Short pipe flange welding device

Abstract

The invention provides a short pipe flange welding device, and relates to the technical field of welding devices. The short pipe flange welding device comprises a welding gun, a rotating plate, ejector rods, an ejector plate, an anti-skid gasket, an adjusting mechanism and a driving mechanism, the ejector rods are arranged on the side face of the rotating plate, the adjusting mechanism is used for driving the ejector rods to synchronously move in the same direction or away from one another, and the ejector plate is arranged in the ejector rods. The driving mechanism is used for driving the top plate to slide outwards or inwards relatively in the ejector rod, the anti-skid gasket is arranged on the side face of the top plate, the welding gun is arranged at the lower end of the ejector rod, and the rotating plate can rotate. The overall outer diameter of the multiple ejector rods is driven to be increased through the adjusting mechanism, so that coaxial butt joint and supporting of short pipe flanges are facilitated, and the butt joint efficiency and the butt joint precision are improved; the ejection plates and the anti-skid gaskets slide outwards through the driving mechanism to extrude the inner wall of the short pipe flange, the contact friction between the ejection rods and the short pipe and the inner wall of the flange is improved through deformation of the anti-skid gaskets, the relative positions of the ejection rods and the short pipe flange are fixed, and the welding precision is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding device, in particular to a short pipe flange welding device. BACKGROUND

[0002] Short pipe flange welding refers to connecting short pipe section and flange through welding process to form detachable connecting components of pipeline system, and its core function is to facilitate quick docking of pipeline, valve, equipment or other pipe fittings while ensuring sealing and pressure bearing capacity.

[0003] In non-standard and small batch production workshops, manual welding is still the mainstream welding method, and workers generally align short pipes and flanges through scribing method or self-made tools, which is based on workers' experience, but has problems of insufficient docking accuracy and low docking efficiency, and stability needs to be improved during welding. SUMMARY

[0004] To solve the above problems, the present application provides a short pipe flange welding device.

[0005] The present application provides a short pipe flange welding device, which comprises a welding gun, a rotating plate, a top rod, a top plate, an anti-skid pad, an adjusting mechanism and a driving mechanism. Multiple top rods are evenly arranged on the side surface of the rotating plate. The adjusting mechanism is arranged in the middle part of the rotating plate and is used to drive multiple top rods to move synchronously towards or away from each other. The top plate is arranged inside the top rod. The driving mechanism is arranged inside the end part of the top rod and is used to drive the top plate to slide outwards or inwards inside the top rod. The anti-skid pad is attached to the side surface of the top plate. The welding gun is arranged at the lower end of the top rod. The rotating plate is rotatable.

[0006] Optionally, the adjusting mechanism comprises a center column, a fixed ring, a guide rod, a sliding block, a servo motor, a driving plate and an arc-shaped groove. The center column is fixedly arranged in the middle part of the side surface of the rotating plate. The fixed ring is fixedly arranged at the edge of the side surface of the rotating plate. Multiple evenly distributed guide rods are tightly connected between the outer periphery of the center column and the inner wall of the fixed ring. The middle part of the sliding block is slidingly connected to the outside of the corresponding guide rod. The sliding block is slidingly attached to the side surface of the rotating plate. The end part of the top rod is fixedly arranged on the end surface of the corresponding sliding block. The servo motor is fixedly arranged in the middle part of the side surface of the rotating plate, and the output shaft extends and is fixedly installed with the driving plate. Multiple arc-shaped grooves are evenly arranged inside the driving plate. The outside of the top rod is in contact with the inside of the arc-shaped groove.

[0007] Optionally, a rectangular groove is formed in the outer periphery of the top rod, a top plate is slidably connected to the inner wall of the rectangular groove, a plurality of uniformly distributed springs are fastened between the side of the top plate away from the non-slip gasket and the inner bottom surface of the rectangular groove, the space enclosed by the rectangular groove and the top plate is a closed space, and the closed space is filled with hydraulic oil, and the driving mechanism can increase or decrease the hydraulic oil in the closed space.

[0008] Optionally, the top plate and the non-slip gasket are located inside the rectangular groove in the initial state.

[0009] Optionally, the driving mechanism includes a circular cavity, a first circular hole, a second circular hole, a driving head, a connecting rod, a rotating head, a groove, a piston plate, a guide column, and a guide groove. The circular cavity is formed in the end of the top rod, the first circular hole and the second circular hole are formed at the two ends of the circular cavity, the first circular hole is in communication with the outside, the second circular hole is in communication with the rectangular groove, the piston plate is slidably connected to the inner wall of the circular cavity, the driving head is threadedly connected to the outside of the first circular hole, the connecting rod is fixedly arranged on the middle of the end surface of the rotating head, the connecting rod is fixedly arranged on the middle of the end surface of the driving head, the groove is formed in the middle of the end surface of the piston plate, the rotating head is rotatably connected to the inside of the groove, the two guide columns are symmetrically fixedly arranged on the two sides of the end surface of the piston plate, the guide grooves are symmetrically formed on the two sides of the inner wall of the circular cavity, the guide columns are slidably connected to the inside of the guide grooves, and the space enclosed by the piston plate and the circular cavity is filled with hydraulic oil.

[0010] Optionally, a plurality of top plates are arranged radially outward of the rotating plate.

[0011] Optionally, a support ring is rotatably connected to the outside of the rotating plate through a bearing, and a support plate is fixedly connected to the bottom end of the support ring.

[0012] Optionally, an electric guide rail is fixedly arranged on the bottom end of the support plate, and a welding gun is arranged on the upper end of the electric guide rail slide.

[0013] Optionally, a hydraulic cylinder is fixedly installed on the upper end of the electric guide rail slide, and a welding gun is fixedly installed on the output end of the hydraulic cylinder.

[0014] The short pipe flange welding device has the advantages that: the adjusting mechanism drives multiple jacks to move synchronously and away from each other, so that the overall outer diameter of the multiple jacks increases, thereby supporting the inner side of the short pipe, then the flange is sleeved on the outer side of the multiple jacks, and the end of the flange is in contact with the end of the short pipe, so that the short pipe and the flange can be coaxially butted and supported quickly, and the butt joint efficiency and accuracy are improved; the driving mechanism drives multiple jacks to slide outwards relative to the inside of the corresponding jack, so that the anti-skid gaskets on the sides of the jacks extrude the inner walls of the short pipe and the flange, the deformation of the anti-skid gaskets improves the contact friction between the multiple jacks and the inner walls of the short pipe and the flange, and the relative positions of the multiple jacks and the short pipe and the flange are fixed, so that the short pipe and the flange can stably rotate synchronously with the rotating plate during welding, and the welding accuracy is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a whole three-dimensional structure schematic diagram of the short pipe flange welding device of the embodiment of the present application. Figure 2 It is a rotating plate side surface structure schematic diagram in the short pipe flange welding device of the embodiment of the present application. Figure 3 It is a fixed ring inner side structure schematic diagram in the short pipe flange welding device of the embodiment of the present application. Figure 4 It is a jack internal structure schematic diagram in the short pipe flange welding device of the embodiment of the present application. Figure 5 It is a rotating head structure schematic diagram in the short pipe flange welding device of the embodiment of the present application. Figure 6 It is a jack position distribution schematic diagram in the short pipe flange welding device of the embodiment of the present application. Figure 7 It is Figure 4 It is an enlarged view of structure A in Figure 8 It is an enlarged view of structure B in Figure 4

[0016] BRIEF DESCRIPTION OF DRAWINGS: 100, electric guide rail; 101, hydraulic cylinder; 102, welding gun; 103, support plate; 104, support ring; 200, rotating plate; 201, center column; 202, fixed ring; 203, guide rod; 204, sliding block; 205, servo motor; 206, driving plate; 207, arc-shaped groove; 300, jack; 301, rectangular groove; 302, jack plate; 303, anti-skid gasket; 304, spring; 400, circular cavity; 401, first circular hole; 402, second circular hole; 403, driving head; 404, connecting rod; 405, rotating head; 406, groove; 407, piston plate; 408, guide column; 409, guide groove. DETAILED DESCRIPTION ​

[0017] In order to make the above objectives, features and advantages of the present application more obvious and comprehensible, specific embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0018] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0019] In the description of the present application, the description of the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" means that the specific features, structures, materials or characteristics described in connection with the embodiment or embodiment are included in at least one embodiment or embodiment of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0020] The terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features.

[0021] As shown in Figures 1-8 The present embodiment provides a short tube flange welding device, which comprises a welding gun 102, a rotating plate 200, a plurality of jacks 300, a top plate 302, an anti-skid gasket 303, an adjusting mechanism and a driving mechanism. The plurality of jacks 300 are uniformly arranged on the side surface of the rotating plate 200. The adjusting mechanism is arranged in the middle part of the rotating plate 200 and is used to drive the plurality of jacks 300 to move synchronously towards or away from each other. The top plate 302 is arranged inside the jacks 300. The driving mechanism is arranged in the end part of the jacks 300 and is used to drive the top plate 302 to slide outwards or inwards in the jacks 300. The anti-skid gasket 303 is attached to the side surface of the top plate 302. The welding gun 102 is arranged at the lower end of the jacks 300. The rotating plate 200 is rotatable.

[0022] When the short pipe and the flange need to be welded in this embodiment, first, the inside of the short pipe is sleeved outside the plurality of jacks 300, then the plurality of jacks 300 are driven to move away from each other synchronously by the adjusting mechanism, so that the overall outer diameter of the plurality of jacks 300 increases, thereby supporting the inside of the short pipe; at this time, the center line of the short pipe coincides with the center line of the rotating plate 200, and at this time, the position of the short pipe relative to the plurality of jacks 300 is preliminarily fixed; then the inside of the flange is sleeved outside the plurality of jacks 300, and then the flange is moved horizontally so that the butt joint of the flange is aligned with the end of the short pipe; since the inner diameters of the short pipe and the flange are the same, and the overall outer diameter of the plurality of jacks 300 has been adjusted, at this time, the center line of the flange coincides with the center line of the short pipe; next, the plurality of jacks 300 are driven by the driving mechanism to slide outwards relative to the inside of the corresponding jacks 300, so that the anti-skid pads 303 on the sides of the plurality of jacks 302 press the inner walls of the short pipe and the flange, the anti-skid pads 303 are deformed to increase the contact friction between the plurality of jacks 300 and the inner walls of the short pipe and the flange, thereby improving the contact stability, so that the relative positions of the plurality of jacks 300 and the short pipe and the flange are fixed, and the support stability of the jacks 300 is improved; then the rotating plate 200 is slowly rotated, and the welding of the welding gun 102 is performed, so that the connection between the short pipe and the flange is welded; after the welding is completed, the plurality of jacks 300 are driven by the driving mechanism to slide into the corresponding jacks 300; then the plurality of jacks 300 are driven to move towards each other synchronously by the adjusting mechanism, so that the overall outer diameter of the plurality of jacks 300 decreases; then the welded short pipe and the flange are horizontally taken out from the outside of the jacks 300. The plurality of jacks 300 are driven to move away from each other synchronously by the adjusting mechanism, so that the overall outer diameter of the plurality of jacks 300 increases, thereby supporting the inside of the short pipe; then the flange is sleeved outside the plurality of jacks 300, so that the end of the flange is aligned with the end of the short pipe, thereby quickly coaxially butting and supporting the short pipe and the flange, improving the butt joint efficiency and precision; the plurality of jacks 300 are driven by the driving mechanism to slide outwards relative to the inside of the corresponding jacks 300, so that the anti-skid pads 303 on the sides of the plurality of jacks 302 press the inner walls of the short pipe and the flange, the anti-skid pads 303 are deformed to increase the contact friction between the plurality of jacks 300 and the inner walls of the short pipe and the flange, so that the relative positions of the plurality of jacks 300 and the short pipe and the flange are fixed, so that the short pipe and the flange can stably follow the rotating plate 200 to rotate synchronously during welding, thereby ensuring the welding precision.

[0023] As Figure 1 , Figure 2 and Figure 3As shown, the adjusting mechanism comprises a center column 201, a fixed ring 202, guide rods 203, sliding blocks 204, a servo motor 205, a driving plate 206, and arc-shaped grooves 207. The center column 201 is fixedly arranged at the middle of the side of the rotating plate 200, and the fixed ring 202 is fixedly arranged at the edge of the side of the rotating plate 200. A plurality of uniformly distributed guide rods 203 are tightly connected between the outer periphery of the center column 201 and the inner wall of the fixed ring 202. The middle of the sliding block 204 is slidingly connected to the outside of the corresponding guide rod 203, and the sliding block 204 is slidingly attached to the side of the rotating plate 200. The end of the top rod 300 is fixedly arranged on the end face of the corresponding sliding block 204. The servo motor 205 is fixedly arranged at the middle of the side of the rotating plate 200, and the output shaft extends and is fixedly installed with the driving plate 206. A plurality of arc-shaped grooves 207 are uniformly arranged in the inside of the driving plate 206, and the outside of the top rod 300 is in contact with the inside of the arc-shaped groove 207.

[0024] In this embodiment, due to the guidance and limiting of the guide rods 203, the plurality of sliding blocks 204 can only move linearly along the radial direction of the rotating plate 200. When the output shaft of the servo motor 205 rotates, it can drive the driving plate 206 to rotate relative to the rotating plate 200. Because the outside of the top rod 300 is in contact with the inside of the arc-shaped groove 207, when the driving plate 206 rotates, it drives the plurality of arc-shaped grooves 207 to rotate synchronously. Then, through the pushing force of the inside of the arc-shaped groove 207, the plurality of top rods 300 and sliding blocks 204 move synchronously towards or away from each other, so that the overall outer diameter of the plurality of top rods 300 can be adjusted to be larger or smaller, in order to support and fix the flanges of the pipes with different inner diameters. When the overall outer diameter of the plurality of top rods 300 is adjusted to be larger, the short pipe and the flange can be quickly coaxially butted and supported, improving the butt joint efficiency and precision. When the overall outer diameter of the plurality of top rods 300 is adjusted to be smaller, the welded short pipe flange can be taken out.

[0025] As shown in Figure 4 With Figure 7 As shown, a rectangular groove 301 is formed in the outer periphery of the top rod 300. A top plate 302 is slidingly connected to the inner wall of the rectangular groove 301. A plurality of uniformly distributed springs 304 are tightly connected between the side of the top plate 302 away from the non-slip pad 303 and the inner bottom surface of the rectangular groove 301. The space enclosed by the rectangular groove 301 and the top plate 302 is a closed space, which is filled with hydraulic oil. The driving mechanism can increase or decrease the hydraulic oil in the closed space.

[0026] In the embodiment, the driving mechanism increases the hydraulic oil in the closed space, and as the hydraulic oil in the closed space increases, the hydraulic oil pressure increases, the top plate 302 is pushed to slide outwards in the rectangular groove 301, the anti-skid pad 303 is synchronously moved, the anti-skid pad 303 is pressed on the inner wall of the pipeline flange, the friction between the top rod 300 and the inner wall of the pipeline flange is increased through the deformation of the anti-skid pad 303, and then the relative stability between the pipeline flange and the top rod 300 is increased, so as to improve the welding precision. At this time, the spring 304 is in a stretched state; the driving mechanism reduces the hydraulic oil in the closed space, and as the hydraulic oil in the closed space decreases, the hydraulic oil pressure decreases, the top plate 302 drives the anti-skid pad 303 to move into the rectangular groove 301 for resetting under the deformation recovery of the spring 304, so as to take out the short pipe flange.

[0027] As shown in Figure 4 , optionally, the top plate 302 and the anti-skid pad 303 are located inside the rectangular groove 301 in the initial state.

[0028] In the embodiment, the top rod 300 supports the pipeline, so that the flange is sleeved on the top rod 300 and then butt jointed, and then the top plate 302 and the anti-skid pad 303 are driven to slide outwards for extrusion, so as to ensure the structural rationality, and the top plate 302 and the anti-skid pad 303 cannot interfere with the sleeving of the flange.

[0029] As shown in Figure 4 , Figure 5 and Figure 8 , optionally, the driving mechanism includes a circular cavity 400, a first circular hole 401, a second circular hole 402, a driving head 403, a connecting rod 404, a rotating head 405, a groove 406, a piston plate 407, a guide column 408 and a guide groove 409. The circular cavity 400 is arranged in the end of the top rod 300, and the first circular hole 401 and the second circular hole 402 are arranged at the two ends of the circular cavity 400 respectively. The first circular hole 401 is in communication with the outside, and the second circular hole 402 is in communication with the rectangular groove 301. The piston plate 407 is slidably connected to the inner wall of the circular cavity 400. The driving head 403 is threadedly connected to the inner side of the first circular hole 401. The connecting rod 404 is fixedly arranged on the middle part of the end face of the driving head 403. The connecting rod 404 is fixedly arranged on the middle part of the end face of the driving head 403. The groove 406 is arranged in the middle part of the end face of the piston plate 407. The rotating head 405 is rotatably connected to the inner side of the groove 406. The two guide columns 408 are symmetrically fixedly arranged on the two sides of the end face of the piston plate 407. The guide grooves 409 are symmetrically arranged on the two sides of the inner wall of the circular cavity 400. The guide columns 408 are slidably connected to the inner side of the guide grooves 409. The space surrounded by the piston plate 407 and the circular cavity 400 is filled with hydraulic oil.

[0030] In this embodiment, the piston plate 407 is connected to the inner side of the guide groove 409 through the two side guide columns 408, so that the piston plate 407 can only move along the axis reciprocating in the inner side of the circular cavity 400. By rotating the driving head 403 through a tool, the driving head 403 rotates and moves linearly due to the threaded design, and drives the rotating head 405 to rotate and move linearly through the connecting rod 404. Since the rotating head 405 is rotatably connected to the inner side of the groove 406, the piston plate 407 is driven to move along the axis reciprocating. When the piston plate 407 moves towards the second circular hole 402, the hydraulic oil in the space is extruded, so that the hydraulic oil enters the rectangular groove 301 through the second circular hole 402, thereby driving the top plate 302 to slide outwards relative to the inside of the top rod 300. When the piston plate 407 moves away from the second circular hole 402, the hydraulic oil in the space begins to increase because the hydraulic oil in the rectangular groove 301 enters the circular cavity 400 through the second circular hole 402. At this time, the driving top plate 302 slides into the inside of the top rod 300 relative to the inside.

[0031] As shown in Figure 6 , optionally, a plurality of top plates 302 are arranged radially outwardly along the rotating plate 200.

[0032] In this embodiment, a plurality of top plates 302 are arranged radially outwardly along the rotating plate 200, so that when a plurality of top plates 302 are subsequently moved away from each other synchronously, the inner wall of the pipe flange can be extruded.

[0033] As shown in Figure 1 , optionally, the rotating plate 200 is rotatably connected with a support ring 104 on the outside through a bearing, and the support ring 104 is fixedly connected with a support plate 103 at the bottom end.

[0034] In this embodiment, the support plate 103 supports the support ring 104, and in turn supports the rotating plate 200. The rotating plate 200 can rotate in the support ring 104. By rotating the rotating plate 200, the pipe flange outside the top rod 300 can be welded.

[0035] As shown in Figure 1 , optionally, the support plate 103 is fixedly provided with an electric guide rail 100 at the bottom end, and the electric guide rail 100 is provided with a welding gun 102 at the upper end of the sliding seat.

[0036] In this embodiment, the electric guide rail 100 is a prior art, and its working principle and structure will not be described again. Here, the electric guide rail 100 drives the sliding seat to move horizontally and reciprocally, and in turn drives the welding gun 102 to move synchronously. The horizontal position of the welding gun 102 is adjusted to facilitate welding.

[0037] As shown in Figure 1 , optionally, the electric guide rail 100 is fixedly installed with a hydraulic cylinder 101 at the upper end of the sliding seat, and the welding gun 102 is fixedly installed on the output end of the hydraulic cylinder 101.

[0038] In this embodiment, the height of the welding torch 102 is adjusted by driving the welding torch 102 vertically to rise or fall by the hydraulic cylinder 101, so that the welding torch 102 can weld the pipe flange butt joint.

[0039] Although the present application has been disclosed as above, the protection scope of the present application is not limited to this. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, and these changes and modifications shall fall within the protection scope of the present application.

Claims

1. A short pipe flange welding device characterized by comprising: The welding gun (102), the rotating plate (200), the top rod (300), the top plate (302), the anti-skid washer (303), the adjusting mechanism and the driving mechanism, a plurality of the top rod (300) is uniformly arranged on the side of the rotating plate (200), the adjusting mechanism is arranged in the middle of the rotating plate (200), for driving a plurality of top rod (300) synchronous or away from the movement, the top plate (302) is arranged inside the top rod (300), the driving mechanism is arranged in the end of the top rod (300), the driving mechanism is used for driving the top plate (302) in the top rod (300) relative to the outward sliding or sliding into, the anti-skid washer (303) is attached to the side of the top plate (302), the welding gun (102) is arranged at the lower end of the top rod (300), the rotating plate (200) can rotate.

2. The spool flange welding apparatus of claim 1, wherein, The adjusting mechanism includes a center column (201), a fixed ring (202), a guide rod (203), a sliding block (204), a servo motor (205), a driving plate (206) and an arc-shaped groove (207), the center column (201) is fixedly arranged in the middle of the side of the rotating plate (200), the fixed ring (202) is fixedly arranged at the edge of the side of the rotating plate (200), a plurality of uniformly distributed guide rods (203) are tightly connected between the outer periphery of the center column (201) and the inner wall of the fixed ring (202), the sliding block (204) is slidingly connected to the outer side of the corresponding guide rod (203), the sliding block (204) is slidingly attached to the side of the rotating plate (200), the end of the top rod (300) is fixedly arranged on the end face of the corresponding sliding block (204), the servo motor (205) is fixedly arranged in the middle of the side of the rotating plate (200), and the output shaft is extended and fixedly installed with the driving plate (206), a plurality of arc-shaped grooves (207) are uniformly arranged in the inside of the driving plate (206), and the outside of the top rod (300) is in contact with the inside of the arc-shaped groove (207).

3. The spool flange welding apparatus of claim 1, wherein, The outer periphery of the top rod (300) is provided with a rectangular groove (301), the top plate (302) is slidingly connected to the inner wall of the rectangular groove (301), a plurality of uniformly distributed springs (304) are tightly connected between the side of the top plate (302) away from the anti-skid washer (303) and the inner bottom surface of the rectangular groove (301), the space formed by the rectangular groove (301) and the top plate (302) is a closed space, the closed space is filled with hydraulic oil, and the driving mechanism can increase or reduce the hydraulic oil in the closed space.

4. The spool flange welding apparatus of claim 1 wherein, The top plate (302) and the anti-skid washer (303) are located inside the rectangular groove (301) in the initial state.

5. The spool flange welding apparatus of claim 3 wherein, The driving mechanism comprises a circular cavity (400), a first circular hole (401), a second circular hole (402), a driving head (403), a connecting rod (404), a rotating head (405), a groove (406), a piston plate (407), a guide column (408) and a guide groove (409), the circular cavity (400) is arranged in the end of the ejector rod (300), the two ends of the circular cavity (400) are respectively provided with the first circular hole (401) and the second circular hole (402), the first circular hole (401) is communicated with the outside, the second circular hole (402) is communicated with the rectangular groove (301), the piston plate (407) is slidably connected to the inner wall of the circular cavity (400), the outer side of the driving head (403) is threadedly connected to the inner side of the first circular hole (401), the connecting rod (404) is fixedly arranged on the middle part of the end surface of the rotating head (405), the connecting rod (404) is fixedly arranged on the middle part of the end surface of the driving head (403) away from the rotating head (405), the groove (406) is arranged in the middle part of the end surface of the piston plate (407), the rotating head (405) is rotatably connected to the inner side of the groove (406), the two guide columns (408) are symmetrically fixedly arranged on the two sides of the end surface of the piston plate (407), the guide grooves (409) are symmetrically arranged on the two sides of the inner wall of the circular cavity (400), the guide columns (408) are slidably connected to the inner sides of the guide grooves (409), and the space surrounded by the piston plate (407) and the circular cavity (400) is filled with hydraulic oil.

6. The spool flange welding apparatus of claim 1 wherein, A plurality of top plates (302) are arranged radially outwardly on the rotating plate (200).

7. The spool flange welding apparatus of claim 1 wherein, The rotating plate (200) is rotatably connected with a support ring (104) through a bearing on the outer side, and the bottom end of the support ring (104) is fixedly connected with a support plate (103).

8. The spool flange welding apparatus of claim 7, wherein, The bottom end of the support plate (103) is fixedly provided with an electric guide rail (100), and the upper end of the sliding seat of the electric guide rail (100) is provided with a welding gun (102).

9. The spool flange welding apparatus of claim 8, wherein, The upper end of the sliding seat of the electric guide rail (100) is fixedly provided with a hydraulic cylinder (101), and the output end of the hydraulic cylinder (101) is fixedly provided with a welding gun (102).

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