A laser cutting apparatus for large tubes

Abstract

The application relates to a laser cutting device for large pipes, comprising a supporting transportation device and an internal hollow rotating cutting device, the supporting transportation device is used for supporting the pipes and enabling the pipes to run along the length direction of the supporting transportation device, the rotating cutting device is assembled on the supporting transportation device, the rotating cutting device comprises a cutting track with a partial annular shape and a laser cutting device, the cutting track is coaxial with the pipes, the laser cutting device is configured to move along the cutting track and circumferentially cut the pipes, the laser cutting device comprises two laser generators which are arranged perpendicularly to each other, the laser cutting device is arranged at the midpoint of the chord of the cutting track, so that the light beams emitted by the laser generators can be vertically shot on the surface of the pipes, by controlling the rotation of the laser cutting device instead of the conventional driving mode of rotating the pipes, the pipes can be controlled more finely during cutting, and the energy consumption is lower.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe cutting, in particular to a laser cutting device for large pipes. BACKGROUND

[0002] The core component of a laser cutting machine is a laser generator, which can generate a high-energy, high-directional laser beam. The laser beam is focused on the material surface through an optical system to form a high-energy density focal point. When the laser beam irradiates the material surface, the material absorbs the laser energy and rapidly heats up to a melting or vaporization temperature. For metal materials, the laser energy will cause the metal to melt and evaporate, forming a cutting gap. During the cutting process, an auxiliary gas is usually blown into the cutting area.

[0003] When using a laser cutting knife to cut a pipe, the pipe is usually pushed to the cutting area by a clamping device, and the pipe is rotated circumferentially by a rotating structure, so that the laser cutting is circumferential along the surface of the pipe.

[0004] When cutting a large pipe using the above cutting method, the pipe is large in size and heavy in weight, and more power is required to control the rotation of the pipe, which consumes more electricity and energy, and reduces economic benefits. SUMMARY

[0005] The present application provides a laser cutting device for large pipes, which can solve the problem of excessive energy consumption and low economic benefits when cutting large pipes.

[0006] The technical solution of the present application is as follows: a laser cutting device for large pipes, comprising:

[0007] A support transport device is used to support the pipe and make the pipe walk along the length direction of the support transport device;

[0008] An internal hollow rotating cutting device is assembled on the support transport device, the rotating cutting device comprises a cutting track with a partial ring shape and a laser cutting device, the cutting track is coaxial with the pipe, the laser cutting device is configured to move along the cutting track and cut the pipe circumferentially, the laser cutting device comprises two lasers perpendicular to each other, and the laser cutting device is arranged at the midpoint of the chord of the cutting track, so that the light beam emitted by the laser generator can be perpendicular to the surface of the pipe.

[0009] By adopting the above scheme, by assembling the laser cutting equipment on the annular cutting track, using the supporting transportation device to carry the pipe along its axial movement, when moving to the position to be cut, the laser cutting equipment will rotate along the cutting track, since the laser cutting equipment is arranged as two mutually perpendicular, the device can simultaneously drive two laser cutting equipment to rotate around the pipe, that is, a smaller amplitude can be rotated, and the pipe can be cut in all directions, compared with rotating the pipe by 360°, the energy consumption of rotating the laser cutting equipment by a small amplitude is smaller, and the cutting efficiency is higher, and the cutting speed of the device to the pipe can be more accurately controlled, in addition, by arranging the laser cutting equipment at the midpoint of the chord of the cutting track coaxial with the pipe, the laser beam emitted by the laser cutting equipment is always perpendicular to the surface of the pipe during rotation, so that the laser heat is more concentrated, so that the cutting seam is more regular, and the energy utilization rate is higher.

[0010] In an embodiment of the present application, the rotating cutting device further comprises:

[0011] A hollow frame is assembled on the supporting transportation device, the cutting track is assembled on the inner wall of the hollow frame, a rectangular opening is formed on one side of the outer wall of the hollow frame, and a glass plate is assembled at the rectangular opening;

[0012] An L-shaped frame is assembled on the inner wall of the cutting track, the L-shaped frame comprises two mutually perpendicular vertical segments and a horizontal segment, the lengths of the vertical segments and the horizontal segment are equal to the chord length of the circle where the cutting track is located, and two laser cutting equipment are respectively assembled at the midpoints of the vertical segments and the horizontal segment;

[0013] A walking driving device comprises a driving gear and a driving motor, the driving gear is rotatably assembled at the connection between the vertical segment and the horizontal segment through a rotating shaft, the driving motor is assembled on one side of the L-shaped frame, the driving shaft of the driving motor is coaxially connected and fixed with the rotating shaft, the ends of the vertical segment and the horizontal segment away from each other are respectively rotatably connected with driven gears, and the inner wall of the cutting track is provided with a tooth groove, the tooth groove is engaged with the driving gear and the driven gear.

[0014] By adopting the above scheme, by setting the L-shaped frame as the chord of the annular cutting track, the laser cutting equipment can be assembled in the middle of the L-shaped frame, so that the laser beam emitted by the laser cutting equipment can always be perpendicular to the surface of the pipe when rotating along the cutting track, so that the laser heat is more concentrated, so that the cutting seam is more regular, and the energy utilization rate is higher;

[0015] In addition, the driving motor drives the driving gear to rotate, the driving gear can rotate along the tooth groove of the cutting track, and the whole L-shaped frame can rotate along the cutting track through the meshing between the driving gear and the tooth groove, so that the two laser cutting devices are driven to rotate at the same time, and precise cutting of the pipe surface is realized.

[0016] In one of the embodiments of the present application, the vertical section and the horizontal section are internally provided with a sandwich layer, the vertical section and the horizontal section are both provided with a rectangular placement groove at the midpoint of the sandwich layer, the rectangular placement groove is internally provided with a rubber layer, the two laser cutting devices are respectively assembled on the rubber layer, the driving gear is assembled in the sandwich layer, the driving shaft of the driving motor penetrates through one side of the L-shaped frame and is coaxially connected and fixed with the driving gear, and the vertical section and the horizontal section are provided with a plurality of limiting pieces at the sandwich layer, and the plurality of limiting pieces are respectively and one-to-one correspondingly located on one side of the driving gear or the driven gear.

[0017] By adopting the above scheme, the L-shaped frame is internally provided with a sandwich layer, and the laser cutting devices are assembled on the rubber layer in the sandwich layer, so that the assembly stability of the laser cutting devices is ensured, the rubber layer can effectively absorb the vibration generated by the laser cutting devices during cutting, and the noise generated by the device during cutting of the pipe is reduced.

[0018] In one of the embodiments of the present application, the limiting piece comprises:

[0019] The fixing seat internally provided with a spherical cavity, the fixing seat is provided with two, two The fixing seat is oppositely assembled on the inner wall of the sandwich layer of the L-shaped frame;

[0020] The ball is arranged in the spherical cavity, one end of the ball protrudes from the spherical cavity and abuts against both sides of the cutting track.

[0021] By adopting the above scheme, by arranging the limiting piece, when the L-shaped frame is assembled on the cutting track, the limiting pieces on both sides of the L-shaped frame can abut against both sides of the cutting track, so that the L-shaped frame can be placed on the cutting track and kept stable, and at the same time, the ball rotates itself when the L-shaped frame rotates, and the rolling friction is used instead of sliding friction, so that the frictional resistance of the L-shaped frame rotating on the cutting track is reduced.

[0022] In one of the embodiments of the present application, the cutting track is provided with a notch on one side, and the angle a of the notch satisfies 0≤a≤90°.

[0023] By adopting the above solution, by opening a notch on the cutting track and ensuring that the cutting track has an arc of at least 270°, the laser cutting equipment set on the L-shaped frame can achieve 360° all-round cutting of the pipe through circumferential movement in two directions, with a smaller movement stroke and higher cutting efficiency. At the same time, setting a notch on the cutting track can also facilitate the pipe to be pulled out sideways from the notch of the cutting track.

[0024] In one embodiment of the present application, the cutting track is provided with partially circular sound-absorbing cotton strips on both sides close to the inner circle, and the balls and the sound-absorbing cotton strips are in conflict with each other.

[0025] By adopting the above solution, sound-absorbing cotton strips are arranged on the cutting track, so that the ball can roll on the sound-absorbing cotton strips. At the same time, the cotton strips can effectively absorb the vibration generated by the laser cutting equipment when cutting the pipe, thereby reducing the noise pollution generated by the laser cutting equipment during cutting.

[0026] In one embodiment of the present application, two supporting and transporting devices are provided, one located on each side of the rotary cutting device, and the supporting and transporting devices include:

[0027] A support frame, the support frame is arranged on one side of the hollow frame, one end of the support frame extends into the interior of the hollow frame and is located on one side of the cutting track;

[0028] A roller assembly is provided, wherein a plurality of roller assemblies are installed at intervals along the length direction of the support frame at the upper end of the support frame. The roller assembly includes: a roller frame and a roller. The roller frame is installed at the upper end of the support frame, and the roller is rotatably installed on the roller frame.

[0029] By adopting the above scheme, a plurality of rollers are arranged at intervals along the length direction of the support frame, so that the pipe to be cut can be placed on the plurality of rollers. While the position of the pipe is limited, the pipe can keep feeding under the rotation of the roller. When the pipe is moving, the resistance it encounters is rolling friction, which is smaller than the sliding friction resistance, thereby making the pipe more convenient to move, ensuring that the pipe is fed more continuously during cutting, and improving the working efficiency of the pipe.

[0030] In one embodiment of the present application, the supporting and transporting device also includes a driving wheel assembly, and the driving wheel assembly includes a driving frame and a servo motor. The driving frame is mounted on one end of the supporting frame, and a rotating shaft is rotatably mounted in the driving frame. The roller is coaxially sleeved on the rotating shaft, and one end of the rotating shaft protrudes from the driving frame. The servo motor is mounted below the supporting frame, and a transmission belt is sleeved between the driving shaft of the servo motor and one end of the rotating shaft.

[0031] By setting up a servo motor, the servo motor rotates to drive the belt to rotate, and the belt drives the rotating shaft to rotate, and the roller connected to the rotating shaft rotates. The roller uses friction as power, so that the pipe can keep feeding along the length direction of the support frame.

[0032] In one embodiment of the present application, the support frame is further equipped with a clamping mechanism, and the clamping mechanism includes:

[0033] A support column, wherein the support column is fixedly assembled on the support frame along the vertical direction;

[0034] An L-shaped height limit frame has a cylindrical cavity at one end of the L-shaped height limit frame, and the L-shaped height limit frame is sleeved on the support column. An elastic member is provided inside the cylindrical cavity, and both ends of the elastic member are respectively connected and fixed to the support column and the L-shaped height limit frame. The other end of the L-shaped height limit frame is fixedly connected to a connecting frame close to the side of the support frame, and the roller is rotatably assembled inside the connecting frame.

[0035] By adopting the above solution, the L-shaped height limit frame is set above the pipe. According to the diameter of the pipe, the height of the L-shaped height limit frame is raised so that the L-shaped height limit frame can be buckled above the pipe. The elastic force of the elastic member pulls the L-shaped height limit frame, which can provide a certain downward pressure on the pipe, making the pipe more stable when placed. At the same time, the rollers arranged below the L-shaped height limit frame can reduce the friction resistance between the pipe and the L-shaped height limit frame during feeding.

[0036] In one embodiment of the present application, the roller includes:

[0037] Conical wheels, two of which are arranged opposite to each other, each having a cylindrical threaded cavity formed therein;

[0038] The rotating tube is provided with a thread on the outside, and the conical wheel is sleeved on the outside of the rotating tube and is threadedly connected to the rotating tube.

[0039] By adopting the above solution, the tapered wheels are connected to the outside of the rotating tube with threads at opposite positions, so that the position between the two tapered wheels can be adjusted according to the actual diameter of the tube, so that the tube can be better limited.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. By placing the pipe on the supporting transport device, the pipe can move along the supporting transport device, and at the same time setting a rotatable laser cutting device, the laser cutting device can rotate around the surface of the pipe. Compared with the method of directly driving the pipe to rotate, driving the laser cutting device with smaller volume and weight can greatly reduce energy loss. During laser cutting, the cutting speed can also be controlled more accurately, thereby improving the cutting accuracy.

[0042] 2. By placing the L-shaped frame at the chord of the circular cutting track and limiting the length of the L-shaped frame and the assembly position of the laser cutting equipment, according to basic geometric theorems, when the laser cutting equipment rotates around the surface of the pipe and cuts the pipe, since the pipe and the cutting track are coaxial, the laser cutting equipment always emits the laser in the radial direction of the cutting track. When the laser beam hits the surface of the pipe, the beam hits the pipe surface vertically, thereby improving the energy utilization of the laser beam, ensuring the regularity of the cut seam, and reducing the noise generated during cutting.

[0043] 3. By providing stoppers on both sides of the inner wall of the interlayer of the L-shaped frame, when the L-shaped frame is assembled on the cutting track, the cutting track is embedded in the interlayer of the L-shaped frame, and the stoppers on both sides of the inner wall of the interlayer are used to support the cutting track. The ball bearings can roll along the cutting track, thereby enabling the L-shaped frame to move along the cutting track while reducing the resistance encountered during movement.

[0044] 4. By setting a notch on one side of the cutting track and setting up two mutually perpendicular laser cutting devices, when the device uses the laser cutting equipment to cut the pipe, it can drive the L-shaped frame walking part to a smaller arc, so that the pipe can be cut 360° in all directions, which improves the cutting efficiency while reducing material and energy loss, further improving economic benefits.

[0045] 5. By setting up a conical wheel with adjustable spacing, when the pipe is placed on the conical wheel, the device can adjust the spacing according to the diameter of the pipe, making the pipe more stable when placed. In addition, the L-shaped height limit frame is used to press down the upper part of the pipe, and one end of the placed pipe is tilted, ensuring that the pipe can move along the length direction of the support frame while improving the stability of the pipe feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a front view of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0047] Figure 2 This is a front cross-sectional view of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0048] Figure 3 This is a front view of an L-shaped frame of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0049] Figure 4 This is a front view of a support and transportation device for laser cutting equipment for large pipes provided in the first embodiment of the present application;

[0050] Figure 5 This is a front cross-sectional view of a cutting track of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0051] Figure 6 This is an exploded front view of an L-shaped frame of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0052] Figure 7 This is a front view of a sound-absorbing cotton strip for laser cutting equipment for large pipes provided in the second embodiment of the present application;

[0053] Figure 8 This is a side sectional view of an L-shaped height limit frame of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0054] Figure 9 This is a side sectional view of a conical wheel of a laser cutting device for large pipes provided in the first embodiment of the present application;

[0055] Figure 10 This is a front view of a conical wheel of a laser cutting device for large pipes provided in the first embodiment of the present application.

[0056] Explanation of reference numerals: 1. Support and transport device; 11. Support frame; 12. Roller assembly; 121. Roller frame; 122. Roller; 1221. Conical wheel; 1222. Rotating tube; 13. Driving wheel assembly; 131. Driving frame; 132. Servo motor; 133. Rotating shaft; 134. Transmission belt; 14. Clamping mechanism; 141. Support column; 142. L-shaped height limit frame; 1421. Columnar cavity; 143. Elastic member; 144. Connecting frame; 2. Rotary cutting equipment ; 21. Cutting track; 211. Tooth groove; 212. Notch; 213. Sound-absorbing cotton strip; 22. Laser cutting equipment; 23. Hollow frame; 231. Glass plate; 24. L-shaped frame; 241. Vertical section; 242. Horizontal section; 243. Interlayer; 244. Rubber layer; 25. Travel drive device; 251. Drive gear; 252. Drive motor; 253. Rotating shaft; 254. Driven gear; 26. Limiting piece; 261. Fixed seat; 262. Ball bearing; 3. Pipe. DETAILED DESCRIPTION

[0057] The following description will be made in conjunction with the accompanying drawings Figures 1-10 A laser cutting device for large pipes is provided.

[0058] Embodiment 1, please refer to Figure 1 、 Figure 2 and Figure 3 A laser cutting device for large pipes is provided in the embodiments of the present application, which comprises a supporting and transporting device 1 and a rotating cutting device 2. The supporting and transporting device 1 is used to support the pipe 3 and make the pipe 3 walk along the length direction of the supporting and transporting device 1. The rotating cutting device 2 is hollow inside. The rotating cutting device 2 is assembled on the supporting and transporting device. The rotating cutting device 2 comprises a cutting track 21 with a partial annular shape and a laser cutting device 22. The cutting track 21 is coaxial with the pipe 3. The laser cutting device 22 is configured to move along the cutting track 21 and cut the pipe 3 circumferentially. The laser cutting device 22 comprises two laser generators which are arranged perpendicularly to each other. The laser cutting device 22 is arranged at the midpoint of the chord of the cutting track 21, so that the light beam emitted by the laser generator can be perpendicular to the surface of the pipe 3. By driving the L-shaped frame 24 to rotate around the pipe 3 and driving the laser cutting device 22 to rotate, the laser cutting device 22 can always be perpendicular to the surface of the pipe 3. Compared with the rotating pipe 1222, the small-amplitude rotation of the laser cutting device 22 can save energy and improve the cutting efficiency. Meanwhile, the cutting speed of the device can be controlled more accurately. The laser beam is always perpendicular to the surface of the pipe 3, which makes the cutting seam more regular and the cutting efficiency higher.

[0059] Please refer to Figure 2 、 Figure 3 and Figure 5, the rotary cutting equipment 2 also includes: a hollow frame 23, an L-shaped frame 24 and a walking drive device 25, the hollow frame 23 is assembled on the supporting and transporting device 1, the cutting track 21 is assembled on the inner wall of the hollow frame 23, a rectangular opening is opened on one side of the outer side of the hollow frame 23, and a glass plate 231 is assembled at the rectangular opening, the L-shaped frame 24 is assembled on the inner wall of the cutting track 21, the L-shaped frame 24 includes two mutually perpendicular vertical sections 241 and a horizontal section 242, the lengths of the vertical section 241 and the horizontal section 242 are equal to the chord length of the circle where the cutting track 21 is located, the two laser cutting equipment 22 are respectively assembled at the midpoints of the vertical section 241 and the horizontal section 242, the walking drive device 25 includes a driving gear 251 and a driving motor 252, the driving gear 251 is rotated by a rotating shaft 253 and is assembled on the vertical section 241 and the horizontal section At the connection of the horizontal section 242, the drive motor 252 is assembled on one side of the L-shaped frame 24, and the drive shaft of the drive motor 252 is coaxially connected and fixed with the rotating shaft 253. The ends of the vertical section 241 and the horizontal section 242 that are away from each other are respectively rotatably connected with a driven gear 254. A tooth groove 211 is provided on the inner wall of the cutting track 21, and the tooth groove 211 is engaged with the drive gear 251 and the driven gear 254. By assembling the laser cutting equipment 22 in the middle part of the L-shaped frame 24, when the laser cutting equipment 22 rotates along the cutting track 21, the laser beam emitted can always be perpendicular to the surface of the pipe 3, so that the laser heat is more concentrated, so that when cutting the pipe 3, the cutting seam is more regular and the energy utilization rate is higher. At the same time, the drive motor 252 drives the L-shaped frame 24. Compared with driving the pipe 3, the required energy consumption is greatly reduced, thereby improving economic benefits.

[0060] See also Figure 3 and Figure 6The vertical section 241 and the horizontal section 242 are provided with an interlayer 243. The vertical section 241 and the horizontal section 242 are provided with a rectangular placement groove at the midpoint of the interlayer 243. A rubber layer 244 is provided inside the rectangular placement groove. The two laser cutting devices 22 are respectively mounted on the rubber layer 244. The driving gear 251 is mounted in the interlayer 243. The driving shaft of the driving motor 252 passes through one side of the L-shaped frame 24 and is coaxially connected and fixed to the driving gear 251. The vertical section 241 and the horizontal section 242 are provided with multiple sets of limit members 26 at the interlayer 243. The multiple sets of limit members 26 are respectively located on one side of the driving gear 251 or the driven gear 254 in a one-to-one correspondence. By assembling the laser cutting equipment 22 on the rubber layer 244 in the interlayer 243, the assembly stability of the laser cutting equipment 22 is ensured. The rubber layer 244 can also be used to absorb the vibration generated by the laser cutting equipment 22 during cutting, thereby reducing the noise generated by the device when cutting the pipe 3.

[0061] See also Figure 6 The limiting member 26 includes: a fixing seat 261 and a ball 262. A spherical cavity is provided inside the fixing seat 261. There are two fixing seats 261. The two fixing seats 261 are relatively assembled on the inner wall of the interlayer 243 of the L-shaped frame 24. The ball 262 is arranged in the spherical cavity. One end of the ball 262 protrudes from the spherical cavity and conflicts with the two sides of the cutting track 21. By setting the limiting member 26, the L-shaped frame 24 can be stably assembled on the cutting track 21 so that it will not deflect. At the same time, the ball 262 can effectively reduce the resistance encountered by the L-shaped frame 24 when it moves along the cutting track 21.

[0062] See also Figure 5 A notch 212 is provided on one side of the cutting track 21, and the angle a of the notch 212 satisfies 0≤a≤90°. By providing the notch 212 on one side of the cutting track 21, the pipe 3 can be unloaded from the notch 212, so that the device has a variety of unloading methods. At the same time, the notch 212 can also cooperate with the two laser cutting devices 22 on the L-shaped frame 24, so that the laser cutting device 22 can perform 360° cutting around the pipe 3.

[0063] Example 2: The structure of Example 2 is basically the same as that of Example 1, except that:

[0064] See also Figure 7The cutting track 21 is provided with partially circular sound-absorbing cotton strips 213 on both sides close to the inner circle. The ball 262 conflicts with the sound-absorbing cotton strips 213. When the ball 262 moves on the cutting track 21, it can conflict with the suction cotton strips. Therefore, on the basis of not hindering the walking function of the L-shaped frame 24, the noise generated by the laser cutting equipment 22 during cutting is reduced through the absorption effect of the noise-absorbing cotton strips 213.

[0065] See also Figure 4 , the supporting and transporting device 1 is provided with two, respectively located on both sides of the rotary cutting equipment 2, the supporting and transporting device 1 comprises: a support frame 11 and a roller assembly 12, the support frame 11 is arranged on one side of the hollow frame 23, one end of the support frame 11 extends to the interior of the hollow frame 23 and is located on one side of the cutting track 21, the roller assembly 12 is provided with a plurality of, a plurality of roller assemblies 12 are assembled at the upper end of the support frame 11 at intervals along the length direction of the support frame 11, the roller assembly 12 comprises: a roller frame 121 and a roller 122, the roller frame 121 is assembled at the upper end of the support frame 11, the roller 122 is rotatably assembled on the roller frame 121, and the track composed of a plurality of rollers 122 is used to limit the position of the pipe 3 while the pipe 3 can keep feeding under the rotation of the roller 122. Compared with the sliding friction resistance, the pipe 3 is subjected to less resistance, which makes it more convenient for the pipe 3 to walk.

[0066] Among them, the support frame 11 can be adjusted in height. By setting an adjustable base with adjustable height under the support frame 11, the height of the entire support frame 11 can be adjusted. Among them, the assembly method of the height-adjusting base is a conventional technical means for technical personnel in this field, so it will not be repeated again.

[0067] Please continue reading Figure 4 The supporting and transporting device 1 also includes a driving wheel assembly 13, which includes a driving frame 131 and a servo motor 132. The driving frame 131 is assembled on one end of the supporting frame 11, and a rotating shaft 133 is rotatably assembled in the driving frame 131. The roller 122 is coaxially sleeved on the rotating shaft 133, and one end of the rotating shaft 133 protrudes from the driving frame 131. The servo motor 132 is assembled below the supporting frame 11, and a transmission belt 134 is sleeved between the driving shaft of the servo motor 132 and one end of the rotating shaft 133. By setting a roller 122 connected to the servo motor 132 for transmission, the roller 122 uses friction as power, so that the pipe 3 can keep feeding along the length direction of the supporting frame 11.

[0068] See also Figure 1 and Figure 8The supporting frame 11 is further provided with a clamping mechanism 14, which comprises a supporting column 141 and an L-shaped height limiting frame 142. The supporting column 141 is fixedly arranged on the supporting frame 11 in the vertical direction. The L-shaped height limiting frame 142 is provided with a columnar cavity 1421 at one end. The L-shaped height limiting frame 142 is sleeved on the supporting column 141. An elastic member 143 is arranged in the columnar cavity 1421. The two ends of the elastic member 143 are fixedly connected with the supporting column 141 and the L-shaped height limiting frame 142, respectively. The other end of the L-shaped height limiting frame 142 is fixedly connected with a connecting frame 144 near one side of the supporting frame 11. The connecting frame 144 is rotatably provided with the roller 122. The L-shaped height limiting frame 142 can be buckled above the pipe 3. The elastic member 143 provides a certain downward pressure on the pipe 3, so that the pipe 3 is more stable when placed.

[0069] In this embodiment, the elastic member 143 can be a telescopic spring or a gas spring.

[0070] Please refer to Figure 9 and Figure 10 The roller 122 comprises a conical wheel 1221 and a rotating tube 1222. The conical wheel 1221 is provided with two conical wheels 1221 arranged opposite to each other. A columnar threaded cavity is arranged in the conical wheel 1221. The rotating tube 1222 is provided with threads on the outside. The conical wheel 1221 is sleeved on the outside of the rotating tube 1222 and is threadedly connected with the rotating tube 1222. The conical wheel 1221 is threadedly connected with the outside of the rotating tube 1222 in opposite positions, so that the distance between the two conical wheels 1221 can be adjusted according to the diameter of the actual pipe 3. For the supporting frame 11 and the connecting frame 144, the rotating tube 1222 is rotatably arranged on the supporting frame 11 and the connecting frame 144, respectively. For the driving frame 131, the rotating tube 1222 is fixedly arranged on the driving shaft. The conical wheel 1221 can adjust the relative distance and can rotate in the supporting frame 11, the connecting frame 144 and the driving frame 131.

[0071] In summary, when the pipe 3 needs to be circumferentially cut, the roller 122 is driven to rotate by the driving motor 252, and the pipe 3 arranged above the roller 122 is moved. Since the pipe 3 is coaxial with the cutting track 21, the pipe 3 can be inserted into the cutting track 21. At this time, the driving motor 252 controls the rotation of the driving gear 251, the driving gear 251 is engaged with the gear groove 211, thereby driving the entire L-shaped frame 24 to rotate around the inner wall of the cutting track 21. By controlling the forward and reverse rotation of the driving motor 252, the clockwise or counterclockwise rotation of the L-shaped frame 24 along the cutting track 21 is controlled, thereby driving the two laser cutting devices 22 to cut the surface of the pipe 3 by 360°.

[0072] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A laser cutting device for large pipes, characterized in that: include: A supporting and transporting device (1), wherein the supporting and transporting device (1) is used to support the pipe and enable the pipe to move along the length direction of the supporting and transporting device (1); A rotary cutting device (2) having a hollow interior, the rotary cutting device (2) being mounted on a supporting and transporting device, the rotary cutting device (2) comprising a cutting track (21) having a partial annular shape and a laser cutting device (22), the cutting track (21) being coaxial with the pipe, the laser cutting device (22) being configured to move along the cutting track (21) and circumferentially cut the pipe, the laser cutting device (22) comprising two mutually perpendicularly arranged laser cutting devices (22), the laser cutting devices (22) being arranged at the midpoint of a chord of the cutting track (21), so that a light beam emitted by a laser generator can be vertically projected onto the surface of the pipe; The rotary cutting device (2) further comprises: A hollow frame (23), wherein the hollow frame (23) is mounted on the supporting and transporting device (1), the cutting track (21) is mounted on the inner wall of the hollow frame (23), a rectangular opening is provided on one side of the outer portion of the hollow frame (23), and a glass plate (231) is mounted on the rectangular opening; An L-shaped frame (24), the L-shaped frame (24) being mounted on the inner wall of the cutting track (21), the L-shaped frame (24) comprising two mutually perpendicular vertical sections (241) and a horizontal section (242), the lengths of the vertical section (241) and the horizontal section (242) being equal to the chord length of the circle on which the cutting track (21) is located, and the two laser cutting devices (22) being mounted on the midpoints of the vertical section (241) and the horizontal section (242), respectively; A travel drive device (25) includes a drive gear (251) and a drive motor (252). The drive gear (251) is rotatably assembled at the connection between the vertical section (241) and the horizontal section (242) via a rotating shaft (253). The drive motor (252) is assembled on one side of the L-shaped frame (24). The drive shaft of the drive motor (252) is coaxially connected and fixed to the rotating shaft (253). The ends of the vertical section (241) and the horizontal section (242) that are away from each other are respectively rotatably connected to driven gears (254). A tooth groove (211) is provided on the inner wall of the cutting track (21). The tooth groove (211) is meshed with the drive gear (251) and the driven gear (254).

2. The laser cutting equipment for large pipes according to claim 1, characterized in that: An interlayer (243) is provided inside the vertical section (241) and the horizontal section (242). A rectangular placement groove is provided at the midpoint of the interlayer (243) of the vertical section (241) and the horizontal section (242). A rubber layer (244) is provided inside the rectangular placement groove. The two laser cutting devices (22) are respectively assembled on the rubber layer (244). The driving gear (251) is assembled in the interlayer (243). The driving shaft of the driving motor (252) passes through one side of the L-shaped frame (24) and is coaxially connected and fixed to the driving gear (251). The vertical section (241) and the horizontal section (242) are provided with multiple groups of limiting members (26) at the interlayer (243). The multiple groups of limiting members (26) are respectively located on one side of the driving gear (251) or the driven gear (254) in a one-to-one correspondence.

3. The laser cutting equipment for large pipes according to claim 2, characterized in that: The limiting member (26) comprises: a fixing seat (261) with a spherical cavity provided therein, two fixing seats (261) are provided, and the two fixing seats (261) are relatively mounted on the inner wall of the interlayer (243) of the L-shaped frame (24); A ball (262) is disposed in the spherical cavity, one end of the ball (262) protrudes from the spherical cavity and contacts both sides of the cutting track (21).

4. The laser cutting equipment for large pipes according to claim 1, characterized in that: A notch (212) is provided on one side of the cutting track (21), and an angle a of the notch (212) satisfies 0≤a≤90°.

5. The laser cutting equipment for large pipes according to claim 3, characterized in that: The cutting track (21) is provided with partially circular sound-absorbing cotton strips (213) on both sides close to the inner circle, and the balls (262) and the sound-absorbing cotton strips (213) are in conflict with each other.

6. The laser cutting equipment for large pipes according to claim 1, characterized in that: The supporting and transporting devices (1) are provided with two, respectively located on both sides of the rotary cutting device (2), and the supporting and transporting devices (1) include: A support frame (11), the support frame (11) is arranged on one side of the hollow frame (23), one end of the support frame (11) extends into the interior of the hollow frame (23) and is located on one side of the cutting track (21); A roller assembly (12), wherein the roller assembly (12) is provided with a plurality of roller assemblies (12), and the plurality of roller assemblies (12) are assembled at intervals on the upper end of the support frame (11) along the length direction of the support frame (11), and the roller assembly (12) comprises: a roller frame (121) and a roller (122), the roller frame (121) is assembled on the upper end of the support frame (11), and the roller (122) is rotatably assembled on the roller frame (121).

7. The laser cutting equipment for large pipes according to claim 6, characterized in that: The supporting and transporting device (1) further comprises a driving wheel assembly (13), the driving wheel assembly (13) comprising a driving frame (131) and a servo motor (132), the driving frame (131) being mounted on one end of the supporting frame (11), a rotating shaft (133) being rotatably mounted in the driving frame (131), the roller (122) being coaxially sleeved on the rotating shaft (133), one end of the rotating shaft (133) protruding from the driving frame (131), the servo motor (132) being mounted below the supporting frame (11), and a transmission belt (134) being sleeved between the driving shaft of the servo motor (132) and one end of the rotating shaft (133).

8. The laser cutting equipment for large pipes according to claim 6, characterized in that: The support frame (11) is further equipped with a clamping mechanism (14), and the clamping mechanism (14) comprises: A support column (141), wherein the support column (141) is fixedly mounted on the support frame (11) in a vertical direction; An L-shaped height limiting frame (142) is provided at one end of the L-shaped height limiting frame (142), and the L-shaped height limiting frame (142) is sleeved on the support column (141). An elastic member (143) is provided inside the columnar cavity (1421), and both ends of the elastic member (143) are respectively connected and fixed to the support column (141) and the L-shaped height limiting frame (142). The other end of the L-shaped height limiting frame (142) is fixedly connected to a connecting frame (144) on a side close to the support frame (11), and the roller (122) is rotatably assembled inside the connecting frame (144).

9. The laser cutting equipment for large pipes according to claim 6, characterized in that: The roller (122) comprises: A conical wheel (1221), wherein two conical wheels (1221) are provided, the two conical wheels (1221) are arranged opposite to each other, and a columnar threaded cavity is provided inside the conical wheel (1221); The rotating tube (1222) is provided with a thread on the outside of the rotating tube (1222); the conical wheel (1221) is sleeved on the outside of the rotating tube (1222) and is threadedly connected to the rotating tube (1222).

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