Ball valve surface laser cladding positioning device

Abstract

The invention relates to the technical field of laser cladding, in particular to a ball valve surface laser cladding positioning device which comprises a base and a laser injection head, supporting rods are arranged on the two sides of the base correspondingly, positioning mechanisms are arranged on the outer side walls of the supporting rods, and through arrangement of mechanisms such as limiting pieces, the positioning mechanisms are arranged on the outer side walls of the supporting rods correspondingly. The telescopic rod can be positioned and supported when the telescopic rod drives the ball valve body to rotate through the three-jaw chuck, the rotating precision of the telescopic rod and the three-jaw chuck is guaranteed, and therefore the positioning precision of the device is improved; when the laser injector head conducts laser cladding, the cooling box can spray cold air to the bottom of the ball valve body through the air spraying opening, the heat conduction fins can absorb heat in the ball valve body, thermal deformation of the ball valve body caused by too high temperature during laser cladding is avoided, and therefore the positioning precision of the whole device is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cladding, and specifically provides a laser cladding positioning device for the surface of a ball valve. Background Art

[0002] For a long time, the ball valve is eroded by materials, which will cause serious impact wear. This not only affects normal use, but also shortens the service life of the ball valve itself. Currently, laser cladding technology can be used to repair the wear of the ball valve, enhance its wear resistance, restore its original vitality, and extend its service life. When laser cladding is performed on the ball valve, a positioning device is usually required for clamping and fixing.

[0003] During the long-term use of the ball valve, due to the erosion of the fluid, there may be cracks or fractures on its surface. Before laser cladding the ball valve, it is usually necessary to perform laser welding on the cracks or fractures of the ball valve before cladding repair can be carried out. Whether welding or laser cladding the ball valve, it is usually necessary to position and fix the ball valve, and then use a laser beam for exothermic processing. However, the existing positioning devices can usually only fix the ball valve and cannot protect and cool the ball valve. During the high-temperature welding or cladding process of the ball valve by the laser beam, if the ball valve is not cooled accordingly, the ball valve may undergo thermal deformation during the heating process of the laser beam. Once the ball valve undergoes thermal deformation, the shape of the ball valve will be irregular. Once the shape of the ball valve is irregular, when the positioning device drives the ball valve to rotate and laser cladding is performed on all sides of the ball valve, the inertial forces generated by different parts of the irregular-shaped ball valve may not be equal, resulting in the ball valve shaking, affecting the positioning accuracy of the positioning device. Moreover, after the ball valve is laser cladded, it is necessary to wait for the high-temperature ball valve to cool down before the positioning device can position and fix the next ball valve. However, the existing positioning devices lack a cooling mechanism and can only wait for natural cooling in the face of the high-temperature ball valve. The natural cooling speed is slow, which not only affects the use efficiency of the positioning device, but also during the slow natural cooling process, it is easy to cause the grains of the cladding layer to grow and the structure to coarsen. The coarsened structure will reduce the hardness and wear resistance of the cladding layer, thereby affecting the service life of the ball valve. Summary of the Invention

[0004] The purpose of the present invention is to provide a laser cladding positioning device for the surface of a ball valve, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A laser cladding positioning device for the surface of a ball valve, including a base and a laser jet head. Support rods are provided on both sides of the base, and a positioning mechanism is provided on the outer side wall of the support rod; The positioning mechanism includes a driving motor fixedly connected to the outer side wall of the base. The output end of the driving motor is provided with a telescopic rod. A turntable is sleeved on the outer side wall of the telescopic rod. Positioning tracks are provided on both sides of the turntable. Both sides of the inner part of the positioning track are slidably connected with limiting parts. A connecting arm is fixedly connected to the outer side wall of the limiting part. One end of the connecting arm far away from the positioning track is fixedly connected to the outer side wall of the support rod. A three-jaw chuck is installed at the end of the telescopic rod. A ball valve body is clamped on the three-jaw chuck. A positioning and cooling mechanism is arranged on the outer side wall of the support rod.

[0006] Preferably, the positioning and cooling mechanism includes a mounting plate fixedly connected between two support rods. A cooling box is fixedly connected to the outer side wall of the mounting plate. A plurality of air spraying openings are provided on the cooling box. A plurality of heat conducting fins are arranged on the cooling box.

[0007] Preferably, sliding plates are slidably arranged on both sides of the mounting plate. A fixing rod is fixedly connected to the outer side wall of the sliding plate. One end of the fixing rod far away from the sliding plate is fixedly connected to the outer side wall of the mounting plate. A friction part is arranged on the outer side wall of the sliding plate. The contact ends of the friction part and the side wall of the turntable are both made of frosted material. A heat conducting strip is arranged inside the sliding plate. The heat conducting strip is in contact with the friction part.

[0008] Preferably, a top cylinder is fixedly connected to the outer side wall of the mounting plate. A blocking plate is slidably connected to the inner side wall of the top cylinder. A pressing rod is fixedly connected to the outer side wall of the blocking plate. The pressing rod slidably penetrates to the outside of the top cylinder. A blocking plate is sleeved on one end of the pressing rod located inside the top cylinder. A heat conducting part is arranged inside the top cylinder. The heat conducting part is in sliding contact with the heat conducting strip.

[0009] Preferably, a ventilation box and a cooling air box are fixedly connected to the bottom of the base. Adding ports are arranged on the backs of the ventilation box and the cooling air box. A ventilation main pipe is communicated inside the ventilation box. A top pipe is communicated at the end of the ventilation main pipe. The end of the top pipe penetrates to the inside of the cooling box.

[0010] Preferably, a sliding pipe is slidably connected to the inner side wall of the top pipe. A plurality of limiting sliding rails are provided at the end of the sliding pipe. A convex block is slidably connected to the inner side wall of each of the plurality of limiting sliding rails. A shielding part is fixedly connected to the outer side wall of the convex block.

[0011] Preferably, a tension spring is fixedly connected to the outer side wall of the convex block. One end of the tension spring far away from the convex block is fixedly connected to the inner side wall of the limiting sliding rail. A top rod is fixedly connected to the outer side wall of the convex block. The top rod slidably penetrates to the outside of the limiting sliding rail. A roller is rotatably connected to one end of the top rod far away from the limiting sliding rail. A plurality of contact parts are arranged inside the top pipe. The outside of the contact part is in sliding contact with the roller.

[0012] Preferably, a pull rod is fixedly connected to the end of the sliding pipe, and the pull rod slides through the outside of the mounting plate and is fixedly connected to the end of the pressing rod.

[0013] Preferably, an air regulating pipe is communicated inside the cooling air box, a circulation box is communicated at the end of the air regulating pipe, the circulation box is communicated to the inside of the ventilation main pipe, and a baffle is slidably connected to the inner side wall of the circulation box.

[0014] Preferably, a through hole is formed in the baffle, a pressing spring is arranged on the outer side wall of the baffle, the other end of the pressing spring is fixedly connected to the outer side wall of the circulation box, and a micro suction fan is arranged inside the ventilation main pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the setting of mechanisms such as the limiting member, when the telescopic rod drives the ball valve body to rotate through the three-jaw chuck, the telescopic rod can be positioned and supported, ensuring the rotation accuracy of the telescopic rod and the three-jaw chuck, thereby improving the positioning accuracy of the device. At the same time, through the setting of mechanisms such as the cooling box, when the three-jaw chuck clamps and positions the ball valve body and the laser spraying head performs laser welding or cladding, the cooling box will not only spray cold air to the bottom of the ball valve body through the air outlet, but also the heat-conducting fins will absorb the heat inside the ball valve body, preventing the ball valve body from generating thermal deformation due to excessive temperature during laser beam heating, thereby ensuring the positioning accuracy of the entire device.

[0016] 2. Through the setting of mechanisms such as the top pipe, when the ball valve is laser-cladded, the top pipe will introduce cold air with different air volumes and temperatures into the cooling box according to the cooling stage of the ball valve, performing staged cooling on the ball valve body. While ensuring the cooling speed of the ball valve body, it can also gradually release the thermal stress generated inside the ball valve body due to high temperature, reducing the risk of cracks and deformation in the cladding layer, increasing the protection effect of the entire positioning device, and improving the success rate of positioning laser cladding of the ball valve body by the positioning device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention Figure 1 ; Figure 2 is Figure 1 an enlarged view of A in Figure 3 is a schematic diagram of the overall structure of the present invention Figure 2 ; Figure 4 is a schematic diagram of the overall structure of the present invention Figure 3 ; Figure 5 is a schematic plan view of the present invention; Figure 6 Schematic diagram of the local structure of the present invention; Figure 7 Schematic plan view of the top cylinder and the friction member of the present invention; Figure 8 Schematic diagram of the internal structure of the top cylinder of the present invention; Figure 9 Schematic diagram of the internal structure of the top pipe of the present invention Figure 1 ; Figure 10 Schematic diagram of the internal structure of the top pipe of the present invention Figure 2 ; Figure 11 is Figure 10 an enlarged view of B in

[0018] In the accompanying drawings, the list of components represented by each reference numeral is as follows: 1. Support rod; 2. Base; 3. Driving motor; 4. Telescopic rod; 5. Turntable; 6. Laser spraying head; 7. Ball valve body; 8. Positioning track; 9. Connecting arm; 10. Limiting member; 11. Three-jaw chuck; 12. Cooling box; 13. Air outlet; 14. Mounting plate; 15. Fixed rod; 16. Slide plate; 17. Friction member; 18. Top cylinder; 19. Air duct; 20. Flow box; 21. Baffle; 22. Pressing spring; 23. Through hole; 24. Heat conducting fin; 25. Main ventilation pipe; 26. Cooling air box; 27. Ventilation box; 28. Pull rod; 29. Heat conducting bar; 30. Top pipe; 31. Slide pipe; 32. Contact member; 33. Limiting slide rail; 34. Thrust rod; 35. Shielding member; 36. Protrusion; 37. Tension spring; 38. Pressing rod; 39. Heat conducting member; 40. Blocking disc; 41. Pressure spring. Specific embodiments

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figure 1 - Figure 10, A laser cladding positioning device for the surface of a ball valve, including a base 2 and a laser jet head 6. Support rods 1 are provided on both sides of the base 2. A positioning mechanism is provided on the outer side wall of the support rod 1. The positioning mechanism includes a driving motor 3 fixedly connected to the outer side wall of the base 2. The output end of the driving motor 3 is provided with a telescopic rod 4. A turntable 5 is sleeved on the outer side wall of the telescopic rod 4. Positioning tracks 8 are provided on both sides of the turntable 5. Limiting members 10 are slidably connected to both sides inside the positioning track 8. A connecting arm 9 is fixedly connected to the outer side wall of the limiting member 10. One end of the connecting arm 9 away from the positioning track 8 is fixedly connected to the outer side wall of the support rod 1. A three-jaw chuck 11 is installed at the end of the telescopic rod 4. A ball valve body 7 is clamped on the three-jaw chuck 11. A positioning and cooling mechanism is provided on the outer side wall of the support rod 1.

[0021] The positioning and cooling mechanism includes a mounting plate 14 fixedly connected between the two support rods 1. A cooling box 12 is fixedly connected to the outer side wall of the mounting plate 14. A plurality of air spray nozzles 13 are provided on the cooling box 12. A plurality of heat conducting fins 24 are provided on the cooling box 12.

[0022] Sliding plates 16 are slidably provided on both sides of the mounting plate 14. A fixing rod 15 is fixedly connected to the outer side wall of the sliding plate 16. One end of the fixing rod 15 away from the sliding plate 16 is fixedly connected to the outer side wall of the mounting plate 14. A friction member 17 is provided on the outer side wall of the sliding plate 16. The contact ends of the friction member 17 and the side wall of the turntable 5 are both made of frosted material. A heat conducting strip 29 is provided inside the sliding plate 16. The heat conducting strip 29 is in contact with the friction member 17.

[0023] A top cylinder 18 is fixedly connected to the outer side wall of the mounting plate 14. A blocking disk 40 is slidably connected to the inner side wall of the top cylinder 18. A pressing rod 38 is fixedly connected to the outer side wall of the blocking disk 40. The pressing rod 38 slides through to the outside of the top cylinder 18. One end of the pressing rod 38 located inside the top cylinder 18 is sleeved with the blocking disk 40. A heat conducting member 39 is provided inside the top cylinder 18. The heat conducting member 39 is in sliding contact with the heat conducting strip 29. A ventilation box 27 and a cooling air box 26 are fixedly connected to the bottom of the base 2. Filling ports are provided on the backs of the ventilation box 27 and the cooling air box 26. A ventilation main pipe 25 is communicated inside the ventilation box 27. A top pipe 30 is communicated at the end of the ventilation main pipe 25.

[0024] In this example, when in use, first, the operator can place the ball valve body 7 to be positioned and clamped between the two three-jaw chucks 11. After the ball valve body 7 is placed, the operator can then extend the two telescopic rods 4 to push the two three-jaw chucks 11 to close and contact both sides of the ball valve body 7, and then clamp and fix the ball valve body 7. After the ball valve body 7 is clamped, the operator can observe the cracks on the ball valve body 7. If there are cracks or fissures on the ball valve body 7, at this time, the operator can drive the laser jet head 6 to perform hot melting heating on the crack of the ball valve body 7 and the alloy material for repair through the mobile device externally connected to the laser jet head 6, so as to perform welding repair (this is the prior art and will not be elaborated too much). If there are no cracks on the ball valve body 7 and laser cladding is required, at this time, the operator can turn on the drive motors 3 on both sides to synchronously drive the two telescopic rods 4 to drive the corresponding three-jaw chucks 11 to rotate. When the telescopic rods 4 drive the clamped ball valve body 7 to rotate through the three-jaw chucks 11, the limit member 10 and the connecting arm 9 will perform a positioning support on the turntable 5, so as to ensure the rotation accuracy of the telescopic rods 4. When the ball valve body 7 rotates, at this time, the laser jet head 6 located above the ball valve body 7 can automatically adjust its position to perform laser cladding on the ball valve body 7 (this is the prior art and will not be elaborated too much).

[0025] When the laser jet head 6 performs laser cladding on the ball valve body 7, the operator can turn on the suction fan at the bottom of the ventilation main pipe 25 to suck the cold air stored in the ventilation box 27 into the sliding pipe 31, and then enter the cooling box 12 through the top pipe 30. The cold air entering the cooling box 12 will spray cold air towards the bottom of the ball valve body 7 through the air spray port 13. When the air spray port 13 sprays cold air, the heat conducting fins 24 will also absorb the heat inside the ball valve body 7 to prevent the ball valve body 7 from generating thermal deformation due to excessive temperature during laser cladding, so as to ensure the positioning accuracy of the entire device.

[0026] Embodiment Two: Please refer to Figure 1 - Figure 11 This embodiment further explains Embodiment One. The end of the top pipe 30 penetrates into the interior of the cooling box 12. The inner side wall of the top pipe 30 is slidably connected with a sliding pipe 31. A plurality of limit slide rails 33 are opened at the end of the sliding pipe 31. The inner side walls of the plurality of limit slide rails 33 are all slidably connected with bumps 36. A shielding member 35 is fixedly connected to the outer side wall of the bump 36.

[0027] A tension spring 37 is fixedly connected to the outer side wall of the bump 36. One end of the tension spring 37 away from the bump 36 is fixedly connected to the inner side wall of the limit slide rail 33. A push rod 34 is fixedly connected to the outer side wall of the bump 36. The push rod 34 slides through to the outside of the limit slide rail 33. A roller is rotatably connected to one end of the push rod 34 away from the limit slide rail 33. A plurality of contact members 32 are arranged inside the top pipe 30. The outside of the contact member 32 is in sliding contact with the roller. A pull rod 28 is fixedly connected to the end of the sliding pipe 31. The pull rod 28 slides through to the outside of the mounting plate 14 and is fixedly connected to the end of the pressing rod 38. An air duct 19 is communicated and arranged inside the cooling air box 26. One end of the air duct 19 is communicated and arranged with a circulation box 20. The circulation box 20 is communicated to the inside of the ventilation main pipe 25. A baffle 21 is slidably connected to the inner side wall of the circulation box 20. A through hole 23 is opened on the baffle 21. A pressing spring 22 is arranged on the outer side wall of the baffle 21. The other end of the pressing spring 22 is fixedly connected to the outer side wall of the circulation box 20. Miniature suction fans are arranged inside the ventilation main pipe 25.

[0028] In this embodiment, after the ball valve body 7 is laser cladded by the laser spray head 6, at this time, the operator can stop the laser spraying of the laser spray head 6 and instead make the fixed rod 15 contract. When the fixed rod 15 contracts, it will drive the slide plate 16 to move upward, so that the friction member 17 contacts the side surface of the turntable 5. Since the contact ends of the side surface of the turntable 5 and the friction member 17 are both made of frosted material, when the rotating turntable 5 contacts and rubs against the friction member 17, heat will be generated. The generated heat will be conducted by the heat conduction strip 29 to the heat conduction member 39, and finally the heat generated by the friction will be transported to the inside of the top cylinder 18 by the heat conduction member 39 (it should be noted that both the heat conduction strip 29 and the heat conduction member 39 are made of brass material and have strong heat conduction ability). Since the contact time between the side surface of the turntable 5 and the friction member 17 is short at this time, the cooling method for the ball valve body 7 still relies on the initial ventilation of the above-mentioned ventilation main pipe 25 to blow and cool the ball valve body 7.

[0029] Subsequently, as the friction time between the friction member 17 and the side surface of the turntable 5 increases, the heat conducted inside the ejector barrel 18 will become higher and higher. At this time, the higher heat will cause the mercury inside the ejector barrel 18 to undergo a thermal expansion reaction, making the mercury expand, thereby overcoming the elastic force of the pressure spring 41 and pushing the pressing rod 38 downward through the blocking disc 40. When the pressing rod 38 moves downward, it will synchronously push the sliding tube 31 downward through the pull rod 28. When the sliding tube 31 drives multiple ejector rods 34 to move downward into the main ventilation pipe 25, the rollers at the ends of the ejector rods 34 will always be in contact with the inclined surface of the contact member 32 under the pulling force of the tension spring 37. As the sliding tube 31 slowly moves downward, the ejector rods 34 will slowly drive the convex blocks 36 and the shielding members 35 to move outward of the sliding tube 31 during the process of moving downward and contacting the inclined surface of the contact member 32. When multiple shielding members 35 all slowly move outward and open, at this time, the blocking area of the multiple shielding members 35 on the end of the sliding tube 31 will be reduced compared with before. At this time, the ventilation volume from the main ventilation pipe 25 to the inside of the cooling box 12 through the sliding tube 31 will be increased compared with before. By increasing the ventilation volume, the cooling efficiency of the ball valve body 7 can be further improved.

[0030] Based on the above principle, when cooling the ball valve body 7, the friction part 17 and the side wall of the turntable 5 are always in frictional contact. As the friction time further increases, the heat conducted into the inside of the top cylinder 18 will further increase in temperature. At this time, the mercury in the top cylinder 18 will expand violently again, thereby pushing the pressing rod 38 to move downward again through the blocking plate 40. When the pressing rod 38 continues to move downward, it will push the sliding pipe 31 to move a greater distance into the ventilation main pipe 25. When the sliding pipe 31 drives multiple ejector rods 34 to move to the bottom of the contact part 32, at this time, the ejector rods 34 in contact with the bottom of the contact part 32 will drive multiple shielding parts 35 to expand outward again under the pulling force of the tension spring 37. When the multiple shielding parts 35 expand outward again, the blocking amount of the end of the sliding pipe 31 will be reduced again. At this time, the ventilation volume of the sliding pipe 31 will increase again compared with before. When the pressing rod 38 moves downward at a long distance, in addition to pressing the sliding pipe 31 to move into the ventilation main pipe 25 through the pull rod 28, it will also contact and press the baffle plate 21, pushing the baffle plate 21 downward below the flow box 20, so that the through hole 23 originally located outside the flow box 20 enters the flow box 20. When the through hole 23 enters the flow box 20, the cooler cold air stored in the cooling air box 26 will enter the ventilation main pipe 25 through the air duct 19 and then through the flow box 20, and mix inside the ventilation main pipe 25, making the cold air transported by the ventilation main pipe 25 to the inside of the cooling box 12 have a lower temperature. When the cold air transported by the ventilation main pipe 25 has a lower temperature and a larger air volume than before, the cooling rate of the ball valve body 7 can be further increased. By gradually increasing the air volume and reducing the temperature of the cold air in stages, the ball valve body 7 can be cooled in stages, ensuring the cooling speed of the ball valve body 7, while gradually releasing the thermal stress generated inside the ball valve body 7 due to high temperature, reducing the risk of cracks and deformation of the cladding layer, increasing the protection effect of the entire positioning device, and improving the success rate of positioning laser cladding of the ball valve body 7 by the positioning device.

[0031] It should be noted that during the laser cladding of the ball valve body 7, the cooling air volume of the ball valve body 7 is small, and the bottom of the ball valve body 7 is blown with air, and the air does not directly contact the laser emitted by the laser injection head 6, so it will not affect the laser cladding. Moreover, the cold air ejected from the cooling box 12 has been pre-treated in the cooling air box 26 and the ventilation box 27 in advance, without impurities and will not affect the cladding effect.

[0032] It should be noted that when welding and repairing the ball valve body 7, the cooling box 12 will also introduce cooling air for cooling as in the cladding process.

[0033] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ball valve surface laser cladding positioning device, comprising a base (2) and a laser jet head (6), characterized in that: Support rods (1) are provided on both sides of the base (2), and positioning mechanisms are provided on the outer side walls of the support rods (1); The positioning mechanism comprises a driving motor (3) fixedly connected to the outer wall of the base (2); a telescopic rod (4) is arranged at the output end of the driving motor (3); a turntable (5) is sleeved on the outer wall of the telescopic rod (4); positioning tracks (8) are provided on both sides of the turntable (5); both sides of the interior of the positioning track (8) are slidably connected to a limiting member (10); a connecting arm (9) is fixedly connected to the outer wall of the limiting member (10); one end of the connecting arm (9) away from the positioning track (8) is fixedly connected to the outer wall of the support rod (1); a three-jaw chuck (11) is installed at the end of the telescopic rod (4); a ball valve body (7) is clamped on the three-jaw chuck (11); and a positioning and cooling mechanism is arranged on the outer wall of the support rod (1).

2. A ball valve surface laser cladding positioning device according to claim 1, characterized in that: The positioning and cooling mechanism comprises a mounting plate (14) fixedly connected between two support rods (1), a cooling box (12) fixedly connected to an outer wall of the mounting plate (14), a plurality of air outlets (13) being provided on the cooling box (12), and a plurality of heat-conducting fins (24) being provided on the cooling box (12).

3. A ball valve surface laser cladding positioning device according to claim 2, characterized in that: Slide plates (16) are slidably arranged on both sides of the mounting plate (14); a fixing rod (15) is fixedly connected to the outer wall of the slide plate (16); one end of the fixing rod (15) away from the slide plate (16) is fixedly connected to the outer wall of the mounting plate (14); a friction member (17) is arranged on the outer wall of the slide plate (16); the contact end of the friction member (17) and the side wall of the turntable (5) are both made of frosted material; a heat conducting strip (29) is arranged inside the slide plate (16); the heat conducting strip (29) is in contact with the friction member (17).

4. A ball valve surface laser cladding positioning device according to claim 2, characterized in that: A top cylinder (18) is fixedly connected to the outer wall of the mounting plate (14), a blocking plate (40) is slidably connected to the inner wall of the top cylinder (18), a pressing rod (38) is fixedly connected to the outer wall of the blocking plate (40), the pressing rod (38) slides through the outside of the top cylinder (18), one end of the pressing rod (38) located inside the top cylinder (18) is sleeved with the blocking plate (40), a heat conducting member (39) is arranged inside the top cylinder (18), and the heat conducting member (39) is in sliding contact with the heat conducting strip (29).

5. The ball valve surface laser cladding positioning device according to claim 1, characterized in that: The bottom of the base (2) is fixedly connected to a ventilation box (27) and a cooling wind box (26); the backs of the ventilation box (27) and the cooling wind box (26) are both provided with a supply port; the interior of the ventilation box (27) is connected to a ventilation main pipe (25); the end of the ventilation main pipe (25) is connected to a top pipe (30); the end of the top pipe (30) passes through the interior of the cooling box (12).

6. A ball valve surface laser cladding positioning device according to claim 5, characterized in that: The inner side wall of the top tube (30) is slidably connected to a slide tube (31), the end of the slide tube (31) is provided with a plurality of limit slide rails (33), the inner side walls of the plurality of limit slide rails (33) are slidably connected to a protrusion (36), and the outer side wall of the protrusion (36) is fixedly connected to a shielding member (35).

7. A ball valve surface laser cladding positioning device according to claim 6, characterized in that: A tension spring (37) is fixedly connected to the outer wall of the protrusion (36); one end of the tension spring (37) away from the protrusion (36) is fixedly connected to the inner wall of the limiting slide rail (33); a push rod (34) is fixedly connected to the outer wall of the protrusion (36); the push rod (34) slides through the outside of the limiting slide rail (33); one end of the push rod (34) away from the limiting slide rail (33) is rotatably connected to a roller; a plurality of contact members (32) are arranged inside the top tube (30); the outside of the contact members (32) is in sliding contact with the roller.

8. The ball valve surface laser cladding positioning device according to claim 6, characterized in that: The end of the sliding tube (31) is fixedly connected to a pull rod (28), and the pull rod (28) slides through the outside of the mounting plate (14) and is fixedly connected to the end of the pressing rod (38).

9. The ball valve surface laser cladding positioning device according to claim 5, characterized in that: The interior of the cooling air box (26) is connected to an air regulating pipe (19), the end of the air regulating pipe (19) is connected to a flow box (20), the flow box (20) is connected to the interior of the ventilation main pipe (25), and the inner side wall of the flow box (20) is slidably connected to a baffle (21).

10. A ball valve surface laser cladding positioning device according to claim 9, characterized in that: The baffle plate (21) is provided with a through hole (23), the outer wall of the baffle plate (21) is provided with a pressing spring (22), the other end of the pressing spring (22) is fixedly connected to the outer wall of the circulation box (20), and a micro suction fan is provided inside the ventilation main pipe (25).

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