bottom of the extrusion plate 15 to move downwards until the steel pipe is extruded and fixed by the limiting seat 16 at the bottom of the extrusion plate 15 and the limiting seat 16 at the top of the base plate 1, thus pre-fixing the steel pipe.

[0059] After the steel pipe is fixed, the first electric telescopic rod 3 is activated. The piston rod of the first electric telescopic rod 3 extends and pushes the mounting plate 4 to move laterally. The lateral movement of the mounting plate 4 drives the connecting rod 8 and the mounting column 9 to move laterally until the mounting column 9 moves laterally and inserts into the steel pipe.

[0060] When the second fixing plate 11 at the end of the mounting column 9 moves laterally and inserts into the steel pipe, the third electric telescopic rod 21 on the side of the mounting column 9 closest to the second fixing plate 11 is activated. The piston rod of the third electric telescopic rod 21 retracts, causing the connecting rod 23 to gradually move towards a vertical position. When the connecting rod 23 moves towards a vertical position, the end of the connecting rod 23 pushes the fixing plate 24, causing the fixing plate 24 to move away from the second fixing plate 11. The movement of the fixing plate 24 away from the second fixing plate 11 pulls the spring 28 to extend and causes the limiting rod 29 to move into the second mounting hole. The sliding motion causes several fixed plates 24 to expand outwards. The outward expansion of the fixed plates 24 drives the grinding plate 26 to expand outwards until the grinding plate 26 contacts the inner wall of the steel pipe. At the same time, the motor 31 is started. The output shaft of the motor 31 drives the second fixed plate 11 to rotate, causing the grinding plate 26 to rotate and grind the inner wall of the steel pipe to remove rust, dust and dirt. This polishes and removes the rust and dirt from the inner wall of the steel pipe, ensuring the cleanliness of the inner wall of the steel pipe when cutting it, and preventing the rust and dirt on the inner wall of the steel pipe from affecting the accuracy of cutting the steel pipe.

[0061] Furthermore, the rust and dirt generated by the rotating grinding plate 26 grinding the inner wall of the steel pipe can fall into the guide groove 27 on the grinding plate 26. The rust and dirt falling into the guide groove 27 fall between the first fixed plate 10 and the second fixed plate 11 through the guide groove 27, and the fallen rust and dirt accumulate at the bottom of the inner wall of the steel pipe under their own gravity. At this time, the first electric slider 18 can be activated, and the first electric slider 18 slides on the first guide rail 17 to move closer to the second fixed plate 11, thereby driving the cutting blade 37 to move towards the second fixed plate 11 until the cutting blade 37 moves to the side of the second fixed plate 11 and stops. The second electric slider 32 is activated to slide on the second guide rail 20, thereby driving the cutting blade 37 to rotate around the mounting column 9, rotating the cutting blade 37 to the bottom position on the outer wall of the mounting column 9. The air pump is then activated to inflate the two airbag columns 34. Simultaneous inflation causes the two airbag columns 34 to expand, moving the cutting blade 37 away from the mounting column 9 until the end of the cutting blade 37 contacts the inner wall of the steel pipe. At this point, the rust and dirt are located between the cutting blade 37 and the first fixed plate 10. The first electric slider 18 is then activated again, causing the cutting blade 37 to move laterally. This lateral movement of the cutting blade 37 can move the rust and dirt laterally, thereby moving the rust and dirt generated when the grinding plate 26 polishes the inner wall of the steel pipe. The rust and dirt can be moved towards the first fixed plate 10 until they are removed from the steel pipe. This process of moving and handling the rust and dirt generated when the grinding plate 26 polishes the inner wall of the steel pipe prevents the rust and dirt generated during the polishing process from accumulating on the inner wall of the steel pipe and affecting the subsequent cutting process.

[0062] After the inner wall of the steel pipe is polished, the mounting column 9 drives the first fixing plate 10 and the second fixing plate 11 to fully enter the inner wall of the steel pipe. Once the mounting column 9 moves to the predetermined cutting position inside the steel pipe, the third electric telescopic rod 21 on the side of the first fixing plate 10 and the second fixing plate 11 is activated, causing the grinding plate 26 and the anti-slip plate 25 to abut against the inner wall of the steel pipe. This contact between the grinding plate 26 and the anti-slip plate 25 and the inner wall of the steel pipe fixes the mounting column 9 inside the steel pipe, providing support and preventing slippage. This completely secures the steel pipe and the mounting column 9. At this time, the air pump is activated to inflate the two airbag columns 34, causing them to expand and the end of the cutting blade 37 to contact the inner wall of the steel pipe. When used in conjunction with the other two inflatable airbag columns 34, both can be inflated simultaneously, causing the cutting blade 37 to be perpendicular to the inner wall of the steel pipe for cutting. Alternatively, only one of the two inflatable airbag columns 34 can be inflated. The expansion of the inflated airbag column 34 causes the mounting blade holder 36 to tilt, allowing adjustment of the cutting angle of the cutting blade 37. This allows for the creation of a chamfer at the cut edge of the steel pipe by adjusting the cutting angle of the two inflatable airbag columns 34. Furthermore, the combined use of the two inflatable airbag columns 34 allows for adjustment of the cutting angle of the cutting blade 37, resulting in different chamfer angles when cutting the steel pipe. This allows for adjustment as needed, improving the ease of use of the device.

[0063] After the cutting angle of the cutting blade 37 is adjusted, the cutting position of the cutting blade 37 can be adjusted by the cooperation of the first guide rail 17 and the first electric slider 18. This makes it easy to adjust the cutting position of the cutting blade 37 according to actual needs, thereby adjusting the cutting position of the steel pipe.

[0064] After adjusting the cutting position and angle of the cutting blade 37, the second electric slider 32 is activated. The second electric slider 32 rotates around the mounting column 9 on the second guide rail 20, thereby driving the cutting blade 37 to rotate around the mounting column 9 to cut the steel pipe from the inside out. This cutting process, using the cutting blade 37 to cut the steel pipe from the inside out, allows molten iron filings and burrs generated by friction and heating during the cutting process to be produced from the inside out. The cutting process proceeds from the inside out, producing molten iron filings and burrs. These burrs are formed from the inside out by the cutting blade 37, preventing them from rolling up towards the inner wall of the steel pipe. Instead, they roll outwards, allowing the molten iron filings and burrs to roll from the inside to the outside of the steel pipe. This facilitates subsequent polishing of these molten iron filings and burrs, avoiding the traditional method of cutting from the outside in. The molten iron filings and burrs generated during cutting are rolled up to the inner wall of the steel pipe and are difficult to clean. Furthermore, using the cutting blade 37 to cut the steel pipe from the inside out allows for complete collection of the waste generated during cutting. This avoids the waste flying around and affecting the surrounding environment and potentially burning workers, as is common with traditional steel pipe cutting methods. This improves the completeness and cleanliness of the cutting process. Additionally, the noise generated during cutting is concentrated on the inner wall of the steel pipe, reducing noise levels. Moreover, the cutting blade 37 effectively seals the fumes generated during cutting, trapping them inside the pipe. Only vacuuming at both ends of the pipe is needed to completely collect the fumes, achieving multiple benefits in one step.

[0065] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-angle cutting device for steel pipes, comprising a base plate (1) and a mounting column (9), characterized in that, The mounting column (9) is fixedly provided with a first fixing disc (10) at one end, and rotatably provided with a second fixing disc (11) at the other end. The outer wall of the first fixing disc (10) and the second fixing disc (11) is provided with an expansion mechanism expanding outward in a ring shape. The expansion mechanism of the outer wall of the first fixing disc (10) is provided with a fixing assembly for fixing the steel pipe. The expansion mechanism of the outer wall of the second fixing disc (11) is provided with a cleaning assembly for cleaning the inner wall of the steel pipe. The bottom plate (1) is connected with a mounting disc (4) through a telescopic mechanism. The mounting disc (4) is connected with the first fixing disc (10) through a plurality of connecting rods (8). The mounting column (9) is slidably provided with a mounting ring (19) between the first fixing disc (10) and the second fixing disc (11). The mounting ring (19) is slidably provided with a bearing plate (33). The bearing plate (33) is connected with a cutting blade (37) for cutting the steel pipe through an angle adjusting mechanism. The bottom plate (1) is provided with a fixing mechanism for fixing the steel pipe. The expansion mechanism comprises a third electric telescopic rod (21) mounted on the side of the first fixing disc (10) and the second fixing disc (11) away from each other. The outer wall of the first fixing disc (10) and the second fixing disc (11) is provided with a plurality of first mounting holes and second mounting holes. The first mounting hole is provided with a spring (28). The second mounting hole is slidably provided with a limiting rod (29). The end of the spring (28) and the limiting rod (29) is connected with a fixing plate (24). The bottom of the fixing plate (24) is hingedly connected with the piston rod end of the third electric telescopic rod (21) through a connecting rod (23). The fixing assembly comprises a non-slip plate (25) provided on the fixing plate (24) of the outer wall of the first fixing disc (10). The cleaning assembly comprises a polishing plate (26) provided on the fixing plate (24) of the outer wall of the second fixing disc (11). The polishing plate (26) is in the shape of a right trapezoid. A plurality of flow guide grooves (27) are formed in the polishing plate (26). The mounting column (9) is provided with a mounting groove (30) at one end close to the second fixing disc (11). The mounting groove (30) is provided with a motor (31). The output shaft of the motor (31) is connected with the second fixing disc (11). The piston rod end of the third electric telescopic rod (21) is connected with a connecting disc (22). The end of the connecting rod (23) is hingedly connected with the outer wall of the connecting disc (22). The outer wall of the mounting column (9) is provided with a first guide rail (17). The first guide rail (17) is slidably provided with a first electric sliding block (18). The inner wall of the mounting ring (19) is fixed on the first electric sliding block (18). The mounting column (9) and the mounting ring (19) are coaxial. The mounting column (9) is located in the mounting ring (19). The outer wall of the mounting ring (19) is provided with a second guide rail (20). The second guide rail (20) is slidably provided with a second electric sliding block (32). The bearing plate (33) is mounted on the second electric sliding block (32). The angle adjusting mechanism comprises a connecting plate (35) hinged on a bearing plate (33), an installation cutter seat (36) is mounted at the end of the connecting plate (35), a cutting blade (37) is mounted on the installation cutter seat (36), two third mounting holes are symmetrically formed on the bearing plate (33) and are located on the two sides of the connecting plate (35), an inflatable air bag column (34) is mounted in each of the third mounting holes, the ends of the two inflatable air bag columns (34) are connected with the installation cutter seat (36), an inflation pump for inflating the inflatable air bag column (34) is arranged on the bearing plate (33), the inflation end of the inflation pump is connected with the inflatable air bag column (34) through a conveying air pipe, and an electronic exhaust valve is mounted in each of the two exhaust ports.

2. A multi-angle cutting device for steel pipes according to claim 1, characterized in that, The telescopic mechanism comprises a mounting plate (2) mounted on a bottom plate (1), a first electric telescopic rod (3) is mounted on the side of the mounting plate (2), the piston rod tail end of the first electric telescopic rod (3) is connected with a mounting disc (4), a connecting rod (8) is fixed on the side of a first fixed disc (10) at one end and is fixed on the side of the mounting disc (4) at the other end, a sliding rod (5) is mounted on the side of the mounting disc (4) away from the first fixed disc (10), a sliding hole is formed in the side of the mounting plate (2), and the sliding rod (5) is slidingly mounted in the sliding hole; a support plate (6) is arranged between the mounting plate (2) and the bottom plate (1), and a collecting groove (7) is formed in the bottom plate (1).

3. A multi-angle cutting device for steel pipes according to claim 1, characterized in that, The fixing mechanism comprises a support frame (12) mounted on the bottom plate (1), a top plate (13) connected with the top end of the support frame (12), a second electric telescopic rod (14) mounted on the bottom of the top plate (13), an extrusion plate (15) connected with the piston rod tail end of the second electric telescopic rod (14), a limiting seat (16) for fixing the steel pipe mounted on the bottom of the extrusion plate (15) and the top of the bottom plate (1), an arc-shaped groove formed in the limiting seat (16), and an installation column (9) located between the limiting seat (16) on the bottom of the extrusion plate (15) and the limiting seat (16) on the top of the bottom plate (1).

4. A method of cutting a steel pipe at multiple angles according to any one of claims 1 to 3, wherein The cutting method comprises the following steps: S1: first, place the steel pipe to be cut between the limiting seat (16) on the bottom of the extrusion plate (15) and the limiting seat (16) on the top of the bottom plate (1), start the second electric telescopic rod (14), the piston rod of the second electric telescopic rod (14) pushes the extrusion plate (15) to drive the limiting seat (16) on the bottom of the extrusion plate (15) to move downward to extrude and fix the steel pipe, and the steel pipe can be fixed; S2: Start the first electric telescopic rod (3), the piston rod of the first electric telescopic rod (3) extends to push the installation column (9) to move transversely and insert into the steel pipe, and start the third electric telescopic rod (21) close to the second fixed disc (11) side of the installation column (9), the piston rod of the third electric telescopic rod (21) retracts to make several fixed plates (24) expand outward, until the polishing plate (26) is in contact with the inner wall of the steel pipe, and start the motor (31), the output shaft of the motor (31) drives the second fixed disc (11) to rotate to make the polishing plate (26) rotate to polish the inner wall of the steel pipe to remove rust, dirt and stains; S3: The rust and dirt generated by the polishing plate (26) rotating to polish the inner wall of the steel pipe fall between the first fixed disc (10) and the second fixed disc (11) through the flow guide groove (27) on the polishing plate (26), and the rust and dirt gather at the bottom end of the inner wall of the steel pipe under their own gravity, start the first electric sliding block (18), so that the cutting blade (37) moves to the second fixed disc (11), start the second electric sliding block (32) to make the cutting blade (37) at the bottom end of the outer wall of the installation column (9), start the air pump to inflate the inflatable air bag column (34) to make the end of the cutting blade (37) contact with the inner wall of the steel pipe, at this time, the rust and dirt are on the side of the cutting blade (37) away from the second fixed disc (11), start the first electric sliding block (18) again, so that the cutting blade (37) moves transversely to move the rust and dirt transversely, which can be pushed out from the steel pipe; S4: Start the third electric telescopic rod (21) on the side of the first fixed disc (10) and the second fixed disc (11) to make the polishing plate (26) and the anti-skid plate (25) abut with the inner wall of the steel pipe, which can abut and fix the steel pipe, at this time, start the air pump to inflate the inflatable air bag column (34) to make the end of the cutting blade (37) contact with the inner wall of the steel pipe, the cutting position of the cutting blade (37) can be adjusted through the first guide rail (17) and the first electric sliding block (18), and the cutting angle of the cutting blade (37) can be adjusted through the angle adjusting mechanism; S5: After adjusting the cutting position and cutting angle of the cutting blade (37), start the second electric sliding block (32), the second electric sliding block (32) drives the cutting blade (37) to rotate in the steel pipe to cut the steel pipe from the inside to the outside.

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