Multi-bar converging point efficient connection system of curved surface curtain wall and installation method

Abstract

The application discloses a multi-rod gathering point efficient connection system of a curved surface curtain wall and a mounting method, and relates to the field of curtain wall construction. The multi-rod gathering point efficient connection system comprises a central point base, which comprises an aluminum alloy support and an aluminum alloy public fastener, the aluminum alloy support is a first cylinder, a plurality of vertical first sliding grooves are formed in the periphery of the first cylinder, one aluminum alloy public fastener is arranged in each first sliding groove, and an internal hexagonal tight stainless steel screw is arranged at the upper and lower ends of the aluminum alloy public fastener in the first sliding groove. The adapter system comprises an aluminum alloy rotating public fastener, the aluminum alloy rotating public fastener comprises a first cuboid part and a cylindrical part, the cylindrical part is inserted into a second sliding groove, the second sliding groove is fixedly connected with a second cuboid part at an end away from the aluminum alloy rotating public fastener, and the second cuboid part is inserted into a connection plug of an aluminum alloy joist. The application greatly simplifies the construction process of the efficient connection of the multi-rod gathering point in space, and enables the rod to adapt to the change of various space angles.

Description

Technical Field

[0001] This invention relates to the field of architectural decoration technology, and in particular to a high-efficiency connection system and installation method for multi-member convergence points of curved curtain walls. Background Technology

[0002] Curved curtain walls bring architects' cutting-edge design concepts to life, directly reflecting economic development, scientific and technological progress, and cultural prosperity. Curved architecture aligns better with natural laws, making buildings more dynamic and vibrant, satisfying the public's pursuit of beauty. Furthermore, with advancements in building technology, the gap in complexity and cost between curved and traditional curtain walls is gradually narrowing, leading to their widespread adoption.

[0003] However, to save costs and simplify construction processes, curved curtain wall skins are typically fitted into several triangular flat skins using BIM technology. At the convergence points of multiple members, traditional solutions use directly welded steel members. However, when there are many changes in the angle of the connection points, cylindrical transition bodies need to be installed at the intersections. Traditional connection methods require precise positioning of all members on site, resulting in a huge workload for measurement and layout. Moreover, this connection method is limited to steel, which has significant limitations. The fabrication and installation of the members requires considerable effort and time, leading to low efficiency.

[0004] Chinese patent CN 208379766 U discloses a bolted connection suitable for aluminum alloy spatial grid structures, including a central ring column, a connector, and angle brackets. The inner wall of the central ring column is provided with an arc-shaped washer, and the outer wall of the central ring column is cut with a connecting surface. The connecting surface and the arc-shaped washer have connecting holes. The arc-shaped washer is connected to the connector via bolts passing through the connecting holes. The connector is C-shaped or H-shaped. The angle brackets are located on the inner side of the connector and are used to bolt the central ring column and the connector. The connector is connected to the required assembly rods using Hooke bolts. However, this patent has the following defects in its implementation:

[0005] (1) The connecting surface cut on the outer wall of the central ring column is fixed to the connecting parts by angle brackets and bolts. After the connection is made, the connecting parts cannot be adjusted in the left, right and up and down positions after being fixed.

[0006] (2) The outer wall of the central ring column is cut with four connecting surfaces. Each connecting surface is connected to the connector by two bolts in two sets of horizontal bolts. The connecting surfaces and connectors overlap after being connected. Therefore, a maximum of four connectors can be connected on the central ring column, and it is not possible to install more than four sets of connectors.

[0007] The purpose of this invention is to provide an efficient connection system and installation method for multiple member convergence points of curved curtain walls, in order to solve the above-mentioned problems in the prior art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency connection system for the convergence point of multiple rods of a curved curtain wall, comprising: a center point base, the center point base including an aluminum alloy support and an aluminum alloy male clamp, the aluminum alloy support being a first cylinder, the first cylinder having multiple vertical first grooves on its outer periphery, each vertical first groove containing an aluminum alloy male clamp, the aluminum alloy male clamp being T-shaped;

[0009] The adapter system includes an aluminum alloy rotating male component and an aluminum alloy rotating female component. The aluminum alloy rotating male component includes a first cuboid portion and a cylindrical portion. The first cuboid portion of the aluminum alloy rotating male component is provided with aluminum alloy corner brackets at the top and bottom. The cylindrical portion of the aluminum alloy rotating male component is inserted and connected to one side of the aluminum alloy rotating female component. The other side of the aluminum alloy rotating female component is provided with a second cuboid portion, which is inserted and connected to the aluminum alloy keel connecting core.

[0010] In a preferred embodiment, a second slide groove is provided on one side of the cylindrical portion of the aluminum alloy rotating female part near the rotating male part. The second slide groove has an arc-shaped opening, and the cylindrical portion is inserted into the second slide groove.

[0011] In a preferred embodiment, the first grooves on the multiple aluminum alloy supports are evenly spaced, and the first groove is an arc-shaped groove with an outer opening.

[0012] In a preferred embodiment, the end of part I of the aluminum alloy male clamp that is away from part I is a second cylinder. The second cylinder is sleeved with the first slide groove, and the second cylinder of the aluminum alloy male clamp is placed in the middle of the first slide groove of the aluminum alloy support. Socket head cap stainless steel screws are engaged between the second cylinder of the aluminum alloy male clamp and the upper end of the first slide groove, and between the second cylinder of the aluminum alloy male clamp and the lower end of the first slide groove.

[0013] In a preferred embodiment, the aluminum alloy male bracket has four first pin holes at its four corners. The horizontal part of the aluminum alloy corner bracket abuts against the first cuboid part of the aluminum alloy rotating male bracket. The horizontal part of the aluminum alloy corner bracket has two second pin holes. The first cuboid part has a third pin hole at the corresponding position of the second pin holes. A first set of stainless steel bolts passes through the second pin holes and the third pin holes to fix the aluminum alloy corner bracket to the aluminum alloy rotating male bracket. The vertical parts of the two aluminum alloy corner brackets are located at the end of the first cuboid part away from the second cylindrical part and are flush with one end of the first cuboid part.

[0014] In a preferred embodiment, the vertical portions of the two aluminum alloy angle brackets and the inner side surface of the first cuboid portion form a plane, the area of ​​which is equal to and coincides with a part of the aluminum alloy male bracket. The vertical portions of the two aluminum alloy angle brackets and the four first pin holes of a part of the aluminum alloy male bracket are provided with four fourth pin holes at corresponding positions.

[0015] In a preferred embodiment, two first stainless steel pan head self-tapping screws at the top and bottom pass through the second groove and cylindrical part of the aluminum alloy rotating female part to fix the aluminum alloy rotating male part and the aluminum alloy rotating female part together.

[0016] In a preferred embodiment, two second stainless steel pan head self-tapping screws at the top and bottom pass through the second cuboid portion of the aluminum alloy keel connecting core and the aluminum alloy rotating female component, thereby fixing the aluminum alloy rotating female component and the aluminum alloy keel connecting core together.

[0017] In a preferred embodiment, multiple sets of second stainless steel bolts pass through the fourth pin holes of the aluminum alloy angle brackets of the multiple sets of adapter systems and the first pin holes of the multiple aluminum alloy male clamps, fixing the multiple sets of adapter systems to the center point base. The aluminum alloy keel connecting cores of the multiple sets of adapter systems are respectively inserted and fixed to multiple aluminum alloy keels.

[0018] This invention also discloses an installation method for the above-mentioned high-efficiency connection system of multi-member convergence points of curved curtain walls, comprising the following steps:

[0019] S1. Insert the internal hexagonal set stainless steel screw 11 into the lower end of the first slide groove 3 opened in the aluminum alloy support (1), insert the aluminum alloy male clamp 2 from top to bottom, and insert the internal hexagonal set stainless steel screw 11 into the upper opening of the first slide groove 3. During the construction process, adjust the height of the aluminum alloy male clamp 2 by adjusting the internal hexagonal set stainless steel screw 11. The aluminum alloy male clamp 2 is adjusted to a suitable angle by left and right adjustment in the first slide groove 3.

[0020] S2, aluminum alloy rotating male part 5 and two aluminum alloy angle brackets 6 are connected into a whole by the first stainless steel bolt group 7, and then aluminum alloy rotating male part 5 is inserted into aluminum alloy rotating female part 8. After the angle is adjusted, the upper and lower parts are connected into a whole by stainless steel pan head self-tapping screws respectively.

[0021] S3. Insert the aluminum alloy rotating female part 8 into the aluminum alloy keel connecting core 18, and then connect the upper and lower parts with stainless steel pan head self-tapping screws to form a whole. Then insert the aluminum alloy keel connecting core 18 into the cavities at both ends of the aluminum alloy keel 10.

[0022] S4. Align the first pin hole 4 of the aluminum alloy male clamp 2 with the fourth pin hole 14 of the aluminum alloy angle bracket 6, and bolt two second stainless steel bolt groups 15 on each side to complete the installation of a set of rods.

[0023] S5. Follow the above steps to complete the installation of the other groups of rods.

[0024] Compared with the prior art, the present invention has the following features and beneficial effects:

[0025] 1. The numerous arc-shaped slots on the aluminum alloy base allow the number of connecting rods at the nodes to vary within a certain range;

[0026] 2. The angle between the slot and the male clamp can also be adjusted, so that the angle of the rod can be flexibly changed within the plane;

[0027] 3. In the spatial dimension, the rod can be adjusted not only on the plane but also in the vertical plane, realizing multi-angle adjustment of the rod in space and meeting the positioning and installation of panels in complex spaces;

[0028] 4. This spatial connection system requires no complex customization processes for any of its parts; it can be completed simply by opening molds from the profiles.

[0029] 5. This invention enables the adjustment, positioning, and installation of multiple rods at the convergence point, while ensuring that rods at any position can be replaced independently, thus improving the efficiency of later maintenance and replacement. Attached Figure Description

[0030] The present invention will now be described in further detail with reference to the accompanying drawings.

[0031] Figure 1 This is a three-dimensional view of the aluminum alloy support and aluminum alloy male clamp of the present invention;

[0032] Figure 2 This is a three-dimensional view of the connection between the aluminum alloy support and the aluminum alloy male clamp of the present invention;

[0033] Figure 3 This is a three-dimensional view of the aluminum alloy angle bracket and aluminum alloy rotating component of the present invention;

[0034] Figure 4 This is a three-dimensional view of the connection between the aluminum alloy angle bracket and the aluminum alloy rotating male component of the present invention;

[0035] Figure 5 This is a three-dimensional view of the aluminum alloy rotating female part, the aluminum alloy keel connecting core, and the second stainless steel pan head self-tapping screw of the present invention.

[0036] Figure 6 This is a three-dimensional view of the aluminum alloy rotating female part, the aluminum alloy keel connecting core, and the connection of the second stainless steel pan head self-tapping screw of the present invention.

[0037] Figure 7 A three-dimensional diagram showing the connection between the central point base and the adapter system of this invention;

[0038] Figure 8 This is a three-dimensional view of the entire invention.

[0039] Reference numerals: 1 - Aluminum alloy support, 2 - Aluminum alloy male clamp, 21 - Second cylinder, 3 - First slide groove, 4 - First pin hole, 5 - Aluminum alloy rotating male, 51 - First cuboid part, 52 - Cylindrical part, 53 - Second cuboid part, 6 - Aluminum alloy angle bracket, 7 - First stainless steel bolt group, 8 - Aluminum alloy rotating female part, 9 - Second slide groove, 10 - Aluminum alloy keel, 11 - Socket head stainless steel set screw, 12 - Second pin hole, 13 - Third pin hole, 14 - Fourth pin hole, 15 - Second stainless steel bolt group, 16 - First stainless steel pan head self-tapping screw, 17 - Second stainless steel pan head self-tapping screw, 18 - Aluminum alloy keel connecting insert. Detailed Implementation

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0041] Example 1:

[0042] See the examples. Figure 1-3 As shown, the high-efficiency connection system and installation method for the multi-member convergence point of the curved curtain wall of the present invention includes a center point base, which includes an aluminum alloy support 1 and an aluminum alloy male clamp 2. The aluminum alloy support 1 is a first cylinder, and multiple vertical first grooves 3 are opened on the outer periphery of the first cylinder. The multiple first grooves 3 are evenly spaced, and the first groove 3 is a circular outer opening groove. Each first groove 3 is provided with an aluminum alloy male clamp 2 at intervals. The arrangement of multiple first grooves 3 allows the number of aluminum alloy male clamps 2 to vary within a certain range.

[0043] Furthermore, the aluminum alloy male clamp 2 is T-shaped, with four first pin holes 4 at its four corners. The end of the aluminum alloy male clamp 2 furthest from the first part is a second cylinder 21, which is fitted into the first slide groove 3. The second cylinder 21 is placed in the middle of the first slide groove 3 of the aluminum alloy support 1. A hexagonal set screw 11 is inserted between the upper end of the second cylinder 21 and the lower end of the first slide groove 3. After the first slide groove 3 is connected to the aluminum alloy male clamp 2, it can still be adjusted to a certain angle, allowing the angle of the component to change flexibly in the plane. In the spatial dimension, the angle of the aluminum alloy male clamp 2 can also be adjusted horizontally and vertically by adjusting the position of the hexagonal set screw 11, achieving multi-angle adjustment of the rod in space and meeting the positioning and installation requirements of complex spatial panels.

[0044] Furthermore, the adapter system includes an aluminum alloy rotating component 5, which includes a first cuboid portion 51 and a cylindrical portion 52. Aluminum alloy corner brackets 6 are provided at the top and bottom of the first cuboid portion 51. Two aluminum alloy corner brackets 6 are located at the top and bottom ends of the first cuboid portion 51, with their horizontal portions abutting against the first cuboid portion 51. Two second pin holes 12 are provided on the horizontal portions of the aluminum alloy corner brackets 6. A third pin hole 13 is provided on the first cuboid portion 51 corresponding to the second pin holes 12. A first stainless steel bolt group 7 passes through the second pin holes 12 and the third pin hole 13 to fix the aluminum alloy corner brackets 6 to the aluminum alloy rotating component 5. The vertical portions of the two aluminum alloy corner brackets 6 are located at one end of the first cuboid portion 51 away from the second cylindrical portion 21 of the aluminum alloy rotating component 5, and are flush with one end of the first cuboid portion 51.

[0045] Furthermore, the vertical portions of the two aluminum alloy angle brackets 6 and one face of the first cuboid portion 51 of the aluminum alloy rotating male part 5 sandwiched between the two aluminum alloy angle brackets 6 form a plane, the area of ​​which is equal to and coincides with a part of the aluminum alloy male clamp 2. Four fourth pin holes 14 are opened at the corresponding positions of the four first pin holes 4 of the vertical portions of the two aluminum alloy angle brackets 6 and the part of the aluminum alloy male clamp 2.

[0046] Furthermore, the cylindrical part 52 of the aluminum alloy rotating male component 5 is inserted into the second groove 9 of the circular opening of the aluminum alloy rotating female component 8, and two first stainless steel pan head self-tapping screws 16 at the top and bottom pass through the second groove 9 of the circular opening of the aluminum alloy rotating female component 8 and the cylindrical part 52 of the aluminum alloy rotating male component 5 to fix the aluminum alloy rotating male component 5 and the aluminum alloy rotating female component 8.

[0047] Furthermore, the cylindrical portion 52 of the aluminum alloy rotating male component 5 is inserted into the circular opening second slide groove 9 of the aluminum alloy rotating female component 8. The end of the circular opening second slide groove 9 of the aluminum alloy rotating female component 8 away from the aluminum alloy rotating male component 5 is fixedly connected to the second cuboid portion 53 of the aluminum alloy rotating female component 8. The second cuboid portion 53 of the aluminum alloy rotating female component 8 is inserted into the aluminum alloy keel connecting core 18. Two second stainless steel pan head self-tapping screws 17 at the top and bottom pass through the aluminum alloy keel connecting core 18 and the second cuboid portion 53 of the aluminum alloy rotating female component 8 to fix the aluminum alloy rotating female component 8 to the aluminum alloy keel connecting core 18. Multiple sets of second stainless steel bolt groups 15 pass through the fourth pin hole 14 of the aluminum alloy angle bracket 6 of the multiple sets of adapter systems and the first pin hole 4 of multiple aluminum alloy male clamps 2 to fix the multiple sets of adapter systems to the center point base. The aluminum alloy keel connecting core 18 of the multiple sets of adapter systems is inserted and fixed to multiple aluminum alloy keels 10.

[0048] This spatial connection system requires no complex customization processes for any of its parts; it can be completed simply by opening molds for the profiles. It also enables the adjustment, positioning, and installation of multiple rods at the convergence point, while ensuring that rods in any position can be replaced independently, thus improving the efficiency of later maintenance and replacement.

[0049] Example 2

[0050] The specific installation steps of this invention are as follows:

[0051] Step 1: First, insert a hexagonal set screw 11 into the lower end of the first groove 3 opened in the aluminum alloy support 1. Then, insert the aluminum alloy male retainer 2 from top to bottom. Next, insert another hexagonal set screw 11 into the upper opening of the first groove 3. During construction, the height of the aluminum alloy male retainer 2 can be adjusted by adjusting the hexagonal set screw 11. At the same time, the angle of the aluminum alloy male retainer 2 in the first groove 3 of the aluminum alloy base can be adjusted left and right to meet the construction requirements.

[0052] Step 2: Connect the aluminum alloy rotating male part 5 and the two aluminum alloy angle brackets 6 into a whole by the first stainless steel bolt group 7. Then, insert the aluminum alloy rotating male part 5 into the aluminum alloy rotating female part 8. After adjusting the angle rotation, drive two stainless steel pan head self-tapping screws on the top and bottom to connect them into a whole.

[0053] Step 3: Insert the aluminum alloy rotating female part 8 into the aluminum alloy keel connecting core 18, and then drive two stainless steel pan head self-tapping screws on the top and bottom to connect them into a whole. Then insert the aluminum alloy keel connecting core 18 into the cavities at both ends of the aluminum alloy keel 10.

[0054] Step 4: Align the first pin hole 4 of the aluminum alloy male clamp 2 with the fourth pin hole 14 of the aluminum alloy angle bracket 6, and bolt four second stainless steel bolt groups 15 on both sides to complete the installation of a set of rods.

[0055] Step 5: Complete the installation of the other components following the steps above.

[0056] 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 multi-bar convergence point efficient connection system of a curved curtain wall, characterized in that, The utility model relates to a center point base, switching system and aluminum alloy angle code, and the center point base comprises an aluminum alloy support (1) and an aluminum alloy public card piece (2), the aluminum alloy support (1) is a first cylinder, a plurality of vertical first sliding slots (3) are formed on the periphery of the first cylinder, one aluminum alloy public card piece (2) is arranged in each vertical first sliding slot (3) at intervals, the aluminum alloy public card piece (2) is T-shaped, and a stainless steel screw (11) is arranged on the upper and lower ends of the aluminum alloy public card piece (2) in the first sliding slot (3). The switching system is provided with a plurality of groups, and each group of the switching system comprises an aluminum alloy rotating male piece (5) and an aluminum alloy rotating female piece (8), the aluminum alloy rotating male piece (5) comprises a first cuboid part (51) and a cylindrical part (52), the first cuboid part (51) of the aluminum alloy rotating male piece (5) is provided with an aluminum alloy angle code (6) on the upper and lower sides, the cylindrical part (52) of the aluminum alloy rotating male piece (5) is connected to one side of the aluminum alloy rotating female piece (8) in a plug-in manner, the other side of the aluminum alloy rotating female piece (8) is provided with a second cuboid part (53), the second cuboid part (53) is connected to an aluminum alloy keel connecting plug core (18) in a plug-in manner, and a plurality of aluminum alloy keel connecting plug cores (18) are respectively connected to a plurality of aluminum alloy keels (10) in a plug-in manner. The aluminum alloy rotating female piece (8) is provided with a second sliding slot (9) on the side close to the cylindrical part (52) of the rotating male piece (5), the second sliding slot (9) has a circular arc-shaped opening, and the cylindrical part (52) is connected to the second sliding slot (9) in a plug-in manner. The first sliding slots (3) formed on the plurality of aluminum alloy supports (1) are arranged at intervals, and the first sliding slots (3) are circular arc-shaped outer opening slots. The end of the I part of the aluminum alloy public card piece (2) away from one part is a second cylinder (21), the second cylinder (21) is sleeved with the first sliding slot (3), the second cylinder (21) of the aluminum alloy public card piece (2) is arranged in the middle of the first sliding slot (3) of the aluminum alloy support (1), and the second cylinder (21) of the aluminum alloy public card piece (2) is clamped with a stainless steel screw (11) between the upper end of the first sliding slot (3) and the second cylinder (21) of the aluminum alloy public card piece (2) and between the lower end of the first sliding slot (3) and the second cylinder (21) of the aluminum alloy public card piece (2). Four first pin holes (4) are formed in the four corners of one part of the aluminum alloy public card piece (2), the horizontal part of the aluminum alloy angle code (6) abuts against the first cuboid part (51) of the aluminum alloy rotating male piece (5), the horizontal part of the aluminum alloy angle code (6) is provided with two second pin holes (12), the first cuboid part (51) is provided with a third pin hole (13) at the position corresponding to the second pin hole (12), a first stainless steel bolt group (7) is arranged to connect the aluminum alloy angle code (6) and the aluminum alloy rotating male piece (5) in a fixed manner by penetrating the second pin hole (12) and the third pin hole (13), the vertical parts of the two aluminum alloy angle codes (6) are arranged at the end of the first cuboid part (51) away from the second cylinder (21), and are arranged in a flush manner with the end of the first cuboid part (51). ​ The vertical part of the two aluminum alloy corner connectors (6) forms a plane with the inner side of the first cuboid part (51), and the area of the plane is equal to and coincides with a part of the aluminum alloy public card (2). Four fourth pin holes (14) are formed in the corresponding positions of the four first pin holes (4) of the part of the aluminum alloy public card (2).

2. The multi-member converging point high-efficiency connection system of the curved curtain wall according to claim 1, characterized in that, Two first stainless steel pan head self-tapping screws (16) are arranged above and below the second sliding groove (9) and the cylindrical part (52) of the aluminum alloy rotating female part (8) to fixedly connect the aluminum alloy rotating male part (5) and the aluminum alloy rotating female part (8).

3. The multi-member converging point high-efficiency connection system of the curved curtain wall according to claim 2, characterized in that, Two second stainless steel pan head self-tapping screws (17) are arranged above and below the aluminum alloy joist connecting plug core (18) and the second cuboid part (53) of the aluminum alloy rotating female part (8) to fixedly connect the aluminum alloy rotating female part (8) and the aluminum alloy joist connecting plug core (18).

4. The multi-member converging point high-efficiency connection system of the curved curtain wall according to claim 3, characterized in that, A plurality of second stainless steel bolt groups (15) pass through the fourth pin holes (14) of the aluminum alloy corner connectors (6) of the plurality of adapter systems and the first pin holes (4) of the plurality of aluminum alloy public cards (2) to fixedly connect the plurality of adapter systems and the center point base.

5. The method for installing the multi-member converging point high-efficiency connection system of the curved surface curtain wall according to any one of claims 1-4, characterized in that: The method comprises the following steps: S1, insert the inner hexagonal locking stainless steel screw (11) into the first sliding groove (3) of the aluminum alloy support (1), and insert the aluminum alloy public card (2) from top to bottom. Insert the inner hexagonal locking stainless steel screw (11) into the upper opening of the first sliding groove (3). During construction, the height of the aluminum alloy public card (2) is adjusted by adjusting the inner hexagonal locking stainless steel screw (11). The aluminum alloy public card (2) is adjusted to the appropriate angle by left and right adjustment in the first sliding groove (3); S2, the aluminum alloy rotating male part (5) and the two aluminum alloy corner connectors (6) are connected into a whole by the first stainless steel bolt group (7), and then the aluminum alloy rotating male part (5) and the aluminum alloy rotating female part (8) are inserted and connected into a whole after angle rotation adjustment; S3, insert the aluminum alloy rotating female part (8) into the aluminum alloy joist connecting plug core (18), and then connect the aluminum alloy joist connecting plug core (18) into the cavities at both ends of the aluminum alloy joist (10) by the stainless steel pan head self-tapping screws; S4, align the first pin holes (4) of the aluminum alloy public card (2) with the fourth pin holes (14) of the aluminum alloy corner connector (6), and respectively bolt two second stainless steel bolt groups (15) on both sides to complete the installation of one group of rods; S5, sequentially complete the installation of other groups of rods according to the above steps.

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