An annular welding device for a pressure vessel cylinder

Abstract

The present application relates to the technical field of welding equipment, and discloses an annular welding device for a pressure vessel cylinder body, including a base. One end of the base is provided with a clamping device I, and the other end is provided with a clamping device II. The clamping device I is connected to the base through a hydraulic tilting table. When the hydraulic tilting table adjusts the clamping device I to the horizontal state, at this time, the clamping device I corresponds to the clamping device II, and they jointly clamp the pressure vessel cylinder body to be welded that is horizontally placed. When the hydraulic tilting table adjusts the clamping device I to the vertical state, at this time, the clamping device I clamps the pressure vessel cylinder body to be welded that is vertically placed. The clamping devices II are connected through a sliding device. Through the cooperation of the annular welding mechanism and the inclination angle adjusting device, annular welding can be performed on fixed flanges at any angle on the pressure vessel, thereby solving the defects of the existing welding equipment and improving the applicability of the welding equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and particularly to an annular welding device for a pressure vessel cylinder body. Background Art

[0002] As an extremely crucial device in the industrial field, pressure vessels are widely used in many industries such as petrochemical, energy and power, aerospace, etc. They are mainly used for storing and transporting various gaseous or liquid media under pressure. In the manufacturing process of pressure vessels, the welding of the cylinder body is a core process, and its welding quality directly affects the overall safety, reliability and service life of the pressure vessel.

[0003] Most of the existing pressure vessel welding equipment clamps the pressure vessel horizontally or vertically, aligns the welding equipment with the welding position, and drives the pressure vessel to rotate for annular welding. This kind of welding is based on rotating around the axis of the pressure vessel. However, for the welding of fixed flanges on the pressure vessel, this method is difficult to achieve because the axes of some fixed flanges deviate from the axis of the pressure vessel, which means that annular welding cannot be achieved by rotating the pressure vessel. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an annular welding device for a pressure vessel cylinder body, which solves the problem of inconvenient welding of fixed flanges by the existing pressure vessel welding equipment.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An annular welding device for a pressure vessel cylinder body includes a base. One end of the base is provided with a clamping device I, and the other end is provided with a clamping device II. The clamping device I is connected to the base through a hydraulic tilting table. When the hydraulic tilting table adjusts the clamping device I to the horizontal state, the clamping device I corresponds to the clamping device II at this time, and they jointly clamp the horizontally placed pressure vessel cylinder body to be welded. When the hydraulic tilting table adjusts the clamping device I to the vertical state, the clamping device I clamps the vertically placed pressure vessel cylinder body to be welded. The clamping device II is connected through a sliding device, and the sliding device is used to adjust the distance between the clamping device II and the clamping device I. Auxiliary clamping devices are respectively arranged on both sides of the clamping device I, and the auxiliary clamping devices are slidably connected to the base for auxiliary support of the pressure vessel cylinder body to be welded. An annular welding mechanism is arranged above the base. The welding part of the annular welding mechanism rotates around the outside of the pressure vessel cylinder body to be welded for welding. Both ends of the annular welding mechanism are respectively connected to a linear displacement device through columns, and an inclination angle adjusting device is further arranged between the annular welding mechanism and the columns for adjusting the relative inclination angle between the annular welding mechanism and the pressure vessel cylinder body to be welded.

[0006] Preferably, the first clamping device includes a first clamping table, one side of the first clamping table is fixedly connected to the flipping end of the hydraulic flipping table, and an inner expanding fixture is arranged on the other side. The inner expanding fixture extends into the cylinder body of the pressure vessel to be welded and clamps and fixes it internally.

[0007] Preferably, the second clamping device includes a second clamping table, and an inner expanding fixture is arranged on the side of the second clamping table opposite to the first clamping table. The inner expanding fixture extends into the cylinder body of the pressure vessel to be welded and clamps and fixes it internally.

[0008] Preferably, the sliding device includes a chute, which is opened in the upper part of the base. A lead screw is rotatably connected in the chute. One end of the lead screw penetrates through the chute wall and is fixedly connected to the output end of the first motor. The outer wall of the first motor is fixedly connected to the outer wall of the base. A sliding base is slidably connected in the chute. The bottom of the sliding base is sleeved and threadedly connected to the threaded part of the lead screw. The upper surface of the sliding base is fixedly connected to the bottom wall of the second clamping table.

[0009] Preferably, the auxiliary clamping device includes a plurality of sliding rods and V-shaped stop rods. The plurality of sliding rods are symmetrically distributed on the front and rear sides of the base. A lifting rod is sleeved and slidably connected to the outer wall of the sliding rods on the same side. A locking buckle is also arranged between the lifting rod and the sliding rod for locking and fixing the lifting rod on the sliding rod. The upper part of the lifting rod is sequentially provided with a horizontal card slot and a vertical card slot on the side facing the base. The bent part of the V-shaped stop rod is fixedly connected to the output end of the electric push rod. A pin is arranged on the outer cylinder end face of the electric push rod. When the pin is clamped in the horizontal card slot, the V-shaped stop rod is used to assist in supporting the cylinder body of the pressure vessel to be welded in the vertical state. When the pin is clamped in the vertical card slot, the V-shaped stop rod is used to assist in supporting the cylinder body of the pressure vessel to be welded in the horizontal state.

[0010] Preferably, the annular welding mechanism includes an outer ring body. Two symmetrically arranged rotating shafts are fixedly connected to the outer side wall of the outer ring body. The outer ends of the two rotating shafts are respectively rotatably connected to the upper parts of the corresponding two columns. An inner ring body is embedded and rotatably connected in the outer ring body. A toothed ring is fixedly connected to one side of the inner ring body, and a welding device is arranged on the other side. The tooth end of the toothed ring is meshed with a bevel gear. The center of the bevel gear is fixedly connected to the output end of the second motor. The outer wall of the second motor is fixedly connected to the side wall of the outer ring body.

[0011] Preferably, the inclination angle adjusting device is arranged between the rotating shaft and the column. It includes an angle monitoring unit, a control unit and an execution unit. The angle monitoring unit is used to monitor the current inclination angle of the annular welding mechanism. The control unit is used to receive control commands and control the execution unit to drive the rotating shaft to rotate by a corresponding angle.

[0012] Preferably, the welding device is installed on the moving end of a linear electric slide rail, and the outer wall of the linear electric slide rail is fixedly connected to the side wall of the inner ring body. The welding device is driven by the linear electric slide rail to linearly move between the center of the inner ring body and the ring wall.

[0013] Preferably, an electric iris structure member is provided between the welding device and the inner ring body. The welding device is installed on one of the blades of the electric iris structure member, and the outer side wall of the electric iris structure member is fixedly connected to the side wall of the inner ring body. The welding device is driven by the electric iris structure member to move between the center of the inner ring body and the ring wall, and the welding device always faces the center of the inner ring body.

[0014] Preferably, a preheating unit and a slow cooling unit are respectively provided on the blades of two electric iris structure members adjacent to the welding device, and are respectively used for preheating the welding area before welding and slow cooling after welding.

[0015] The present invention provides an annular welding device for a pressure vessel cylinder body, having the following beneficial effects:

[0016] Through the cooperation of the clamping device I, the clamping device II, the auxiliary clamping device and the annular welding mechanism, the present invention can not only perform annular welding on the pressure vessel in a vertical state, but also perform annular welding on the pressure vessel in a horizontal state, thus meeting the requirements of various welding processes. By using the cooperation of the annular welding mechanism and the inclination angle adjusting device, annular welding can be performed on the fixed flange at any angle on the pressure vessel, thus solving the defects of the existing welding equipment and improving the applicability of the welding equipment. At the same time, by cooperating with the electric iris structure member or the linear electric slide rail installed on the annular welding mechanism, welding of pressure vessels of different sizes is realized, further improving the versatility of the welding equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front orthographic perspective view of an annular welding device for a pressure vessel cylinder body of the present invention;

[0018] Figure 2 is Figure 1 the enlarged view at A in

[0019] Figure 3 is Figure 1 the enlarged view at B in

[0020] Figure 4 is a rear orthographic perspective view of an annular welding device for a pressure vessel cylinder body of the present invention;

[0021] Figure 5 is Figure 4 the enlarged view at C in

[0022] Figure 6Schematic structural diagram of the sliding device in the present invention;

[0023] Figure 7 Another schematic structural diagram of the annular welding mechanism in the present invention.

[0024] Wherein, 1, base; 101, chute; 2, clamping device I; 201, clamping table I; 202, internal expansion fixture I; 3, clamping device II; 301, clamping table II; 302, internal expansion fixture II; 4, hydraulic tilting table; 5, auxiliary clamping device; 501, slide bar; 502, V-shaped stop bar; 503, lifting rod; 504, electric push rod; 6, annular welding mechanism; 601, outer ring body; 602, rotating shaft; 603, inner ring body; 604, gear ring; 605, welding equipment; 606, bevel gear; 607, motor II; 608, linear electric slide rail; 609, electric aperture structural member; 7, support column; 8, linear displacement device; 9, lead screw; 10, motor I; 11, sliding base. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Please refer to the attached Figure 1 - attached Figure 6, an embodiment of the present invention provides an annular welding device for a pressure vessel cylinder body, including a base 1. One end of the base 1 is provided with a first clamping device 2, and the other end is provided with a second clamping device 3. The first clamping device 2 is connected to the base 1 through a hydraulic tilting table 4. When the hydraulic tilting table 4 adjusts the first clamping device 2 to a horizontal state, the first clamping device 2 corresponds to the second clamping device 3 at this time, and jointly clamps the horizontally placed pressure vessel cylinder body to be welded. When the hydraulic tilting table 4 adjusts the first clamping device 2 to a vertical state, the first clamping device 2 clamps the vertically placed pressure vessel cylinder body to be welded. The second clamping devices 3 are connected through a sliding device, and the sliding device is used to adjust the distance between the second clamping device 3 and the first clamping device 2. Auxiliary clamping devices 5 are respectively arranged on both sides of the first clamping device 2, and the auxiliary clamping devices 5 are slidably connected to the base 1 for auxiliary support of the pressure vessel cylinder body to be welded. An annular welding mechanism 6 is arranged above the base 1. The welding part of the annular welding mechanism 6 rotates around the outer side of the pressure vessel cylinder body to be welded and performs welding. Both ends of the annular welding mechanism 6 are respectively connected to a linear displacement device 8 through columns 7, and an inclination adjustment device is also arranged between the annular welding mechanism 6 and the columns 7 for adjusting the relative inclination angle between the annular welding mechanism 6 and the pressure vessel cylinder body to be welded.

[0027] Through the setting of the hydraulic tilting table 4, when the hydraulic tilting table 4 adjusts the first clamping device 2 to a horizontal state, the first clamping device 2 corresponds to the second clamping device 3 at this time, and jointly clamps the horizontally placed pressure vessel cylinder body to be welded. When the hydraulic tilting table 4 adjusts the first clamping device 2 to a vertical state, the first clamping device 2 clamps the vertically placed pressure vessel cylinder body to be welded. It can not only perform annular welding on the pressure vessel in the vertical state, but also perform annular welding on the pressure vessel in the horizontal state, thus meeting the requirements of various welding processes. At the same time, the annular welding mechanism 6 can not only be sleeved outside the pressure vessel to realize welding in the horizontal or vertical state, but also, with the cooperation of the inclination adjustment device, adapt to the welding angle of the fixed flange, and perform annular welding on the outside of the fixed flange. By using the cooperation of the annular welding mechanism and the inclination adjustment device, annular welding can be performed on any angle fixed flange on the pressure vessel, thus solving the defects of the existing welding equipment and improving the applicability of the welding equipment.

[0028] The first clamping device 2 includes a first clamping table 201. One side of the first clamping table 201 is fixedly connected to the tilting end of the hydraulic tilting table 4, and the other side is provided with an internal expansion clamp 202. The internal expansion clamp 202 extends into the pressure vessel cylinder body to be welded and performs internal expansion clamping and fixing on it. The second clamping device 3 includes a second clamping table 301. An internal expansion clamp 302 is arranged on the side of the second clamping table 301 opposite to the first clamping table 201. The internal expansion clamp 302 extends into the pressure vessel cylinder body to be welded and performs internal expansion clamping and fixing on it.

[0029] Through the cooperation of the first clamping device 2 and the second clamping device 3, the inner expansion clamping and fixation of the openings at both ends of the cylindrical body of the pressure vessel in the horizontal state are realized. When the cylindrical body of the pressure vessel needs to be welded in the vertical state, only the first clamping device 2 needs to be flipped by the hydraulic turning platform 4, and the first clamping device 2 can perform inner expansion clamping on the lower opening of the cylindrical body of the pressure vessel in the vertical state. Then, with the cooperation of the auxiliary clamping device 5, the clamping and fixation of the cylindrical body of the pressure vessel in the vertical state can be realized.

[0030] The sliding device includes a chute 101, which is opened in the upper part of the base 1. A lead screw 9 is rotatably connected in the chute 101. One end of the lead screw 9 penetrates through the wall of the chute 101 and is fixedly connected to the output end of the first motor 10. The outer wall of the first motor 10 is fixedly connected to the outer wall of the base 1. A sliding base 11 is slidably connected in the chute 101. The bottom of the sliding base 11 is sleeved and threadedly connected to the threaded part of the lead screw 9. The upper surface of the sliding base 11 is fixedly connected to the bottom wall of the second clamping table 301.

[0031] The sliding device is used to change the distance between the second clamping device 3 and the first clamping device 2, so that the welding device can realize the clamping and fixation of pressure vessels of different sizes in the horizontal direction.

[0032] The auxiliary clamping device 5 includes a plurality of sliding rods 501 and V-shaped stop rods 502. The plurality of sliding rods 501 are symmetrically distributed on the front and rear sides of the base 1. A lifting rod 503 is sleeved and slidably connected to the outer wall of the sliding rods 501 on the same side. A locking buckle is also provided between the lifting rod 503 and the sliding rod 501 for locking and fixing the lifting rod 503 on the sliding rod 501. Horizontally and vertically arranged card slots are successively opened on the side of the upper part of the lifting rod 503 facing the base 1. The bent part of the V-shaped stop rod 502 is fixedly connected to the output end of the electric push rod 504. A pin is arranged on the outer cylinder end face of the electric push rod 504. When the pin is clamped in the horizontal card slot, the V-shaped stop rod 502 is used to assist in supporting the cylindrical body of the pressure vessel to be welded in the vertical state. When the pin is clamped in the vertical card slot, the V-shaped stop rod 502 is used to assist in supporting the cylindrical body of the pressure vessel to be welded in the horizontal state.

[0033] The auxiliary clamping device 5 is mainly used to provide an auxiliary supporting effect on the cylindrical body of the pressure vessel. The two oppositely directed V-shaped stop rods 502 are moved to appropriate positions and realize the side-direction clamping and fixation of the cylindrical body of the pressure vessel under the action of the electric push rod 504, making the welding process more stable. At the same time, the setting of the V-shaped stop rod 502 also enables it to be applicable to pressure vessels of different sizes. It should be noted that when the base 1 slides to the end point on one side of the first clamping device 2 and the pin is clamped in the horizontal card slot, the symmetry axis of the V-shaped stop rod 502 intersects and is perpendicular to the axis of the pressure vessel.

[0034] The annular welding mechanism 6 includes an outer ring body 601. On the outer side wall of the outer ring body 601, two symmetrically arranged rotating shafts 602 are fixedly connected. The outer ends of the two rotating shafts 602 are respectively rotatably connected to the upper parts of the corresponding two support columns 7. An inner ring body 603 is embedded and rotatably connected inside the outer ring body 601. On one side of the inner ring body 603, a gear ring 604 is fixedly connected, and on the other side, a welding device 605 is arranged. The tooth end of the gear ring 604 is meshed and connected with a bevel gear 606. The center of the bevel gear 606 is fixedly connected to the output end of the second motor 607, and the outer wall of the second motor 607 is fixedly connected to the side wall of the outer ring body 601.

[0035] Insert the pressure vessel into the annular welding mechanism 6 so that the welding device 605 corresponds to the welding position to be welded. Then, the motor 607 drives the gear ring 604 to rotate, driving the inner ring body 603 to rotate around the pressure vessel, thereby realizing the annular welding of the pressure vessel.

[0036] The inclination adjustment device is arranged between the rotating shaft 602 and the support column 7. It includes an angle monitoring unit, a control unit, and an execution unit. Among them, the angle monitoring unit is used to monitor the current inclination angle of the annular welding mechanism 6, and the control unit is used to receive control commands and control the execution unit to drive the rotating shaft 602 to rotate by a corresponding angle.

[0037] At the same time, in order to enable the annular welding mechanism 6 to be applied to welding of various sizes, the following structural improvements are made to it, that is:

[0038] The welding device 605 is installed on the mobile end of a linear electric slide rail 608. The outer wall of the linear electric slide rail 608 is fixedly connected to the side wall of the inner ring body 603. The welding device 605 is driven by the linear electric slide rail 608 to linearly move between the center of the inner ring body 603 and the ring wall.

[0039] The welding device 605 is driven by the linear electric slide rail 608 to linearly move between the center of the inner ring body 603 and the ring wall, thereby realizing the adjustment of the rotation diameter of the annular welding.

[0040] Please refer to the appendix Figure 7 In order to further improve the welding effect, another structural improvement is made to the annular welding mechanism 6, that is:

[0041] An electric iris structure member 609 is provided between the welding device 605 and the inner ring body 603. The welding device 605 is installed on one of the blades of the electric iris structure member 609. The outer side wall of the electric iris structure member 609 is fixedly connected to the side wall of the inner ring body 603. The welding device 605 is driven by the electric iris structure member 609 to move between the center of the inner ring body 603 and the ring wall, and the welding device 605 always faces the center of the inner ring body 603. A preheating unit and a slow cooling unit are respectively arranged on the blades of two electric iris structure members 609 adjacent to the welding device 605, and are respectively used for preheating the welding part before welding and slow cooling after welding.

[0042] On the one hand, the welding device 605 is driven by the electric iris structure member 609 to move between the center of the inner ring body 603 and the ring wall, thereby realizing the adjustment of the rotation diameter of the annular welding; on the other hand, a preheating unit and a slow cooling unit are respectively arranged on the blades of two electric iris structure members 609 adjacent to the welding device 605, realizing preheating before welding and slow cooling after welding, and improving the finished product quality of the welding.

[0043] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An annular welding device for a pressure vessel cylinder body, comprising a base (1), characterized in that, One end of the base (1) is provided with a first clamping device (2), and the other end is provided with a second clamping device (3). The first clamping device (2) is connected to the base (1) through a hydraulic tilting table (4). When the hydraulic tilting table (4) adjusts the first clamping device (2) to the horizontal state, the first clamping device (2) corresponds to the second clamping device (3) at this time, and they jointly clamp the horizontally placed pressure vessel cylinder to be welded. When the hydraulic tilting table (4) adjusts the first clamping device (2) to the vertical state, the first clamping device (2) clamps the vertically placed pressure vessel cylinder to be welded. The second clamping devices (3) are connected through a sliding device, and the sliding device is used to adjust the distance between the second clamping device (3) and the first clamping device (2). Auxiliary clamping devices (5) are respectively arranged on both sides of the first clamping device (2), and the auxiliary clamping devices (5) are slidably connected to the base (1) and are used to assist in supporting the pressure vessel cylinder to be welded. An annular welding mechanism (6) is arranged above the base (1). The welding part of the annular welding mechanism (6) rotates around the outer side of the pressure vessel cylinder to be welded and performs welding. Both ends of the annular welding mechanism (6) are respectively connected to a linear displacement device (8) through columns (7), and an inclination adjustment device is also arranged between the annular welding mechanism (6) and the columns (7) for adjusting the relative inclination angle between the annular welding mechanism (6) and the pressure vessel cylinder to be welded; The annular welding mechanism (6) includes an outer ring body (601). Two symmetrically arranged rotating shafts (602) are fixedly connected to the outer side wall of the outer ring body (601). The outer ends of the two rotating shafts (602) are respectively rotatably connected to the upper parts of the corresponding two columns (7). An inner ring body (603) is embedded and rotatably connected in the outer ring body (601). A gear ring (604) is fixedly connected to one side of the inner ring body (603), and a welding device (605) is arranged on the other side. The tooth end of the gear ring (604) is meshed with a bevel gear (606), and the center of the bevel gear (606) is fixedly connected to the output end of a second motor (607). The outer wall of the second motor (607) is fixedly connected to the side wall of the outer ring body (601).

2. The annular welding device for a pressure vessel cylinder according to claim 1, wherein The first clamping device (2) includes a first clamping table (201). One side of the first clamping table (201) is fixedly connected to the tilting end of the hydraulic tilting table (4), and an inner expanding clamp (202) is arranged on the other side. The inner expanding clamp (202) extends into the pressure vessel cylinder to be welded and clamps and fixes it internally.

3. The annular welding device for the cylinder body of a pressure vessel according to claim 2, characterized in that, The second clamping device (3) includes a second clamping table (301). An inner expanding clamp (302) is arranged on the side of the second clamping table (301) opposite to the first clamping table (201). The inner expanding clamp (302) extends into the pressure vessel cylinder to be welded and clamps and fixes it internally.

4. The annular welding device for a pressure vessel cylinder according to claim 3, characterized in that, The sliding device includes a chute (101) which is opened in the upper part of the base (1). A lead screw (9) is rotatably connected in the chute (101). One end of the lead screw (9) penetrates through the wall of the chute (101) and is fixedly connected to the output end of the first motor (10). The outer wall of the first motor (10) is fixedly connected to the outer wall of the base (1). A sliding base (11) is slidably connected in the chute (101). The bottom of the sliding base (11) is sleeved and threadedly connected to the threaded part of the lead screw (9). The upper surface of the sliding base (11) is fixedly connected to the bottom wall of the second clamping table (301).

5. The annular welding device for the cylindrical body of a pressure vessel according to claim 1, characterized in that, The auxiliary clamping device (5) includes a plurality of sliding rods (501) and a V-shaped stop rod (502). The plurality of sliding rods (501) are symmetrically distributed on the front and rear sides of the base (1). A lifting rod (503) is sleeved and slidably connected to the outer wall of the sliding rods (501) on the same side. A locking buckle is further arranged between the lifting rod (503) and the sliding rod (501) for locking and fixing the lifting rod (503) on the sliding rod (501). A horizontal card slot and a vertical card slot are successively opened on the side of the upper part of the lifting rod (503) facing the base (1). The bent part of the V-shaped stop rod (502) is fixedly connected to the output end of the electric push rod (504). A pin is arranged on the outer cylinder end face of the electric push rod (504). When the pin is clamped in the horizontal card slot, the V-shaped stop rod (502) is used to assist in supporting the cylindrical body of the pressure vessel to be welded in the vertical state. When the pin is clamped in the vertical card slot, the V-shaped stop rod (502) is used to assist in supporting the cylindrical body of the pressure vessel to be welded in the horizontal state.

6. The annular welding device for a pressure vessel cylinder according to claim 1, characterized in that, The inclination angle adjusting device is arranged between the rotating shaft (602) and the support column (7). It includes an angle monitoring unit, a control unit and an execution unit. The angle monitoring unit is used to monitor the current inclination angle of the annular welding mechanism (6). The control unit is used to receive control commands and control the execution unit to drive the rotating shaft (602) to rotate by a corresponding angle.

7. An annular welding device for a pressure vessel cylinder according to claim 1, characterized in that, The welding device (605) is installed on the mobile end of the linear electric slide rail (608). The outer wall of the linear electric slide rail (608) is fixedly connected to the side wall of the inner ring body (603). The welding device (605) is driven by the linear electric slide rail (608) to linearly move between the center of the inner ring body (603) and the ring wall.

8. An annular welding device for a pressure vessel cylinder according to claim 1, characterized in that, An electric iris structural member (609) is arranged between the welding device (605) and the inner ring body (603). The welding device (605) is installed on one of the blades of the electric iris structural member (609). The outer side wall of the electric iris structural member (609) is fixedly connected to the side wall of the inner ring body (603). The welding device (605) is driven by the electric iris structural member (609) to move between the center of the inner ring body (603) and the ring wall, and the welding device (605) always faces the center of the inner ring body (603).

9. The annular welding device for a pressure vessel cylinder according to claim 8, characterized in that, Preheating units and slow cooling units are respectively arranged on the blades of two adjacent electric iris structural members (609) to the welding device (605), which are respectively used for preheating the welding joint before welding and slow cooling after welding.

Images