Martensite heat-resistant steel welding device for reheating boiler

Abstract

The invention discloses a martensite heat-resistant steel welding device for a reheating boiler, and relates to the technical field of welding. According to the martensitic heat-resistant steel welding device for the reheating boiler, through cooperation of a positioning ring frame, an inner side transmission ring and other assemblies, the positioning ring frame, the inner side transmission ring and a transmission ring frame are assembled to the outer side of a workpiece body, and after angle adjustment of a welding supporting frame is completed, operation is conducted through a driving assembly; the driving ring frame can be driven to rotate along with the driving ring frame on the outer side of the inner side driving ring, the welding supporting frame and the welding module can be driven to rotate along with the driving ring frame at the same time, so that the welding module can achieve welding treatment around the circumference of the workpiece body, and compared with a traditional welding mode, circumferential welding can be more conveniently conducted on the tubular workpiece; and the welding convenience is improved, and the application range of equipment is widened.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to a reheating boiler martensitic heat-resistant steel welding device. BACKGROUND

[0002] Martensitic heat-resistant steel is a kind of stainless steel whose mechanical properties are regulated by heat treatment, which belongs to the category of martensitic stainless steel, and is mainly applied to the main steam pipeline and some pressure pipelines in power plants. Referring to Chinese patent "CN120170220A", "a reheating boiler martensitic heat-resistant steel welding device and method", the patent points out that the current welding method which relies on manual holding of a welding gun for precise positioning can induce the decline of weld forming quality. However, the device still has the problems of poor operation convenience and small application range. To solve the above problems, the present application provides a reheating boiler martensitic heat-resistant steel welding device. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application provides a reheating boiler martensitic heat-resistant steel welding device to solve the problems raised in the background art.

[0004] To achieve the above purpose, the present application is implemented by the following technical scheme: a reheating boiler martensitic heat-resistant steel welding device, comprising a positioning ring frame, the positioning ring frame is fixedly installed on the outside of the workpiece body, a locking assembly is arranged between the positioning ring frame and the workpiece body for locking the positioning ring frame and the workpiece body; An inner side transmission ring is fixedly installed on the outside of the positioning ring frame, and a transmission ring frame is rotatably connected to the outside of the inner side transmission ring. A driving assembly is arranged between the transmission ring frame and the positioning ring frame for driving the transmission ring frame to rotate on the outside of the inner side transmission ring. A welding support frame is rotatably connected to the outside of the transmission ring frame. A driving cylinder body is connected between the end of the welding support frame and the transmission ring frame. The driving cylinder body is used to drive the welding support frame to rotate, thereby achieving angle adjustment of the welding support frame. A welding module is arranged in the welding support frame. The welding module is used for welding the workpiece body to be welded. A plurality of wire ring frames are fixedly installed on the outside of the inner side transmission ring. The wire ring frames are located on the inner side of the transmission ring frame and are slidably connected thereto. A plurality of wire connection ends matched with the wire ring frames are connected to the outside of the positioning ring frame.

[0005] Preferably, the driving assembly comprises a plurality of driving shafts rotatably connected to the outside of the positioning ring frame. A transmission chain is rotatably connected between the plurality of driving shafts. A transmission gear is fixedly sleeved on the end of each driving shaft. An arc-shaped driving tooth disc is fixedly installed in the inside of the transmission ring frame. Each transmission gear is meshed with the arc-shaped driving tooth disc.

[0006] Preferably, the inside of the positioning ring frame is fixedly provided with a driving motor, and a shaft coupling is connected between the output end of the driving motor and the end of the corresponding driving shaft rod.

[0007] Preferably, the welding module comprises a welding tong body, the welding tong body is slidingly installed in the inside of the welding support frame, the inside of the welding tong body is fixedly provided with an electrode body, and the welding tong body and the corresponding wire ring frame are electrically connected through wires.

[0008] Preferably, the outside of the welding tong body is fixedly provided with a servo motor, the end of the servo motor is fixedly sleeved with a driving gear, the outside of the welding support frame is fixedly provided with a transmission gear plate, the driving gear and the transmission gear plate are in meshing relationship, and the driving gear is used to drive the welding tong body and the electrode body to slide in the inside of the welding support frame.

[0009] Preferably, the locking assembly comprises a locking screw rod, a plurality of limiting screw sleeves are fixedly installed in the inside of the positioning ring frame, the inside of the limiting screw sleeve is rotatably connected with the locking screw rod, and the end of the locking screw rod is rotatably provided with an arc-shaped positioning plate.

[0010] Preferably, the limiting screw sleeve and the corresponding locking screw rod are connected through threads.

[0011] Preferably, the end of the driving cylinder body is rotatably provided with a limiting end, the limiting end is rotatably connected to the outside of the transmission ring frame, and the piston end of the driving cylinder body is rotatably connected to the welding support frame.

[0012] Preferably, the end of the welding support frame is fixedly provided with a positioning plate, and the inside of the positioning plate is fixedly provided with a heating module.

[0013] Preferably, the bottom of the positioning ring frame is fixedly provided with a collecting box, and a plurality of connecting rods are fixedly installed between the collecting box and the positioning ring frame.

[0014] The application provides a reheating boiler martensitic heat-resistant steel welding device. (1) The reheating boiler martensitic heat-resistant steel welding device is provided with a positioning ring frame and an inside transmission ring, the positioning ring frame, the inside transmission ring and the transmission ring frame are assembled to the outside of the workpiece body, and after the angle adjustment of the welding support frame is completed, the driving assembly is operated to drive the transmission ring frame outside the inside transmission ring, the transmission ring frame is rotated to drive the welding support frame and the welding module to rotate simultaneously, the welding module can realize welding treatment around the circumference of the workpiece body, compared with the traditional welding method, the circumferential welding of the tubular workpiece is more convenient, and the welding convenience and the application range of the equipment are improved.

[0015] (2) The reheating boiler martensitic heat-resistant steel welding device, through the setting of the heating module, can rotate along the workpiece body outer surface during the welding process, preheat the workpiece body, further ensure the stability of the welding position temperature of the workpiece body, reduce the crack phenomenon, and through the cooperation of the collecting box, the welding slag can fall into the collecting box during the welding process to complete automatic collection, and the subsequent maintenance convenience is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the application; Figure 2 It is a schematic diagram of the positioning ring frame and the transmission ring frame structure of the application; Figure 3 It is a schematic diagram of the side view structure of the application Figure 2 Figure 4 It is a schematic diagram of the enlarged structure at A in the application Figure 3 Figure 5 It is a schematic diagram of the explosion structure of the application Figure 2 Figure 6 It is a schematic diagram of the enlarged structure at B in the application Figure 5 Figure 7 It is a schematic diagram of the cross-sectional structure of the transmission ring frame of the application Figure 8 It is a schematic diagram of the cross-sectional structure of the welding support frame of the application

[0017] In the figure: 1, positioning ring frame; 2, workpiece body; 3, locking screw; 301, limiting nut; 302, arc positioning plate; 4, transmission ring frame; 5, welding support frame; 501, servo motor; 502, drive gear; 503, transmission tooth plate; 6, collecting box; 601, connecting rod; 7, welding tong body; 701, welding rod body; 8, positioning plate; 801, heating module; 9, inner transmission ring; 10, arc drive gear disc; 11, drive cylinder; 111, limiting end; 12, wire ring frame; 13, drive shaft; 131, transmission gear; 132, transmission chain; 14, drive motor. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0019] Please refer to​​​​Figures 1-8 The application provides two technical solutions, and specifically comprises the following embodiments. Embodiment one: A reheating boiler martensitic heat-resistant steel welding device, comprising a positioning ring frame 1, the positioning ring frame 1 is fixedly installed outside a workpiece body 2, a locking assembly is arranged between the positioning ring frame 1 and the workpiece body 2, and the locking assembly is used for locking the positioning ring frame 1 and the workpiece body 2; An inner transmission ring 9 is fixedly installed outside the positioning ring frame 1, and a transmission ring frame 4 is rotatably connected to the outer side of the inner transmission ring 9; a driving assembly is arranged between the transmission ring frame 4 and the positioning ring frame 1, and the driving assembly is used for driving the transmission ring frame 4 to rotate outside the inner transmission ring 9; The positioning ring frame 1, the inner transmission ring 9 and the transmission ring frame 4 are all open types, and the positioning ring frame 1 is used for being assembled to the outside of the workpiece body 2 to be welded, so that welding work is realized. Figures 1-8 When being assembled, the positioning ring frame 1 can be adapted to the workpiece body 2 of different sizes for locking through the cooperation of the locking assembly, and then the application range of the equipment and the welding convenience are effectively improved; A welding support frame 5 is rotatably connected to the outer side of the transmission ring frame 4, a driving cylinder body 11 is connected between the end of the welding support frame 5 and the transmission ring frame 4, the driving cylinder body 11 is used for driving the welding support frame 5 to rotate, angle adjustment of the welding support frame 5 is realized, and a welding module is arranged in the welding support frame 5 and used for welding work on the workpiece body 2 to be welded; After the positioning ring frame 1, the inner transmission ring 9 and the transmission ring frame 4 are assembled to the outside of the workpiece body 2, firstly, the driving cylinder body 11 is operated to drive the welding support frame 5 to rotate, angle adjustment of the welding module is realized, then the driving assembly is operated to drive the transmission ring frame 4 to rotate outside the inner transmission ring 9, the welding support frame 5 and the welding module are driven to rotate with the transmission ring frame 4, and the welding module can realize welding work around the circumference of the workpiece body 2; A plurality of wire ring frames 12 are fixedly installed outside the inner transmission ring 9, the wire ring frames 12 are located inside the transmission ring frame 4 and are slidably connected to the transmission ring frame 4, and a plurality of wire connection heads matched with the wire ring frames 12 are connected to the outside of the positioning ring frame 1; The wire ring frames 12 are used for realizing electric conduction work, a plurality of electric conduction grooves are arranged in the transmission ring frame 4, so that the wire ring frames 12 are always located inside the corresponding electric conduction grooves during the rotation of the transmission ring frame 4 outside the inner transmission ring 9, the circuit is always connected, and the rotation of the transmission ring frame 4 is not limited by the wires; The wire connection heads installed outside the positioning ring frame 1 are not shown in the figure, are used for being connected with the wire ring frames 12 through wires to realize power supply work, and details are not described herein; The driving assembly comprises driving shaft rods 13 rotatably connected to the outer side of the positioning ring frame 1, a transmission chain 132 rotatably connected between the driving shaft rods 13, and transmission gears 131 fixedly sleeved on the ends of the driving shaft rods 13. A plurality of sprockets are installed on the outer side of the driving shaft rods 13, and the transmission chain 132 is connected to the outer side of the sprockets for transmission operation. The sprockets and the transmission chain 132 are existing devices, and the sprockets are not shown in the figure and will not be described here. The driving motor 14 is fixedly installed in the positioning ring frame 1, and a shaft coupling is connected between the output end of the driving motor 14 and the end of the corresponding driving shaft rod 13. When the driving assembly is running, the corresponding driving shaft rod 13 can be driven to rotate by the operation of the driving motor 14, and the plurality of driving shaft rods 13 and the plurality of transmission gears 131 can be driven to rotate simultaneously by the cooperation of the plurality of sprockets and the transmission chain 132. With the mutual meshing of the transmission gears 131 and the arc-shaped driving tooth disc 10, the arc-shaped driving tooth disc 10 and the transmission ring frame 4 can be driven to rotate simultaneously, and the driving operation of the transmission ring frame 4 can be realized. The welding module comprises a welding tong body 7 slidably installed in the welding support frame 5, a welding electrode body 701 fixedly installed in the welding tong body 7, and the welding tong body 7 and the corresponding wire ring frame 12 electrically connected through wires. The welding tong body 7 is an existing device for clamping and locking the welding electrode body 701 and realizing power supply operation, which will not be described here. A servo motor 501 is fixedly installed on the outer side of the welding tong body 7, a driving gear 502 is fixedly sleeved on the end of the servo motor 501, a transmission tooth plate 503 is fixedly installed on the outer side of the welding support frame 5, and the driving gear 502 and the transmission tooth plate 503 are meshed with each other for driving the welding tong body 7 and the welding electrode body 701 to slide in the welding support frame 5. The servo motor 501 is an existing positive and negative motor for driving the welding tong body 7 to move translationally in the welding support frame 5, which will not be described here. The locking assembly comprises a locking screw rod 3, a plurality of limiting screw sleeves 301 fixedly installed in the positioning ring frame 1, the locking screw rod 3 rotatably connected in the limiting screw sleeve 301, and an arc-shaped positioning plate 302 rotatably installed on the end of the locking screw rod 3. The limiting screw sleeve 301 and the corresponding locking screw rod 3 are connected through threads. By cooperating with the locking screw 3, when the positioning ring frame 1 is assembled, the positioning ring frame 1 is sleeved on the corresponding workpiece body 2 to be welded, and then the plurality of locking screws 3 are rotated, so that the arc-shaped positioning plate 302 is in contact with the outer surface of the workpiece body 2, and the locking operation of the positioning ring frame 1 is realized; During the rotation of the locking screw 3, the positioning ring frame 1 needs to be coaxial with the workpiece body 2 to ensure the subsequent welding effect; The end of the driving cylinder body 11 is rotatably connected with the limiting end 111, the limiting end 111 is rotatably connected to the outside of the transmission ring frame 4, and the piston end of the driving cylinder body 11 is rotatably connected to the welding support frame 5.

[0020] In example one, a reheating boiler martensitic heat-resistant steel welding device is provided, which comprises a positioning ring frame 1, the positioning ring frame 1 is fixedly installed on the outside of the workpiece body 2, and a locking assembly is arranged between the positioning ring frame 1 and the workpiece body 2 for locking the positioning ring frame 1 and the workpiece body 2; The outside of the positioning ring frame 1 is fixedly connected with an inner transmission ring 9, the outside of the inner transmission ring 9 is rotatably connected with a transmission ring frame 4, and a driving assembly is arranged between the transmission ring frame 4 and the positioning ring frame 1 for driving the transmission ring frame 4 to rotate outside the inner transmission ring 9; The positioning ring frame 1, the inner transmission ring 9 and the transmission ring frame 4 are all open type, as shown in Figures 1-8 , which is used to be assembled to the outside of the workpiece body 2 to be welded to realize the welding operation. When assembled, the locking assembly can make the positioning ring frame 1 suitable for locking different sizes of workpiece bodies 2, thereby effectively improving the application range and welding convenience of the equipment; The outside of the transmission ring frame 4 is rotatably connected with a welding support frame 5, the end of the welding support frame 5 is connected with a driving cylinder body 11, and the driving cylinder body 11 is used to drive the welding support frame 5 to rotate, thereby realizing the angle adjustment of the welding support frame 5. The inside of the welding support frame 5 is provided with a welding module, and the welding module is used to weld the workpiece body 2 to be welded; After the positioning ring frame 1, the inner transmission ring 9 and the transmission ring frame 4 are assembled to the outside of the workpiece body 2, first, the driving cylinder body 11 is operated to drive the welding support frame 5 to rotate, thereby realizing the angle adjustment of the welding module. After the adjustment is completed, the driving assembly is operated to drive the transmission ring frame 4 outside the inner transmission ring 9. With the rotation of the transmission ring frame 4, the welding support frame 5 and the welding module can be driven to rotate with the transmission ring frame 4, so that the welding module can realize the welding treatment around the circumference of the workpiece body 2; A plurality of wire ring frames 12 are fixedly installed on the outside of the inner transmission ring 9, the wire ring frames 12 are located on the inside of the transmission ring frame 4 and are slidably connected with the transmission ring frame 4, and a plurality of wire connection end heads matched with the wire ring frames 12 are connected to the outside of the positioning ring frame 1. The wire ring frame 12 is used to realize the conduction operation, and a plurality of conduction slots are formed in the inner side of the transmission ring frame 4, so that the wire ring frame 12 is always located in the corresponding conduction slot during the rotation of the transmission ring frame 4 outside the inner transmission ring 9, and the circuit is always connected, avoiding the rotation of the transmission ring frame 4 being limited by the wire; The wiring end installed outside the positioning ring frame 1 is not shown in the figure, which is used to connect with the wire ring frame 12 through the wire to realize the power supply operation, which will not be repeated here; The drive assembly includes a plurality of drive shafts 13 rotatably connected to the outer side of the positioning ring frame 1, a transmission chain 132 rotatably connected between the plurality of drive shafts 13, and a transmission gear 131 fixedly sleeved on the end of each drive shaft 13. An arc-shaped drive gear disc 10 is fixedly installed in the inner side of the transmission ring frame 4, and the plurality of transmission gears 131 are in meshing relationship with the arc-shaped drive gear disc 10. A plurality of sprockets are installed on the outer side of the plurality of drive shafts 13, and the transmission chain 132 is connected outside the plurality of sprockets for realizing the transmission operation; The sprocket and the transmission chain 132 are existing devices, and the sprocket is not shown in the figure, which will not be repeated here; A drive motor 14 is fixedly installed in the inner side of the positioning ring frame 1, and a shaft coupling is connected between the output end of the drive motor 14 and the end of the corresponding drive shaft 13. When the drive assembly operates, the corresponding drive shaft 13 can be driven to rotate by the operation of the drive motor 14, and the plurality of drive shafts 13 and the plurality of transmission gears 131 can be driven to rotate simultaneously by the cooperation of the plurality of sprockets and the transmission chain 132. With the meshing relationship between the transmission gears 131 and the arc-shaped drive gear disc 10, the arc-shaped drive gear disc 10 and the transmission ring frame 4 can be driven to rotate simultaneously, realizing the driving operation of the transmission ring frame 4; The welding module includes a welding tong body 7 which is slidably installed in the inner side of the welding support frame 5, and a welding electrode body 701 is fixedly installed in the inner side of the welding tong body 7. The welding tong body 7 and the corresponding wire ring frame 12 are electrically connected through the wire; The welding tong body 7 is an existing device for clamping and locking the welding electrode body 701 and realizing the power supply operation, which will not be repeated here; A servo motor 501 is fixedly installed on the outer side of the welding tong body 7, a drive gear 502 is fixedly sleeved on the end of the servo motor 501, a transmission gear plate 503 is fixedly installed on the outer side of the welding support frame 5, and the drive gear 502 and the transmission gear plate 503 are in meshing relationship, which is used to drive the welding tong body 7 and the welding electrode body 701 to slide in the inner side of the welding support frame 5; The servo motor 501 is a positive and negative motor, which is used to drive the welding tong body 7 to make translational motion in the inner side of the welding support frame 5, which will not be repeated here; The locking assembly comprises locking screws 3, a plurality of limiting screw sleeves 301 are fixedly arranged in the inner portion of the positioning ring frame 1, the limiting screw sleeves 301 are rotationally connected with the locking screws 3, and the end portions of the locking screws 3 are rotationally arranged with arc-shaped positioning plates 302; The limiting screw sleeves 301 are connected with the corresponding locking screws 3 through threads; Through the cooperation of the locking screws 3, when the positioning ring frame 1 is assembled, the positioning ring frame 1 is sleeved on the corresponding workpiece body 2 to be welded, and then the plurality of locking screws 3 are rotated, so that the arc-shaped positioning plates 302 are in contact with the outer surface of the workpiece body 2, and the locking operation of the positioning ring frame 1 is realized; During the rotation of the locking screws 3, the positioning ring frame 1 needs to be kept coaxial with the workpiece body 2, so as to ensure the subsequent welding effect; The end portion of the driving cylinder body 11 is rotationally arranged with a limiting end head 111, the limiting end head 111 is rotationally connected to the outer side of the transmission ring frame 4, and the piston end of the driving cylinder body 11 is rotationally connected to the welding support frame 5; The end portion of the welding support frame 5 is fixedly arranged with a positioning plate 8, and the inner portion of the positioning plate 8 is fixedly arranged with a heating module 801; the heating module 801 is an existing device, which is used for preheating the welding position of the workpiece body 2 during the welding process, and will not be described here; The heating module 801 can rotate along the outer surface of the workpiece body 2 during the welding process, further ensuring the stability of the temperature of the welding position of the workpiece body 2, and reducing the cracking phenomenon; The bottom portion of the positioning ring frame 1 is fixedly arranged with a collecting box 6, and a plurality of connecting rods 601 are fixedly arranged between the collecting box 6 and the positioning ring frame 1; through the arrangement of the collecting box 6, the welding slag can be automatically collected in the collecting box 6 during the welding process, and the subsequent maintenance convenience is improved.

[0021] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by those skilled in the art.

[0022] The above has described one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the implementation range of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the scope of the present application.

Claims

1. A welding device for martensitic heat-resistant steel in a reheat boiler, comprising a positioning ring frame (1), the positioning ring frame (1) being fixedly installed on the outside of the workpiece body (2), characterized in that: A locking assembly is provided between the positioning ring frame (1) and the workpiece body (2) to lock the positioning ring frame (1) and the workpiece body (2); An inner transmission ring (9) is fixedly installed on the outer side of the positioning ring frame (1). A transmission ring frame (4) is rotatably connected to the outer side of the inner transmission ring (9). A driving component is provided between the transmission ring frame (4) and the positioning ring frame (1) to drive the transmission ring frame (4) to rotate on the outer side of the inner transmission ring (9). The outer side of the transmission ring frame (4) is rotatably connected to a welding support frame (5). The end of the welding support frame (5) is connected to the transmission ring frame (4) by a drive cylinder (11). The drive cylinder (11) is used to drive the welding support frame (5) to rotate, thereby adjusting the angle of the welding support frame (5). The welding support frame (5) is equipped with a welding module inside. The welding module is used to perform welding processing on the workpiece body (2) to be welded. Multiple wire ring frames (12) are fixedly installed on the outer side of the inner transmission ring (9). The wire ring frames (12) are located inside the transmission ring frame (4) and are slidably connected to it. Multiple wiring terminals that are compatible with the wire ring frames (12) are connected to the outer side of the positioning ring frame (1).

2. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 1, characterized in that: The drive assembly includes drive shafts (13), there are multiple drive shafts (13) and they are rotatably connected to the outside of the positioning ring frame (1). A transmission chain (132) is rotatably connected between the multiple drive shafts (13). A transmission gear (131) is fixedly sleeved at the end of each of the multiple drive shafts (13). An arc-shaped drive gear disk (10) is fixedly installed inside the transmission ring frame (4). The multiple transmission gears (131) mesh with the arc-shaped drive gear disk (10).

3. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 2, characterized in that: The positioning ring frame (1) is internally fixedly equipped with a drive motor (14), and a coupling is connected between the output end of the drive motor (14) and the end of the corresponding drive shaft (13).

4. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 1, characterized in that: The welding module includes a welding clamp body (7), which is slidably installed inside the welding support frame (5). A welding rod body (701) is fixedly installed inside the welding clamp body (7). The welding clamp body (7) and the corresponding wire ring frame (12) are electrically connected by a wire.

5. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 4, characterized in that: A servo motor (501) is fixedly installed on the outside of the welding clamp body (7). A drive gear (502) is fixedly sleeved at the end of the servo motor (501). A transmission gear plate (503) is fixedly installed on the outside of the welding support frame (5). The drive gear (502) and the transmission gear plate (503) mesh with each other to drive the welding clamp body (7) and the welding rod body (701) to slide inside the welding support frame (5).

6. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 1, characterized in that: The locking assembly includes a locking screw (3), and multiple limiting screw sleeves (301) are fixedly installed inside the positioning ring frame (1). The locking screw (3) is rotatably connected inside the limiting screw sleeves (301), and an arc-shaped positioning plate (302) is rotatably installed at the end of the locking screw (3).

7. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 6, characterized in that: The limiting screw sleeve (301) is connected to the corresponding locking screw (3) by a thread.

8. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 1, characterized in that: The end of the drive cylinder (11) is rotatably mounted with a limiting end (111), which is rotatably connected to the outside of the transmission ring frame (4), and the piston end of the drive cylinder (11) is rotatably connected to the welding support frame (5).

9. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 1, characterized in that: A positioning plate (8) is fixedly installed at the end of the welding support frame (5), and a heating module (801) is fixedly installed inside the positioning plate (8).

10. The welding device for martensitic heat-resistant steel in a reheat boiler according to claim 1, characterized in that: A collection box (6) is fixedly installed at the bottom of the positioning ring frame (1), and multiple connecting rods (601) are fixedly installed between the collection box (6) and the positioning ring frame (1).

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