A construction technology of erecting a frame body of a central court net shell operation platform

Abstract

This application relates to the field of nuclear power engineering construction technology, and discloses a frame erection construction process for an atrium reticulated shell operating platform. The process includes assembling a foundation support module, a central drive adjustment module, and connecting components, and adjusting the frame shape. The central drive adjustment module includes a third fixing ring fixed to the crossbar, a threaded rod, a guide rod, and a connecting plate. The connecting components include a first connecting component on a straight section and a second connecting component at the corner. During adjustment, rotating the threaded rod drives the connecting plate to move axially along the support rod, causing the horizontal members, which are in a semi-relaxed state, to adjust their vertical height to match the reticulated shell elevation. Simultaneously, the locking of the central pivot of the second connecting component is released, and the angle of the horizontal members is adjusted to fit the edge shape of the reticulated shell. After adjustment, all components are relocked. This invention achieves precise fitting of the operating platform to complex irregular curved reticulated shells through stepless height fine-tuning and adaptive angle adjustment, ensuring construction accuracy and structural safety.

Description

Technical Field

[0001] This invention relates to the field of nuclear power engineering construction technology, specifically to a construction process for the frame erection of a central atrium shell operating platform. Background Technology

[0002] In nuclear power plant construction, nuclear island buildings (such as reactor containment buildings and fuel buildings) typically contain numerous hyperboloid structures, dome structures, and complex internal corridors. In particular, the steel lining and concrete shell of the containment building are often combinations of cylinders and hemispheres in geometry, and the arrangement of internal embedded parts, through parts, and process piping is extremely dense, placing extremely high demands on the precision and safety of the construction work surface.

[0003] Currently, when performing high-altitude installation, welding, and corrosion protection work on such irregularly shaped structures at nuclear power plants, the main method used is to construct operating platforms using traditional coupler-type or disc-type steel pipe scaffolding. This universal scaffolding system employs standardized members and fixed modular step distances, and its structural logic is based on an orthogonal grid system. However, the boundaries of nuclear island building structures are continuously changing curved surfaces, and standardized rectangular frame units cannot geometrically perfectly fit the arc-shaped walls or spherical domes.

[0004] This situation leads to two main technical limitations in actual construction. Vertically, the installation welds and inspection points of nuclear power equipment are often located at non-elevation levels, while the scaffolding height is limited by the inherent spacing of the upright nodes. This results in the operating platform often being unable to accurately align with the working reference plane, forcing construction workers to work at non-ergonomic heights, affecting the welding quality and inspection efficiency of nuclear-grade welds. Horizontally, the straight horizontal bars and the curved structural walls inevitably create wedge-shaped gaps of varying widths. This not only violates the strict control requirements for Foreign Material Exclusion (FME) in nuclear power construction but also requires on-site workers to lay temporary planks or timber for sealing. These temporary remedial measures lack a unified rigid connection design, posing safety hazards such as structural instability or plank slippage when supporting heavy construction equipment or multiple workers working simultaneously, making it difficult to meet the stringent safety and quality standards of nuclear power engineering. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a construction process for the scaffolding of an atrium-shaped reticulated shell operating platform, which solves the problem that standard scaffolding is difficult to adapt to irregular edge angles and changes in vertical elevation when building an operating platform for an irregular curved reticulated shell structure.

[0006] The first aspect of this invention provides a construction process for the scaffolding erection of a central atrium shell operating platform, used for assembling a staggered, adaptive scaffolding. This construction process achieves the fitting of the scaffolding to complex curved surface boundaries through a combination of modular assembly and dynamic adjustment. The process specifically includes the following steps: Assembly steps for the basic support module: Erect multiple support rods at the construction site, and use the adjustment mechanism located at the bottom of the support rods to correct the verticality and horizontality of the support rods, thus establishing the vertical load-bearing benchmark for the frame.

[0007] Assembly steps for the central drive adjustment module: Fix the third fixing ring at a predetermined position in the middle of the crossbar connected to the upper end of the support rod, serving as the force-bearing base for the drive mechanism. Install a threaded rod and a guide rod parallel to the axis of the support rod on the third fixing ring. Movably sleeve the connecting plate on the outside of the support rod, establishing a mating connection between the connecting plate, the threaded rod, and the guide rod.

[0008] Assembly steps for connecting components: Install the first connecting component on the straight section of the support rod, and install the second connecting component at the corner of the support rod. Connect the transverse members through the first and second connecting components to form the horizontal bearing surface of the working layer.

[0009] Steps for adjusting the frame shape: Rotate the threaded rod to drive the connecting plate to move along the axis of the support rod, and use the connecting plate to drive the horizontal rod to adjust the vertical height to match the elevation of the grid shell structure; at the same time, adjust the angle of the second connecting component to adapt to the edge shape of the atrium grid shell.

[0010] Based on the above-mentioned process, the present invention further optimizes the structure and function through the following specific technical features: Regarding the adjustment of the base support, the adjustment mechanism consists of a connecting sleeve, a lead screw, and a fixing plate. The connecting sleeve is installed at the bottom end of the support rod, the lead screw is screwed into the connecting sleeve, and the fixing plate is installed at the bottom end of the lead screw. By rotating the lead screw, the axial distance between the fixing plate and the connecting sleeve is changed, thereby adjusting the length of a single support rod.

[0011] Regarding the specific structure of the central drive adjustment module, the third fixed ring has fastening bolts on its sidewall. By tightening the fastening bolts, the third fixed ring is locked to the middle of the crossbar, serving as a fixed base to bear vertical loads. The connecting plate has threaded holes and guide holes, which respectively mate with the threaded rod and the guide rod. Insertion blocks are installed at the ends of the threaded rod and the guide rod to limit the movement of the connecting plate and prevent it from coming loose.

[0012] Regarding the connection method of the straight segment, the first connecting component includes a first locking block, a second locking block, a first connecting block, and a second connecting block. The first locking block and the second locking block interlock and cover the outer wall of the support rod, and the first connecting block and the second connecting block interlock and cover the outer wall of the transverse member. The components are locked by inserting fixing screws, and the friction between the inner wall of the component and the outer wall of the tube is used to fix the transverse member and the support rod orthogonally.

[0013] Regarding the connection method at the corner, the second connection assembly includes an L-shaped connector, a limiting ring, a fixing rod, and a hinge structure. The L-shaped connector and the limiting ring are sleeved on the support rod, and the L-shaped connector is locked at a predetermined height on the support rod by tightening the fixing rod. The L-shaped connector is hinged to the first fixing ring via a pivot, and the first fixing ring and the second fixing ring cooperate to clamp the transverse rod, allowing the end of the transverse rod to deflect horizontally around the pivot.

[0014] Regarding the specific operation of angle adaptation, when adjusting the second connecting component, release the locking state of the rotating shaft, allowing the first fixing ring to gain rotational freedom relative to the L-shaped connector. Rotate the transverse rod to cause the first fixing ring to deflect until the axial direction of the transverse rod is parallel to the tangential direction of the edge of the atrium mesh shell. Then, relock the rotating shaft to eliminate the rotational freedom.

[0015] The specific operation for adjusting the vertical height involves first loosening the constraints, then driving the adjustment, and finally restoring the lock. Specifically, this includes: loosening the fasteners on the first or second connecting assembly, so that the transverse member is in a semi-relaxed state relative to the support rod, maintaining radial limitation but allowing axial sliding; driving the threaded rod to rotate, using the connecting disc to lift the semi-relaxed connecting assembly and move it synchronously to the design elevation; the connecting disc is fixedly connected to the connecting assembly via a connector; after the height adjustment is in place, tightening the fasteners on the connecting assembly again to restore the rigid friction lock between the node and the support rod.

[0016] The construction process provided by this invention, through the inclusion of a central drive adjustment module and a rotatable second connecting component, can adapt to the construction needs of complex curved reticulated shells. Fine-tuning of height is achieved using a threaded drive, and edge angle fitting is achieved using a hinged structure, ensuring the erection accuracy and stability of the irregular structure construction platform.

[0017] This invention provides a construction process for the frame erection of a central atrium shell operating platform, which has the following beneficial effects: This invention utilizes a central drive adjustment module, where the rotation of a threaded rod drives the connecting disc to move axially along the support rod, thereby causing the transverse members of the working layer, which are in a semi-relaxed state, to undergo vertical displacement. This structure enables continuous, stepless adjustment of the working layer height, eliminating the discrete errors caused by the fixed step distance of standard scaffolding. It allows the operating platform to accurately fit the staggered elevation requirements of the atrium shell structure caused by surface variations, solving the problem of the operating surface being difficult to closely adhere to the working point during construction on irregular curved surfaces.

[0018] This invention employs a second connecting component with a rotary hinge structure, allowing the first fixing ring holding the transverse member to horizontally deflect relative to the L-shaped connector around a rotation axis. This rotational freedom allows the transverse member to adjust its axial angle according to the actual orientation of the mesh shell edge, ensuring the frame edge conforms parallel to the tangent of the irregular mesh shell boundary. This design avoids the suspension or collision problems that traditional orthogonal frames experience at irregular boundaries, improving the closure and stability of the frame edge.

[0019] The construction process of this invention employs a semi-relaxed adjustment followed by a re-locking after reaching the target position, thus integrating the adjustment mechanism with the load-bearing mechanism while separating their load-bearing components. After fine-tuning the height, the fasteners of the connecting components are tightened again, restoring the node to a rigid friction lock with the support rod. This ensures that the vertical load during construction is primarily borne by the rigid node, rather than being applied to the threaded adjustment mechanism for an extended period. This dual-protection mechanism achieves both precise adjustment and structural safety of the frame under construction loads. Attached Figure Description

[0020] Figure 1 This is a perspective view of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the first connecting component in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the second connection component according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the disassembled scaffolding structure according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the first connecting component according to an embodiment of the present invention.

[0021] Explanation of icon numbers: 1. Atrium mesh shell; 2. Scaffolding; 3. First locking block; 4. Second locking block; 5. First connecting block; 6. Second connecting block; 7. Fixing screw; 8. L-shaped connector; 9. Rotating shaft; 10. Limiting ring; 11. First fixing ring; 12. Second fixing ring; 13. Fixing block; 14. Fixing rod; 15. First connecting assembly; 16. Third fixing ring; 17. Threaded rod; 18. Guide rod; 19. Insertion block; 20. Fastening bolt; 21. Second connecting assembly; 22. Support rod; 23. Connecting sleeve; 24. Screw rod; 25. Fixing plate; 26. Connecting disc. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See Figures 1 to 5 , Figure 1 This is a schematic diagram of the overall structure according to an embodiment of the present invention. The present invention provides a construction process for the erection of a frame for an operating platform of a central atrium shell 1, used for assembling a staggered adaptive operating scaffold 2, comprising the following steps: S1, Assemble the basic support module; Screw the lead screw 24 into the connecting sleeve 23, install the connecting sleeve 23 at the bottom of the support rod 22, and install the fixing plate 25 at the bottom of the lead screw 24; Rotate the lead screw 24 according to the ground height difference, adjust the distance between the fixing plate 25 and the connecting sleeve 23, so that the multiple support rods 22 remain vertical; S2, Assemble the middle drive adjustment module; Sleeve and fix the third fixing ring 16 in the predetermined position in the middle of the steel pipe, and install the threaded rod 17 and the guide rod 18 in parallel on one side of the third fixing ring 16; Sleeve the connecting plate 26 through the threaded rod 17 and the guide rod 18 and sleeve it on the outside of the steel pipe, and install the insertion block 19 at the end of the threaded rod 17 and the guide rod 18 for limiting; S3, Assemble the first connecting component 15 for the straight section; at the straight connection of the frame, fasten the first locking block 3 and the second locking block 4 to the outer wall of the steel pipe, and fasten the first connecting block 5 and the second connecting block 6 to the outer wall of the transverse member; insert the fixing screw 7 and tighten it, and lock the transverse member and the steel pipe through the first connecting component 15. S4, Assemble the second connecting component 21 of the corner section; at the corner connection of the frame, put the L-shaped connector 8 onto the support rod 22 through the limiting ring 10, and tighten the fixing rod 14 to lock the height of the L-shaped connector 8; place the horizontal rod between the first fixing ring 11 and the second fixing ring 12, and tighten the fixing block 13 to lock the horizontal rod. S5, adjust the plane angle and vertical layer height of the scaffold; loosen the pivot 9, rotate the first fixing ring 11 to adjust the angle between the horizontal member and the steel pipe, and lock the pivot 9 after adapting to the construction path; rotate the threaded rod 17 to drive the connecting plate 26 to move the horizontal member vertically upward along the guide rod 18, and make precise adjustments to the working layer height of the scaffold 2.

[0024] See Figure 5 , Figure 5 This is a schematic diagram of the overall assembly structure of the frame support unit according to an embodiment of the present invention.

[0025] The specific implementation method for the assembly of the foundation support module and the terrain adjustment step (S1) in the construction process of the atrium shell operating platform is as follows: S101, Assemble the basic adjustment mechanism. Select connecting sleeve 23, which is a hollow tubular component with internal threads. Select lead screw 24, which is a long rod with trapezoidal or rectangular threads machined on its outer surface. Align one end of lead screw 24 with the bottom opening of connecting sleeve 23 and apply rotational torque to screw lead screw 24 into connecting sleeve 23 along the thread trajectory. The screwing depth must meet the minimum engagement length specified in the design to ensure axial load-bearing capacity. Select fixing plate 25, which is a load-bearing component with a flat base. Install it to the exposed bottom end of lead screw 24 by welding or bolting to form an adjustable base assembly.

[0026] S102, Connect the vertical support rod. Select support rod 22, which is made of standard steel pipe. The upper opening of the assembled connecting sleeve 23 is sleeved on the outer wall of the bottom end of the support rod 22 or inserted into its inner wall. The connection is made rigidly by means of pin, bolt, or welding, so that the connecting sleeve 23, the threaded rod 24 and the support rod 22 form a coaxially extended integral support unit. In actual construction, the connection method of the bottom of the support rod 22 can be selected by those skilled in the art according to the steel pipe specifications, such as socket type or flange connection type. This is a well-known technology in the field and will not be described in detail here.

[0027] S103, Frame positioning and initial verticality adjustment. Based on the pre-measured coordinates of the positioning points, each support rod 22, which integrates the basic adjustment mechanism, is placed vertically on the ground. Due to potential height differences in the atrium floor, the tops of the support rods 22 may not be on the same horizontal plane. In this case, the operator uses a wrench or other rotating tools to apply force to the hexagonal nut section of the lead screw 24, driving the lead screw 24 to rotate relative to the connecting sleeve 23.

[0028] S104, implement height compensation and leveling. When the lead screw 24 is rotated clockwise or counterclockwise, the screw drive principle is used to force the fixed plate 25 to undergo axial displacement relative to the connecting sleeve 23. If the ground is low, the lead screw 24 is rotated to increase its extension length, thereby filling the gap between the ground and the bottom of the support rod 22. If the ground is high, the lead screw 24 is rotated to retract it. With the help of a laser level or spirit level, the adjustment is made until the preset benchmark scale lines on all support rods 22 are at the same horizontal height, eliminating the influence of uneven ground on the overall verticality of the frame and ensuring that multiple support rods 22 maintain a vertical and parallel stress state.

[0029] See Figure 2 and Figure 4 , Figure 4 This is a schematic diagram of the structure of a central drive adjustment module according to an embodiment of the present invention. Figure 2 This is a partial schematic diagram showing the completed assembly of the central drive adjustment module. The central drive adjustment module is used to achieve independent fine-tuning of the working layer height without changing the position of the scaffold 2 uprights' foundations. Step S2 specifically includes the following sub-steps: S201, Installation of the fixed base unit. Select the predetermined elevation position at the middle of the upright of scaffolding 2 steel pipe as the installation point. Fit the third fixing ring 16 around the steel pipe. The inner diameter of the third fixing ring 16 matches the outer diameter of the steel pipe, and fasteners are provided on the side wall of the third fixing ring 16. Figure 5 The fastening bolt 20 shown applies radial pressure by tightening the fastener, and uses friction to rigidly lock the third fixing ring 16 to the outer wall of the steel pipe, preventing it from sliding along the axial direction of the steel pipe or rotating around the axis. The third fixing ring 16 serves as the load-bearing base of the entire adjustment module, used to bear the vertical load transmitted from above.

[0030] S202, Installation of the drive assembly and guide assembly. A threaded rod 17 and a guide rod 18 are respectively installed on a mounting base extending from one side of the third retaining ring 16. The threaded rod 17 serves as the drive component, with a drive head, such as a hexagonal head or handle interface, at its end for applying torque to a tool, and its axis is parallel to the central axis of the steel pipe. The guide rod 18 serves as the guide component, with a smooth surface and its axis also parallel to the central axis of the steel pipe. The bottom ends of both the threaded rod 17 and the guide rod 18 are fixedly connected to the third retaining ring 16, forming a cantilever support structure. For the connection method between the threaded rod 17 and the third retaining ring 16, those skilled in the art can use conventional mechanical connection methods such as welding, threaded engagement, or pin connection, which will not be elaborated here.

[0031] S203, Assembly of the load adjusting plate. The connecting plate 26 serves as a moving component supporting the work platform. Its outer periphery is provided with connecting interfaces such as flanges or connecting holes for connecting transverse members. The main body of the connecting plate 26 has a central hole through which the steel pipe passes. Its side extensions have internal threaded holes that mate with the threaded rod 17, and guide holes that mate with the guide rod 18. The connecting plate 26 is inserted from top to bottom, allowing the threaded rod 17 to be screwed into the internal threaded hole to establish a threaded transmission connection, while the guide rod 18 is inserted into the guide hole to establish an axial sliding fit. At this point, the connecting plate 26 is fitted over the outside of the steel pipe, with a gap maintained between it and the outer wall of the steel pipe to ensure that the connecting plate 26 can move axially relative to the steel pipe without interference.

[0032] S204, Installation of the end-position limiting component. An insertion block 19 is installed at the top of the threaded rod 17 and / or the top of the guide rod 18. The outer diameter of the insertion block 19 is larger than the corresponding hole diameter on the connecting disc 26, forming a mechanical limiting structure. The insertion block 19 is fixed to the end of the rod body by threaded fastening, snap-fit, or interference fit, preventing the connecting disc 26 from unscrewing and falling off during adjustment, thereby ensuring the structural integrity and safety of the adjustment module.

[0033] See Figure 5 , Figure 5 This is a schematic diagram of the structure of a first connecting component according to an embodiment of the present invention. The first connecting component 15 is used to construct the main frame of the straight section of the scaffold, ensuring that a rigid orthogonal connection node is formed between the vertical steel pipe uprights and the horizontal members. Step S3 specifically includes the following sub-steps: S301, Alignment and Installation of the Vertical Clamping Unit. At a predetermined node height position on the steel pipe, the first clamping block 3 and the second clamping block 4 are placed on both sides of the outer wall of the steel pipe. The inner surfaces of both the first clamping block 3 and the second clamping block 4 are provided with arc-shaped grooves matching the outer diameter of the steel pipe. After they are engaged, they form a first clamping structure, tightly covering the circumferential surface of the steel pipe. At this time, the first clamping block 3 and the second clamping block 4 are kept in a pre-assembled state, allowing for minor axial or circumferential positional adjustments on the steel pipe to align with the elevation.

[0034] S302, Alignment and installation of the transverse clamping unit. Place the transverse member to be installed on the outer mounting surface of the first locking block 3 or the second locking block 4. Place the first connecting block 5 and the second connecting block 6 on both sides of the outer wall of the transverse member. The inner surfaces of the first connecting block 5 and the second connecting block 6 are also provided with arc-shaped grooves that match the outer diameter of the transverse member. After they are aligned, they form a second clamping structure. Adjust the angle of the transverse member so that its axis is perpendicular to the axis of the steel pipe. In this embodiment, the first locking block 3 and the first connecting block 5 are an integral structure fixed back to back or fixed by welding, so that the first clamping structure and the second clamping structure form a cross-shaped integral force-bearing component.

[0035] S303, Fastener Insertion and Fitting. Pass the fixing screw 7 through the pre-drilled through holes on the first engaging block 3 and the second engaging block 4, as well as the pre-drilled through holes on the first connecting block 5 and the second connecting block 6. Screw the end of the fixing screw 7 into the matching nut or the pre-drilled internal thread hole on the engaging block. Manually pre-tighten the fixing screw 7 to eliminate any gaps between the components, initially positioning the first connecting assembly 15 and ensuring that the transverse member does not fall off under its own weight, while still allowing for fine adjustments.

[0036] S304, Rigid Locking. Tighten the fixing screw 7 using a wrench or similar tool, applying the preset locking torque. The axial tension of the fixing screw 7 forces the first engaging block 3 and the second engaging block 4 to move radially closer together to press against the steel pipe, while simultaneously forcing the first connecting block 5 and the second connecting block 6 to move radially closer together to press against the transverse member. The static friction generated between the inner wall of the clamp and the outer wall of the pipe prevents relative sliding or rotation between the transverse member and the steel pipe, achieving rigid locking of the joint. The selection of the fixing screw 7 and its locking torque standard can be determined by those skilled in the art according to relevant scaffolding specifications, and will not be elaborated upon here.

[0037] See Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the structure of a second connecting component according to an embodiment of the present invention. The second connecting component 21 is mainly used for connecting at the corners of the frame edge or non-orthogonal nodes, and achieves an adaptive angle connection between the horizontal members and the vertical support rods 22 through a rotatable hinge structure. Step S4 specifically includes the following sub-steps: S401, Installation of the corner connection body. The L-shaped connector 8 is installed on the outside of the vertical support rod 22, mates with the limiting ring 10. The vertical portion of the L-shaped connector 8 has an inner arc surface or sleeve structure that adapts to the outer diameter of the support rod 22. The limiting ring 10 is fitted onto the support rod 22 and located at the bottom of the L-shaped connector 8, providing axial support. The L-shaped connector 8 is slid axially along the support rod 22 to a predetermined node height position, which corresponds to the edge connection elevation of the reticulated shell structure.

[0038] S402, Vertical Position Locking. Tighten the fixing rod 14 mounted on the limiting ring 10 or the body of the L-shaped connector 8. The fixing rod 14 is preferably a set screw or a bolt with a handle, which passes through a threaded hole in the side wall of the limiting ring 10 and abuts against the outer wall of the support rod 22 at its end, or the limiting ring 10 is forced to retract and clamp the support rod 22 by threaded tightening. The preload applied by the fixing rod 14 positions the L-shaped connector 8 in the vertical direction, preventing it from axially slipping under subsequent loads.

[0039] S403, Insertion of the lateral clamping structure. The second connecting assembly 21 also includes a lateral clamping mechanism composed of a first fixing ring 11 and a second fixing ring 12. The first fixing ring 11 is hinged to the horizontal arm end of the L-shaped connector 8 extending outward through a pivot 9, so that it can rotate in the horizontal plane around the axis of the pivot 9. One end of the lateral rod to be installed is placed in the installation space formed by the first fixing ring 11 and the second fixing ring 12. At this time, the first fixing ring 11 and the second fixing ring 12 are in an unlocked state, allowing the lateral rod to be axially extended and retracted within it.

[0040] S404, Angle Adaptation and Rigid Locking. Based on the actual tangent angle of the mesh shell edge, the transverse member is rotated, causing the first fixing ring 11 to rotate around the pivot 9 until the angle of the transverse member matches the construction path. Then, the fixing block 13 is operated to lock the clamping mechanism. The fixing block 13 is a bolt assembly or similar fastener that passes through the connecting lugs of the first fixing ring 11 and the second fixing ring 12. Tightening the fixing block 13 forces the second fixing ring 12 to move closer to the first fixing ring 11, thereby clamping the transverse member located inside it. Simultaneously, the locking nut at the end of the pivot 9 is tightened or a matching locating pin is inserted to eliminate the rotational freedom of the pivot 9, thus completing the angle fixation and rigid connection of the corner node.

[0041] See Figure 1 , Figure 2 and Figure 4 , Figure 1 This is a schematic diagram of the overall structure according to an embodiment of the present invention. Figure 5 This is a partial schematic diagram of the central drive adjustment module. Step S5 is the final shaping stage of the frame erection. Through multi-dimensional dynamic adjustment, the operating platform can accurately fit the curved boundary of the reticulated shell structure. This step specifically includes the following sub-steps: S501, Angle adaptation of corner nodes. For the second connecting assembly 21 located at the corner of the frame edge, first release the rotation constraint. The operator loosens the locking piece at the end of the rotating shaft 9 or pulls out the positioning pin, allowing the first fixing ring 11 to gain the freedom to rotate around the axis of the rotating shaft 9. According to the actual tangent direction of the edge of the reticulated shell structure, manually move the transverse member to cause the first fixing ring 11 to deflect relative to the L-shaped connector 8. When the axial direction of the transverse member is parallel to the construction path, retighten the locking piece on the rotating shaft 9 to complete the rigid locking of the angle.

[0042] S502, Preparation for linkage of the vertical adjustment system. Before adjusting the floor height, the axial friction constraint of the transverse members on the steel pipe needs to be released. Slightly loosen the fasteners, such as the fixing screws 7 or fixing rods 14, used to clamp the steel pipe in the first connecting assembly 15 or the second connecting assembly 21, so that they are in a semi-relaxed state, that is, maintaining radial limit but allowing axial sliding along the steel pipe. At the same time, confirm that the upper surface of the connecting plate 26 of the central drive adjustment module is in contact or fixedly connected with the bottom surface of the transverse member connecting assembly, ensuring that the connecting plate 26 can transmit upward thrust.

[0043] S503, Precision drive for working layer height. A wrench or special tool, such as a hexagonal head, is used to apply rotational torque to the drive head at the top of the threaded rod 17. The threaded rod 17 rotates in place, driving the connecting plate 26 to move axially upwards or downwards along the guide rod 18 and the steel pipe using the principle of threaded transmission. The connecting plate 26 acts as a lifting base, supporting the semi-relaxed transverse rod connecting assembly for synchronous movement. By controlling the number of rotations of the threaded rod 17, the working layer height is precisely adjusted to the millimeter level until the design elevation is reached.

[0044] S504, overall rigid locking. After the plane angle and vertical height are adjusted to the correct positions, tighten all fasteners on the first connecting component 15 or the second connecting component 21 again, so that the node re-establishes a rigid friction lock with the steel pipe at the new height position, bearing the main vertical load. At this time, the threaded rod 17 can be retained as an auxiliary support or a safety redundancy structure, using the self-locking property of the thread to prevent the node from accidentally sliding down.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A construction process for erecting a frame of a central atrium shell operating platform, used for assembling a staggered, self-adaptive scaffold (2), characterized in that, Includes the following steps: S1, Assemble the basic support module: Erect multiple support rods (22) and use the adjustment mechanism at the bottom to level the support rods (22); S2, Assemble the middle drive adjustment module: Fix the third fixing ring (16) at a predetermined position in the middle of the crossbar connected to the upper end of the support rod (22), install the threaded rod (17) and guide rod (18) parallel to the support rod (22) on the third fixing ring (16), and movably sleeve the connecting plate (26) on the outside of the support rod (22). The connecting plate (26) is connected to the threaded rod (17) and guide rod (18). S3, Assemble the connecting components: Install the first connecting component (15) on the straight section of the support rod (22), install the second connecting component (21) at the corner of the support rod (22), and connect the transverse members through the first connecting component (15) and the second connecting component (21); S4, Adjust the frame shape: Rotate the threaded rod (17) to drive the connecting plate (26) to move axially along the support rod (22), thereby driving the horizontal rod to adjust the vertical height; and adjust the angle of the second connecting component (21) to adapt to the edge shape of the atrium shell (1).

2. The construction process for the frame erection of the atrium shell operating platform according to claim 1, characterized in that, In step S1, the adjustment mechanism includes a connecting sleeve (23), a lead screw (24), and a fixing plate (25). During assembly, the connecting sleeve (23) is installed at the bottom of the support rod (22), the lead screw (24) is screwed into the connecting sleeve (23), and the fixing plate (25) is installed at the bottom of the lead screw (24). By rotating the lead screw (24), the axial distance between the fixing plate (25) and the connecting sleeve (23) is changed, thereby realizing the vertical correction of the support rod (22).

3. The construction process for the frame erection of the atrium shell operating platform according to claim 1, characterized in that, In step S2, the connecting disc (26) is provided with a threaded hole that mates with the threaded rod (17) and a guide hole that mates with the guide rod (18); During assembly, the threaded rod (17) is screwed into the threaded hole of the connecting plate (26), the guide rod (18) is inserted into the guide hole of the connecting plate (26), and the insertion block (19) is installed at the ends of the threaded rod (17) and the guide rod (18) to restrict the connecting plate (26) from coming out.

4. The construction process for the frame erection of the atrium shell operating platform according to claim 1, characterized in that, The third fixing ring (16) has a fastening bolt (20) on its side wall; in step S2, the third fixing ring (16) is locked in the middle of the crossbar by tightening the fastening bolt (20), so that it serves as a fixed base for bearing vertical loads.

5. The construction process for the frame erection of the atrium shell operating platform according to claim 1, characterized in that, In step S3, the first connecting component (15) includes a first locking block (3), a second locking block (4), a first connecting block (5), and a second connecting block (6); During assembly, the first locking block (3) and the second locking block (4) are fastened together and covered on the outer wall of the support rod (22), the first connecting block (5) and the second connecting block (6) are fastened together and covered on the outer wall of the transverse rod, and the fixing screws (7) are inserted to lock the components, so that the transverse rod and the support rod (22) are orthogonally fixed.

6. The construction process for the frame erection of the atrium shell operating platform according to claim 1, characterized in that, In step S3, the second connecting assembly (21) includes an L-shaped connector (8), a limiting ring (10), and a fixing rod (14). During assembly, the L-shaped connector (8) and the limiting ring (10) are sleeved on the support rod (22), and the L-shaped connector (8) is locked at a predetermined height of the support rod (22) by tightening the fixing rod (14). The L-shaped connector (8) is used to support the end of the transverse rod.

7. The construction process for the frame erection of the atrium shell operating platform according to claim 6, characterized in that, The second connecting assembly (21) further includes a first retaining ring (11) hinged to the L-shaped connector (8) via a pivot (9), and a second retaining ring (12) cooperating with the first retaining ring (11); During assembly, the transverse rod is placed between the first fixing ring (11) and the second fixing ring (12), and the first fixing ring (11) and the second fixing ring (12) are locked together by the fixing block (13) to clamp the transverse rod.

8. The construction process for the frame erection of the atrium shell operating platform according to claim 7, characterized in that, Adjusting the angle of the second connecting component (21) in step S4 specifically includes: Release the locking state of the rotating shaft (9) so that the first fixing ring (11) can rotate relative to the L-shaped connector (8); Rotate the transverse rod to cause the first fixed ring (11) to deflect until the axial direction of the transverse rod is parallel to the edge tangent direction of the atrium shell (1); Relock the pivot (9) to keep the second connecting assembly (21) at the adjusted angle.

9. The construction process for the frame erection of the atrium shell operating platform according to claim 1, characterized in that, Step S4, adjusting the vertical height, specifically includes: Slightly loosen the fasteners on the first connecting assembly (15) or the second connecting assembly (21) so that the transverse rod is in a semi-relaxed state relative to the support rod (22) while maintaining radial restraint but allowing axial sliding; Drive the threaded rod (17) to rotate, and use the connecting plate (26) to lift the first connecting component (15) or the second connecting component (21) in a semi-relaxed state to move synchronously to the design elevation; Tighten the fasteners on the first connecting component (15) or the second connecting component (21) again to complete the rigid locking.

10. The construction process for the frame erection of the atrium shell operating platform according to claim 9, characterized in that, The connecting plate (26) is fixedly connected to the first connecting component (15) or the second connecting component (21) via a connector.

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