A laser cutting device for metal tubes

Abstract

The present application relates to the technical field of laser cutting, and particularly relates to a metal pipe laser cutting device. The device comprises a workbench, a laser cutting machine installed on the top of the workbench, a rotary driving system installed on the top of the workbench, a blanking inclined plate connected to the side of the workbench, a translation system installed on the workbench, a fixing frame connected to the moving platform of the translation system, a connecting cylinder connected to the fixing frame, and a mesh pipe slidingly connected to the inside of the connecting cylinder. The device is provided with an internal water circulation and plugging system composed of the mesh pipe, the hollow disc and the annular air bag, water is injected into the cutting area of the metal pipe through the water inlet pipe, and the recycling assembly is used to form negative pressure to suck the water flow, so that the cooling water can continuously flow in the cutting area, the high-temperature molten metal generated by laser cutting is rapidly cooled and solidified after contacting the water flow, and is sucked away with the water flow, and is discharged through the liquid discharge pipe, thereby completely avoiding the problem that the molten slag is attached to the inner wall of the metal pipe.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and more particularly to a laser cutting device for metal tubes. Background Technology

[0002] In modern industrial manufacturing, metal pipes are widely used in various industries such as construction, automotive, aerospace, and energy transmission due to their excellent mechanical properties and wide range of applications. With the increasing demands for precision, efficiency, and surface quality in metal pipe processing, traditional mechanical cutting methods are no longer sufficient to meet complex and high-precision processing requirements. Laser cutting technology, with its advantages of non-contact operation, high precision, small heat-affected zone, and fast cutting speed, has become one of the mainstream processes in metal pipe processing.

[0003] Currently, common metal tube laser cutting equipment mainly achieves circumferential or irregular contour cutting of the tube by fixing a laser beam and driving the metal tube to rotate along its own axis, while simultaneously coordinating with the axial feed of the cutting head. This method can effectively complete the cutting or opening of circular cross-section tubes, featuring high automation and strong adaptability. However, in the actual cutting process, the laser beam acts on the tube wall to generate high temperatures, causing the metal to melt or even vaporize rapidly. Assist gas (such as nitrogen, oxygen, or air) is used to blow away the molten metal, forming a kerf. Due to the continuous rotation of the metal tube during the cutting process, the molten metal is easily blown to the inside of the tube under the combined action of the assist gas and centrifugal force, resulting in a large amount of slag adhering to the inner wall surface. This slag adhering to the inner wall is not only difficult to clean, but also forms irregular protrusions or oxide layers, seriously affecting the smoothness and dimensional accuracy of the inner surface of the metal tube. For high-precision applications requiring clean, residue-free inner walls, such as hydraulic system pipelines, food-grade conveying pipelines, or precision instrument conduits, this kind of inner wall contamination will directly lead to product malfunction or safety hazards. Furthermore, subsequent processing steps such as grinding, pickling, or sandblasting to remove slag from the inner wall not only increase production costs and time, but may also cause secondary damage to the pipe. Summary of the Invention

[0004] In view of this, the present invention provides a metal tube laser cutting device that can overcome the disadvantage that when existing laser cutting equipment cuts metal tubes, the molten metal is easily blown to the inside of the metal tube, resulting in a large amount of slag adhering to the inner wall surface of the metal tube.

[0005] The technical implementation scheme of the present invention is as follows: a metal tube laser cutting device, comprising: a worktable; a laser cutter installed on the top of the worktable; a rotary drive system installed on the top of the worktable; a feeding ramp connected to the side of the worktable; a translation system installed on the worktable; a fixed frame connected to the moving platform of the translation system; a connecting cylinder connected to the fixed frame; a mesh tube slidably connected to the inside of the connecting cylinder, with a notch at one end; a crossbar connected to the inside of the mesh tube; a water inlet pipe connected to the inside of the crossbar; a hollow disc connected to the other end of the mesh tube, the end of the water inlet pipe being connected to and maintaining communication with the inside of the hollow disc, and water outlet holes spaced apart circumferentially on the side of the hollow disc; a moving component disposed inside the connecting cylinder for driving the mesh tube to move; a recovery component disposed on the worktable for recovering water from the metal tube; and a sealing component disposed on the hollow disc for sealing the inside of the metal tube.

[0006] Optionally, the moving component includes: conveyor wheels, symmetrically rotatably connected inside the connecting cylinder, with the two conveyor wheels located on the front and rear sides of the mesh tube respectively, and in close contact with the outer wall of the mesh tube; and a drive motor, installed inside the connecting cylinder, with the rotation shaft of one of the conveyor wheels connected to the output shaft of the drive motor.

[0007] Optionally, the recycling component includes: a hollow frame connected to the end of the mesh tube, with the notch on the mesh tube located inside the hollow frame and maintaining communication; a first corrugated pipe connected at both ends to the hollow frame and the connecting cylinder respectively; a vacuum pump installed inside the workbench; an exhaust pipe connected to the outlet of the vacuum pump and maintaining communication, with the end of the exhaust pipe extending out of the side of the workbench; a gas-liquid separator installed inside the workbench; a vacuum pipe connected at both ends to the side of the gas-liquid separator and the inlet of the vacuum pump respectively and maintaining communication; a connecting pipe connected at both ends to the side of the hollow frame and the side of the gas-liquid separator respectively and maintaining communication; and a drain pipe connected to the bottom of the gas-liquid separator and maintaining communication, with the end of the drain pipe extending out of the side of the workbench.

[0008] Optionally, the sealing assembly includes: a hollow cone block rotatably connected to the side of the hollow disc, and the hollow cone block having square holes spaced apart circumferentially; an annular airbag connected to the hollow cone block, and the interior of the annular airbag communicating with the square holes on the hollow cone block; and an air supply mechanism disposed on the hollow frame for supplying air to the annular airbag.

[0009] Optionally, the gas supply mechanism includes: a fan installed on the top of the hollow frame; and a gas supply pipe connected to the inside of the crossbar, with both ends of the gas supply pipe connected to the hollow plate and the air outlet of the fan, respectively.

[0010] Optionally, it also includes: a connecting frame symmetrically connected to the frame of the laser cutting machine; a fixed cylinder connected between the two connecting frames; a second corrugated pipe connected at both ends to the fixed cylinder and the laser head of the laser cutting machine respectively; a rubber cloth symmetrically connected to both sides of the fixed cylinder; a rubber ring connected to the rubber cloth; a waste discharge pipe connected to the worktable, with both ends of the waste discharge pipe connected to the fixed cylinder and the connecting pipe respectively and kept in communication; and a control mechanism set on the connecting frame for controlling the expansion and contraction of the inner diameter of the rubber ring.

[0011] Optionally, the control mechanism includes: a rotating rod, circumferentially rotatably connected to the connecting frame, with one end of the rotating rod connected to a rubber ring; an electric push rod, mounted on the connecting frame; a rotating rod, connected to the telescopic rod of the electric push rod; a first connecting rod, connected to the other end of the rotating rod, with the ends of two of the first connecting rods respectively rotatably connected to two rotating rods; and a second connecting rod, with each of two adjacent first connecting rods rotatably connected to the second connecting rod.

[0012] Optionally, it also includes: a filter screen frame connected to the inner wall of the discharge ramp; a baffle connected to the discharge ramp, with the top of the baffle connected to the bottom of the filter screen frame; and a drain pipe connected to the side of the discharge ramp and kept in communication.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The present invention sets up an internal water circulation and sealing system composed of a mesh tube, a hollow disc and an annular airbag. Water is injected into the area to be cut of the metal tube through the water inlet pipe, and a negative pressure suction water flow is formed by the recovery component. This can form a continuous flow of cooling water in the cutting area. The high-temperature molten metal generated by laser cutting cools and solidifies rapidly after contacting the water flow and is drawn away with the water flow and discharged through the drain pipe. This completely avoids the problem of slag adhering to the inner wall of the metal tube, significantly improves the smoothness and dimensional accuracy of the inner surface, and eliminates the need for subsequent cleaning processes. At the same time, the annular airbag expands after inflation and fits tightly against the inner wall of the metal tube, which can effectively prevent the water flow and slag from spreading to the non-cutting area.

[0014] 2. This invention, through the setting of a sealed cover system consisting of a fixed cylinder, rubber cloth, rubber ring, and control mechanism, allows the control mechanism to drive the rubber ring to contract during cutting, bringing it close to the outer wall of the metal tube. Together with the rubber cloth and fixed cylinder, it forms a relatively sealed space around the cutting point. This space is connected to the negative pressure pipeline of the recycling component through a waste discharge pipe, which effectively extracts harmful fumes and gases generated during laser cutting. After being processed by a gas-liquid separator and a vacuum pump, the gases are discharged through an exhaust pipe or centrally treated, greatly improving the working environment for operators and ensuring production safety.

[0015] 3. This invention integrates a translation system, a rotation drive system, and a moving component, enabling automatic positioning, clamping, rotation, and precise feeding and retraction of the internal mesh tube and hollow disc. After cutting, the cut metal tube falls onto the discharge ramp, where a filter screen automatically separates the metal tube from the residual cooling water. The tube rolls down the ramp of the filter screen for discharge, while the wastewater is guided by a baffle to the drain pipe for unified recycling. The entire process is fully automated, from cutting, internal wall anti-pollution, and harmful gas treatment to the separation of finished product and waste liquid, effectively improving production efficiency and reducing labor costs and secondary processing difficulties. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram illustrating the installation of the mesh tube, crossbar, water inlet pipe, hollow disc, and moving component of the present invention.

[0018] Figure 3 This is a schematic diagram of the installation of the hollow frame and the first corrugated pipe of the present invention.

[0019] Figure 4 This is a schematic diagram of the specific structure of the recycling component of the present invention.

[0020] Figure 5 This is a schematic diagram of the installation of the hollow cone block of the present invention.

[0021] Figure 6 This is a schematic diagram of the specific structure of the sealing component of the present invention.

[0022] Figure 7 This is a schematic diagram of the installation of the connecting frame and the waste discharge pipe of the present invention.

[0023] Figure 8 This is a schematic diagram of the specific structure of the connecting frame of the present invention.

[0024] Figure 9 This is a schematic diagram showing the cooperation of the rubber ring, rotating rod, first connecting rod, and second connecting rod of the present invention.

[0025] The components in the attached diagram are labeled as follows: 1-Workbench, 2-Laser Cutting Machine, 3-Rotary Drive System, 4-Discharge Inclined Plate, 5-Translation System, 6-Fixed Frame, 7-Connecting Cylinder, 8-Network Tube, 801-Notch, 9-Horizontal Bar, 10-Water Inlet Pipe, 11-Hollow Disc, 1101-Water Outlet Hole, 12-Conveyor Wheel, 13-Drive Motor, 14-Hollow Frame, 15-First Corrugated Pipe, 16-Air Pump, 17-Exhaust Pipe, 18-Gas-Liquid Separator, 19- 20-Ejection pipe, 21-Connecting pipe, 22-Drain pipe, 22-Hollow cone block, 2201-Square hole, 23-Annular airbag, 24-Fan, 25-Gas delivery pipe, 26-Connecting frame, 27-Fixing cylinder, 28-Second corrugated pipe, 29-Rubber cloth, 30-Rubber ring, 31-Waste discharge pipe, 32-Rotating rod, 33-Electric push rod, 3301-Rotating rod, 34-First connecting rod, 35-Second connecting rod, 36-Filter screen frame, 37-Baffle, 38-Drain pipe. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example: A metal tube laser cutting device, such as Figures 1-6As shown, the system includes a worktable 1, a laser cutting machine 2, a rotary drive system 3, a feeding ramp 4, a translation system 5, a fixed frame 6, a connecting cylinder 7, a mesh tube 8, a crossbar 9, a water inlet pipe 10, a hollow disc 11, a moving assembly, a recycling assembly, and a sealing assembly. The laser cutting machine 2 is mounted on the top right rear side of the worktable 1. The laser head of the laser cutting machine 2 has a lifting and adjusting function. The rotary drive system 3 is mounted on the top right front side of the worktable 1. The rotary drive system 3 has the function of clamping the metal tube and driving the metal tube to rotate. The feeding ramp 4 is connected to the front side of the worktable 1. The feeding ramp 4 has an overall "U" shape. The translation system 5 is mounted on the top left side of the worktable 1. The fixed frame 6 is connected to the moving platform of the translation system 5 so that the translation system 5 can drive the fixed frame 6 to move left and right. The functions of the laser cutting machine 2, the rotary drive system 3, and the translation system 5 are all existing technologies. Without going into too much detail here, the front of the fixed frame 6 is connected to the connecting cylinder 7. The left side of the connecting cylinder 7 is an open design, and the right side of the connecting cylinder 7 is a closed design. A storage groove is opened in the middle of the right side of the connecting cylinder 7. A mesh tube 8 is slidably connected inside the connecting cylinder 7. A notch 801 is opened at the left end of the mesh tube 8. A crossbar 9 is connected inside the mesh tube 8. A gap is left between the inner wall of the mesh tube 8 and the crossbar 9. A water inlet pipe 10 is connected to the lower inside of the crossbar 9. A hollow plate 11 is connected to the right end of the mesh tube 8. The right end of the water inlet pipe 10 is connected to the middle of the interior of the hollow plate 11 and keeps it in communication. Water outlet holes 1101 are spaced apart on the left side of the hollow plate 11. The connecting cylinder 7 is equipped with a moving component for driving the mesh tube 8 to move. A recycling component for recycling water in the metal pipe is provided on the workbench 1. A sealing component for sealing the inside of the metal pipe is provided on the hollow plate 11.

[0028] like Figure 2 As shown, the moving component includes a conveyor wheel 12 and a drive motor 13. The conveyor wheel 12 is symmetrically connected to the inside of the connecting cylinder 7, and the two conveyor wheels 12 are located on the front and rear sides of the mesh tube 8 respectively, and are in close contact with the outer wall of the mesh tube 8. The drive motor 13 is installed inside the connecting cylinder 7, and the rotation shaft of the rear conveyor wheel 12 is connected to the output shaft of the drive motor 13.

[0029] like Figure 3 and Figure 4As shown, the recycling assembly includes a hollow frame 14, a first corrugated pipe 15, a vacuum pump 16, an exhaust pipe 17, a gas-liquid separator 18, a vacuum pipe 19, a connecting pipe 20, and a drain pipe 21. The left end of the mesh pipe 8 is connected to the hollow frame 14, and the notch 801 on the mesh pipe 8 is located inside the hollow frame 14 and remains connected. The right side of the hollow frame 14 is connected to the inner wall of the connecting cylinder 7 via the first corrugated pipe 15, and the mesh pipe 8 is located inside the first corrugated pipe 15. The vacuum pump 16 is installed on the lower left side of the inside of the workbench 1. The outlet of the vacuum pump 16... An exhaust pipe 17 is connected to the air inlet and kept in contact with it. The left end of the exhaust pipe 17 extends out of the lower left side of the workbench 1. A gas-liquid separator 18 is also installed on the lower left side inside the workbench 1. An air extraction pipe 19 is connected between the right side of the gas-liquid separator 18 and the air inlet of the air pump 16 and kept in contact with it. A connecting pipe 20 is connected between the left side of the gas-liquid separator 18 and the front side of the hollow frame 14 and kept in contact with it. A drain pipe 21 is connected to the bottom of the gas-liquid separator 18 and kept in contact with it. The lower end of the drain pipe 21 extends out of the lower rear side of the workbench 1.

[0030] like Figure 5 and Figure 6 As shown, the sealing assembly includes a hollow cone block 22, an annular airbag 23, and an air supply mechanism. The hollow cone block 22 is rotatably connected to the right side of the hollow disc 11, and the hollow cone block 22 has square holes 2201 spaced apart circumferentially. The annular airbag 23 is connected to the hollow cone block 22, and the interior of the annular airbag 23 is in communication with the square holes 2201 on the hollow cone block 22. The hollow frame 14 is provided with an air supply mechanism for supplying air to the annular airbag 23. The air supply mechanism includes a fan 24 and an air supply pipe 25. The fan 24 is installed on the top of the hollow frame 14, and the air supply pipe 25 is connected to the upper interior of the crossbar 9. The right end of the air supply pipe 25 is connected to the hollow disc 11, and the right end of the air supply pipe 25 is in communication with the interior of the hollow cone block 22. The left end of the air supply pipe 25 is connected to and in communication with the air outlet of the fan 24.

[0031] In the initial state, the left end of the inlet pipe 10 is connected to a water source, and the hollow disc 11 and hollow cone 22 are located in the receiving groove. When the device is needed, firstly, according to the required cutting length of the metal pipe, the translation system 5 drives the fixing frame 6 to move left and right. The fixing frame 6 drives the connecting cylinder 7 to move left and right to adjust the distance between the right side of the connecting cylinder 7 and the laser head of the laser cutting machine 2. Then, the metal pipe is conveyed to the left by the conveyor, so that the metal pipe passes through the rotation drive system 3 until the left end of the metal pipe abuts against the right side of the connecting cylinder 7. Then, the drive motor 13 drives the conveyor wheel 12 to rotate, and the conveyor wheel 12 drives the mesh pipe 8 to move to the right. The first corrugated pipe 15 shortens accordingly, and the mesh pipe 8 drives the hollow disc 11 and hollow cone 22 to move to the right and extend into the machine. Inside the metal tube, until the hollow disc 11 and hollow cone 22 move to the right side of the position to be cut, the blower 24 is started to rotate forward. The blower 24 injects air into the annular airbag 23 through the air supply pipe 25 and the square hole 2201 on the hollow cone 22, causing the annular airbag 23 to expand and adhere to the inner wall of the metal tube. Then, water is injected into the hollow disc 11 through the water inlet pipe 10. The water in the hollow disc 11 overflows into the inside of the metal tube through the water outlet 110. Under the blocking effect of the annular airbag 23, the water will only exist in the part of the metal tube to be cut and will not enter the rest of the metal tube. At the same time, the suction pump 16 and the gas-liquid separator 18 are started. The suction pump 16 can extract the air in the suction pipe 19 and the connecting pipe 20 and discharge it through the exhaust pipe. The air tube 17 discharges outward, creating a negative pressure inside the connecting tube 20. At this time, the water inside the metal tube to be cut will enter the hollow frame 14 through the mesh tube 8 and the first corrugated tube 15, and then enter the gas-liquid separator 18 through the connecting tube 20. The gas-liquid separator 18 can separate the gas and liquid, allowing the liquid to be discharged outward through the drain pipe 21. The water discharged through the drain pipe 21 can be collected uniformly for easy recycling. This creates a flowing water flow inside the metal tube to be cut. Then, the laser cutting machine 2 and the rotary drive system 3 are started. The rotary drive system 3 can clamp the metal tube and drive it to rotate. Through the friction between the metal tube and the annular air bladder 23, the annular air bladder 23 and the hollow cone block 22 can rotate synchronously. To prevent wear on the annular airbag 23, the laser cutting machine 2 can laser cut the rotating metal tube. Molten metal produced during the cutting process falls into the metal tube and comes into contact with the water inside, causing the molten metal to cool rapidly and form slag. This slag is then discharged through the drain pipe 21 with the flowing water. After cutting, the laser cutting machine 2 and the rotary drive system 3 are turned off, and the water inlet pipe 10 is stopped from injecting water into the hollow disc 11. Then, the fan 24 is reversed. The fan 24 extracts air from the annular airbag 23 through the air supply pipe 25 and the square hole 2201 on the hollow cone block 22, causing the annular airbag 23 to contract and detach from the inner wall of the metal tube. Then, the drive motor 13 drives the conveyor wheel 12 to reverse.The conveyor wheel 12 drives the mesh tube 8 to move to the left and reset, causing the first corrugated pipe 15 to extend. The mesh tube 8 then drives the hollow disc 11 and hollow cone block 22 to move to the left and reset, returning them to the receiving slot on the right side of the connecting cylinder 7. Then, the translation system 5 drives the fixing frame 6 and connecting cylinder 7 to move a specified distance to the left, separating the connecting cylinder 7 from the left end of the metal tube. The cut metal tube then falls to the top of the discharge ramp 4 due to gravity and rolls down the ramp for discharge. The translation system 5 then drives the fixing frame 6 and connecting cylinder 7 to move a specified distance to the right and reset. Repeating this process allows for further cutting of the metal tube to a fixed length.

[0032] like Figures 7-9 As shown, it also includes a connecting frame 26, a fixed cylinder 27, a second corrugated pipe 28, a rubber sheet 29, a rubber ring 30, a waste discharge pipe 31, and a control mechanism. Connecting frames 26 are symmetrically connected to the left and right sides of the frame of the laser cutting machine 2. A fixed cylinder 27 is connected between the two connecting frames 26. Both sides of the fixed cylinder 27 are open. A second corrugated pipe 28 is connected between the top of the fixed cylinder 27 and the laser head of the laser cutting machine 2. When the laser head of the laser cutting machine 2 is adjusted in height, the second corrugated pipe 28 can extend and retract accordingly. Rubber sheets 29 are connected to both sides of the fixed cylinder 27. A rubber ring 30 is connected to the side of the rubber sheet 29 away from the fixed cylinder 27. A waste discharge pipe 31 is connected to the worktable 1, and both ends of the waste discharge pipe 31 are connected to the fixed cylinder 28. The top of 7 and the lower part of the connecting tube 20 are kept in communication. The connecting frame 26 is provided with a control mechanism for controlling the expansion and contraction of the inner diameter of the rubber ring 30. The control mechanism includes a rotating rod 32, an electric push rod 33, a rotating rod 3301, a first connecting rod 34 and a second connecting rod 35. Multiple rotating rods 32 are circumferentially rotatably connected to both connecting frames 26, and one end of the rotating rod 32 is connected to the rubber ring 30. Electric push rods 33 are installed on both connecting frames 26. The telescopic rod of the electric push rod 33 is connected to the rotating rod 3301. The other end of each rotating rod 32 is connected to the first connecting rod 34, and the ends of two of the first connecting rods 34 are rotatably connected to two rotating rods 3301 respectively. Each pair of adjacent first connecting rods 34 is rotatably connected to the second connecting rod 35.

[0033] Initially, the rubber ring 30 is in an expanded state, meaning its inner diameter is at its maximum. When the conveyor transports the metal pipe to the left, the pipe passes through the inner sides of the fixed cylinder 27, the rubber cloth 29, and the rubber ring 30 until its left end abuts against the right side of the connecting cylinder 7. At this point, the telescopic rod of the electric push rod 33 can be shortened, driving the rotating rod 3301 upwards. Both rotating rods 3301 will then drive the upper ends of the first connecting rods 34 connected to them upwards, causing the two first connecting rods 34 to rotate around the rotation axis of the rotating rod 32. These two first connecting rods 34, through the second connecting rod 35, can drive the remaining first connecting rods 34 to rotate around the rotation axis of the rotating rod 32, causing all the rotating rods 32 to rotate. At this time, the ends of the rotating rods 32 will cause the rubber ring 30 to retract (e.g., Figure 8 As shown, the inner diameter of the rubber ring 30 is reduced and brought close to the outside of the metal tube. It is important to note that the inner side of the rubber ring 30 does not contact the outer side of the metal tube, thus not affecting the subsequent rotational cutting of the metal tube. At this time, under the shielding effect of the rubber cloth 29, a relatively sealed space is formed inside the fixed cylinder 27. Then, the laser head of the laser cutting machine 2 can perform laser cutting on the metal tube inside the fixed cylinder 27, preventing the harmful gases generated during cutting from escaping into the air. Simultaneously, the negative pressure formed inside the connecting pipe 20 will generate suction at the upper end of the waste discharge pipe 31, thereby drawing in the harmful gases inside the fixed cylinder 27, allowing the harmful gases to flow sequentially through the waste discharge pipe 31. The system consists of a connecting pipe 20, a gas-liquid separator 18, a suction pipe 19, a suction pump 16, and an exhaust pipe 17. The metal pipe is then discharged through the exhaust pipe 17 for subsequent unified processing. After the metal pipe is cut, the telescopic rod of the electric push rod 33 is extended. The telescopic rod of the electric push rod 33 drives the rotating rod 3301 to move downward. Similarly, the rotating rod 3301 can drive the rotating rod 32 to reverse through the first connecting rod 34 and the second connecting rod 35. The end of the rotating rod 32 will cause the rubber ring 30 to expand. The inner diameter of the rubber ring 30 increases, so that the inner side of the rubber ring 30 is away from the outer side of the metal pipe. Subsequently, the cut metal pipe will fall down to the top of the feeding inclined plate 4 due to gravity for discharge.

[0034] like Figure 1 As shown, it also includes a filter screen frame 36, a baffle 37 and a drain pipe 38. The filter screen frame 36 is connected to the upper inner wall of the feeding inclined plate 4. The baffle 37 is connected to the front inner bottom of the feeding inclined plate 4, and the top of the baffle 37 is connected to the front bottom of the filter screen frame 36. The drain pipe 38 is connected to the lower left side of the feeding inclined plate 4 and remains connected.

[0035] When the cut metal pipe falls down for discharge, it will fall to the top of the filter screen frame 36. At this time, the water remaining inside the metal pipe will continue to fall down through the filter screen frame 36 to the top of the discharge ramp 4, thus separating the metal pipe from the water. The metal pipe will roll down along the top of the filter screen frame 36 for discharge, while the water on the top of the discharge ramp 4 will also fall down. The baffle 37 is used to block the water on the top of the discharge ramp 4 so that the water on the top of the discharge ramp 4 can be discharged uniformly through the drain pipe 38 for easy recycling.

[0036] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A metal tube laser cutting device, comprising: a worktable (1); a laser cutter (2) mounted on the top of the worktable (1); a rotary drive system (3) mounted on the top of the worktable (1); a feeding ramp (4) connected to the side of the worktable (1); and a translation system (5) mounted on the worktable (1); characterized in that, It also includes: a fixed frame (6), connected to the moving platform of the translation system (5); a connecting cylinder (7), connected to the fixed frame (6); a mesh tube (8), slidably connected to the inside of the connecting cylinder (7), and one end of the mesh tube (8) has a notch (801); a crossbar (9), connected to the inside of the mesh tube (8); a water inlet pipe (10), connected to the inside of the crossbar (9); a hollow disc (11), connected to the other end of the mesh tube (8), the end of the water inlet pipe (10) is connected to the inside of the hollow disc (11) and keeps in communication, and the side of the hollow disc (11) has water outlet holes (1101) spaced apart circumferentially; a moving component, set inside the connecting cylinder (7), used to drive the mesh tube (8) to move; a recycling component, set on the workbench (1), used to recycle the water in the metal pipe; and a sealing component, set on the hollow disc (11), used to seal the inside of the metal pipe. The moving component includes: a conveyor wheel (12), which is symmetrically rotatably connected to the inside of the connecting cylinder (7), and the two conveyor wheels (12) are located on the front and rear sides of the mesh tube (8) respectively, and are in close contact with the outer wall of the mesh tube (8); a drive motor (13), which is installed inside the connecting cylinder (7), and the rotation shaft of one of the conveyor wheels (12) is connected to the output shaft of the drive motor (13); The sealing assembly includes: a hollow cone block (22), rotatably connected to the side of the hollow disc (11), and the hollow cone block (22) has square holes (2201) spaced apart circumferentially; an annular airbag (23), connected to the hollow cone block (22), and the interior of the annular airbag (23) is in communication with the square holes (2201) on the hollow cone block (22); and an air supply mechanism, disposed on the hollow frame (14), for supplying air to the annular airbag (23); It also includes: a connecting frame (26), symmetrically connected to the frame of the laser cutting machine (2); a fixed cylinder (27), connected between the two connecting frames (26); a second corrugated pipe (28), with its two ends connected to the fixed cylinder (27) and the laser head of the laser cutting machine (2) respectively; a rubber cloth (29), symmetrically connected to both sides of the fixed cylinder (27); a rubber ring (30), connected to the rubber cloth (29); a waste discharge pipe (31), connected to the worktable (1), with its two ends connected to the fixed cylinder (27) and the connecting pipe (20) respectively and kept in communication; and a control mechanism, set on the connecting frame (26), used to control the expansion and contraction of the inner diameter of the rubber ring (30); The control mechanism includes: a rotating rod (32), which is circumferentially rotatably connected to the connecting frame (26), and one end of the rotating rod (32) is connected to the rubber ring (30); an electric push rod (33), which is mounted on the connecting frame (26); a rotating rod (3301), which is connected to the telescopic rod of the electric push rod (33); a first connecting rod (34), which is connected to the other end of the rotating rod (32), and the ends of two of the first connecting rods (34) are respectively rotatably connected to two rotating rods (3301); and a second connecting rod (35), which is rotatably connected to each of the two adjacent first connecting rods (34). The recycling assembly includes: a hollow frame (14) connected to the end of the mesh tube (8), with the notch (801) on the mesh tube (8) located inside the hollow frame (14) and maintaining communication; a first corrugated pipe (15) connected at both ends to the hollow frame (14) and the connecting cylinder (7); a vacuum pump (16) installed inside the workbench (1); and an exhaust pipe (17) connected to the outlet of the vacuum pump (16) and maintaining communication, with the end of the exhaust pipe (17) extending out from the side of the workbench (1). Gas-liquid separator (18) is installed inside the workbench (1); suction pipe (19) is connected at both ends to the side of the gas-liquid separator (18) and the air inlet of the suction pump (16) and kept in communication; connecting pipe (20) is connected at both ends to the side of the hollow frame (14) and the side of the gas-liquid separator (18) and kept in communication; drain pipe (21) is connected to the bottom of the gas-liquid separator (18) and kept in communication, and the end of the drain pipe (21) extends out of the side of the workbench (1).

2. The metal tube laser cutting device according to claim 1, characterized in that, The gas supply mechanism includes: a fan (24) installed on the top of the hollow frame (14); and a gas pipe (25) connected to the inside of the crossbar (9), with the two ends of the gas pipe (25) connected to the hollow plate (11) and the outlet of the fan (24) respectively.

3. A metal tube laser cutting device according to claim 1, characterized in that, It also includes: a filter screen frame (36), connected to the inner wall of the feed sloping plate (4); a baffle (37), connected to the feed sloping plate (4), with the top of the baffle (37) connected to the bottom of the filter screen frame (36); and a drain pipe (38), connected to the side of the feed sloping plate (4) and kept in communication.

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