CN219310444U

CN219310444U - Pipe wall welding device for curved surface pipe plate

Info

Publication number: CN219310444U
Application number: CN202320239460.4U
Authority: CN
Inventors: 王世林; 商超群
Original assignee: Changzhou Weida Mingbo Automation Co ltd
Current assignee: Changzhou Weida Mingbo Automation Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-07-07
Anticipated expiration: 2033-02-16

Abstract

The utility model relates to a curved surface welding field especially relates to a pipe wall welding set of curved surface tube sheet, and it includes fixed subassembly and welding subassembly, welding subassembly includes welder, mount pad and two connecting plates of relative setting, welder connects on the mount pad, mount pad sliding connection is between two connecting plates, fixed subassembly includes two fixed plates that are used for with curved surface tube sheet end connection, the connecting plate is located between two fixed plates, coaxial rotation is connected with installation piece and ring gear on the fixed plate, installation piece and curved surface tube sheet coaxial setting and lie in the curved surface tube sheet, ring gear and curved surface tube sheet coaxial setting and cover are established outside going the curved surface tube sheet, connecting plate and installation piece, ring gear detachable connection, this application have the effect that improves curved surface tube sheet's welding effect.

Description

Pipe wall welding device for curved surface pipe plate

Technical Field

The application relates to the field of curved surface welding, in particular to a pipe wall welding device of a curved surface pipe plate.

Background

The tube sheet, i.e. the round steel plate, is drilled with holes slightly larger than the outer diameter of the tubes, and is the round steel in the heat exchanger that serves to fix the tubes and to seal the medium. In the production of boiler and heat exchanger industry, the side curved tube plate of the cylindrical furnace body is welded with the tube, the joints are more, and the welding workload is large. When the side wall of the curved tube plate is welded, the curved tube plate is welded by adopting a manual welding method, so that the distance between a welding gun and the side wall of the curved tube plate is difficult to control, and the welding effect is poor.

Disclosure of Invention

In order to improve the welding effect of the curved tube plate, the application provides a tube wall welding device of the curved tube plate.

The application provides a pipe wall welding set of curved surface tube sheet adopts following technical scheme:

the utility model provides a pipe wall welding set of curved surface tube sheet, includes fixed subassembly and welding subassembly, welding subassembly includes welder, mount pad and two connecting plates of relative setting, welder connects on the mount pad, mount pad sliding connection is between two connecting plates, fixed subassembly includes two fixed plates that are used for with curved surface tube sheet end connection, the connecting plate is located between two fixed plates, coaxial rotation is connected with installation piece and ring gear on the fixed plate, installation piece and curved surface tube sheet coaxial setting and lie in the curved surface tube sheet, the ring gear is coaxial with curved surface tube sheet setting and cover is established outside going the curved surface tube sheet, the connecting plate can dismantle with installation piece, ring gear and be connected.

By adopting the technical scheme, one end of the curved tube plate is connected with one fixed plate, the fixed plate is coaxially arranged with the curved tube plate, then the connecting plate is connected with the mounting block or the toothed ring, and the other fixed plate is connected with the other end of the curved tube plate; if the connecting plate is connected with the mounting block, the welding gun is positioned in the curved tube plate, the mounting seat is moved, the mounting block is rotated, and the welding gun performs welding treatment on the inner side wall of the curved tube plate; if the connecting plate is inserted into the connecting groove on the toothed ring, the welding gun is positioned outside the curved tube plate, the welding gun is opposite to the outer side wall of the curved tube plate, the mounting seat is moved, the mounting block is rotated, and the welding gun welds the inner side wall of the curved tube plate.

Optionally, the fixed subassembly still includes the roof, be provided with the mounting groove on the fixed plate, mounting groove and the coaxial setting of fixed plate, the mounting groove sets up to annular, the radial sliding connection of mounting groove is followed to the bottom of mounting groove has the roof, the roof is provided with a plurality of, a plurality of the roof is the central circumference setting in the mounting groove along the axle center of mounting groove, the radial sliding connection of roof along the mounting groove is in the bottom of mounting groove, a plurality of the roof is synchronous towards the removal of mounting groove axle center.

Through adopting above-mentioned technical scheme, remove the roof, the roof removes towards the mounting groove axle center simultaneously, presss from both sides the tip of curved surface tube sheet in the mounting groove to make curved surface tube sheet and fixed plate coaxial setting.

Optionally, the fixed subassembly still includes the swivel becket, the swivel becket is located one side that the fixed plate axle center was kept away from to the mounting groove, swivel becket and fixed plate rotate with its axle center as the center and be connected, be provided with the slip mouth on the lateral wall that the mounting groove was kept away from to the fixed plate, slip mouth and installation cavity intercommunication, the slip mouth sets up to the arc, be connected with the rotating handle on the swivel becket, the rotating handle runs through the slip mouth and along the circumference sliding fit of installation cavity with the slip mouth, the terminal surface of swivel becket is connected with the ratchet, the fixed plate can be dismantled and be connected with the limiting plate that is used for with the ratchet meshing, the roof is kept away from and articulates between lateral wall and the swivel becket of mounting groove axle center.

Through adopting above-mentioned technical scheme, through the swivel handle rotation swivel becket, limiting plate and ratchet interlock for the swivel becket can only unidirectional rotation, and the swivel becket rotates and drives the connecting rod and rotate, and the connecting rod promotes the roof and removes towards the mounting groove axle center, thereby realizes the synchronous movement of roof.

Optionally, be provided with the installation cavity that is used for installing the swivel becket on the fixed plate, be provided with the connector on the lateral wall that the fixed plate kept away from the mounting groove, connector and installation cavity intercommunication, the one end that the installation cavity was kept away from to the connector sets up to the screw hole, the connector is less and set up to the polygon in the cross-section that is close to the one end of installation cavity, there is the bolt through connector threaded connection on the fixed plate, the tip of bolt extends to the one end that the connector is close to the installation cavity and rotates and be connected with the connecting block, the connecting block is located the one end that the connector is close to the installation cavity, the one end that the bolt was kept away from to the connecting block articulates there is the limiting plate.

Through adopting above-mentioned technical scheme, when needing to remove the connection between fixed plate and the curved surface tube sheet, rotate the bolt, the bolt drives the connecting block and keeps away from the go-between and remove, and the limiting plate breaks away from with the go-between to make the go-between can reverse rotation, the roof can keep away from the installation groove axle center and remove, contacts the centre of a roll to the centre of a curve surface tube sheet.

Optionally, be connected with drive assembly on the fixed plate, drive assembly includes pivot, drive gear and linkage gear, pivot coaxial rotation connects on the fixed plate, the pivot runs through the fixed plate, installation piece coaxial coupling is close to the one end of mounting groove in the pivot, linkage gear coaxial coupling keeps away from the one end of mounting groove in the pivot, the toothed ring coaxial rotation connects on the terminal surface that the mounting groove was kept away from to the fixed plate, the tooth setting of toothed ring is on the inside wall of toothed ring, the outside wall of toothed ring exceeds the outside wall of fixed plate, drive gear sets up between toothed ring and linkage gear, drive gear rotates with the fixed plate to be connected, drive gear meshes with linkage gear, toothed ring, be connected with the first motor that is used for rotating drive gear on the fixed plate.

Through adopting above-mentioned technical scheme, through the transmission of drive gear, realize the rotation of a driving source drive installation piece and ring gear.

Optionally, the side wall of the mounting block far away from the fixed plate and the side wall of the part of the toothed ring beyond the fixed plate near the mounting block are respectively provided with a connecting groove for being spliced with the connecting plate.

Through adopting above-mentioned technical scheme, insert the connecting plate and establish on installation piece, ring gear, after fixed plate and curved surface tube sheet are connected, the connecting plate is pressed from both sides between the fixed plate to be convenient for realize the quick connect of connecting plate and fixed plate.

Optionally, the welding assembly still includes screw rod and guide arm, screw rod and guide arm mutual parallel arrangement, screw rod and guide arm are all rotated and are connected between two connecting plates, one be provided with in the connecting plate and hold the chamber, be connected with the second motor that is used for driving screw rod pivoted through holding the chamber on the connecting plate, mount pad threaded connection is on the screw rod, and the guide arm runs through the mount pad, and welder passes through the cylinder and connects on the mount pad.

Through adopting above-mentioned technical scheme, rotate the screw rod, be convenient for realize the axial displacement of mount pad along curved surface tube sheet.

Optionally, a distance sensor for measuring the distance between the welding gun and the side wall of the curved tube plate is connected to the piston rod of the air cylinder, and the distance sensor is electrically connected with the air cylinder.

Through adopting above-mentioned technical scheme, when welder welds the inside wall of curved surface tube sheet, if distance sensor detects that the distance between welder and the curved surface tube sheet changes, distance sensor control cylinder starts, makes the adjustment to the interval between welder and the curved surface tube sheet to make the interval between welder and the curved surface tube sheet lateral wall remain unanimous throughout, improve the welding effect.

In summary, the present application includes at least one of the following beneficial technical effects:

1. firstly, connecting one end of a curved tube plate with one fixed plate, wherein the fixed plate is coaxially arranged with the curved tube plate, then connecting a connecting plate with a mounting block or a toothed ring, then connecting the other fixed plate with the other end of the curved tube plate, and connecting the connecting plate with the fixed plate; if the connecting plate is connected with the mounting block, the welding gun is positioned in the curved tube plate, the mounting seat is moved, the mounting block is rotated, and the welding gun performs welding treatment on the inner side wall of the curved tube plate; if the connecting plate is inserted into the connecting groove on the toothed ring, the welding gun is positioned outside the curved tube plate, the welding gun is opposite to the outer side wall of the curved tube plate, the mounting seat is moved, the mounting block is rotated, and the welding gun welds the inner side wall of the curved tube plate;

2. the rotating ring is rotated by the rotating handle, the limiting plate is meshed with the ratchet, so that the rotating ring can only rotate in one direction, the rotating ring rotates to drive the connecting rod to rotate, and the connecting rod pushes the top plate to move towards the axis of the mounting groove, so that the synchronous movement of the top plate is realized;

3. when the connection between the fixed plate and the curved tube plate needs to be released, the bolts are rotated, the bolts drive the connecting blocks to move away from the connecting rings, and the limiting plates are separated from the rotating rings, so that the rotating rings can reversely rotate, the top plate can move away from the axis of the mounting groove, and the curved tube plate is clamped in a contact manner.

Drawings

FIG. 1 is a schematic view of the overall structure of a tube wall welding device for a curved tube sheet embodying the present utility model in the embodiments of the present application;

FIG. 2 is a schematic view of a structure for embodying a fixing plate in an embodiment of the present application;

FIG. 3 is a schematic view for embodying the positional relationship between the connection plate and the fixing plate in the embodiment of the present application;

fig. 4 is an enlarged view of a portion a for showing the positional relationship between the welding gun and the mount in fig. 3.

Reference numerals illustrate:

1. a fixing plate; 2. a top plate; 3. a rotating ring; 4. a mounting groove; 5. a chute; 6. a slide block; 7. a pressure spring; 8. a mounting cavity; 9. a sliding port; 10. a rotating handle; 11. a connecting groove; 12. a bolt; 13. a connecting block; 14. a limiting plate; 15. a connecting rod; 16. a rotating shaft; 17. a mounting block; 18. a toothed ring; 19. a drive gear; 20. a linkage gear; 21. a first motor; 22. a connecting plate; 23. a screw; 24. a guide rod; 25. a mounting base; 26. a cylinder; 27. a welding gun; 28. a second motor; 29. a distance sensor.

Detailed Description

The embodiment of the application discloses a pipe wall welding device of a curved surface pipe plate.

Referring to fig. 1 and 2, a tube wall welding device for a curved tube plate comprises a fixing assembly and a welding assembly, wherein the fixing assembly comprises two fixing plates 1, a top plate 2 and a rotating ring 3.

Referring to fig. 1 and 2, a mounting groove 4 is provided on a fixing plate 1, the mounting groove 4 and the fixing plate 1 are coaxially arranged, the mounting groove 4 is annular, the bottom of the mounting groove 4 is connected with a top plate 2 in a sliding manner along the radial direction of the mounting groove 4, the top plate 2 is provided with a plurality of top plates 2 in the mounting groove 4 along the axis of the mounting groove 4 as the center circumference, the top plate 2 is connected with the bottom of the mounting groove 4 in a sliding manner along the radial direction of the mounting groove 4, the side wall of the top plate 2 facing the axis of the mounting groove 4 is arc-shaped, the bottom of the mounting groove 4 is provided with a sliding groove 5 along the radial direction of the mounting groove 4, the section of the sliding groove 5 is dovetail-shaped, a sliding block 6 matched with the sliding groove 5 is connected on the top plate 2, the sliding block 6 is positioned in the sliding groove 5 and is in sliding fit with the sliding groove 5 along the radial direction of the mounting groove 4, an elastic piece is connected between the sliding block 6 and the side wall of the sliding groove 5 far away from the axis of the mounting groove 4, in this embodiment, the elastic piece is a pressure spring 7, the side wall of the top plate 2 facing the axis of the mounting groove 4 and the side wall of the axis of the mounting groove 4 is provided with a skid-proof pad, and the skid-proof pad is made of a rubber material.

Referring to fig. 1 and 2, a mounting cavity 8 is arranged in the fixed plate 1, the mounting cavity 8 is annular, the mounting cavity 8 is positioned at one side of the mounting groove 4 away from the axis of the fixed plate 1, and the rotating ring 3 is positioned in the mounting cavity 8 and is in rotating connection with the fixed plate 1 by taking the axis as the center; the fixed plate 1 is provided with sliding opening 9 on keeping away from the lateral wall of mounting groove 4, and sliding opening 9 and installation cavity 8 intercommunication, sliding opening 9 set up to the arc, are connected with stem 10 on the swivel becket 3, and stem 10 runs through sliding opening 9 and along the circumference sliding fit of installation cavity 8 with sliding opening 9.

Referring to fig. 1 and 2, the end face of the rotating ring 3 is connected with a ratchet, a connecting port is arranged on the side wall of the fixed plate 1 far away from the mounting groove 4, the connecting port is communicated with the mounting cavity 8, one end of the connecting port far away from the mounting cavity 8 is provided with a threaded hole, the cross section of one end of the connecting port close to the mounting cavity 8 is smaller and is provided with a polygon, the cross section of the connecting port is square in the embodiment, the fixed plate 1 is connected with a bolt 12 through the threads of the connecting port, the end of the bolt 12 extends to one end of the connecting port close to the mounting cavity 8 and is rotationally connected with a connecting block 13, the connecting block 13 is positioned at one end of the connecting port close to the mounting cavity 8, one end of the connecting block 13 far away from the bolt 12 is hinged with a limiting plate 14, the limiting plate 14 is positioned in the connecting port, and the limiting plate 14 is meshed with the ratchet on the rotating ring 3. A connecting rod 15 is hinged on the side wall of the top plate 2 far away from the axis of the mounting groove 4, a communication port for the connecting rod 15 to pass through is arranged between the mounting groove 4 and the mounting cavity 8, and the connecting rod 15 penetrates through the communication port and is hinged with the rotating ring 3.

Referring to fig. 1 and 2, a driving component is connected to a fixing plate 1, the driving component includes a rotating shaft 16, a mounting block 17, a driving gear 19, a linkage gear 20 and a toothed ring 18, the rotating shaft 16 is coaxially connected to the fixing plate 1 in a rotating way, the rotating shaft 16 penetrates through the fixing plate 1, the mounting block 17 is coaxially connected to one end of the rotating shaft 16 close to a mounting groove 4, the linkage gear 20 is coaxially connected to one end of the rotating shaft 16 far away from the mounting groove 4, the toothed ring 18 is coaxially connected to the end surface of the fixing plate 1 far away from the mounting groove 4 in a rotating way, teeth of the toothed ring 18 are arranged on the inner side wall of the toothed ring 18, the outer side wall of the toothed ring 18 exceeds the outer side wall of the fixing plate 1, the driving gear 19 is arranged between the toothed ring 18 and the linkage gear 20, the driving gear 19 is rotationally connected to the fixing plate 1, the driving gear 19 is meshed with the linkage gear 20 and the toothed ring 18, and a first motor 21 for rotating the driving gear 19 is connected to the fixing plate 1. If the number of the driving gears 19 is a single number, the adjacent driving gears 19 are engaged with each other, the ring gear 18 and the interlocking gear 20 are rotated in opposite directions, and if the number of the driving gears 19 is a double number, the adjacent driving gears 19 are engaged with each other, and the ring gear 18 and the interlocking gear 20 are rotated in the same direction. In this embodiment, two driving gears 19 are provided, and the two driving gears 19 are meshed with each other, one driving gear 19 is meshed with the toothed ring 18, and the other driving gear 19 is meshed with the linking gear 20.

Referring to fig. 3 and 4, the welding assembly includes a connection plate 22, a screw 23, a guide rod 24, a mounting seat 25 and a welding gun 27, the connection plate 22 is provided with two connection plates 22, the two connection plates 22 are arranged oppositely, the screw 23 and the guide rod 24 are arranged in parallel, the screw 23 and the guide rod 24 are both connected between the two connection plates 22 in a rotating way, a containing cavity is arranged in one connection plate 22, and a second motor 28 for driving the screw 23 to rotate is connected on the connection plate 22 through the containing cavity. The mount pad 25 threaded connection is on screw rod 23, and guide arm 24 runs through mount pad 25, and welder 27 passes through cylinder 26 to be connected on mount pad 25, and cylinder 26 is connected on mount pad 25, and the axial of cylinder 26 is perpendicular to the axial setting of screw rod 23, and welder 27 is connected on the piston rod of cylinder 26, and welder 27 is used for carrying out the welding to the lateral wall of curved surface tube sheet, is connected with the distance sensor 29 that is used for measuring the interval between welder 27 and the curved surface tube sheet lateral wall on the piston rod of cylinder 26, and distance sensor 29 is connected with the cylinder 26 electricity.

Referring to fig. 3 and 4, the side wall of the mounting block 17 away from the fixing plate 1, and the side wall of the toothed ring 18 near the mounting block 17 on the portion beyond the fixing plate 1 are each provided with a connection groove 11 for plugging with the connection plate 22.

The implementation principle of the pipe wall welding device of the curved surface pipe plate in the embodiment of the application is as follows:

firstly, one end of a curved tube plate is inserted into a mounting groove 4 on a fixed plate 1, a rotary handle 10 is rotated along a sliding opening 9, the rotary handle 10 drives a rotary ring 3 to rotate, a limit plate 14 is meshed with a ratchet on the rotary ring 3 to enable the rotary ring 3 to rotate unidirectionally, a connecting rod 15 is driven to rotate when the rotary ring 3 rotates, the connecting rod 15 pushes a top plate 2, the top plate 2 moves towards the axis of the mounting groove 4, a spring is stretched, and the top plate 2 clamps the curved tube plate between the top plate 2 and the side wall of the mounting groove 4.

Then, one connecting plate 22 is inserted into the connecting groove 11, the other fixing plate 1 is sleeved at the other end of the curved tube plate through the mounting groove 4, so that the other connecting plate 22 is spliced with the fixing plate 1, the two connecting plates 22 are fixed between the fixing plates 1, and at the moment, the axial direction of the screw 23 is parallel to the axial direction of the curved tube plate, the axial direction of the fixing plate 1 and the axial direction of the connecting plates 22. If the connecting plate 22 is inserted into the connecting groove 11 on the mounting block 17, the welding gun 27 is positioned in the curved tube plate; if the connecting plate 22 is inserted into the connecting groove 11 on the toothed ring 18, the welding gun 27 is positioned outside the curved tube plate, the welding gun 27 is opposite to the outer side wall of the curved tube plate, and the rotating handle 10 is rotated to fix the fixing plate 1 and the curved tube plate together.

The second motor 28 is started, the second motor 28 drives the screw 23 to rotate, the mounting seat 25 drives the welding gun 27 to move along the axial direction of the curved tube plate, the starting cylinder 26 adjusts the welding gun 27 and the curved tube plate, and the distance between the welding gun 27 and the curved tube plate is measured by the distance sensor 29. Starting a first motor 21, wherein the first motor 21 drives a driving gear 19 to rotate, and the driving gear 19 drives the driving gear 19 and a toothed ring 18 to rotate, so that the toothed ring 18 and a mounting block 17 are controlled to rotate through the same driving source, the toothed ring 18 rotates to drive a connecting plate 22, a mounting seat 25 and a welding gun 27 to rotate around the axis of a curved tube plate, and the welding gun 27 welds the outer side wall of the curved tube plate; the drive gear 19 drives the installation block 17 to rotate through the rotating shaft 16, drives the connecting plate 22, the installation seat 25 and the welding gun 27 to rotate by taking the axis of the curved tube plate as the center, welds the inner side wall of the curved tube plate by the welding gun 27, and when the welding gun 27 welds the inner side wall of the curved tube plate, if the distance sensor 29 detects that the distance between the welding gun 27 and the curved tube plate changes, the distance sensor 29 controls the starting of the air cylinder 26, and the distance between the welding gun 27 and the curved tube plate is adjusted, so that the distance between the welding gun 27 and the side wall of the curved tube plate is always consistent, and the welding effect is improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. A pipe wall welding device of a curved surface pipe plate is characterized in that: including fixed subassembly and welding set spare, welding set spare includes welder (27), mount pad (25) and two connecting plates (22) of relative setting, welder (27) are connected on mount pad (25), mount pad (25) sliding connection is between two connecting plates (22), fixed subassembly includes two fixed plates (1) that are used for with curved surface tube sheet end connection, connecting plate (22) are located between two fixed plates (1), coaxial rotation is connected with installation piece (17) and toothed ring (18) on fixed plate (1), installation piece (17) and curved surface tube sheet coaxial setting and be located curved surface tube sheet, toothed ring (18) are coaxial with curved surface tube sheet setting and cover are established outside the decurrent tube sheet, connecting plate (22) are connected with installation piece (17), toothed ring (18) can be dismantled.

2. The tube wall welding device for a curved tube plate according to claim 1, wherein: the fixing assembly further comprises a top plate (2), the fixing plate (1) is provided with a mounting groove (4), the mounting groove (4) and the fixing plate (1) are coaxially arranged, the mounting groove (4) is arranged to be annular, the bottom of the mounting groove (4) is connected with the top plate (2) in a sliding manner along the radial direction of the mounting groove (4), the top plate (2) is provided with a plurality of pieces, the top plate (2) is arranged in the mounting groove (4) along the axis of the mounting groove (4) as the center circumference, the top plate (2) is connected to the bottom of the mounting groove (4) in a sliding manner along the radial direction of the mounting groove (4), and the top plate (2) moves towards the axis of the mounting groove (4) synchronously.

3. The tube wall welding device for a curved tube plate according to claim 2, wherein: the fixed subassembly still includes swivel becket (3), swivel becket (3) are located one side that fixed plate (1) axle center was kept away from to mounting groove (4), swivel becket (3) and fixed plate (1) use its axle center to rotate and are connected, be provided with sliding port (9) on the lateral wall that mounting groove (4) was kept away from to fixed plate (1), sliding port (9) and installation cavity (8) intercommunication, sliding port (9) set up to the arc, be connected with on swivel becket (3) stem (10), stem (10) run through sliding port (9) and with sliding port (9) along the circumference sliding fit of installation cavity (8), the terminal surface of swivel becket (3) is connected with the ratchet, fixed plate (1) can dismantle be connected with be used for with ratchet engaged limiting plate (14), articulated between lateral wall that mounting groove (4) axle center was kept away from to roof (2) and swivel becket (3) have connecting rod (15).

4. A tube wall welding apparatus for a curved tube sheet as claimed in claim 3, wherein: be provided with on fixed plate (1) and be used for installing installation cavity (8) of swivel becket (3), be provided with the connector on the lateral wall that mounting groove (4) was kept away from to fixed plate (1), connector and installation cavity (8) intercommunication, the one end that installation cavity (8) was kept away from to the connector sets up to the screw hole, the connector is less and set up to the polygon near the cross-section of the one end of installation cavity (8), there is bolt (12) through connector threaded connection on fixed plate (1), the tip of bolt (12) extends to the one end that the connector is close to installation cavity (8) and rotates and be connected with connecting block (13), connecting block (13) are located the one end that is close to installation cavity (8) in the connector, the one end that bolt (12) was kept away from to connecting block (13) articulates there is limiting plate (14).

5. The tube wall welding device for a curved tube plate according to claim 1, wherein: the fixed plate (1) is connected with a driving assembly, the driving assembly comprises a rotating shaft (16), a driving gear (19) and a linkage gear (20), the rotating shaft (16) is coaxially and rotatably connected to the fixed plate (1), the rotating shaft (16) penetrates through the fixed plate (1), the mounting block (17) is coaxially connected to one end, close to the mounting groove (4), of the rotating shaft (16), the linkage gear (20) is coaxially connected to one end, far away from the mounting groove (4), of the rotating shaft (16), the toothed ring (18) is coaxially and rotatably connected to the end face, far away from the mounting groove (4), of the fixed plate (1), the gear of ring gear (18) sets up on the inside wall of ring gear (18), the outside wall of ring gear (18) exceeds the outside wall of fixed plate (1), drive gear (19) set up between ring gear (18) and linkage gear (20), drive gear (19) are connected with fixed plate (1) rotation, drive gear (19) and linkage gear (20), ring gear (18) meshing, be connected with on fixed plate (1) first motor (21) that are used for rotating drive gear (19).

6. The tube wall welding device for a curved tube plate according to claim 5, wherein: the mounting blocks (17) are arranged on the side wall far away from the fixed plate (1), and the connecting grooves (11) for being spliced with the connecting plates (22) are arranged on the side wall, close to the mounting blocks (17), of the part, exceeding the fixed plate (1), of the toothed ring (18).

7. The tube wall welding device for a curved tube plate according to claim 1, wherein: the welding assembly further comprises a screw rod (23) and a guide rod (24), the screw rod (23) and the guide rod (24) are arranged in parallel, the screw rod (23) and the guide rod (24) are rotationally connected between the two connecting plates (22), a containing cavity is formed in one connecting plate (22), a second motor (28) for driving the screw rod (23) to rotate is connected to the connecting plate (22) through the containing cavity, the mounting seat (25) is in threaded connection with the screw rod (23), the guide rod (24) penetrates through the mounting seat (25), and the welding gun (27) is connected to the mounting seat (25) through a cylinder (26).

8. The tube wall welding device for a curved tube sheet according to claim 7, wherein: a distance sensor (29) for measuring the distance between the welding gun (27) and the side wall of the curved tube plate is connected to the piston rod of the air cylinder (26), and the distance sensor (29) is electrically connected with the air cylinder (26).