A method and equipment for assembling and connecting internal accessories of an ultra-long cylindrical box.

Abstract

This invention provides an assembly and connection device for internal accessories of an ultra-long cylindrical section, comprising: a cylindrical section support frame for supporting the cylindrical section, which is equipped with a lifting component, a rotating component, a slewing bearing, and a ground horizontal movement device; the lifting component for vertical movement of the cylindrical section, the rotating component for rotation of the cylindrical section, and a ground track connected to the lower part of the cylindrical section support frame for overall horizontal movement of the cylindrical section; and a vertical deep throat spot welding system for spot welding internal accessories of the cylindrical section, which includes a welding machine and is located on one side of the cylindrical section support frame. This invention also relates to an assembly and connection method for internal accessories of an ultra-long cylindrical section based on the aforementioned assembly and connection device. The assembly and connection method and equipment for internal accessories of an ultra-long cylindrical section described in this invention achieves the assembly and welding of internal accessories of ultra-long cylindrical sections, solving the problems of short throat depth and narrow coverage of traditional spot welding systems.

Description

Technical Field

[0001] This invention belongs to the field of welding and assembly, and particularly relates to a method and equipment for assembling and connecting internal accessories of an ultra-long cylindrical box. Background Technology

[0002] The principle of resistance spot welding technology is to assemble the workpieces to be welded and place them 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 workpieces. Then, the current is applied in segments to increase the pressure. The resistance heat generated by the current melts the metal of the workpieces, thereby forming a weld nugget and achieving an effective connection.

[0003] Propellant tanks, as key components of the launch vehicle's propulsion and structural systems, play a crucial role in force transmission, shape maintenance, and propellant storage and delivery. They are typically assembled from a front bottom, a front short shell, a cylindrical section, a rear bottom, and a rear short shell, all welded together. Previously, propellant tank cylindrical sections were designed to be relatively short, only 1.0~2.2m in length. This resulted in a large number of tank sections, numerous longitudinal and circumferential seams, high labor intensity for operators, and high manufacturing costs, making them unsuitable for future mass production needs.

[0004] Currently, each section of the propellant tank is designed with annular anti-sway frames and supports on its inner wall, all of which need to be connected to the section using resistance spot welding technology. Existing processes can only meet the assembly and welding requirements of the section accessories in a horizontal position, with a maximum weldable length of 1.2m on one side. However, with the breakthrough in the one-piece molding manufacturing process for 4-6m sections, the existing process cannot meet the assembly and connection requirements of the inner wall accessories for ultra-long 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 cylindrical section, in order to solve the problem that existing processes can only meet the assembly and welding of cylindrical section accessories in a horizontal state, and the maximum weldable length on one side is relatively short, which cannot meet the assembly and connection requirements of accessories inside ultra-long cylindrical sections.

[0006] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0007] This invention provides an assembly and connection device for internal accessories of an ultra-long cylindrical section, comprising a cylindrical section support frame for supporting the cylindrical section, and a lifting assembly, a rotating assembly, a slewing bearing, and a ground horizontal movement device. The lifting assembly is used for vertical movement of the cylindrical section, the rotating assembly is used for rotation of the cylindrical section, the horizontal movement device is connected to the lower part of the cylindrical section support frame for horizontal movement of the cylindrical section along a ground track, and the slewing bearing is used to support the cylindrical section and achieve rotation at any angle. The slewing bearing is powered by a servo motor combined with a reduction gear, and a tooling base is provided on it. Several tools are evenly distributed on the tooling base. Dry limiting block; Vertical deep throat spot welding system, used for spot welding of internal accessories of cylinder section, the vertical deep throat spot welding system includes 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 and 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 cylinder section axis, the ground track is parallel to the electrode axis, when assembling internal accessories of cylinder section, the outer electrode is placed outside the cylinder section and the inner electrode is placed inside the cylinder section, the vertical deep throat spot welding system is located on one side of the cylinder section support frame.

[0008] Furthermore, the lifting assembly is located inside the cylindrical section support frame, and is connected to the rotating assembly and the slewing bearing. The lifting assembly is a symmetrically installed two-linkage lifting transmission. The rotating motor of the rotating assembly is connected to the gripper fixing frame, and the gripper is located on the gripper fixing frame. The gripper is fixed to the side of the cylindrical section, and the arc of the contact point between the gripper and the outer surface of the cylindrical section is adapted. The gripper fixing frame is internally connected to a fixing frame, and the upper and lower ends of the fixing frame are fixed to the support side plates. The H-shaped fixing plate is locked to the end of the support side plate fixing frame by bolts, and the support side plate is fixed to the upper and lower end faces of the cylindrical section. The cylindrical section support frame is located on the left and right sides of the cylindrical section.

[0009] Furthermore, the tooling base is provided with a through hole through which the internal electrode connection part of the welding machine passes.

[0010] Furthermore, the limiting block has a groove-shaped structure, the inner wall of the limiting block is an arc surface of equal diameter, the limiting block supports the bottom surface of the cylindrical section, and the length of the cylindrical section is 4-6m.

[0011] Furthermore, after the cylinder segment is raised to a certain distance by the lifting assembly, the horizontal moving device drives the cylinder segment support frame to move along the ground track at a certain speed toward the vertical deep throat spot welding system. When the center of the cylinder segment coincides with the fixed side electrode base of the vertical deep throat spot welding system, the motor inside the horizontal moving device stops driving.

[0012] Furthermore, when the movable side electrode is in the maximum open state, the lifting assembly lowers the cylinder section to the same height as the attachment and electrode in the middle area of ​​the inner wall of the cylinder section, and then the motor inside the lifting assembly stops driving.

[0013] Furthermore, when the inner electrode end face is in contact with the inner wall of the cylinder section, the outer electrode of the vertical deep throat spot welding system is 5-20mm from the outer surface of the cylinder section, and the welding machine is powered on to start the welding action.

[0014] This invention also provides a method for assembling and connecting accessories inside an ultra-long cylindrical section box, comprising: Step S1, cleaning the inner and outer surfaces of the ultra-long cylindrical section to be welded area with a grinding brush, opening the gripper of the ultra-long cylindrical section box accessory assembly and connection equipment, lifting the cylindrical section from the side and placing it inside the limiting block on the tool base, ensuring that the gripper is closed and in contact with the outer surface of the cylindrical section after the cylindrical section has landed stably; Step S2, raising the cylindrical section to a certain distance using the lifting component of the ultra-long cylindrical section box accessory assembly and connection equipment, moving it smoothly along the ground track to the upper end of the welding machine, and then lowering it to the accessory spot welding area; Step S3, using the lifting component and the rotating component to drive the cylindrical section to move along the height direction and rotate in the angular direction, 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 to the welding area on the inner wall of the cylindrical section, so that the accessory welding point is pressed tightly against the inner electrode end face; Step S4, driving the moving side electrode to 5~20mm from the outer surface of the cylindrical section, and energizing for welding; energizing and welding the cylindrical section accessories on one side sequentially from top to bottom. The single-sided accessories of the cylindrical section include all accessories in the middle and lower end of the cylindrical section; the single-sided accessories of the cylindrical section include ring-shaped anti-sway frame accessories and bracket accessories; Step S5, after the spot welding of one side of the cylindrical section is completed, the cylindrical section is raised to a certain distance by the lifting component, and then moved out of the spot welding system to separate the cylindrical section from the base. The base is lowered to the ground height along the guide rail, and the workpiece is rotated 180°; Step S6, before flipping, the support side plates on both ends of the cylindrical section are in a tightened state, and the grippers on both sides are in a closed and tight state. During the flipping process, it is ensured that the cylindrical section is firm and there is no risk of bumping or falling; Step S7, after the workpiece is rotated 180°, the steps S1-S6 are repeated to assemble and weld the accessories on the other side of the cylindrical section. After welding, the weld deformation area of ​​the accessories is corrected by hammering, and the copper traces on the surface of the weld point are cleaned by grinding with a wire brush; The ultra-long cylindrical section box accessory assembly and connection equipment involved in steps S1-S7 is the ultra-long cylindrical section box accessory assembly and connection equipment as described in any one of claims 1-7.

[0015] Furthermore, in step S4, the welding steps for the annular anti-sway frame type accessories and bracket type accessories include: Step S401, when welding the annular anti-sway frame type accessories, first perform positioning welds, and then perform overall welding; the positioning sequence is from the middle of the accessory to both ends, and the positioning weld spacing is 200~300mm. After positioning, according to the requirement of 30mm weld spacing, the other welds are welded in sequence; during the welding process, every 10~15 welds are welded, the inner and outer electrode end faces are polished once with 800-grit sandpaper; Step S402, when welding the bracket type accessories, the designed number of welds is two, the weld spacing is 25mm, and after the first weld is welded normally, the second weld needs to increase the current by 2~3KA before welding.

[0016] Compared with existing technologies, the assembly and connection method and equipment for the internal accessories of the ultra-long cylindrical section box described in this invention have the following advantages:

[0017] (1) The assembly and connection method of the inner accessories of the ultra-long cylindrical section box of the present invention, combined with its corresponding equipment, realizes the high-quality resistance spot welding technology of the inner wall accessories of the 6m ultra-long cylindrical section, filling the gap in the application of vertical resistance spot welding technology of ultra-long cylindrical section in China.

[0018] (2) This invention solves the problem of assembling and connecting accessories on the inner wall of ultra-long cylindrical sections. Based on a vertical deep throat spot welding system, a special tooling for assembling accessories on the inner wall of 6m ultra-long cylindrical sections was designed. The lifting assembly uses a symmetrical two-linkage lifting machine to adjust the workpiece height, and the lifting process is smooth. The tooling base is installed on a slewing bearing, which is driven by a servo motor combined with a reducer to rotate the cylinder at any angle. Two sets of limit blocks are installed on the tooling base to ensure that the workpiece is in a rounded state. The ground guide rail is parallel to the electrode axis to ensure that the workpiece axis is coplanar with the electrode axis and achieves coaxial parallel movement. Through the tooling's internal support, lifting, and rotation functions, vertical integrated assembly and welding of accessories on the inner wall of ultra-long cylindrical sections is realized. The weldable length on one side is more than 3m, solving the problems of short throat depth and narrow coverage of traditional spot welding systems. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] In the attached diagram:

[0021] Figure 1 This is an overall isometric view of the assembly and connection equipment for the internal accessories of the ultra-long cylindrical section box according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic front view of the overall assembly and connection equipment for the internal accessories of the ultra-long cylindrical section box according to an embodiment of the present invention;

[0023] Figure 3 This is schematic diagram AA in the overall main view of the assembly and connection equipment for the internal accessories of the ultra-long cylindrical section box according to an embodiment of the present invention;

[0024] Figure 4 This is a side view of the overall assembly and connection equipment for the internal accessories of the ultra-long cylindrical section box according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the assembly and connection method of the internal accessories of the ultra-long cylindrical section box according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the electrode position during welding of accessories in the assembly and connection method of the ultra-long cylindrical section box described in this embodiment of the invention;

[0027] Figure 7 This is a schematic diagram of the welding sequence when welding accessories in the assembly and connection method of the ultra-long cylindrical box described in the embodiment of the present invention.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Ground track; 2. Rotary motor; 3. Segment; 4. Limit block; 5. Grab; 6. Fixture; 7. Welding machine; 8. Segment support frame; 9. Support side plate; 10. H-shaped fixing plate; 11. Lifting assembly; 12. Slewing bearing; 13. Accessories; 14. Tooling base; 15. Segment longitudinal seam; 16. Support accessories; 17. Annular anti-sway frame accessories; 701. External electrode; 702. Internal electrode. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] See Figure 1-4 As shown, this embodiment provides an assembly and connection device for accessories inside an ultra-long cylindrical section box, including a cylindrical section support frame 8 for supporting the cylindrical section 3. The support frame 8 is equipped with a lifting assembly 11, a rotating assembly, a slewing bearing 12, and a ground horizontal movement device. The lifting assembly 11 is used for vertical movement of the cylindrical section 3, the rotating assembly is used for rotation of the cylindrical section 3, and the horizontal movement device is connected to the lower part of the support frame 8 for horizontal movement of the cylindrical section 3 along the ground track 1. The slewing bearing 12 supports the cylindrical section 3 and allows for rotation at any angle. The slewing bearing 12 is powered by a servo motor combined with a reduction gear. Several limiting blocks are evenly distributed on the tooling base 14. 4; Vertical deep throat spot welding system, which is used to spot weld the internal accessories of cylinder section 3. The vertical deep throat spot welding system includes a welding machine 7, a fixed side electrode base and a movable side electrode base. The welding machine 7 is equipped 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 cylinder section 3. The ground track 1 is parallel to the electrode axis. When assembling the internal accessories of cylinder section 3, the outer electrode 701 is placed outside cylinder section 3 and the inner electrode 702 is placed inside cylinder section 3. The vertical deep throat spot welding system is located on one side of the cylinder section support frame 8.

[0035] In this embodiment, the limiting blocks are divided into two groups of six, which are compatible with both Φ2250mm and Φ3350mm cylinders. When changing cylinder sections of different diameters, there is no need to change the drive system; they can be used directly. The limiting blocks have a groove-shaped structure with an inner wall of equal diameter arc surface, which ensures that the cylinder section can fall smoothly into the limiting blocks even in the event of local deformation.

[0036] Specifically, in this embodiment, the lifting assembly 11 is located inside the cylindrical section support frame 8. The lifting assembly 11 is connected to the rotating assembly and the slewing bearing 12. The lifting assembly 11 is a symmetrically installed two-linkage lifting transmission. The rotating motor 2 of the rotating assembly is connected to the gripper fixing frame. The gripper 5 is located on the gripper fixing frame and fixes the side of the cylindrical section 3. The contact arc between the gripper 5 and the outer surface of the cylindrical section 3 is adapted. The gripper fixing frame is connected to the fixing frame 6 inside. The upper and lower ends of the fixing frame 6 are fixed with the support side plates 9. The H-shaped fixing plate 10 is locked to the end of the support side plate 9 and the fixing frame 6 by bolts. The support side plate 9 fixes the upper and lower end faces of the cylindrical section 3. The cylindrical section support frame 8 is located on the left and right sides of the cylindrical section 3.

[0037] Specifically, in this embodiment, the tooling base 14 is provided with a through hole, through which the inner electrode 702 of the welding machine 7 passes.

[0038] Specifically, in this embodiment, the limiting block 4 has a groove-shaped structure, the inner wall of the limiting block 4 is an arc surface of equal diameter, the limiting block 4 supports the bottom surface of the cylindrical section 3, and the length of the cylindrical section 3 is 4-6m.

[0039] Specifically, in this embodiment, after the cylinder segment 3 is raised to a certain distance by the lifting assembly 11, the horizontal moving device drives the cylinder segment support frame 8 to move along the ground track 1 towards the vertical deep throat spot welding system at a certain speed. When the center of the cylinder segment 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.

[0040] Specifically, in this embodiment, when the movable side electrode is in the maximum open state, the lifting assembly 11 lowers the cylinder section 3 to the same height as the attachment and electrode in the middle area of ​​the inner wall of the cylinder section 3, and then the motor inside the lifting assembly 11 stops driving.

[0041] Specifically, in this embodiment, when the end face of the inner electrode 702 is in contact with the inner wall of the cylinder section 3, the outer electrode 701 of the vertical deep throat spot welding system is 5-20mm from the outer surface of the cylinder section, and the welding machine 7 is powered on to start the welding action.

[0042] See Figure 5As shown, this embodiment also provides a method for assembling and connecting accessories inside an ultra-long cylindrical section box, including: Step S1, cleaning the inner and outer surfaces of the ultra-long cylindrical section to be welded area with a grinding brush, opening the gripper of the ultra-long cylindrical section box accessory assembly and connection equipment, lifting the cylindrical section from the side and placing it inside the limiting block on the tool base, ensuring that the gripper is closed and in contact with the outer surface of the cylindrical section after the cylindrical section has landed stably; Step S2, raising the cylindrical section to a certain distance using the lifting component 11 of the ultra-long cylindrical section box accessory assembly and connection equipment, moving it smoothly along the ground track to the upper end of the welding machine, and then lowering it to the accessory spot welding area; Step S3, using the lifting component 11 and the rotating component to drive the cylindrical section to move along the height direction and rotate in the angular direction, 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 to the welding area on the inner wall of the cylindrical section, so that the accessory welding point is pressed tightly against the inner electrode end face; Step S4, driving the moving side electrode to 5~20mm from the outer surface of the cylindrical section, and energizing for welding; energizing for welding from top to bottom sequentially. The attachments on one side of the cylindrical section include all attachments in the middle and lower part of the cylindrical section; the attachments on one side of the cylindrical section include ring-shaped anti-sway frame attachments and bracket attachments; Step S5, after the spot welding on one side of the cylindrical section is completed, the cylindrical section is raised to a certain distance by the lifting component 11, and then moved out of the spot welding system to separate the cylindrical section from the base. The base is lowered to the ground height along the guide rail, and the workpiece is rotated 180°; Step S6, before flipping, the support side plates on both ends of the cylindrical section are in a tightened state, and the grippers on both sides are in a closed and tight state. During the flipping process, it is ensured that the cylindrical section is firm and there is no risk of bumping or falling; Step S7, after the workpiece is rotated 180°, the steps S1-S6 are repeated to assemble and weld the attachments on the other side of the cylindrical section. After welding, the deformed area of ​​the attachment welding is corrected by hammering, and the copper traces on the surface of the weld point are cleaned by grinding with a wire brush; The ultra-long cylindrical section box internal attachment assembly and connection equipment involved in steps S1-S7 is the ultra-long cylindrical section box internal attachment assembly and connection equipment as described in any one of claims 1-7.

[0043] In this embodiment, the cylinder with a diameter of Φ3350mm and a height of 6000mm needs to be slowly raised to 4m (at which point the welding electrode height is 3.5m). It is then moved along the ground track at a speed of 300-500mm / min towards the vertical deep throat spot welding system. The movement stops when the center of the cylinder coincides with the fixed-side electrode base (located on the same axis). After confirming that the moving-side electrode is in its maximum open state, the cylinder is slowly lowered. The descent stops when the attachments in the middle area of ​​the cylinder's inner wall are at the same height as the electrode. During the movement, the operator must check for any interference or collision between the cylinder and the vertical deep throat spot welding system. If any issues are found, the cylinder's position must be adjusted promptly to ensure its safety.

[0044] Specifically, in this embodiment, in step S4, the welding steps for the annular anti-sway frame type accessories and the bracket type accessories include: Step S401, when welding the annular anti-sway frame type accessories, first perform positioning welds, and then perform overall welding; the positioning sequence is from the middle of the accessory to both ends, and the positioning weld spacing is 200~300mm. After positioning, according to the requirement of a weld spacing of 30mm, the other welds are welded in sequence; during the welding process, every 10~15 welds are welded, the inner and outer electrode end faces are polished once with 800-grit sandpaper; Step S402, when welding the bracket type accessories, the designed number of welds is two, the weld spacing is 25mm, and after the first weld is welded normally, the second weld needs to increase the current by 2~3KA before welding.

[0045] like Figure 6-7 As shown, Figure 5 The appendix number is 13. Figure 6 In the middle, the longitudinal seam of the cylinder 15, the support accessories 16, and the annular anti-sway frame accessories 17 are represented by gray dots as positioning welds and black dots as formal welds. ①~⑦ indicate the assembly and welding sequence.

[0046] Ring-shaped anti-sway frames are non-enclosed long welded parts. Generally, the welding points are divided into locating welds and final welds. The locating sequence is from the middle of the accessory outwards, with a spacing of 200-300mm between locating welds. For areas with large assembly gaps, the welding current is turned off, and electrode pressure is used to correct the shape, adding locating welds. After locating, the remaining welds are then welded sequentially according to a 30mm spacing requirement. During the welding process, every 10-15 welds, the inner and outer electrode surfaces are polished with 800-grit sandpaper.

[0047] The spot welding area of ​​bracket accessories is narrow, and the number of welding points is generally designed to be two, with a spacing of 25mm between the welding points. Due to the current shunting phenomenon between the 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.

[0048] This embodiment solves the problem of assembling and connecting inner wall accessories in ultra-long cylindrical sections. Based on a vertical deep throat spot welding system, a special tooling for assembling inner wall accessories in 6m ultra-long cylindrical sections was designed. The lifting assembly uses a symmetrical two-linkage lifting machine to achieve workpiece height adjustment, and the lifting process is smooth. The tooling base is mounted on a slewing bearing, which is driven by a servo motor and reducer to rotate the cylinder at any angle. Two sets of limit blocks are installed on the tooling base to ensure that the workpiece is in a rounded state. The ground guide rail is parallel to the electrode axis, ensuring that the workpiece axis and the electrode axis are coplanar and achieving coaxial parallel movement. Through the tooling's internal support, lifting, and rotation functions, vertical integrated assembly and welding of inner wall accessories in ultra-long cylindrical sections is achieved, with a single-side weldable length of over 3m, solving the problems of short throat depth and narrow coverage area of ​​traditional spot welding systems.

[0049] The assembly and connection method of internal accessories for ultra-long cylindrical sections, combined with their corresponding equipment, has realized high-quality resistance spot welding technology for internal wall accessories of 6m ultra-long cylindrical sections, filling the gap in the application of vertical resistance spot welding technology for ultra-long cylindrical sections in China.

[0050] 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 principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An assembly and connection device for internal accessories of an ultra-long cylindrical box, characterized in that, Includes a cylindrical section support frame (8) for supporting the cylindrical section (3), which is equipped with a lifting assembly (11), a rotating assembly, a slewing bearing (12), and a ground horizontal movement device. The lifting assembly (11) is used for the vertical movement of the cylindrical section (3), the rotating assembly is used for the rotation of the cylindrical section (3), the horizontal movement device is connected to the lower part of the cylindrical section support frame (8) for the overall horizontal movement of the cylindrical section (3) along the ground track (1), the slewing bearing (12) is used to support the cylindrical section (3) and achieve rotation at any angle, the slewing bearing (12) is powered by a servo motor combined with a reduction gear, and is equipped with a tooling base (14), on which several limiting blocks (4) are evenly distributed; a vertical deep throat spot welding system, which is used for For spot welding of internal accessories in cylinder section (3), the vertical deep throat spot welding system includes 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 cylinder section (3). The ground track (1) is parallel to the electrode axis. When assembling internal accessories in cylinder section (3), the outer electrode (701) is placed outside cylinder section (3) and the inner electrode (702) is placed inside cylinder section (3). The vertical deep throat spot welding system is located on one side of the cylinder section support frame (8). The lifting assembly (11) is located inside the cylindrical section support frame (8). The lifting assembly (11) is connected to the rotating assembly and the slewing bearing (12). 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 located on the gripper fixing frame. The gripper (5) fixes the side of the cylindrical section (3). The contact arc between the gripper (5) and the outer surface of the cylindrical section (3) is adapted. The gripper fixing frame is connected to the fixing frame (6) inside. The fixing frame (6) fixes the support side plate (9) at both ends. The H-shaped fixing plate (10) is locked to the end of the support side plate (9) fixing frame (6) by bolts. The support side plate (9) fixes the upper and lower end faces of the cylindrical section (3). The cylindrical section support frame (8) is located on the left and right sides of the cylindrical section (3).

2. The assembly and connection equipment for internal accessories of the ultra-long cylindrical section box according to claim 1, characterized in that, The tooling base (14) is provided with a through hole, through which the inner electrode (702) of the welding machine (7) passes.

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

4. The assembly and connection equipment for internal accessories of the ultra-long cylindrical section box according to claim 1, characterized in that, When the cylinder section (3) is raised to a certain distance by the lifting assembly (11), the horizontal moving device drives the cylinder section support frame (8) to move along the ground track (1) towards the vertical deep throat spot welding system at a certain speed. When the center of the cylinder 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.

5. The assembly and connection equipment for internal accessories of the ultra-long cylindrical section box according to claim 1, characterized in that, When the movable side electrode is in the maximum open state, the lifting assembly (11) lowers the cylinder section (3) to the same height as the attachment and electrode in the middle area of ​​the inner wall of the cylinder section (3), and the motor inside the lifting assembly (11) stops driving.

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

7. A method for assembling and connecting internal accessories of an ultra-long cylindrical box, characterized in that, The steps include: S1, cleaning the inner and outer surfaces of the welding area of ​​the extra-long cylindrical section with a grinding brush, opening the gripper of the accessory assembly and connection equipment inside the extra-long cylindrical section box, lifting the cylindrical section from the side and placing it inside the limiting block on the tooling base, and ensuring that the gripper closes and fits against the outer surface of the cylindrical section after the cylindrical section is lowered and stabilized. Step S2: After the cylindrical section is raised to a certain distance by the lifting assembly (11) of the attachment assembly and connection equipment inside the long cylindrical section box, it is moved smoothly along the ground track to the upper end of the welding machine and then lowered to the attachment spot welding area. Step S3: The cylinder section is moved along the height direction and rotated in the angular direction by the lifting component (11) and the rotating component. When the attachment to be welded area moves to the vicinity of the inner and outer electrodes, the operator holds the attachment and fixes it in the welding area of ​​the inner wall of the cylinder section so that the welding point of the attachment is pressed tightly against the inner electrode end face. Step S4: Drive the moving side electrode to 5-20mm from the outer surface of the cylinder section and apply electricity for welding; apply electricity to weld the cylinder section accessories on one side sequentially from top to bottom. The cylinder section accessories on one side include all accessories in the middle and lower end of the cylinder section. The cylinder section accessories on one side include ring-shaped anti-sway frame accessories and bracket accessories. Step S5: After spot welding is completed on one side of the cylinder section, the cylinder section is raised to a certain distance by the lifting assembly (11), and then moved out of the spot welding system to separate the cylinder section from the base. The base is lowered to ground height along the guide rail and the workpiece is rotated 180°. Step S6: Before flipping, the side plates supporting both ends of the cylinder section are tightened and the two grippers are closed and held tightly. During the flipping process, ensure that the cylinder section is secure and free from the risk of bumping or falling. Step S7: After rotating the workpiece 180°, repeat steps S1-S6 to assemble and weld the accessories on the other side of the cylinder section. After welding, the deformed area of ​​the accessory welding is corrected by hammering, and the copper traces on the surface of the weld point are cleaned by grinding with a wire brush. The accessory assembly and connection equipment for the ultra-long cylinder section box involved in steps S1-S7 is the accessory assembly and connection equipment for the ultra-long cylinder section box as described in any one of claims 1-6.

8. The method for assembling and connecting internal accessories of an ultra-long cylindrical section box according to claim 7, 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 perform positioning welds, and then perform overall welding; the positioning sequence is from the middle of the accessory to both ends, with a positioning weld spacing of 200-300mm. After positioning, according to the requirement of a weld spacing of 30mm, the other welds are welded in sequence; during the welding process, after every 10-15 welds, the inner and outer electrode end faces are polished once with 800-grit sandpaper; Step S402, when welding bracket accessories, the designed number of welds is two, with a weld spacing of 25mm, and after the first weld is welded normally, the second weld needs to be welded with an increased current of 2-3KA.

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