A laser welding device for fire-fighting equipment with a coating

Abstract

This invention relates to the field of laser welding technology, and more particularly to a laser welding device for fire-fighting equipment with coatings. The device includes a main body plate, with a first connecting plate fixedly connected to the upper end of the main body plate. A clamping and grinding mechanism is provided on the side of the first connecting plate. The clamping and grinding mechanism includes a first placement groove formed on the side of the first connecting plate. A first connecting body is fixedly connected to the first connecting plate within the first placement groove. A first empty groove is formed on the side of the first connecting body. A welding mechanism is provided on the side of the first connecting plate. A sealing and heat dissipation mechanism for sealing the inner wall of the tank is provided at the lower end of the main body plate. When the gas storage tank is activated, inert gas is delivered to the flexible retaining ring through a gas supply pipe, thereby filling the weld area with inert gas both inside and out. While providing an inert seal, the flowing gas can dissipate the heat generated during welding.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, and in particular to a laser welding apparatus for fire-fighting equipment with coatings. Background Technology

[0002] Laser welding of coated rotating fire-fighting equipment is mainly used for circumferential seam connections of rotating pressure-bearing fire-fighting components with anti-corrosion coatings, such as fire extinguisher cylinders and fire gas cylinders. The principle is to use a high-energy-density laser beam to focus and melt the base material, and achieve continuous welding by coordinating with the rotation of the workpiece. At the same time, pretreatment is used to avoid welding defects caused by coating vaporization. Compared with traditional welding, it has the advantages of small thermal deformation, dense weld, good sealing, high welding efficiency, adaptability to the processing of coated workpieces, and meeting the pressure-bearing safety requirements of fire-fighting equipment.

[0003] For some fire extinguisher cylinders and gas cylinders, the inner wall of the shell is generally coated with an anti-corrosion coating. When welding these cylinders using existing laser welding technology, the temperature during the outer shell welding is much higher than the melting point of the inner anti-corrosion coating. Existing technology cannot achieve both inert sealing and rapid heat dissipation at the weld joint, leading to the melting of the inner wall during welding and reducing the protective performance of the inner wall of the cylinder. When grinding fire extinguisher cylinders, existing technology generally grinds the weld joints separately. For weld joints with small gaps, existing technology cannot weld such minor defects, resulting in high welding costs. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a laser welding device for fire-fighting equipment with coatings.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a laser welding device for fire-fighting equipment with coating, comprising a main body plate, a first connecting plate fixedly connected to the upper end of the main body plate, a clamping and grinding mechanism provided on the side of the first connecting plate, the clamping and grinding mechanism including a first placement groove opened on the side of the first connecting plate, a first connecting body fixedly connected to the first connecting plate in the first placement groove, a first empty groove opened on the side of the first connecting body, a dual-axis electric telescopic rod fixedly connected to the first connecting body in the first empty groove, a second connecting plate fixedly connected to the telescopic ends of the dual-axis electric telescopic rod, a second fixing body fixedly connected to the ends of the two second connecting plates, a welding mechanism provided on the side of the first connecting plate, and a sealing and heat dissipation mechanism for sealing the inner wall of the tank provided at the lower end of the main body plate.

[0006] Preferably, the inner surfaces of the two second fixing bodies are respectively provided with arc-shaped structures, and the two second fixing bodies are respectively provided with a plurality of circumferentially arranged second slots in the arc-shaped structures. The two second fixing bodies are respectively fixedly connected with second electric telescopic rods in the second slots, and the second fixing bodies are provided with third slots that are connected in the two upper second slots.

[0007] Preferably, a first motor is fixedly connected to each of the third slots, the drive shaft ends of the first motors are fixedly connected to the ends of the second electric telescopic rods, and the telescopic ends of the second electric telescopic rods are fixedly connected to a third fixing body.

[0008] Preferably, a second motor is fixedly connected to the side of each of the third fixing bodies, and a roller is fixedly connected to the drive shaft end of each of the second motors.

[0009] Preferably, a first fixing body is fixedly connected to the side of the dual-axis electric telescopic rod, a first electric telescopic rod is fixedly connected to the side of the first fixing body, a fourth fixing body is fixedly connected to the telescopic end of the first electric telescopic rod, a third motor is fixedly connected to the side of the fourth fixing body, a first rotating body is fixedly connected to the drive shaft end of the third motor, a second placement groove is provided on the side of the first rotating body, a fourth motor is fixedly connected to the first rotating body in the second placement groove, and a grinding rod is fixedly connected to the drive shaft end of the fourth motor.

[0010] Preferably, the sealing and heat dissipation mechanism includes a through hole on the end face of the main body plate, a fourth electric telescopic rod is fixedly connected to the main body plate in the through hole, a connecting block is fixedly connected to the telescopic end of the fourth electric telescopic rod, a sixth fixing body is fixedly connected to the upper end of the connecting block, the upper end of the sixth fixing body is an open structure, a sixth motor is fixedly connected to the side of the sixth fixing body, a second rotating body is fixedly connected to the drive shaft end of the sixth motor, and a fifth electric telescopic rod is fixedly connected to the side of the second rotating body.

[0011] Preferably, the telescopic end of the fifth electric telescopic rod is fixedly connected to a seventh fixing body, a cavity is opened on one side of the seventh fixing body, an air storage tank is fixedly connected to the upper end of the main body plate, and a connection hole communicating with the cavity is opened at the lower end of the seventh fixing body. The connection hole is connected to the air storage tank through an air supply pipe.

[0012] Preferably, a flexible retaining ring is fixedly connected to the inner side of the seventh fixed body, and a seventh electric telescopic rod is symmetrically connected to the inner side of the seventh fixed body. A first pressure sensor is fixedly connected to the telescopic ends of the two seventh electric telescopic rods, and a fixed shell is fixedly connected to the ends of the two first pressure sensors. One side of the two fixed shells is an open structure, and a seventh motor is provided at the ends of the two fixed shells. A grinding roller is fixedly connected to the drive shaft ends of the two seventh motors.

[0013] Preferably, the welding mechanism includes a fourth slot formed on the side of the first connecting plate, a fifth motor is fixedly connected to the first connecting plate in the fourth slot, a threaded rod is fixedly connected to the drive shaft end of the fifth motor, a fifth fixing body is fitted on the side of the threaded rod, the side of the fifth fixing body is slidably fitted with the fourth slot, and a support frame is fixedly connected to the lower end of the main plate.

[0014] Preferably, the fifth fixing body has a third placement groove at its end, and a third electric telescopic rod is fixedly connected to the fifth fixing body in the third placement groove. A support body is fixedly connected to the telescopic end of the third electric telescopic rod, and a laser welding head is rotatably connected to the lower end of the support body through a stepper motor.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The first electric telescopic rod drives the fourth fixed body to move towards the weld seam of the welded parts. Then, the two first motors located above and below drive the rollers to rotate to the horizontal direction, thereby ensuring that the upper and lower rollers drive the two welded parts to rotate at a uniform speed. At this time, the roller located in the middle can drive the welded parts to move up and down. The first electric telescopic rod drives the grinding rod to the weld seam. Then, the fourth motor starts and drives the grinding rod to rotate, thereby grinding the weld seam. Since there are several pressure sensors on the side of the grinding rod, when the grinding rod detects that the weld seam of the two welded parts has complementary grooves and protrusions, the rollers control the welded parts to move up and down, ensuring that the grinding rod can completely grind the weld seam, ensuring that the ground weld seam is completely fitted, improving the welding quality and reducing the welding cost.

[0017] 2. The fifth electric telescopic rod drives the seventh fixed body to move until the flexible retaining ring on the side of the seventh fixed body contacts the inner side of the welded part. At this time, the two seventh electric telescopic rods extend, and the seventh electric telescopic rods drive the fixed shell to a position close to the inner side of the welded part. Then, the seventh motor starts and drives the grinding roller to rotate. Then, under the rotation of the welded part, the inside of the weld is ground smooth. At the same time, the connecting hole at the lower end of the seventh fixed body is connected to the gas storage tank through the gas supply pipe. When the fifth motor drives the threaded rod to rotate, the threaded rod cooperates to drive the fifth fixed body to a position close to the weld. Then, the stepper motor drives the end of the laser welding head to move to the weld. At this time, the gas storage tank starts and delivers inert gas to the flexible retaining ring through the gas supply pipe, thereby achieving the goal of filling the weld area with inert gas inside and out. While providing inert sealing, the flowing gas can carry away the heat generated during welding, improving the welding quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is an overall sectional view of the present invention;

[0020] Figure 3 This is a partial structural diagram of the present invention;

[0021] Figure 4 This is a partial cross-sectional view of the present invention;

[0022] Figure 5 For the present invention Figure 2 Enlarged view of point A;

[0023] Figure 6 For the present invention Figure 2 Enlarged view of point B;

[0024] Figure 7 For the present invention Figure 2 Enlarged view of point C;

[0025] Figure 8 For the present invention Figure 2 Enlarged view of point D.

[0026] 1. Main body plate; 2. Clamping and grinding mechanism; 3. Welding mechanism; 4. Sealing and heat dissipation mechanism; 11. First connecting plate; 12. Support frame; 21. First placement slot; 22. First connecting body; 23. First empty slot; 24. Dual-axis electric telescopic rod; 25. Second connecting plate; 26. First electric telescopic rod; 27. First fixing body; 28. Second fixing body; 29. ​​Second empty slot; 210. Third empty slot; 211. First motor; 212. Second electric telescopic rod; 214. Roller; 215. Third fixing body; 216. Second motor; 217. Fourth fixing body; 218. Third motor; 219. First rotating body; 220. Second placement slot ; 221, Fourth motor; 222, Grinding rod; 31, Fourth slot; 32, Support body; 33, Laser welding head; 34, Fifth motor; 35, Threaded rod; 36, Fifth fixing body; 37, Third placement slot; 38, Third electric telescopic rod; 41, Through hole; 42, Fourth electric telescopic rod; 43, Connecting block; 44, Sixth fixing body; 45, Sixth motor; 47, Second rotating body; 48, Fifth electric telescopic rod; 49, Gas storage tank; 410, Seventh fixing body; 411, Cavity; 412, Flexible retaining ring; 413, Seventh electric telescopic rod; 414, Fixing shell; 415, Grinding roller; 416, Seventh motor; 417, Connecting hole. Detailed Implementation

[0027] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0028] Please see Figure 1 - Figure 8 A laser welding device for fire-fighting equipment with coatings includes a main body plate 1, characterized in that: a first connecting plate 11 is fixedly connected to the upper end of the main body plate 1, and a clamping and grinding mechanism 2 is provided on the side of the first connecting plate 11.

[0029] In this embodiment, the clamping and grinding mechanism 2 includes a first placement groove 21 formed on the side of the first connecting plate 11. A first connecting body 22 is fixedly connected to the first connecting plate 11 in the first placement groove 21. A first empty groove 23 is formed on the side of the first connecting body 22. A dual-axis electric telescopic rod 24 is fixedly connected to the first connecting body 22 in the first empty groove 23. The telescopic ends of the dual-axis electric telescopic rod 24 are respectively fixedly connected to second connecting plates 25. The ends of the two second connecting plates 25 are respectively fixedly connected to second fixing bodies 28.

[0030] The inner sides of the two second fixing bodies 28 are respectively provided with arc-shaped structures. The two second fixing bodies 28 are respectively provided with a number of circumferentially arranged second slots 29 in the arc-shaped structures. The two second fixing bodies 28 are respectively fixedly connected with second electric telescopic rods 212 in the second slots 29. The second fixing bodies 28 have a third slot 210 that is connected in the two upper second slots 29.

[0031] A first motor 211 is fixedly connected to each of the third slots 210. The drive shaft ends of the first motors 211 are fixedly connected to the ends of the second electric telescopic rods 212. The telescopic ends of the second electric telescopic rods 212 are fixedly connected to the third fixing bodies 215.

[0032] A second motor 216 is fixedly connected to the side of each of the third fixing bodies 215, and a roller 214 is fixedly connected to the drive shaft end of each of the second motors 216.

[0033] The dual-axis electric telescopic rod 24 is fixedly connected to a first fixing body 27 on its side. The first fixing body 27 is fixedly connected to a first electric telescopic rod 26 on its side. The telescopic end of the first electric telescopic rod 26 is fixedly connected to a fourth fixing body 217. The fourth fixing body 217 is fixedly connected to a third motor 218 on its side. The drive shaft end of the third motor 218 is fixedly connected to a first rotating body 219. The side of the first rotating body 219 is provided with a second placement groove 220. The first rotating body 219 is fixedly connected to a fourth motor 221 in the second placement groove 220. The drive shaft end of the fourth motor 221 is fixedly connected to a grinding rod 222.

[0034] Specifically, several second electric telescopic rods 212 drive the rollers 214 inside the third fixed body 215 to contact the sides of the welded parts at both ends. Then, when the two welded parts need to move up and down, the first motor 211 starts and drives the rollers 214 to rotate to the vertical direction. Then, several second motors 216 start and drive the rollers 214 to rotate. The rollers 214 drive the welded parts to move. When the two welded parts have moved a certain distance, the first electric telescopic rod 26 extends and drives the fourth fixed body 217 to move towards the weld seam of the welded parts. Then, the two first motors 211 located above and below drive the rollers 214 to rotate to the horizontal direction, thereby ensuring that the upper and lower rollers 214 drive the two welded parts to rotate at a uniform speed.

[0035] In this embodiment, a welding mechanism 3 is provided on the side of the first connecting plate 11.

[0036] The welding mechanism 3 includes a fourth slot 31 formed on the side of the first connecting plate 11. A fifth motor 34 is fixedly connected to the first connecting plate 11 in the fourth slot 31. A threaded rod 35 is fixedly connected to the drive shaft end of the fifth motor 34. A fifth fixing body 36 is provided on the side of the threaded rod 35. The side of the fifth fixing body 36 is slidably engaged with the fourth slot 31. A support frame 12 is fixedly connected to the lower end of the main body plate 1.

[0037] The fifth fixing body 36 has a third placement groove 37 at its end. The fifth fixing body 36 is fixedly connected to a third electric telescopic rod 38 in the third placement groove 37. The telescopic end of the third electric telescopic rod 38 is fixedly connected to a support body 32. The lower end of the support body 32 is rotatably connected to a laser welding head 33 via a stepper motor.

[0038] Specifically, the fifth motor 34 drives the threaded rod 35 to rotate, and the threaded rod 35 in turn drives the fifth fixed body 36 to move to a position close to the weld. Then, the stepper motor drives the end of the laser welding head 33 to move to the weld.

[0039] In this embodiment, the lower end of the main body plate 1 is provided with a sealing and heat dissipation mechanism 4 for sealing the inner wall of the tank.

[0040] The sealing and heat dissipation mechanism 4 includes a through hole 41 on the end face of the main body plate 1. A fourth electric telescopic rod 42 is fixedly connected to the main body plate 1 in the through hole 41. A connecting block 43 is fixedly connected to the telescopic end of the fourth electric telescopic rod 42. A sixth fixing body 44 is fixedly connected to the upper end of the connecting block 43. The upper end of the sixth fixing body 44 is an open structure. A sixth motor 45 is fixedly connected to the side of the sixth fixing body 44. A second rotating body 47 is fixedly connected to the drive shaft end of the sixth motor 45. A fifth electric telescopic rod 48 is fixedly connected to the side of the second rotating body 47.

[0041] The telescopic end of the fifth electric telescopic rod 48 is fixedly connected to a seventh fixing body 410. A cavity 411 is opened on one side of the seventh fixing body 410. An air storage tank 49 is fixedly connected to the upper end of the main body plate 1. A connecting hole 417 communicating with the cavity 411 is opened at the lower end of the seventh fixing body 410. The connecting hole 417 is connected to the air storage tank 49 through an air supply pipe.

[0042] A flexible retaining ring 412 is fixedly connected to the inner side of the seventh fixing body 410. Seventh electric telescopic rods 413 are symmetrically connected to the inner side of the seventh fixing body 410. First pressure sensors are fixedly connected to the telescopic ends of the two seventh electric telescopic rods 413 respectively. Fixed housings 414 are fixedly connected to the ends of the two first pressure sensors respectively. One side of the two fixed housings 414 is an open structure. Seventh motors 416 are respectively provided at the ends of the two fixed housings 414. Grinding rollers 415 are fixedly connected to the drive shaft ends of the two seventh motors 416 respectively.

[0043] Specifically, the fourth electric telescopic rod 42 drives the sixth fixed body 44 to move into the lower welded part through the connecting block 43. Then, the sixth motor 45 drives the second rotating body 47 to rotate, and the second rotating body 47 drives the fifth electric telescopic rod 48 to rotate to the horizontal direction. Then, the fifth electric telescopic rod 48 extends and drives the seventh fixed body 410 to move until the flexible retaining ring 412 on the side of the seventh fixed body 410 contacts the inner side of the welded part.

[0044] In use, the device is placed on a horizontal surface via the support frame 12. The two sections to be welded are then placed on the side of the second fixed body 28. Simultaneously, several second electric telescopic rods 212 extend, each driving a roller 214 inside the third fixed body 215 to contact the sides of the welded sections. When the two welded sections need to move up and down, the first motor 211 starts, rotating the roller 214 to a vertical position. Then, several second motors 216 start, rotating the roller 214, which in turn moves the welded sections. After the two welded sections have moved a certain distance, the first electric telescopic rod 26 extends, moving the fourth fixed body 217 towards the weld seam of the welded sections. The first motor 211, located at the top and bottom, drives the roller 214 to rotate horizontally, ensuring that the two rollers 214 drive the two welded parts to rotate at a uniform speed. At this time, the middle roller 214 can drive the welded part to move up and down. The first electric telescopic rod 26 drives the grinding rod 222 to the weld. Then, the fourth motor 221 starts and drives the grinding rod 222 to rotate, thereby grinding the weld. Since the grinding rod 222 is equipped with several pressure sensors on its side, when the grinding rod 222 detects that the weld of the two welded parts has complementary grooves and protrusions, it controls the welded parts to move up and down through the roller 214 to ensure that the grinding rod 222 can completely grind the weld, ensuring that the ground weld is completely fitted, improving the welding quality and reducing the welding cost.

[0045] After grinding, the lower end of the lower welded part generally has an opening structure. The fourth electric telescopic rod 42 extends, and the fourth electric telescopic rod 42 drives the sixth fixed body 44 to move into the lower welded part through the connecting block 43. Then, the sixth motor 45 drives the second rotating body 47 to rotate, and the second rotating body 47 drives the fifth electric telescopic rod 48 to rotate to the horizontal direction. Then, the fifth electric telescopic rod 48 extends, and the fifth electric telescopic rod 48 drives the seventh fixed body 410 to move until the flexible retaining ring 412 on the side of the seventh fixed body 410 contacts the inner side of the welded part. At this time, the two seventh electric telescopic rods 413 extend, and the seventh electric telescopic rods 413 drive the fixed shell 414 to move to a position close to the inner side of the welded part. Then the sixth electric telescopic rod 42 extends, and the seventh electric telescopic rod 413 drives the fixed shell 414 to a position close to the inner side of the welded part. The seventh motor 416 starts, driving the grinding roller 415 to rotate. Then, under the rotation of the welded part, the inside of the weld is ground smooth. At the same time, the connecting hole 417 at the lower end of the seventh fixing body 410 is connected to the gas storage tank 49 through the gas supply pipe. When the fifth motor 34 drives the threaded rod 35 to rotate, the threaded rod 35 cooperates to move the fifth fixing body 36 to a position close to the weld. Then, the stepper motor drives the end of the laser welding head 33 to move to the weld. At this time, the gas storage tank 49 starts, delivering inert gas to the flexible retaining ring 412 through the gas supply pipe, thereby achieving the filling of the weld with inert gas inside and outside. While achieving inert sealing, the flowing gas can carry away the heat generated during welding, improving the welding quality.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A laser welding device for fire-fighting equipment with coatings, comprising a main body plate (1), characterized in that: The upper end of the main plate (1) is fixedly connected to a first connecting plate (11). The side of the first connecting plate (11) is provided with a clamping and grinding mechanism (2). The clamping and grinding mechanism (2) includes a first placement groove (21) opened on the side of the first connecting plate (11). The first connecting plate (11) is fixedly connected to a first connecting body (22) in the first placement groove (21). The side of the first connecting body (22) is provided with a first empty groove (23). The first connecting body (22) is fixedly connected to a dual-axis electric telescopic rod (24) in the first empty groove (23). The telescopic ends of the dual-axis electric telescopic rod (24) are respectively fixedly connected to a second connecting plate (25). The ends of the two second connecting plates (25) are respectively fixedly connected to a second fixing body (28). The side of the first connecting plate (11) is provided with a welding mechanism (3). The lower end of the main plate (1) is provided with a sealing and heat dissipation mechanism (4) for sealing the inner wall of the tank.

2. The laser welding device for fire-fighting equipment with coatings according to claim 1, characterized in that: The inner sides of the two second fixing bodies (28) are respectively provided with arc-shaped structures. The two second fixing bodies (28) are respectively provided with several circumferentially arranged second slots (29) in the arc-shaped structures. The two second fixing bodies (28) are respectively fixedly connected with second electric telescopic rods (212) in the second slots (29). The second fixing bodies (28) are connected to the two second slots (29) located above by a third slot (210).

3. The laser welding device for fire-fighting equipment with coatings according to claim 2, characterized in that: A first motor (211) is fixedly connected to each of the third slots (210). The transmission shaft ends of the first motors (211) are fixedly connected to the ends of the second electric telescopic rods (212). The telescopic ends of the second electric telescopic rods (212) are fixedly connected to the third fixing bodies (215).

4. The laser welding device for fire-fighting equipment with coatings according to claim 3, characterized in that: A second motor (216) is fixedly connected to the side of each of the third fixing bodies (215), and a roller (214) is fixedly connected to the drive shaft end of each of the second motors (216).

5. A laser welding device for fire-fighting equipment with coatings according to claim 1, characterized in that: The dual-axis electric telescopic rod (24) is fixedly connected to a first fixed body (27) on its side. The first fixed body (27) is fixedly connected to a first electric telescopic rod (26) on its side. The telescopic end of the first electric telescopic rod (26) is fixedly connected to a fourth fixed body (217). The fourth fixed body (217) is fixedly connected to a third motor (218) on its side. The drive shaft end of the third motor (218) is fixedly connected to a first rotating body (219). The side of the first rotating body (219) is provided with a second placement groove (220). The first rotating body (219) is fixedly connected to a fourth motor (221) in the second placement groove (220). The drive shaft end of the fourth motor (221) is fixedly connected to a grinding rod (222).

6. The laser welding device for fire-fighting equipment with coatings according to claim 1, characterized in that: The sealing and heat dissipation mechanism (4) includes a through hole (41) on the end face of the main body plate (1). A fourth electric telescopic rod (42) is fixedly connected to the main body plate (1) in the through hole (41). A connecting block (43) is fixedly connected to the telescopic end of the fourth electric telescopic rod (42). A sixth fixing body (44) is fixedly connected to the upper end of the connecting block (43). The upper end of the sixth fixing body (44) is an open structure. A sixth motor (45) is fixedly connected to the side of the sixth fixing body (44). A second rotating body (47) is fixedly connected to the drive shaft end of the sixth motor (45). A fifth electric telescopic rod (48) is fixedly connected to the side of the second rotating body (47).

7. A laser welding device for fire-fighting equipment with coatings according to claim 6, characterized in that: The telescopic end of the fifth electric telescopic rod (48) is fixedly connected to a seventh fixing body (410). A cavity (411) is opened on one side of the seventh fixing body (410). An air storage tank (49) is fixedly connected to the upper end of the main body plate (1). A connection hole (417) communicating with the cavity (411) is opened at the lower end of the seventh fixing body (410). The connection hole (417) is connected to the air storage tank (49) through an air supply pipe.

8. A laser welding device for fire-fighting equipment with coatings according to claim 7, characterized in that: A flexible retaining ring (412) is fixedly connected to the inner side of the seventh fixing body (410). A seventh electric telescopic rod (413) is symmetrically connected to the inner side of the seventh fixing body (410). A first pressure sensor is fixedly connected to the telescopic ends of the two seventh electric telescopic rods (413). A fixed shell (414) is fixedly connected to the ends of the two first pressure sensors. One side of the two fixed shells (414) is an open structure. A seventh motor (416) is provided at the ends of the two fixed shells (414). A grinding roller (415) is fixedly connected to the transmission shaft ends of the two seventh motors (416).

9. A laser welding device for fire-fighting equipment with coatings according to claim 1, characterized in that: The welding mechanism (3) includes a fourth slot (31) opened on the side of the first connecting plate (11). The first connecting plate (11) is fixedly connected to a fifth motor (34) in the fourth slot (31). The transmission shaft end of the fifth motor (34) is fixedly connected to a threaded rod (35). A fifth fixing body (36) is provided on the side of the threaded rod (35). The side of the fifth fixing body (36) is slidably connected to the fourth slot (31). A support frame (12) is fixedly connected to the lower end of the main plate (1).

10. A laser welding device for fire-fighting equipment with coatings according to claim 9, characterized in that: The fifth fixing body (36) has a third placement groove (37) at its end. The fifth fixing body (36) has a third electric telescopic rod (38) fixedly connected in the third placement groove (37). The telescopic end of the third electric telescopic rod (38) is fixedly connected to a support body (32). The lower end of the support body (32) is rotatably connected to a laser welding head (33) via a stepper motor.

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