Method and equipment for assembling and connecting accessories in super-long barrel section box

Abstract

The invention provides super-long barrel section in-box accessory assembling and connecting equipment which comprises a barrel section supporting frame used for supporting a barrel section, a lifting assembly, a rotating assembly, a slewing bearing and a ground horizontal moving device are arranged on the barrel section supporting frame, the lifting assembly is used for moving the barrel section in the height direction, the rotating assembly is used for rotating the barrel section, and the slewing bearing is arranged on the ground horizontal moving device; the lower part of the cylinder section support frame is connected with a ground rail for integrally and horizontally moving the cylinder section; the vertical type large deep throat spot welding system is used for conducting spot welding on the accessories in the barrel section, a welding machine is arranged in the vertical type large deep throat spot welding system, and the vertical type large deep throat spot welding system is arranged on one side of the barrel section supporting frame. The invention further relates to a method for assembling and connecting the accessories in the ultra-long barrel section box based on the equipment for assembling and connecting the accessories in the ultra-long barrel section box. According to the assembling and connecting method and equipment for the accessories in the ultra-long cylinder section box, assembling and welding of the accessories in the ultra-long cylinder section are achieved, and the problems that a traditional spot welding system is short in throat depth and narrow in coverage range are solved.

Description

Technical Field

[0001] The invention belongs to the field of welding assembly, and in particular relates to an assembly and connection method and equipment for accessories in an ultra-long cylinder section box. Background Art

[0002] The principle of resistance spot welding technology is to assemble the workpiece to be welded and place it between two electrodes. A certain pre-pressure is applied through the electrodes to form a real physical contact point on the contact surface of the weldment. The electricity and pressure are then applied in sections. The resistance heat generated by the current is used to melt the metal of the weldment, thereby forming a molten core and achieving an effective connection.

[0003] As a key component of the launch vehicle power system and structural system, the propellant tank plays the role of transmitting force, maintaining shape, storing and transporting propellants, etc. It is generally welded by the front bottom, front short shell, barrel section, rear bottom, and rear short shell. The previous propellant tank barrel section design length was relatively short, only 1.0~2.2m, resulting in a large number of tank barrel sections, a large number of tank longitudinal seams and circumferential seams, high labor intensity for operators, and high manufacturing costs, which is not suitable for future mass production needs.

[0004] At present, the inner wall of each barrel section of the propellant tank is designed with an annular anti-sway frame and bracket and other accessories, which need to be connected to the barrel section by resistance spot welding technology. The existing process method can only meet the assembly and welding of barrel section accessories in a horizontal state, and the maximum weldable length on one side is 1.2m. With the breakthrough of the one-time molding manufacturing process of 4~6m barrel sections, the existing process cannot meet the assembly and connection requirements of the inner wall accessories of ultra-long barrel sections. Summary of the invention

[0005] In view of this, the present invention aims to propose a method and equipment for assembling and connecting accessories inside an ultra-long cylinder section box, so as to solve the problem that the existing process method can only meet the assembly and welding of cylinder section accessories in a horizontal state, and the maximum weldable length on one side is short, which cannot meet the assembly and connection requirements of accessories on the inner wall of ultra-long cylinder sections.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows: The present invention provides an equipment for assembling and connecting accessories in a super-long cylinder section box, comprising: a cylinder section support frame, which is used to support the cylinder section, and is provided with a lifting assembly, a rotating assembly, a slewing bearing, and a ground horizontal moving device. The lifting assembly is used to move the cylinder section in the height direction, and the rotating assembly is used to rotate the cylinder section. The lower part of the cylinder section support frame is connected with a horizontal moving device for the cylinder section to move horizontally along a ground track as a whole. The slewing bearing is used to support the cylinder section and realize rotation at any angle. The slewing bearing power is composed of a servo motor combined with a speed reducer, and is provided with a tooling bottom bracket, and the tooling bottom bracket is evenly distributed with a plurality of A dry limit block; a vertical deep throat spot welding system, which is used to spot weld accessories inside the barrel section, the vertical deep throat spot welding system comprises a welding machine, a fixed side electrode base and a movable side electrode base, the welding machine is provided with an inner electrode and an outer electrode, the inner electrode is a fixed side electrode, the outer electrode is a movable side electrode, the axes of the inner electrode and the outer electrode form an electrode axis, the electrode axis is coplanar with the barrel section axis, the ground track is parallel to the electrode axis, when assembling accessories inside the barrel section, the outer electrode is placed outside the barrel section, the inner electrode is placed inside the barrel section, and the vertical deep throat spot welding system is arranged on one side of the barrel section support frame.

[0007] Furthermore, a lifting assembly is arranged inside the barrel section support frame, the lifting assembly is connected to the rotating assembly and the slewing bearing, and the lifting assembly is a symmetrically installed two-linkage elevator transmission; the rotating motor of the rotating assembly is connected to the grabber fixing frame, the grabber is arranged on the grabber fixing frame, the grabber fixes the side surface of the barrel section, and the arc of the contact between the grabber and the outer surface of the barrel section is adapted; the grabber fixing frame is connected to the fixing frame inside, the upper and lower ends of the fixing frame are fixed with support side plates, and the H-shaped fixing plate is fastened to the end of the support side plate fixing frame by bolts, and the support side plate fixes the upper and lower end surfaces of the barrel section; the barrel section support frame is arranged on the left and right sides of the barrel section.

[0008] Furthermore, a through hole is provided on the tooling base, and the inner electrode connecting part of the welding machine passes through the through hole.

[0009] Furthermore, the limit block is a groove-shaped structure, the inner wall of the limit block is an equal-diameter arc surface, the limit block supports the bottom surface of the barrel section, and the length of the barrel section is 4-6m.

[0010] Furthermore, when the barrel section is lifted to a certain distance by the lifting assembly, the horizontal moving device drives the barrel section support frame to move toward the vertical large deep throat spot welding system along the ground track at a certain speed. When the center of the barrel section coincides with the fixed side electrode base of the vertical large deep throat spot welding system, the motor in the horizontal moving device stops driving.

[0011] Furthermore, when the moving side electrode is in the maximum open state, when the lifting assembly lowers the barrel section to the middle area of ​​the barrel section inner wall so that the attachment and the electrode are at the same height, the motor in the lifting assembly stops driving.

[0012] Furthermore, when the end surface of the inner electrode is in contact with the inner wall of the barrel section, the outer electrode of the vertical large deep throat spot welding system is 5 to 20 mm from the outer surface of the barrel section, and the welding machine is powered on to start welding.

[0013] The present invention also provides a method for assembling and connecting accessories in a super-long barrel section box, comprising: step S1, cleaning the inner and outer surfaces of the area to be welded of the super-long barrel section with a grinding brush, opening the gripper of the equipment for assembling and connecting accessories in the box of the super-long barrel section, hoisting the barrel section from the side and placing it into the inner side of the limit block on the tooling bottom support, and ensuring that the gripper is closed and fits the outer surface of the barrel section after the barrel section has landed stably; step S2, raising the barrel section to a certain distance through the lifting component of the equipment for assembling and connecting accessories in the box of the super-long barrel section, moving it steadily along the ground track to the upper end of the welding machine, and then dropping it to the spot welding area of ​​the accessories; step S3, driving the barrel section to move in the height direction and rotate in the angular position through the lifting component and the rotating component, when the area to be welded of the accessories moves to the vicinity of the inner and outer electrodes, the operator holds the accessories and fixes them in the welding area of ​​the inner wall of the barrel section, so that the welding point of the accessories is pressed and fit with the end surface of the inner electrode; step S4, driving the moving side electrode to 5-20 mm from the outer surface of the barrel section, and energizing the welding; energizing and welding the single-side accessories of the barrel section in sequence from top to bottom Parts, the single-side accessories of the barrel section include all accessories in the middle and lower ends of the barrel section; the single-side accessories of the barrel section include annular anti-sway frame accessories and bracket accessories; step S5, after the spot welding of one side of the barrel section is completed, the barrel section is raised to a certain distance by the lifting assembly, and then the spot welding system is moved horizontally to separate the barrel section from the base, and the base is lowered to the ground height along the guide rail, and the workpiece is rotated 180°; step S6, before flipping, the end face supporting side plates on both sides of the barrel section are in a tightened state, and the grippers on both sides are in a closed and clamped state, so as to ensure that the barrel section is firm and free of collision and falling risks during the flipping process; step S7, after the workpiece is rotated 180°, steps S1-S6 are repeated to assemble and weld the accessories on the other side of the barrel section, and after welding, the welding deformation area of ​​the accessories is corrected by hammering, and the copper traces on the surface of the weld are cleaned by grinding with a wire brush; the extra-long barrel section box accessory assembly and connection equipment involved in steps S1-S7 is the extra-long barrel section box accessory assembly and connection equipment as described in any one of claims 1-7.

[0014] Furthermore, in step S4, the welding steps for annular anti-sway frame accessories and bracket accessories include: step S401, when welding annular anti-sway frame accessories, first position the welds and then perform overall welding; the positioning sequence is from the middle of the accessory to both ends, and the spacing between the positioning welds is 200~300mm. After the positioning is completed, the other welds are formally welded in sequence according to the requirement of 30mm spacing between welds; during the welding process, every 10~15 welds are welded, the inner and outer electrode end surfaces are polished once with 800-mesh sandpaper; step S402, when welding bracket accessories, the number of designed welds is two, the spacing between welds is 25mm, and after the first weld is welded normally, the second weld needs to increase the current by 2~3KA before welding.

[0015] Compared with the prior art, the method and equipment for assembling and connecting accessories in the super-long cylinder section box of the present invention have the following advantages: (1) The method for assembling and connecting accessories in the box of an ultra-long cylinder section of the present invention, combined with its corresponding equipment, realizes the high-quality resistance spot welding technology for the inner wall accessories of an ultra-long cylinder of 6 m, filling the gap in the application of vertical resistance spot welding technology for ultra-long cylinder sections in China.

[0016] (2) The present invention solves the problem of assembly and connection of accessories on the inner wall of super-long cylinder sections. Relying on the vertical large-throat depth spot welding system, a special tooling suitable for the assembly of accessories on the inner wall of super-long cylinder sections of 6m is designed. The lifting assembly adopts a symmetrical two-linked lift to adjust the height of the workpiece, and the lifting process is smooth. The tooling base is installed on the slewing bearing, and the slewing bearing is driven by a servo motor combined with a reducer to drive the cylinder to rotate at any angle. Two sets of limit blocks are installed on the tooling base to ensure that the workpiece is in a round state. The ground guide rail is parallel to the electrode axis to ensure that the axis of the workpiece is coplanar with the axis of the electrode to achieve coaxial parallel movement. Through the functions of internal support, lifting, rotation, etc. of the tooling, the vertical integrated assembly and welding of accessories on the inner wall of super-long cylinder sections is realized, and the weldable length on one side is more than 3m, which solves the problems of short throat depth and narrow coverage of traditional spot welding systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0018] In the attached picture: Figure 1 It is an overall axial side schematic diagram of the accessory assembly and connection equipment in the super-long cylinder section box according to an embodiment of the present invention; Figure 2 It is an overall front view schematic diagram of the accessory assembly and connection equipment in the super-long cylinder section box according to an embodiment of the present invention; Figure 3It is a schematic diagram of AA in the overall front view of the accessory assembly and connection equipment in the super-long cylinder section box according to an embodiment of the present invention; Figure 4 It is a schematic side view of the overall structure of the accessory assembly and connection equipment in the super-long cylinder section box according to an embodiment of the present invention; Figure 5 It is a schematic flow chart of the method for assembling and connecting accessories in a super-long cylinder section box according to an embodiment of the present invention; Figure 6 It is a schematic diagram of electrodes when welding accessories in the method for assembling and connecting accessories in a super-long cylinder section box according to an embodiment of the present invention; Figure 7 It is a schematic diagram of the welding sequence when welding accessories in the method for assembling and connecting accessories in a super-long cylinder section box according to an embodiment of the present invention.

[0019] Description of reference numerals: 1. Ground track; 2. Rotating motor; 3. Cylinder section; 4. Limit block; 5. Grip; 6. Fixed frame; 7. Welding machine; 8. Cylinder section support frame; 9. Support side plate; 10. H-shaped fixed plate; 11. Lifting assembly; 12. Slewing bearing; 13. Accessories; 14. Tooling base; 15. Cylinder longitudinal seam; 16. Bracket accessories; 17. Annular anti-sway frame accessories; 701. Outer electrode; 702. Inner electrode. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0024] See also Figure 1-4 As shown, this embodiment provides an extra-long cylinder section box accessory assembly connection equipment, including a cylinder section support frame 8, which is used to support the cylinder section 3, and is provided with a lifting assembly 11, a rotating assembly, a slewing bearing 12, and a ground horizontal moving device. The lifting assembly 11 is used to move the cylinder section 3 in the height direction, and the rotating assembly is used to rotate the cylinder section 3. The lower part of the cylinder section support frame 8 is connected to the horizontal moving device for the cylinder section 3 to move horizontally along the ground track 1 as a whole. The slewing bearing 12 is used to support the cylinder section 3 and realize rotation at any angle. The slewing bearing 12 is powered by a servo motor combined with a speed reducer, and a plurality of limit blocks are evenly distributed on the tooling bottom bracket 14. 4; A vertical large deep throat spot welding system is used for spot welding the accessories in the barrel section 3. The vertical large deep throat spot welding system comprises a welding machine 7, a fixed side electrode base and a movable side electrode base. The welding machine 7 is provided with an inner electrode 702 and an outer electrode 701. The inner electrode 702 is a fixed side electrode, and the outer electrode 701 is a movable side electrode. The axes of the inner electrode 702 and the outer electrode 701 form an electrode axis. The electrode axis is coplanar with the axis of the barrel section 3, and the ground track 1 is parallel to the electrode axis. When assembling the accessories in the barrel section 3, the outer electrode 701 is placed outside the barrel section 3, and the inner electrode 702 is placed inside the barrel section 3. The vertical large deep throat spot welding system is arranged on one side of the barrel section support frame 8.

[0025] In the embodiment, the stopper 4 is divided into two groups, each group has six pieces, which are compatible with two specifications of cylinders of Φ2250mm and Φ3350mm. When replacing cylinder sections of different diameters, there is no need to replace the drive system and they can be used directly. The stopper is a groove-shaped structure with an inner wall of an equal-diameter arc surface, which can ensure that the cylinder section can fall smoothly into the stopper when it is partially deformed.

[0026] Specifically, in this embodiment, the lifting component 11 is arranged inside the barrel section support frame 8, and the lifting component 11 is connected to the rotating component and the slewing bearing 12. The lifting component 11 is a symmetrically installed two-linkage elevator transmission; the rotating motor 2 of the rotating component is connected to the gripper fixing frame, and the gripper 5 is arranged on the gripper fixing frame. The gripper 5 fixes the side surface of the barrel section 3, and the arc of the contact between the gripper 5 and the outer surface of the barrel section 3 is adapted; the gripper fixing frame is internally connected to the fixing frame 6, and the upper and lower ends of the fixing frame 6 are fixed to the support side plates 9, and the H-shaped fixing plate 10 is fastened to the end of the support side plate 9 fixing frame 6 by bolts, and the support side plate 9 fixes the upper and lower end surfaces of the barrel section 3; the barrel section support frame 8 is arranged on the left and right sides of the barrel section 3.

[0027] Specifically, in this embodiment, a through hole is provided on the tooling base 14, and the connecting part of the inner electrode 702 of the welding machine 7 passes through the through hole.

[0028] Specifically, in this embodiment, the limit block 4 is a groove-shaped structure, the inner wall of the limit block 4 is an arc surface of equal diameter, the limit block 4 supports the bottom surface of the barrel section 3, and the length of the barrel section 3 is 4-6m.

[0029] Specifically, in this embodiment, after the barrel section 3 is lifted to a certain distance by the lifting assembly 11, the horizontal moving device drives the barrel section support frame 8 to move toward the vertical large deep throat spot welding system along the ground track 1 at a certain speed. When the center of the barrel section 3 coincides with the fixed side electrode base of the vertical large deep throat spot welding system, the motor in the horizontal moving device stops driving.

[0030] Specifically, in this embodiment, when the moving side electrode is in the maximum open state, the lifting assembly 11 lowers the barrel section 3 to the middle area of ​​the inner wall of the barrel section 3 until the attachment and the electrode are at the same height, and the motor in the lifting assembly 11 stops driving.

[0031] Specifically, in this embodiment, when the end face of the inner electrode 702 is in contact with the inner wall of the barrel section 3, the outer electrode 701 of the vertical deep throat spot welding system is 5 to 20 mm from the outer surface of the barrel section, and the welding machine 7 is powered on to start welding.

[0032] See also Figure 5As shown, the present embodiment also provides a method for assembling and connecting accessories in a super-long barrel section box, including: step S1, cleaning the inner and outer surfaces of the super-long barrel section to be welded area with a grinding brush, opening the gripper of the accessory assembly and connection equipment in the super-long barrel section box, hoisting the barrel section from the side and placing it into the inner side of the limit block on the tooling bottom support, and after the barrel section has landed stably, ensuring that the gripper is closed and fits the outer surface of the barrel section; step S2, after the barrel section is raised to a certain distance by the lifting component 11 of the accessory assembly and connection equipment in the super-long barrel section box, it is smoothly moved along the ground track to the upper end of the welding machine, and then dropped to the accessory spot welding area; step S3, driving the barrel section to move in the height direction and rotate in the angular azimuth by the lifting component 11 and the rotating component, when the accessory to be welded area moves to the vicinity of the inner and outer electrodes, the operator holds the accessory and fixes it in the welding area of ​​the inner wall of the barrel section, so that the accessory welding point is pressed and fit with the end surface of the inner electrode; step S4, driving the moving side electrode to 5~20mm from the outer surface of the barrel section, and welding is energized; welding is energized from top to bottom in sequence Connect the single-side accessories of the barrel section, which include all accessories in the middle and lower ends of the barrel section; the single-side accessories of the barrel section include annular anti-sway frame accessories and bracket accessories; step S5, after the spot welding on one side of the barrel section is completed, the barrel section is raised to a certain distance by the lifting assembly 11, and then the spot welding system is moved horizontally to separate the barrel section from the base, and the base is lowered to the ground height along the guide rail, and the workpiece is rotated 180°; step S6, before flipping, the side plates supporting the end faces of the barrel section are in a tightened state, and the grippers on both sides are in a closed and clamped state, so as to ensure that the barrel section is firm and free of collision and falling risks during the flipping process; step S7, after the workpiece is rotated 180°, repeat steps S1-S6 to assemble and weld the accessories on the other side of the barrel section, and after welding, the welding deformation area of ​​the accessories is corrected by hammering, and the copper traces on the surface of the weld are cleaned by grinding with a wire brush; the accessory assembly and connection equipment in the box of the super-long barrel section involved in steps S1-S7 is the accessory assembly and connection equipment in the box of the super-long barrel section described in any one of claims 1-7.

[0033] In the embodiment, the cylinder with a diameter of Φ3350mm and a height of 6000mm needs to be slowly raised to 4m (the height of the welding machine electrode is 3.5m at this time), and then moved toward the vertical large deep throat spot welding system at a speed of 300~500mm / min along the ground track. When the center of the cylinder coincides with the fixed side electrode base (located on the same axis), stop the translation. After checking and confirming that the moving side electrode is in the maximum open state, the cylinder slowly descends, and stops descending when the accessories in the middle area of ​​the inner wall of the cylinder are at the same height as the electrode. During the movement, the operator needs to check whether there is interference and collision between the cylinder and the vertical large deep throat spot welding system. If so, the cylinder posture needs to be adjusted in time to ensure the safety of the cylinder.

[0034] Specifically, in this embodiment, in step S4, the welding steps for annular anti-sway frame accessories and bracket accessories include: step S401, when welding annular anti-sway frame accessories, first position the welds and then perform overall welding; the positioning sequence is from the middle of the accessory to both ends, and the spacing between the positioning welds is 200~300mm. After the positioning is completed, other welds are formally welded in sequence according to the requirement of 30mm spacing between welds; during the welding process, every 10~15 welds are welded, the inner and outer electrode end surfaces are polished once with 800 mesh sandpaper; step S402, when welding bracket accessories, the number of designed welds is two, the spacing between welds is 25mm, and after the first weld is welded normally, the second weld needs to increase the current by 2~3KA before welding.

[0035] like Figure 6-7 As shown, Figure 5 The attachment number is 13. Figure 6 In the figure, the longitudinal seam of the cylinder 15, the bracket accessories 16, the annular anti-sway frame accessories 17, the gray dots represent the positioning welding points, the black dots represent the formal welding points, and ①~⑦ represent the welding sequence.

[0036] The annular anti-sway frame accessories are a kind of long welded parts that are not closed. Generally, the welding points are divided into positioning welding points and formal welding points. The positioning order is to position from the middle of the accessories to both ends, and the spacing between positioning welding points is 200~300mm. For the parts with large assembly gaps, turn off the welding current, use the electrode pressure to correct them, and increase the positioning welding points. After the positioning is completed, according to the requirement of 30mm spacing between welding points, formally weld the other welding points in turn. During the welding process, use 800-mesh sandpaper to grind the inner and outer electrode end surfaces once every 10~15 welding points.

[0037] The spot welding area of ​​bracket accessories is small, and the number of welding points is generally designed to be two, with a welding point spacing of 25mm. Due to the shunting phenomenon between welding points during the welding process, after the first welding point is welded normally, the second welding point needs to increase the current by 2~3KA to solve the problem of heat input attenuation.

[0038] The embodiment solves the problem of assembly and connection of accessories on the inner wall of super-long cylinder sections. Relying on the vertical large-throat spot welding system, a special tooling suitable for the assembly of accessories on the inner wall of super-long cylinder sections of 6m is designed. The lifting assembly adopts a symmetrical two-linked elevator to adjust the height of the workpiece, and the lifting process is smooth. The tooling base is installed on the slewing bearing, and the slewing bearing is driven by a servo motor combined with a reducer to drive the cylinder to rotate at any angle. Two sets of limit blocks are installed on the tooling base to ensure that the workpiece is in a round state. The ground guide rail is parallel to the electrode axis to ensure that the axis of the workpiece is coplanar with the axis of the electrode to achieve coaxial parallel movement. Through the functions of internal support, lifting, and rotation of the tooling, the vertical integrated assembly and welding of accessories on the inner wall of super-long cylinder sections is realized, and the weldable length on one side is more than 3m, which solves the problems of short throat depth and narrow coverage of traditional spot welding systems.

[0039] The assembly and connection method of accessories inside the super-long cylinder section box, combined with its corresponding equipment, has realized the high-quality resistance spot welding technology for the inner wall accessories of the 6m super-long cylinder, filling the gap in the application of vertical resistance spot welding technology for super-long cylinder sections in China.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An equipment for assembling and connecting accessories in a super-long cylinder section box, characterized in that: The invention comprises a barrel section support frame (8) for supporting the barrel section (3), on which a lifting assembly (11), a rotating assembly, a slewing bearing (12) and a ground horizontal moving device are arranged, wherein the lifting assembly (11) is used for the barrel section (3) to move in the height direction, the rotating assembly is used for the barrel section (3) to rotate, the lower part of the barrel section support frame (8) is connected to a horizontal moving device for the barrel section (3) to move horizontally as a whole along a ground track (1), the slewing bearing (12) is used for supporting the barrel section (3) and realizing rotation at any angle, the slewing bearing (12) is powered by a servo motor combined with a speed reducer, and a tooling base (14) is arranged on the tooling base (14), and a plurality of limit blocks (4) are evenly distributed on the tooling base (14); a vertical large deep throat spot welding system, which is used for For spot welding accessories inside a barrel section (3), the vertical large deep throat spot welding system comprises a welding machine (7), a fixed side electrode base and a movable side electrode base, the welding machine (7) is provided with an inner electrode (702) and an outer electrode (701), the inner electrode (702) is a fixed side electrode, the outer electrode (701) is a movable side electrode, the axes of the inner electrode (702) and the outer electrode (701) form an electrode axis, the electrode axis is coplanar with the axis of the barrel section (3), the ground track (1) is parallel to the electrode axis, when assembling accessories inside the barrel section (3), the outer electrode (701) is placed outside the barrel section (3), the inner electrode (702) is placed inside the barrel section (3), and the vertical large deep throat spot welding system is arranged on one side of the barrel section support frame (8).

2. The ultra-long cylinder section box internal accessory assembly and connection equipment according to claim 1 is characterized in that: A lifting assembly (11) is arranged inside the barrel section support frame (8), the lifting assembly (11) is connected to the rotating assembly and the slewing bearing (12), and the lifting assembly (11) is a symmetrically installed two-linkage lifting machine transmission; the rotating motor (2) of the rotating assembly is connected to the gripper fixing frame, the gripper (5) is arranged on the gripper fixing frame, the gripper (5) fixes the side surface of the barrel section (3), and the arc of the contact between the gripper (5) and the outer surface of the barrel section (3) is adapted; the gripper fixing frame is connected to the fixing frame (6), the upper and lower ends of the fixing frame (6) are fixed with the supporting side plates (9), the H-shaped fixing plates (10) are bolted to the ends of the supporting side plates (9) and the fixing frame (6), and the supporting side plates (9) fix the upper and lower end surfaces of the barrel section (3); the barrel section support frame (8) is arranged on the left and right sides of the barrel section (3).

3. The ultra-long cylinder section box internal accessory assembly and connection equipment according to claim 1 is characterized in that: A through hole is provided on the tool base (14), and a connecting portion of an inner electrode (702) of the welding machine (7) passes through the through hole.

4. The ultra-long cylinder section box internal accessory assembly and connection equipment according to claim 1 is characterized in that: The limit block (4) is a groove-shaped structure, the inner wall of the limit block (4) is an equal-diameter arc surface, the limit block (4) supports the bottom surface of the barrel section (3), and the length of the barrel section (3) is 4-6m.

5. The ultra-long cylinder section box internal accessory assembly and connection equipment according to claim 2 is characterized in that: When the barrel section (3) is lifted to a certain distance by the lifting assembly (11), the horizontal moving device drives the barrel section support frame (8) to move at a certain speed along the ground track (1) toward the side of the vertical deep throat spot welding system. When the center of the barrel section (3) coincides with the fixed side electrode base of the vertical deep throat spot welding system, the motor in the horizontal moving device stops driving.

6. The ultra-long cylinder section box internal accessory assembly and connection equipment according to claim 2, characterized in that: When the movable side electrode is in the maximum open state, the lifting component (11) lowers the barrel section (3) until the attachment in the middle area of ​​the inner wall of the barrel section (3) and the electrode are at the same height, and the motor in the lifting component (11) stops driving.

7. The ultra-long cylinder section box internal accessory assembly and connection equipment according to claim 1 is characterized in that: When the end face of the inner electrode (702) is in contact with the inner wall of the barrel section (3), the outer electrode (701) of the vertical deep throat spot welding system is moved to a position 5 to 20 mm from the outer surface of the barrel section, and the welding machine (7) is powered on to start welding.

8. A method for assembling and connecting accessories in a super-long cylinder section box, characterized in that: The method comprises the following steps: step S1, cleaning the inner and outer surfaces of the area to be welded of the super-long barrel section with a grinding brush, opening the gripper of the accessory assembly connection equipment in the super-long barrel section box, lifting the barrel section from the side and placing it inside the limit block on the tooling bottom support, and ensuring that the gripper is closed and fits the outer surface of the barrel section after the barrel section falls stably; Step S2, after the cylinder section is raised to a certain distance by the lifting assembly (11) of the accessory assembly connection equipment in the super-long cylinder section box, it is smoothly moved along the ground track to the upper end of the welding machine and then lowered to the accessory spot welding area; Step S3, driving the barrel section to move in the height direction and rotate in the angular direction by means of the lifting assembly (11) and the rotating assembly, and when the area to be welded of the accessory moves to the vicinity of the inner and outer electrodes, the operator holds the accessory and fixes it to the welding area of ​​the inner wall of the barrel section, so that the welding point of the accessory is pressed and fitted tightly against the end surface of the inner electrode; Step S4, driving the moving side electrode to a position 5 to 20 mm from the outer surface of the barrel section, and applying electricity for welding; applying electricity to weld the single-side accessories of the barrel section in sequence from top to bottom, wherein the single-side accessories of the barrel section include all accessories in the middle and lower ends of the barrel section; the single-side accessories of the barrel section include an annular anti-sway frame type accessories and a bracket type accessories; Step S5, after the spot welding of one side of the barrel section is completed, the barrel section is raised to a certain distance by the lifting assembly (11), and then horizontally moved out of the spot welding system, the barrel section is separated from the base, and the base is lowered to the ground level along the guide rail, and the workpiece is rotated 180°; Step S6: Before flipping, the side plates supporting the end faces of the barrel section are tightened, and the grippers on both sides are closed and held tightly, ensuring that the barrel section is firm and free of risk of collision or falling during the flipping process; Step S7, after the workpiece is rotated 180°, steps S1-S6 are repeated to perform assembly welding of the accessories on the other side of the barrel section, and after welding, the welding deformation area of ​​the accessories is corrected by hammering, and the copper traces on the surface of the welding point are cleaned by grinding with a wire brush; The extra-long cylinder section box interior accessory assembly and connection equipment involved in the steps S1-S7 is the extra-long cylinder section box interior accessory assembly and connection equipment as described in any one of claims 1-7.

9. The method for connecting accessories in a super-long cylinder section box according to claim 8, characterized in that: In step S4, the welding steps for annular anti-sway frame accessories and bracket accessories include: step S401, when welding annular anti-sway frame accessories, first position the welds and then perform overall welding; the positioning order is from the middle of the accessory to both ends, and the spacing between the positioning welds is 200~300mm. After the positioning is completed, the other welds are formally welded in sequence according to the requirement of 30mm spacing between welds; during the welding process, every 10~15 welds are welded, the inner and outer electrode end surfaces are polished once with 800 mesh sandpaper; step S402, when welding bracket accessories, the number of designed welds is two, the spacing between welds is 25mm, and after the first weld is welded normally, the second weld needs to increase the current by 2~3KA before welding.

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