An elongate tube laser cladding apparatus

Abstract

The application relates to the technical field of laser cladding, and discloses an elongated tube laser cladding device, which comprises a cladding shell, the inner cavity of the cladding shell is rotationally connected with an elongated tube, the inside of the cladding shell is provided with a laser nozzle used for cladding the elongated tube, the inside of the cladding shell is provided with a rotating assembly used for resisting and rotating the elongated tube, the inside of the cladding shell is provided with a lifting and falling assembly used for resisting and lifting and falling the elongated tube, and the inside of the cladding shell is provided with a sliding assembly used for assisting the laser nozzle in sliding on the surface of the elongated tube. The metal powder spray pipe angle can be adjusted, the metal powder spray pipe angle is increased when the metal powder spray pipe is close to the elongated tube, the greater the opening angle of the metal powder spray pipe is, the more metal powder sprayed by the metal powder spray pipe can be covered on the elongated tube at a closer distance, and the cladding of the elongated tube is more sufficient.

Description

Technical Field

[0001] This invention relates to the field of laser cladding technology, specifically to a slender tube laser cladding device. Background Technology

[0002] Laser cladding technology involves spraying metal powder onto the surface of a workpiece and then using a laser to clad it, thereby increasing the workpiece's durability. Currently, most laser cladding equipment on the market uses a fixed spray direction for the metal powder, lacking control over the angle at which the powder is sprayed onto the workpiece surface. This results in the powder being sprayed at the same angle regardless of the workpiece size, leading to insufficient coverage of the workpiece surface at close range and reduced cladding quality. Furthermore, many laser cladding machines are simply left unused after cladding, lacking post-processing protection, allowing dust to enter the equipment. Additionally, many current machines expose the cladding process to the elements, leaving workers and the equipment exposed, increasing the risk of workpiece splatter from the powder onto workers and creating safety hazards.

[0003] To address this, a laser cladding device for slender tubes is proposed. Summary of the Invention

[0004] The purpose of this invention is to provide a laser cladding device for slender tubes to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a laser cladding device for a slender tube, comprising a cladding shell, a slender tube rotatably connected to the inner cavity of the cladding shell, a laser nozzle for cladding the slender tube inside the cladding shell, a rotating assembly for rotating after contacting the slender tube inside the cladding shell, a lifting assembly for rising and falling after contacting the slender tube inside the cladding shell, a sliding assembly for assisting the laser nozzle to slide on the surface of the slender tube inside the cladding shell, and a spreading assembly for preventing the laser nozzle from being exposed and damaged inside the cladding shell;

[0006] The lifting assembly includes a protrusion, a swing rod, a second connecting rod, and a metal powder spray pipe. The protrusion and the swing rod mesh with each other. The end of the swing rod away from the protrusion is fixedly connected to the second connecting rod, and the bottom end of the second connecting rod is fixedly connected to the metal powder spray pipe.

[0007] Preferably, the lifting assembly further includes a spring three, the bottom end of which is fixedly connected to a lifting rod, the side wall of which is fixedly connected to the side wall of the protrusion, the side wall of the laser nozzle is fixedly connected to a fixing plate one, the outer surface of the fixing plate one is rotatably connected to a swing rod, the top end of the laser nozzle is fixedly connected to a flexible tube, the bottom end of which is fixedly connected to the top end of the metal powder spray pipe, and the interior of the flexible tube is in communication with the interior of the metal powder spray pipe, the side wall of the lifting rod away from the laser nozzle has a groove one, the side wall of the lifting rod near the laser nozzle has a groove two, and the bottom end of the lifting rod is rotatably connected to a roller two.

[0008] Preferably, the rotating assembly includes a rotating shaft, which is fixedly connected to the inner wall of the lifting rod. A rotating body is rotatably connected to the middle of the rotating shaft. The end of the rotating body away from the slender tube has an inner cavity. A spring is fixedly connected to the inner cavity of the end of the rotating body away from the slender tube. A connecting rod is fixedly connected to the end of the spring away from the rotating shaft. The connecting rod slides in the inner cavity of the end of the rotating body away from the slender tube. A magnetic suction plate is fixedly connected to the end of the connecting rod away from the rotating body. A fixed shaft is fixedly connected to the end of the rotating body near the slender tube. A roller is rotatably connected to the side of the fixed shaft away from the rotating body. A spring is fixedly connected to the inner wall of the lifting rod. The end of the spring near the center of the inner cavity of the lifting rod is fixedly connected to the side wall of the rotating body.

[0009] Preferably, the sliding assembly further includes a sliding block one, which is slidably connected to the upper surface of the cladding shell. A connecting plate is fixedly connected to the side of the sliding block one near the center of the upper surface of the cladding shell. A powder collection box is fixedly connected to the end of the connecting plate away from the sliding block one. A groove three is formed on the side of the sliding block one near the connecting plate. A sliding block two is fixedly connected to the upper surface of the laser nozzle. The sliding block two slides vertically on the side of the sliding block one near the connecting plate through the groove three.

[0010] Preferably, the spreading assembly includes a fixed column, which is fixedly connected to the upper end of the cladding shell. A transparent cover is rotatably connected to the side wall of the fixed column. A groove four is provided on the side of the transparent cover near the cladding shell. A sliding rod is slidably connected to the transparent cover through the groove four. A connecting rod three is rotatably connected to the end of the sliding rod away from the transparent cover. A thin rod is fixedly connected to the side wall of the connecting rod three. A thick rod is fixedly connected to the top of the sliding block two. The end of the thin rod away from the connecting rod three is slidably connected to the inner cavity of the thick rod. A fixed plate two is fixedly connected to the side wall of the fixed column. An opening is provided on the side wall of the fixed plate two.

[0011] Preferably, the side wall of the connecting rod three slides through the opening into the interior of the fixed plate two, thus achieving synchronous sliding of the connecting rod three and the sliding block one.

[0012] Preferably, the powder collection box slides on the upper surface of the cladding shell, which serves to make the powder collection box and the sliding block slide synchronously.

[0013] Preferably, both the first sliding block and the second sliding block can be driven to be mounted on an external first drive, and the sliding drive of both the first sliding block and the second sliding block is electrically connected to an external power supply.

[0014] Preferably, the cladding shell is drivably mounted on an external second drive, and the external second drive of the cladding shell is electrically connected to an external power supply.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By adjusting the angle of the metal powder nozzle, the angle of the metal powder nozzle can be increased when it is close to the slender tube. Therefore, the larger the opening angle of the metal powder nozzle, the more metal powder can be sprayed and cover the slender tube at a closer distance, thus making the cladding of the slender tube more complete.

[0017] 2. By rotating the component, the magnetic plates are opened when the laser nozzle is in use, and the magnetic plates attract and stick together when the laser nozzle is not in use. This serves to cover the laser nozzle when it is not in use, preventing dust from entering the laser nozzle when the cladding equipment is not in use, and thus preventing the laser nozzle from being contaminated by dust.

[0018] 3. By setting up the expansion component, the transparent cover can be covered on the surface of the equipment during cladding, which can prevent laser from splashing onto the outside of the equipment and thus prevent laser from splashing and injuring the workers, thereby protecting the workers. After the cladding is completed, the transparent cover can be expanded again, which makes it convenient for workers to collect the clad slender tube without having to manually open the transparent cover. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a side view of the laser nozzle structure of the present invention;

[0021] Figure 3 This is a three-dimensional schematic diagram of the rotating component structure of the present invention;

[0022] Figure 4 This is a cross-sectional view of the rotating component structure of the present invention;

[0023] Figure 5 This is a cross-sectional schematic diagram of the structural relationship between the two springs and the rotating body of the present invention;

[0024] Figure 6 This is a three-dimensional schematic diagram of the lifting component structure of the present invention;

[0025] Figure 7 This is a three-dimensional schematic diagram of the structure of the extended component of the present invention;

[0026] Figure 8 This is a three-dimensional schematic diagram of the structural relationship between the sliding block and the powder collection box of the present invention;

[0027] Figure 9 This is a three-dimensional schematic diagram of the positional relationship between the sliding block 2 and the transparent cover of the present invention;

[0028] Figure 10 This is a three-dimensional schematic diagram of the positional relationship between the transparent cover and the sliding rod of the present invention.

[0029] In the picture:

[0030] 1. Cladding shell; 2. Slender tube; 3. Laser nozzle;

[0031] 4. Rotating assembly; 41. Rotating shaft; 42. Rotating body; 43. Spring 1; 44. Connecting rod 1; 45. Magnetic suction plate; 46. Fixed shaft; 47. Roller 1; 48. Spring 2;

[0032] 5. Lifting assembly; 51. Spring 3; 52. Lifting rod; 53. Protrusion; 54. Swing rod; 55. Connecting rod 2; 56. Hose; 57. Metal powder spray pipe; 58. Fixing plate 1; 59. Groove 1; 510. Groove 2; 511. Roller 2;

[0033] 6. Sliding component; 61. Sliding block one; 62. Connecting plate; 63. Dust collection box; 64. Groove three; 65. Sliding block two;

[0034] 7. Spreading component; 71. Fixing column; 72. Transparent cover; 73. Groove four; 74. Sliding rod; 75. Connecting rod three; 76. Thin rod; 77. Thick rod; 78. Fixing plate two; 79. Opening. Detailed Implementation

[0035] 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 protection scope of the present invention.

[0036] Please see Figures 1 to 10An embodiment of the present invention is provided: a slender tube laser cladding device, including a cladding shell 1, the cladding shell 1 being drivably mounted on an external second drive, and the external second drive of the cladding shell 1 being electrically connected to an external power supply, the inner cavity of the cladding shell 1 being rotatably connected to a slender tube 2, the interior of the cladding shell 1 being provided with a laser nozzle 3 for cladding the slender tube 2, the interior of the cladding shell 1 being provided with a rotating component 4 for rotating after contacting the slender tube 2, the interior of the cladding shell 1 being provided with a lifting component 5 for rising and falling after contacting the slender tube 2, the interior of the cladding shell 1 being provided with a sliding component 6 for assisting the laser nozzle 3 to slide on the surface of the slender tube 2, and the interior of the cladding shell 1 being provided with a spreading component 7 for preventing the laser nozzle 3 from being exposed and damaged.

[0037] The lifting assembly 5 includes a protrusion 53, a swing rod 54, a connecting rod 55, and a metal powder spray pipe 57. The protrusion 53 and the swing rod 54 mesh with each other. The end of the swing rod 54 away from the protrusion 53 is fixedly connected to the connecting rod 55, and the bottom end of the connecting rod 55 is fixedly connected to the metal powder spray pipe 57.

[0038] The lifting assembly 5 also includes a spring 3 51, the bottom end of which is fixedly connected to a lifting rod 52. The side wall of the lifting rod 52 is fixedly connected to the side wall of the protrusion 53. The side wall of the laser nozzle 3 is fixedly connected to a fixing plate 1 58. The outer surface of the fixing plate 1 58 is rotatably connected to a swing rod 54. The top end of the laser nozzle 3 is fixedly connected to a flexible hose 56. The bottom end of the flexible hose 56 is fixedly connected to the top end of the metal powder spray pipe 57, and the interior of the flexible hose 56 is interconnected with the interior of the metal powder spray pipe 57. The side wall of the lifting rod 52 away from the laser nozzle 3 has a groove 1 59, and the side wall of the lifting rod 52 close to the laser nozzle 3 has a groove 2 510. The bottom end of the lifting rod 52 is rotatably connected to a roller 2 511.

[0039] The rotating assembly 4 includes a rotating shaft 41, which is fixedly connected to the inner wall of the lifting rod 52. A rotating body 42 is rotatably connected to the middle of the rotating shaft 41. The end of the rotating body 42 away from the slender tube 2 has an inner cavity. A spring 43 is fixedly connected to the inner cavity of the end of the rotating body 42 away from the slender tube 2. A connecting rod 44 is fixedly connected to the end of the spring 43 away from the rotating shaft 41. The connecting rod 44 slides in the inner cavity of the end of the rotating body 42 away from the slender tube 2. A magnetic plate 45 is fixedly connected to the end of the connecting rod 44 away from the rotating body 42. A fixed shaft 46 is fixedly connected to the end of the rotating body 42 near the slender tube 2. A roller 47 is rotatably connected to the side of the fixed shaft 46 away from the rotating body 42. A spring 48 is fixedly connected to the inner wall of the lifting rod 52. The end of the spring 48 near the center of the inner cavity of the lifting rod 52 is fixedly connected to the side wall of the rotating body 42.

[0040] The sliding assembly 6 also includes a sliding block 61, which is slidably connected to the upper surface of the cladding shell 1. A connecting plate 62 is fixedly connected to the side of the sliding block 61 near the center of the upper surface of the cladding shell 1. A powder collection box 63 is fixedly connected to the end of the connecting plate 62 away from the sliding block 61. The powder collection box 63 slides on the upper surface of the cladding shell 1, which plays the role of synchronous sliding of the powder collection box 63 and the sliding block 61. A groove 64 is provided on the side of the sliding block 61 near the connecting plate 62. A sliding block 65 is fixedly connected to the upper surface of the laser nozzle 3. Both the sliding block 61 and the sliding block 65 can be driven and installed on the external first drive. The sliding drive of both the sliding block 61 and the sliding block 65 are electrically connected to the external power supply. The sliding block 65 slides vertically on the side of the sliding block 61 near the connecting plate 62 through the groove 64.

[0041] The expansion assembly 7 includes a fixed post 71, which is fixedly connected to the upper end of the cladding shell 1. A transparent cover 72 is rotatably connected to the side wall of the fixed post 71. A groove 73 is provided on the side of the transparent cover 72 near the cladding shell 1. A sliding rod 74 is slidably connected to the transparent cover 72 through the groove 73. A connecting rod 75 is rotatably connected to the end of the sliding rod 74 away from the transparent cover 72. The side wall of the connecting rod 75 slides through the opening 79 inside the fixed plate 78, which enables the connecting rod 75 to slide synchronously with the sliding block 61. A thin rod 76 is fixedly connected to the side wall of the connecting rod 75. A thick rod 77 is fixedly connected to the top of the sliding block 65. The end of the thin rod 76 away from the connecting rod 75 is slidably connected to the inner cavity of the thick rod 77. A fixed plate 78 is fixedly connected to the side wall of the fixed post 71. An opening 79 is provided on the side wall of the fixed plate 78.

[0042] Working principle: In the initial state, spring 1 43 is stretched, the two magnetic plates 45 are magnetically attracted to each other, roller 1 47 does not contact the slender tube 2, spring 2 48 is not stretched, spring 3 51 is not compressed, roller 2 511 does not contact the slender tube 2, and the transparent cover 72 is in the open state.

[0043] During operation, the worker places the slender tube 2 inside the existing cladding shell 1 for cladding. The worker turns on the external power supply, and the external second drive on the cladding shell 1 is energized and begins to rotate. The slender tube 2, which is clamped onto the cladding shell 1, rotates synchronously. The external first drive of sliding block 1 61 and sliding block 2 65 is energized and begins to slide. Sliding block 2 65 slides vertically inside sliding block 1 61 near the side wall of the slender tube 2 through groove 3 64. The vertical sliding of sliding block 2 65 drives the spring 3 51 fixedly connected to it to move vertically near the side wall of the slender tube 2. Spring 3 51 drives the lifting rod 52 fixedly connected to it to move synchronously. The lifting rod 52 drives the rotating shaft 41 fixedly connected to it to move synchronously. The rotating shaft 41 drives the rotating body 42 rotatably connected to it to move vertically closer to the side wall of the slender tube 2. The rotating body 42 drives the fixed shaft 46 fixedly connected to it to move synchronously. The fixed shaft 46 drives the roller 47 rotatably connected to it to move closer to the slender tube 2. When the roller 47 abuts against the rotating slender tube 2, the roller 47 rolls synchronously with the slender tube 2 during the rotation of the slender tube 2, preventing the rotating body 42 from directly abutting against it. Damaging the surface of the slender tube 2, according to the principle of mutual action of forces, the slender tube 2 exerts a reaction force on the roller 47, which in turn exerts a force on the fixed shaft 46 rotatably connected to it. Simultaneously, the fixed shaft 46 exerts a force on the rotating body 42 fixedly connected to it. The end of the rotating body 42 closest to the slender tube 2 rotates upwards about the rotating shaft 41 via the groove 59. Therefore, the end of the rotating body 42 furthest from the slender tube 2 rotates downwards via the groove 510. The spring 48 is pulled up by the rotating body 42 fixedly connected to it, and the end of the rotating body 42 furthest from the slender tube 2... The spring 43, which is fixedly connected inside, swings downward synchronously. The spring 43 drives the connecting rod 44, which is fixedly connected above, to swing downward synchronously. The connecting rod 44 drives the magnetic plate 45, which is fixedly connected above, to swing downward synchronously. The two magnetic plates 45 swing downward, changing both the horizontal and vertical directions. Therefore, the two magnetic plates 45 separate. The spring 43 drives the connecting rod 44 to slide in the inner cavity of the rotating body 42 through the elastic force. The connecting rod 44 drives the magnetic plate 45 to slide synchronously. The magnetic plate 45 moves and abuts against the side wall of the rotating body 42.

[0044] When the lifting rod 52 drives the roller 511 fixedly connected to it to contact the rolling slender tube 2, the roller 511 and the slender tube 2 rotate synchronously. According to the principle that forces act in concert, the slender tube 2 applies a reaction force to the roller 511. The roller 511 drives the lifting rod 52 fixedly connected to it to move upward. The lifting rod 52 drives the protrusion 53 fixedly connected to it to move synchronously. The protrusion 53 drives the swing rod 54, which meshes with it, to swing away from the laser nozzle 3. The swing rod 54 drives the connecting rod 55 fixedly connected to it to swing synchronously. The connecting rod 55 drives the metal powder spray pipe 57 fixedly connected to it to swing synchronously. At the same time, the sliding block 65 drives the thick rod 77 fixedly connected to it to move synchronously. The thick rod 77 slides to the bottom of the thin rod 76. When the end is reached, the thin rod 76 slides downward, and the thin rod 76 drives the connecting rod 75 fixedly connected to it to slide inside the fixed plate 78 through the opening 79. When the connecting rod 75 slides to the bottom of the opening 79, the connecting rod 75 drives the sliding rod 74 rotatably connected to it to start rotating. The connecting rod 75 drives the sliding rod 74 rotatably connected to it to slide to the bottom of the opening 79 simultaneously. The vertical direction of the sliding rod 74 changes. At this time, the transparent cover 72 rotates around the fixed column 71 as the axis, and then the transparent cover 72 covers the cladding equipment. When the lifting rod 52 rises and compresses the spring 51, it can no longer rise. The metal powder spray pipe 57 starts to spray the metal powder transported by the hose 56 onto the slender tube 2. The laser nozzle 3 sprays laser to start the work of cladding the slender tube 2.

[0045] Simultaneously, sliding block 61 begins to slide laterally, causing the connecting plate 62 fixedly connected to it to slide synchronously. The connecting plate 62, in turn, causes the powder collection box 63 fixedly connected to it to slide synchronously, thus facilitating the synchronous sliding of the powder collection box 63 and the laser nozzle 3. This makes it easier to recover the metal powder that has not been melted onto the slender tube 2, preventing the waste of unused metal powder. Sliding block 61 causes sliding block 65 to slide laterally, which in turn causes the thick rod 77 fixedly connected to it to move laterally synchronously. The thin rod 76 causes the connecting rod 75 fixedly connected to it to slide through the opening 79 into the interior of the fixed plate 78. The connecting rod 75 causes the sliding rod 74 rotatably connected to it to begin sliding through the groove 73 into the interior of the transparent cover 72. Sliding block 65 drives the laser nozzle 3 fixedly connected to it to slide horizontally in sync. When sliding block 61 slides to the end of the slender tube 2, sliding block 61 stops sliding, the metal powder nozzle 57 and the laser nozzle 3 stop working, sliding block 65 slides upward, roller 511 leaves the surface of the slender tube 2, the spring 51 compressed by the lifting rod 52 acts on the lifting rod 52, the lifting rod 52 moves vertically downward, the lifting rod 52 drives the protrusion 53 fixedly connected to it to move vertically downward in sync, the protrusion 53 drives the swing rod 54 meshing with it to swing towards the side closer to the laser nozzle 3, the swing rod 54 drives the connecting rod 55 fixedly connected to it to swing in sync, the connecting rod 55 drives the metal powder nozzle 57 ... The metal powder nozzle 57 swings synchronously. By adjusting the angle of the metal powder nozzle 57, the angle of the nozzle increases as it approaches the slender tube 2. Therefore, a larger opening angle allows the sprayed metal powder to cover more of the slender tube 2 at a closer distance, resulting in more complete cladding. The lifting rod 52 moves vertically upward, causing the rotating shaft 41 fixedly connected to it to move vertically upward synchronously. The rotating shaft 41 causes the rotating body 42, which is rotatably connected to it, to move vertically closer to the side wall of the slender tube 2. The rotating body 42 then causes the fixed shaft 46, which is fixedly connected to it, to move vertically upward synchronously. The fixed shaft 46 causes the roller 47, which is rotatably connected to it, to move away from the slender tube 2. When roller 47 disengages from the rotating slender tube 2, the elastic force of spring 48 extends and acts on the rotating body 42. The end of the rotating body 42 closest to the slender tube 2 swings downward around the rotating shaft 41, while the end furthest from the slender tube 2 swings upward around the rotating shaft 41. When the two magnetic plates 45 are back in the same horizontal position, they attract each other magnetically, and the upper surfaces of the two magnetic plates 45 again contact the laser nozzle 3. The rotating assembly 4 allows the magnetic plates 45 to open when the laser nozzle 3 is in use and to attract and adhere to each other when the laser nozzle 3 is not in use. This provides a covering effect when the laser nozzle 3 is not in use, preventing dust from entering the laser nozzle 3 when the cladding equipment is not in use.This prevents the laser nozzle 3 from being contaminated by dust. Simultaneously, the sliding block 65 drives the thick rod 77 fixedly connected to it to move synchronously. When the thick rod 77 slides to the bottom of the thin rod 76, it drives the thin rod 76 to slide upwards. The thin rod 76 drives the connecting rod 75 fixedly connected to it to slide inside the fixed plate 78 through the opening 79. When the connecting rod 75 slides to the end of the opening 79, it drives the sliding rod 74 rotatably connected to it to start rotating. The sliding rod 74 changes its vertical direction and moves upwards. At this time, the transparent cover 72 rotates upwards around the fixed column 71, and the transparent cover 72 tilts upwards. By setting the expansion component 7, the transparent cover 72 can cover the surface of the equipment during cladding, preventing laser from splashing onto the outside of the equipment and protecting the workers. After cladding, the transparent cover 72 can be opened again, making it convenient for workers to collect the clad slender tube 2 without having to manually open it.

[0046] After the cladding is completed, the staff will disconnect the power supply to the equipment and remove the slender tube 2 that has been clad.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0048] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elongate tube laser cladding apparatus comprising a cladding enclosure (1) characterised in that: The inner cavity of the cladding shell (1) is rotatably connected with an elongated tube (2), the inside of the cladding shell (1) is provided with a laser nozzle (3) for cladding the elongated tube (2), the inside of the cladding shell (1) is provided with a rotating assembly (4) for resisting the rotation of the elongated tube (2), the inside of the cladding shell (1) is provided with a lifting and lowering assembly (5) for resisting the lifting and lowering of the elongated tube (2), the inside of the cladding shell (1) is provided with a sliding assembly (6) for assisting the sliding of the laser nozzle (3) on the surface of the elongated tube (2), and the inside of the cladding shell (1) is provided with a support assembly (7) for preventing the laser nozzle (3) from being exposed and damaged. The lifting and lowering assembly (5) comprises a protrusion (53), a swing rod (54), a connecting rod two (55) and a metal powder nozzle (57), the protrusion (53) and the swing rod (54) are engaged with each other, one end of the swing rod (54) away from the protrusion (53) is fixedly connected to the connecting rod two (55), and the bottom end of the connecting rod two (55) is fixedly connected to the metal powder nozzle (57).

2. An elongated tube laser cladding apparatus as claimed in claim 1, wherein: The lifting and lowering assembly (5) further comprises a spring three (51), the bottom end of the spring three (51) is fixedly connected with a lifting rod (52), the side wall of the lifting rod (52) is fixedly connected to the side wall of the protrusion (53), the side wall of the laser nozzle (3) is fixedly connected with a fixed plate one (58), the outer surface of the fixed plate one (58) is rotatably connected with the swing rod (54), the top end of the laser nozzle (3) penetrates and is fixedly connected with a hose (56), the bottom end of the hose (56) is fixedly connected to the top end of the metal powder nozzle (57), the inside of the hose (56) and the inside of the metal powder nozzle (57) are in communication, the side wall of the lifting rod (52) away from the laser nozzle (3) is provided with a groove one (59), the side wall of the lifting rod (52) close to the laser nozzle (3) is provided with a groove two (510), and the bottom end of the lifting rod (52) is rotatably connected with a roller two (511).

3. The elongated tube laser cladding apparatus of claim 1, wherein: The rotating assembly (4) includes a rotating shaft (41), the rotating shaft (41) is fixedly connected to the inner wall of the lifting rod (52), the middle part of the rotating shaft (41) is rotatably connected with a rotating body (42), one end of the rotating body (42) away from the elongated tube (2) is provided with a cavity, the cavity of one end of the rotating body (42) away from the elongated tube (2) is fixedly connected with a spring (43), one end of the spring (43) away from the rotating shaft (41) is fixedly connected with a connecting rod (44), the connecting rod (44) is slidably arranged in the cavity of one end of the rotating body (42) away from the elongated tube (2), one end of the connecting rod (44) away from the rotating body (42) is fixedly connected with a magnetic plate (45), one end of the rotating body (42) close to the elongated tube (2) is fixedly connected with a fixed shaft (46), one side of the fixed shaft (46) away from the rotating body (42) is rotatably connected with a roller (47), the inner wall of the lifting rod (52) is fixedly connected with a spring (48), one end of the spring (48) close to the center of the inner cavity of the lifting rod (52) is fixedly connected to the side wall of the rotating body (42).

4. The elongated tube laser cladding apparatus of claim 1, wherein: The sliding assembly (6) further includes a sliding block (61), the sliding block (61) is slidably connected to the upper surface of the cladding shell (1), one side of the sliding block (61) close to the center of the upper surface of the cladding shell (1) is fixedly connected with a connecting plate (62), one end of the connecting plate (62) away from the sliding block (61) is fixedly connected with a powder collecting box (63), one side of the sliding block (61) close to the connecting plate (62) is provided with a groove (64), the upper surface of the laser nozzle (3) is fixedly connected with a sliding block (65), the sliding block (65) is vertically slidably arranged on one side of the sliding block (61) close to the connecting plate (62) through the groove (64).

5. An elongated tube laser cladding apparatus as defined in claim 4, wherein: The supporting assembly (7) includes a fixed column (71), the fixed column (71) is fixedly connected to the upper end of the cladding shell (1), the side wall of the fixed column (71) is rotatably connected with a transparent cover (72), one side of the transparent cover (72) close to the cladding shell (1) is provided with a groove (73), the transparent cover (72) is slidably connected with a sliding rod (74) through the groove (73), one end of the sliding rod (74) away from the transparent cover (72) is rotatably connected with a connecting rod (75), the side wall of the connecting rod (75) is fixedly connected with a thin rod (76), the top end of the sliding block (65) is fixedly connected with a thick rod (77), one end of the thin rod (76) away from the connecting rod (75) is slidably arranged in the inner cavity of the thick rod (77), the side wall of the fixed column (71) is fixedly connected with a fixed plate (78), the side wall of the fixed plate (78) is provided with an opening (79).

6. An elongated tube laser cladding apparatus as defined in claim 5, wherein: The side wall of the connecting rod (75) penetrates the inside of the fixed plate (78) through the opening (79).

7. The elongated tube laser cladding apparatus of claim 4, wherein: The powder collecting box (63) is slidably arranged on the upper surface of the cladding shell (1).

8. The elongated tube laser cladding apparatus of claim 4, wherein: The sliding block one (61) and the sliding block two (65) are driven and installed on the first external drive, and the sliding drive of the sliding block one (61) and the sliding block two (65) is in an electrical connection relationship with the external power supply.

9. The elongated tube laser cladding apparatus of claim 1, wherein: The cladding shell (1) is driven and installed on the second external drive, and the second external drive of the cladding shell (1) is in an electrical connection relationship with the external power supply.

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