Method for replacing a cable net of a spatial cable net structure

Abstract

This invention discloses a method for replacing cable nets in a spatial cable net structure, belonging to the field of cable replacement technology. It solves the problem in existing technologies where cable angles vary on node plates, making cable replacement impossible. The replacement method includes the following steps: S1, installing reaction device A on node plate A and reaction device B on node plate B; S2, installing a temporary cable and force conversion system between reaction device A and reaction device B; S3, converting the force system of the fork-type anchor pin A on node plate A to be replaced to the temporary cable, thus ensuring that pin A is not stressed, and then removing pin A; S4, continuing to convert the force system of the cable to be replaced to the temporary cable until the stress on the cable to be replaced is reduced to zero; S5, releasing pin B and removing the cable to be replaced; S6, inserting pin B and installing a new cable. This method uses node plates to provide reaction support, allowing replacement of any cable, minimizing the impact on the cable net structure's stress, and causing no damage to the cable net node plates or other cables.

Description

Technical Field

[0001] This invention relates to the field of cable replacement technology, and more specifically, to a method for replacing the cable net of a spatial cable net structure. Background Technology

[0002] The world's largest 500-meter Aperture Spherical Radio Telescope (FAST) has been in operation for many years. As the operation time goes on, the cables will face the problem of replacement within the design service life of the main cable structure due to the real-time dynamic high stress amplitude of the FAST cable net structure and the corrosion of the natural environment.

[0003] In the prior art, patent number CN202111654173.1 discloses a method for replacing cables in a spatial cable net support structure. This replacement method requires the installation of a cable force conversion device and a cable replacement device. The cable force conversion device consists of reaction plates installed on the opposing cable fork lugs of the node discs on both sides of the cable to be replaced, and a tensioning device installed at one end. The cable replacement device consists of a reaction plate installed on the fork lug at one end of the cable to be replaced (opposite to the cable force conversion device), and a reaction plate installed on the corresponding cable fork lug of the node disc, with a tensioning device mounted on the reaction plate. First, the cable replacement device is tensioned to transfer the force from the fork-shaped anchor at one end of the cable to be replaced to the cable replacement device. Then, the cable force conversion device is tensioned while the tensioning device's cable force is released, allowing the force on the tensioning device to be stably transferred to the cable force conversion device. The cable to be replaced and the cable replacement device components on it are then disassembled. A new cable is installed, with one fork-shaped anchor at one end of the new cable attached to the node plate and the other fork-shaped anchor at the other end attached to the cable replacement device components. Then, the cable replacement device is tensioned while the cable force conversion device's cable force is released, allowing the cable force on the cable force conversion device to be steadily transferred to the tensioning device. After the cable force conversion is complete, the fork-shaped anchor of the new cable has returned to the positioning hole of the node plate. The pin is inserted into the fork-shaped anchor of the new cable, and then the tensioning device's cable force is released again, thus stably transferring the cable force to the new cable, completing the installation of the new cable.

[0004] The FAST main cable net consists of 6,670 main cables and 2,225 node disks forming a 500-meter diameter spherical shape. The cable replacement technology mentioned above requires that the cable to be replaced and the cable relative to the fixed reaction plate be in a straight line or within a certain angle. When the cables on both sides are under tension, changes in the position between the cable to be replaced and the two node disks or changes in the angle between the cables may cause instability in the entire cable replacement model, which may easily lead to hidden dangers. Given that the entire cable net is spherical, the horizontal and vertical coordinates between the node disks are diverse, and the relative angles between the cables on the node disks are diverse, the above-mentioned patented technology cannot perform cable replacement operations.

[0005] Therefore, there is an urgent need to design a new method for replacing the cable net in a spatial cable net structure to solve the above problems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide a method for replacing cable nets in a spatial cable net structure. This method uses node disks to provide reaction force support, can be used to replace any cable to be replaced, has little impact on the stress of the cable net structure, does not damage the cable net node disks and other cables, and has the characteristics of high efficiency and low construction cost.

[0007] To achieve the above objectives, the present invention provides a method for replacing the cable net of a spatial cable net structure, the method comprising the following steps:

[0008] S1. Install reaction device A at node A and reaction device B at node B;

[0009] S2. Install a temporary cable and force conversion system between reaction device A and reaction device B;

[0010] S3. Transfer the force system of the fork-type anchor pin A on the node plate A to be replaced to the temporary cable, so that the pin A of the cable to be replaced is not under force, and remove the pin A.

[0011] S4. Continue to transfer the force system of the cable to be replaced to the temporary cable until the cable to be replaced is unloaded to the point where the stress is 0.

[0012] S5. Release pin B and remove the cable to be replaced;

[0013] S6. Install the new cable and insert pin B23;

[0014] S7. Transfer the force system of the temporary cable to the new cable until the pin hole of the fork on side of the node plate A of the new cable is aligned with the pin hole of node plate A.

[0015] S8. Install pin A and continue to transfer the force system of the temporary cable to the new cable until the temporary cable is unloaded to zero stress, so that pin A is under stress.

[0016] S9. Complete the cable replacement and remove the temporary cable, force conversion system, reaction device A, and reaction device B.

[0017] Furthermore, the specific operation of step S2 is as follows:

[0018] Install a two-part cable clamp at one end of the cable to be replaced on node A using a fork-type anchor. Connect reaction device A and reaction device B through a set of 4 temporary cables and two sets of 8 temporary cable anchors I. The set of 4 temporary cables simultaneously passes through a set of 2 spreader beams I, a set of 4 temporary cable anchors II, and a set of 2 spreader beams II. Connect reaction device A and a set of 2 spreader beams II through a set of 8 short tie rods, a set of 8 short tie rod anchors I, and a set of 8 short tie rod anchors II. The set of 8 short tie rods simultaneously passes through a set of 2 spreader beams I. Set a set of 2 jacks I between a set of 2 spreader beams I and a set of 2 spreader beams II. Connect a set of 2 spreader beams II and a set of 1 spreader beam III through a set of 4 long tie rods, a set of 4 long tie rod anchors I, a set of 4 long tie rod anchors II, and a set of 4 long tie rod anchors III. Set a set of 2 jacks II between spreader beam III and the two-part cable clamp.

[0019] Furthermore, the specific operation of step S3 is as follows:

[0020] Drive a set of two jacks I to push a set of two spreader beams I in stages to load a set of four temporary cables and tighten the temporary cable anchorage I; at the same time, drive a set of two jacks II to push a spreader beam III in stages until the force system of the fork-ear type anchorage pin A on the node plate A to be replaced is transferred to a set of four temporary cables, so that pin A is not stressed and pin A is removed.

[0021] Furthermore, the specific operation of step S4 is as follows:

[0022] Continue driving a set of two jacks I to push a set of two spreader beams I in stages to load a set of four temporary cables, and tighten the temporary cable anchorage I for anchoring; at the same time, drive a set of two jacks II to unload the cable force of the cable to be replaced in stages, so that the force system can be smoothly transferred from the cable to be replaced to a set of four temporary cables, until the cable to be replaced is unloaded to the stress of 0.

[0023] Furthermore, the specific operation of step S7 is as follows:

[0024] A set of two jacks (II) is driven to synchronously load the new cable force in stages, while a set of two jacks (I) is driven to synchronously push a set of two spreader beams (I) to unload a set of four temporary cables. This achieves a smooth transition of the force system from a set of four temporary cables to the new cable, until the pin hole on the side fork of the new cable node plate A is aligned with the pin hole on node plate A.

[0025] Furthermore, the specific operation of step S8 is as follows:

[0026] Install pin A, continue to drive a set of two jacks II to synchronously load the new cable force in stages, and at the same time drive a set of two jacks I to synchronously push a set of two spreader beams I to unload a set of four temporary cables until the temporary cables are unloaded to the stress level of 0, so that pin A can bear the force.

[0027] Furthermore, the reaction device A and the reaction device B have the same structure and both include a reaction seat, a connecting plate, an adjusting plate and a positioning component;

[0028] Step S1 includes the following specific steps:

[0029] S1.1 On node A or node B, at a point where the direction of the opposite cable to be replaced is in a straight line with the direction of the cable to be replaced, the positioning component is installed, avoiding the opposite cable, so that the positioning component is temporarily fixed on node A or node B.

[0030] S1.2 Install adjustment plates on the upper and lower sides of the positioning component to temporarily lock the positioning component;

[0031] S1.3 Install connecting plates on the upper and lower adjustment plates, adjust the connecting plate boss surface to be perpendicular to the center line of the cable to be replaced, and then fix the connecting plate.

[0032] S1.4 On the upper and lower connecting plates, install the reaction seat, avoiding the opposing cable, so that the reaction seat is connected with the connecting plate, adjusting plate and positioning component to form a whole, and complete the installation of reaction device A or reaction device B.

[0033] Furthermore, the positioning component includes a column, and the column is respectively provided with an adjusting screw, a column arc surface A, a column arc surface B, and a column arc surface C;

[0034] Step S1.1 includes the following specific steps:

[0035] S1.1.1 On node A or node B, at least two columns are installed in a straight line direction with the opposite cable of the cable to be replaced, avoiding the opposite cable, so that the arc surface C of each column is in contact with the outer wall of node A or node B.

[0036] S1.1.2 Adjust the two adjusting screws on the top and bottom of the column, and turn them upside down to the top and bottom sides of node plate A or node plate B, so that the column is temporarily fixed on node plate A or node plate B.

[0037] Furthermore, the connecting plate is provided with a connecting plate arc surface, and the adjusting plate is provided with arc-shaped distributed threaded holes and adjusting plate arc surface A;

[0038] Step S1.3 includes the following specific steps:

[0039] S1.3.1 Place connecting plates on the upper and lower adjustment plates respectively, so that the arc surface of the connecting plate fits against the arc surface A of the adjustment plate;

[0040] S1.3.2. Rotate along the outer wall of the adjusting plate to adjust the position of the connecting plate so that the connecting plate boss surface is perpendicular to the center line of the cable to be replaced.

[0041] S1.3.3. Use fastening bolts to thread the connecting plate through the bolt holes and the adjusting plate through the threaded holes to fix the connecting plate.

[0042] Furthermore, the reaction seat includes two fixed plates and two tension plates III;

[0043] Step S1.4 includes the following specific steps:

[0044] S1.4.1. Fix a fixing plate on each of the two connecting plates, so that the two fixing plates are erected in parallel on the upper and lower sides of the opposing cable;

[0045] S1.4.2. Fix the two tension plates III at both ends of the two fixed plates respectively, so that the two tension plates III are erected in parallel on the left and right sides of the opposing cable, so that the fixed plate, tension plate III, connecting plate, adjusting plate and positioning component are connected into a whole, and the installation of the reaction seat is completed.

[0046] Beneficial effects

[0047] Compared with the prior art, the advantages of this invention are as follows:

[0048] The method of the present invention allows for the installation of any node plate on the cable net without changing the stress on the original cable net and the cables on the node plate. It is not affected by the angle of the cables on the node plate, and the node plate provides reaction force support. It can be adjusted to face any cable to be replaced. It has little impact on the stress on the cable net structure and no damage to the cable net node plate and other cables. It has the characteristics of high efficiency and low construction cost. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the reaction seat in this invention;

[0050] Figure 2 This is a schematic diagram of the structure of one side of the front of the fixing plate in this invention;

[0051] Figure 3 This is a schematic diagram of the structure of one side of the back of the fixing plate of the present invention;

[0052] Figure 4 This is a schematic diagram of the structure of the bracing plate III in this invention;

[0053] Figure 5 This is a schematic diagram of the structure of the bracing plate I in this invention;

[0054] Figure 6 This is a schematic diagram of the structure of the bracing plate II in this invention;

[0055] Figure 7 This is a schematic diagram of one structure of the column in this invention;

[0056] Figure 8 This is a schematic diagram of another structure of the column in this invention;

[0057] Figure 9 This is a schematic diagram of one side of the adjusting plate in this invention;

[0058] Figure 10 This is a schematic diagram of the structure of the other side of the adjustment plate in this invention;

[0059] Figure 11 This is a schematic diagram of the locking assembly in this invention;

[0060] Figure 12 This is a schematic diagram of the reaction device in this invention;

[0061] Figure 13 This is a schematic diagram of one side of the structure when the present invention is applied;

[0062] Figure 14 This is a schematic diagram of the structure on the other side when the present invention is applied;

[0063] Figure 15 This is a schematic diagram of one side of the connecting plate in this invention;

[0064] Figure 16 This is a schematic diagram of the structure on the other side of the connecting plate in this invention;

[0065] Figure 17 This is a top view of the structure during the replacement of the spatial cable net in this invention;

[0066] Figure 18 This is a three-dimensional structural diagram of the space cable net during replacement in this invention;

[0067] Figure 19 for Figure 18 A magnified schematic diagram of the structure at point K.

[0068] Wherein: 1-Column, 1.1-Column arc surface A, 1.2-Column arc surface B, 1.3-Column arc surface C, 1.4-Clamping seat, 1.5-Limiting shoulder, 1.6-Reinforcing plate, 2-Adjusting screw, 3-Adjusting plate, 3.1-Adjusting plate arc surface A, 3.2-Adjusting plate arc surface B, 3.3-Adjusting plate arc surface C, 4-Connecting plate, 4.1-Connecting plate arc surface, 4.2-Connecting plate boss surface, 5-Tie plate III, 6-Fixing plate, 6.1-Fixing plate groove surface, 6.2-Temporary cable hole, 6.3-Positioning hole, 6.4-First through hole, 6.5-First countersunk groove, 7-Tie plate II, 8-Tie plate I, 10-Opposing cable, 10.1-Cable to be replaced, 11-Temporary cable, 12-Allowing hole 13-Fasting bolt, 14-Boss, 15-Groove, 16-Card holder, 17-Threaded hole, 18-Adjusting screw hole, 19-Adjusting groove, 20-Bolt hole, 21-Node plate A, 21'-Node plate B, 22-Reaction device B, 22'-Reaction device A, 23-Pin B, 23'-Pin A, 24-Temporary cable anchor I, 25-Spreader beam I, 26-Temporary cable anchor II, 27-Spreader beam II, 28-Short tie rod, 29-Short tie rod anchor I, 30-Short tie rod anchor II, 31-Jack I, 32-Long tie rod, 33-Long tie rod anchor I, 34-Long tie rod anchor II, 35-Long tie rod anchor III, 36-Spreader beam III, 37-Jack II, 38-Two-half cable clamp. Detailed Implementation

[0069] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0070] See Figure 1-19

[0071] A method for replacing the cable net in a spatial cable net structure, the method comprising the following steps:

[0072] S1. Install reaction device A22' on node A21 and reaction device B22 on node B21';

[0073] S2. Install temporary cable 11 and force conversion system between reaction device A22' and reaction device B22;

[0074] S3. Transfer the force system of the side fork-type anchor pin A23' of the node plate A21 of the cable to be replaced 10.1 to the temporary cable 11, so that the pin A23' of the cable to be replaced 10.1 is not under force, and remove the pin A23'.

[0075] S4. Continue to transfer the force system of the cable to be replaced 10.1 to the temporary cable 11 until the stress of the cable to be replaced 10.1 is unloaded to 0.

[0076] S5. Release pin B23 and remove cable 10.1 to be replaced;

[0077] S6. Install the new cable and insert pin B23;

[0078] S7. Transfer the force system of temporary cable 11 to the new cable until the side fork pin hole of the new cable node plate A21 is aligned with the pin hole of node plate A21.

[0079] S8. Install pin A23' and continue to transfer the force system of temporary cable 11 to the new cable until the temporary cable 11 is unloaded to the stress level of 0, so that pin A23' is under stress.

[0080] S9. Complete the cable replacement and remove temporary cable 11, force conversion system, reaction device A22', and reaction device B22.

[0081] The specific operation of step S2 is as follows:

[0082] At node A21, a fork-type anchorage is installed at one end of the cable to be replaced, and a two-part cable clamp 38 is installed. A set of four temporary cables 11 and two sets of eight temporary cable anchorages I24 connect the reaction device A22' and the reaction device B22. The set of four temporary cables 11 simultaneously passes through a set of two spreader beams I25, a set of four temporary cable anchorages II26, and a set of two spreader beams II27. A set of eight short tie rods 28, a set of eight short tie rod anchorages I29, and a set of eight short tie rod anchorages II30 connect the reaction device A22' and a set of… Two spreader beams II27 and a set of eight short tie rods 28 pass through a set of two spreader beams I25 simultaneously; a set of two jacks I31 is set between the set of two spreader beams I25 and the set of two spreader beams II27; a set of two spreader beams II27 and a set of one spreader beam III36 are connected by a set of four long tie rods 32, a set of four long tie rod anchors I33, a set of four long tie rod anchors II34, and a set of four long tie rod anchors III35; a set of two jacks II37 is set between spreader beam III36 and the two-half cable clamp 38.

[0083] The specific operation of step S3 is as follows:

[0084] Drive a set of two jacks I31 to push a set of two spreader beams I25 in stages to load a set of four temporary cables 11 and tighten the temporary cable anchor I24 for anchoring; at the same time drive a set of two jacks II37 to push a spreader beam III36 in stages until the force system of the side fork-type anchor pin A23' of the node plate A21 of the cable to be replaced 10.1 is transferred to a set of four temporary cables 11, so that the pin A23' is not under force, and then the pin A23' is removed.

[0085] The specific operation of step S4 is as follows:

[0086] Continue driving a set of two jacks I31 to push a set of two spreader beams I25 in stages to load a set of four temporary cables 11, and tighten the temporary cable anchors I24 for anchoring; at the same time, drive a set of two jacks II37 to unload the cable force of the cable to be replaced 10.1 in stages. The entire process of this force system conversion takes the cable force and displacement of the node plate as the main control target, so as to achieve a smooth conversion of the force system from the cable to be replaced 10.1 to a set of four temporary cables 11, until the cable to be replaced 10.1 is unloaded to the stress of 0.

[0087] The specific operation of step S7 is as follows:

[0088] A set of two jacks II37 is driven to synchronously load the new cable force in stages, while a set of two jacks I31 is driven to synchronously push a set of two spreader beams I25 in stages to unload a set of four temporary cables 11. The entire force system conversion process takes the cable force and displacement of the node plate as the main control target, so as to achieve a smooth conversion of the force system from a set of four temporary cables 11 to the new cable. The force state and relative position of node plate A22 and node plate B22' meet the control allowable change range throughout the entire force system conversion process, until the side fork ear pin hole of the new cable node plate A21 is aligned with the pin hole of node plate A21.

[0089] The specific operation of step S8 is as follows:

[0090] Install pin A23', continue to drive a set of two jacks II37 to synchronously load the new cable force in stages, and at the same time drive a set of two jacks I31 to synchronously push a set of two spreader beams I25 to unload a set of four temporary cables 11 until the temporary cables 11 are unloaded to the stress of 0, so that pin A23' can bear the force.

[0091] In this embodiment, the reaction device A22' and the reaction device B22 have the same structure, and both include a reaction seat, a connecting plate 4, an adjusting plate 3 and a positioning component;

[0092] Step S1 includes the following specific steps:

[0093] S1.1 On node disk A21 or node disk B21', in the direction of the opposite cable 10 of the cable to be replaced 10.1, in a straight line direction with the cable to be replaced 10.1, install the positioning component, avoiding the opposite cable 10, so that the positioning component is temporarily fixed on node disk A21 or node disk B21'.

[0094] S1.2 Install adjustment plates 3 on the upper and lower sides of the positioning component to temporarily lock the positioning component;

[0095] S1.3 Install connecting plates 4 on the upper and lower adjusting plates 3, adjust the connecting plate boss surface 4.2 of the connecting plate 4 to be perpendicular to the center line of the cable to be replaced 10.1, and then fix the connecting plate 4.

[0096] S1.4 On the upper and lower connecting plates 4, avoid the opposing cable 10 and install the reaction seats so that the reaction seats are connected with the connecting plates 4, the adjusting plates 3 and the positioning components to form a whole, thus completing the construction of the reaction system.

[0097] Preferably, the positioning component includes a column 1, on which an adjusting screw 2, a column arc surface A1.1, a column arc surface B1.2, and a column arc surface C1.3 are respectively provided; step S1.1 includes the following specific steps:

[0098] S1.1.1 On node plate A21 or node plate B21', at a point in the direction of the opposite cable 10 of the cable to be replaced 10.1, in a straight line with the opposite cable 10.1, at least two posts 1 are installed, avoiding the opposite cable 10, so that the arc surface C1.3 of each post 1 fits against the outer wall of node plate A21 or node plate B21'. For different specifications of cables on different node plates A21 or node plate B21', 2-4 posts 1 can be installed according to the different forces on the cable to be replaced 10.1 and the different offset angles with the opposite cable 10.

[0099] S1.1.2 Adjust the two adjusting screws 2 on the top and bottom of the column 1, and turn them upside down to the top and bottom sides of the node plate A21 or node plate B21', so that the column 1 is temporarily fixed on the node plate A21 or node plate B21', which can temporarily fix the node plate A21 or node plate B21' of different thicknesses.

[0100] Preferably, in step S1.1.1, at least one column 1 is installed at equidistant points on both sides of the centerline of the cable to be replaced 10.1, making the reaction system more stable. The preferred installation positions of the columns 1 are on both sides of the centerline of the cable to be replaced 10.1. However, due to spatial angles, equidistant installation cannot be achieved in practice, but equidistant installation should be considered as the ideal state.

[0101] Preferably, each of the two adjusting plates 3 has an arc-shaped adjusting groove 19 on one of its opposite sides. Step S1.2 includes the following specific steps:

[0102] S1.2.1. Fit the adjustment groove 19 of the adjustment plate 3 onto the upper and lower sides of all the columns 1, so that the adjustment plate arc surface B3.2 and adjustment plate arc surface C3.3 in the adjustment groove 19 are respectively in contact with the column arc surface A1.1 and column arc surface B1.2 of the column 1, so as to facilitate the adjustment of the position of the adjustment plate 3 relative to the column 1 around the center of the node plate A21 or the node plate B21'.

[0103] S1.2.2 Rotate along the adjustment groove 19 to adjust the position of the adjustment plate 3 so that the bolt hole 20 on the adjustment plate 3 is aligned with the corresponding threaded hole 17 on the top of the column 1, so that the adjustment plate 3 can be installed quickly.

[0104] S1.2.3. Use the fastening bolt 13 to thread it through the bolt hole 20 of the adjusting plate 3 and connect it to the threaded hole 17 at the top of the column 1 to temporarily lock the column 1.

[0105] Preferably, the connecting plate 4 is provided with a connecting plate arc surface 4.1, and the adjusting plate 3 is provided with arc-shaped distributed threaded holes 17 and an adjusting plate arc surface A3.1, wherein step S1.3 includes the following specific steps:

[0106] S1.3.1 Place connecting plates 4 on the upper and lower adjusting plates 3 respectively, so that the arc surface 4.1 of the connecting plate fits against the arc surface A3.1 of the adjusting plate, so that the position of the connecting plate 4 can be adjusted around the center of the node plate A21 or the node plate B21'.

[0107] S1.2.2. Rotate along the outer wall of the adjusting plate 3 to adjust the position of the connecting plate 4 so that the connecting plate boss surface 4.2 of the connecting plate 4 is perpendicular to the center line of the cable to be replaced 10.1, ensuring that the reaction force provided by the reaction system is consistent with the cable to be replaced 10.1;

[0108] S1.2.3. Use fastening bolts 13 to thread them through the bolt holes 20 of the connecting plate 4 and the threaded holes 17 of the adjusting plate 3 to fix the connecting plate 4, making it easy to disassemble and assemble.

[0109] Preferably, in step S1.2.2, if adjusting the position of the connecting plate 4 along the outer wall of the adjusting plate 3 fails to make the connecting plate boss surface 4.2 of the connecting plate 4 perpendicular to the center line of the cable to be replaced 10.1, then the connection between the adjusting plate 3 and the column 1, and between the column 1 and the node plate A21 or node plate B21', is loosened, and the position of the column 1 relative to the node plate A21 or node plate B21' is readjusted until the connecting plate boss surface 4.2 of the connecting plate 4 is perpendicular to the center line of the cable to be replaced 10.1. Then the adjusting plate 3 is connected and fixed to the column 1, and between the column 1 and the node plate A21 or node plate B21', so as to facilitate adjusting the connecting plate boss surface 4.2 of the connecting plate 4 to be perpendicular to the center line of the cable to be replaced 10.1.

[0110] Preferably, the reaction seat includes two fixed plates 6 and two tension plates Ⅲ5, wherein step S1.4 includes the following specific steps:

[0111] S1.4.1 Fix a fixing plate 6 on each of the two connecting plates 4, so that the two fixing plates 6 are erected in parallel on the upper and lower sides of the opposing cable 10, cleverly avoiding the opposing cable 10.

[0112] S1.4.2. Fix the two tension plates Ⅲ5 at both ends of the two fixed plates 6 respectively, so that the two tension plates Ⅲ5 are erected in parallel on the left and right sides of the opposing cable 10, cleverly avoiding the opposing cable 10, so that the fixed plate 6, tension plate Ⅲ5, connecting plate 4, adjusting plate 3 and positioning component are connected into a whole, and the reaction force system is constructed.

[0113] Preferably, the reaction seat further includes at least one tension plate I 8 and tension plate II 7. Step S1.4 further includes step S1.4.3, where tension plate I 8 and tension plate II 7 are installed on the rear side of the two fixing plates 6, avoiding the opposing cable 10, which can strengthen the reaction seat and improve the stability of cable net replacement.

[0114] Preferably, in step S1.4.3, at least one tension plate I8 or tension plate II7 is installed at equidistant points on both sides of the opposing cable 10, so that the tension of the two fixed plates 6 is more balanced by the tension of tension plates I8 and II7. In practical applications, the installation positions of tension plates I8 and II7 are adjusted according to the different angles between the opposing cable 10 and the cable to be replaced 10.1 where the device is installed. It is preferred to be located on both sides of the center line of the cable to be replaced 10.1. Among them, tension plate II7 can be moved left and right to avoid the opposing cable 10. When tension plate I8 cannot avoid the opposing cable 10, one side can be omitted and tension plate II7 can be offset to a position where tension plate I8 cannot be installed.

[0115] Preferably, the bracing plates I8, II7, and III5 are all connected to the fixing plate 6 by means of a slot 15 and a boss 14 and a fastening bolt 13, which can reduce the shear force on the fastening bolt 13 and improve the structural strength of the reaction seat.

[0116] The replacement method of the present invention allows for the installation of any node plate on the cable net without changing the stress on the cables on the original cable net and node plate. It is not affected by the angle of the cables on the node plate, and can be adjusted to face any cable to be replaced. The node plate provides reaction force support, which has little impact on the stress on the cable net structure and no damage to the cable net node plate and other cables. It has the characteristics of high efficiency and low construction cost, and can quickly build a reaction force system on the node plate to realize the replacement of spatial cable net.

[0117] A force conversion device for replacing a spatial cable net includes a reaction device A22' and a reaction device B22. The reaction device B22 is installed on one side of the node plate B21', and the reaction device A22' is installed on one side of the node plate A21. At least two temporary cables 11 distributed around the cable to be replaced 10.1 are erected between the reaction devices A22' and B22. A spreader beam II27 sleeved on the temporary cable 11 is connected to the reaction device A22' via a short tie rod 28. The spreader beam II27 is provided with a first drive mechanism for loading or unloading the cable force of the temporary cable 11. The side of the spreader beam II27 away from the reaction device A22' is connected to a spreader beam III36 sleeved on the cable to be replaced 10.1 via a long tie rod 32. The spreader beam III36 is provided with a second drive mechanism for unloading the cable force of the cable to be replaced 10.1 or loading the cable force of the new cable.

[0118] One end of the short tie rod 28 is connected to the reaction device A22' via a short tie rod anchor I 29, and the other end of the short tie rod 28 is connected to the spreader beam II 27 via a short tie rod anchor II 30; one end of the long tie rod 32 is connected to the spreader beam II 27 via long tie rod anchor I 33 and long tie rod anchor II 34, and the other end of the long tie rod 32 is connected to the spreader beam III 36 via a long tie rod anchor III 35.

[0119] The first driving mechanism includes a jack I31, a spreader beam I25, a temporary cable anchor I24, and a temporary cable anchor II26. The jack I31 is installed on the side of the spreader beam II27 facing the reaction device A22'. The spreader beam I25 is sleeved on the temporary cable 11 and the short tie rod 28, and the output end of the jack I31 is connected to the spreader beam I25. The temporary cable anchor II26 is installed on the temporary cable 11 and is located on the side of the spreader beam I25 away from the jack I31. The temporary cable anchor I24 is installed on the temporary cable 11 and is located on the side of the reaction device A22' away from the spreader beam I25.

[0120] The second drive mechanism includes jack II 37 and cable clamp. Jack II 37 is mounted on the side of the spreader beam III 36 facing the node plate A21. The cable clamp is mounted on the cable to be replaced 10.1. The output end of jack II 37 is connected to the cable clamp.

[0121] The cable clamp is a two-part cable clamp 38, which is convenient for disassembly and assembly.

[0122] Temporary cables 11 are arranged in groups of 4, and the 4 temporary cables 11 are evenly distributed around the cable to be replaced 10.1, and are located on the upper and lower sides of the node plate A21 respectively; short tie rods 28 are arranged in groups of 8, spreader beams II 27 are arranged in groups of 2, long tie rods 32 are arranged in groups of 4, spreader beams III 36 are arranged in groups of 1, and the first drive mechanism and the second drive mechanism are each arranged in groups of 2, and the first drive mechanism and the second drive mechanism are symmetrically arranged on the upper and lower sides of the node plate A21 respectively.

[0123] A reaction device for replacing a space cable net includes a hollow reaction seat and a locking assembly, with two connecting plates 4 arranged symmetrically on the front of the reaction seat.

[0124] Preferably, the reaction seat includes two fixed plates 6 and two tension plates III5. One tension plate III5 has two ends detachably connected to one end of each of the two fixed plates 6, and the other tension plate III5 has two ends detachably connected to the other ends of each of the two fixed plates 6. The tension plates III5 tighten and fix the two fixed plates 6. The area enclosed between the two fixed plates 6 and the two tension plates III5 forms a clearance hole 12 to avoid interference between the opposing cable 10 and the reaction seat, creating a hollow reaction seat. At least one tension plate I8 and tension plate II7 are detachably provided between the back sides of the two fixed plates 6 to further tighten and fix the two fixed plates 6, improving the structural strength of the reaction seat. Furthermore, the back of both fixed plates 6 is equipped with an adjustment structure for adjusting the position of the tension plate I 8 and tension plate II 7. Through the design of the adjustment structure, the position of tension plate I and tension plate II can be moved during the installation of the reaction seat to avoid any opposing cable 10, thereby ensuring that the reaction seat will not interfere with the opposing cable when it is installed at any position of node plate A21 or node plate B21'.

[0125] The reaction seat in this embodiment adopts a split-type reaction seat structure, which can quickly install the reaction seat at different positions of the node plate to realize the replacement of all cables of the space cable net.

[0126] Furthermore, the fixed plate 6 is connected to the bracing plates III5, II7, and I8 by at least one fastening bolt 13, which realizes the detachable connection between the fixed plate 6 and the bracing plates III5, II7, and I8, and also makes disassembly and assembly convenient.

[0127] Furthermore, both ends of the fixing plate 6 are provided with bosses 14, and both ends of the bracing plate III 5 are provided with grooves 15. The bosses 14 and grooves 15 are adapted to each other, and the bosses 14 are engaged in the grooves 15 to form axial limiting. Similarly, both ends of the bracing plate II 7 are provided with retaining seats 16. The retaining seats 16 are structures that protrude along the thickness direction of the bracing plate II 7. The two retaining seats 16 are respectively engaged on the upper and lower sides of the fixing plate 6 to form axial limiting. Each fixing plate 6 is also provided with a first through hole 6.4, which can reduce the weight of the reaction seat, facilitate the removal of the reaction seat, and enhance the structural strength of the reaction seat. The back and front of the fixing plates 6 on both sides of the first through hole 6.4 are provided with first grooves 6.5, which can reduce the weight of the reaction seat, enhance the structural strength of the reaction seat, and facilitate the installation of anchors when the cable net is replaced. Multiple threaded holes 17 are provided on the fixing plates 6 on the opposite side of the two first through holes 6.4, which facilitates the installation of connecting plates 4. Temporary cable holes 6.2 are provided in the first grooves 6.5, which facilitate the installation of temporary cables when the cable net is replaced. Two grooves 15 are also provided in the middle of the bracing plate II 7. The boss 14 formed by the bottom of the first through hole 6.4 and the bottom of the fixing plate 6 is engaged in the groove 15 to form an axial limit. The bracing plate II 7 adopts the cooperation and limit of the two bosses 14 and the grooves 15 to further improve the installation stability of the bracing plate II 7. Similarly, the length of the tension plate I8 is shorter than that of the tension plate II7, resulting in different fixing positions for tension plate I8 and the fixing plate 6, and different stress points, which further improves the structural strength of the reaction seat. Grooves 15 are provided at both ends of tension plate I8, and the boss 14 formed by the bottom of the first recess 6.5 and the bottom of the fixing plate 6 engages within the groove 15, forming an axial limit. In this embodiment, tension plates I8, II7, and III5 are all fixedly connected to the fixing plate 6 using fastening bolts 13 and the combination of the boss 14 and groove 15, which further improves the structural strength of the reaction seat, thereby ensuring the safety and reliability of the space cable net replacement.

[0128] Furthermore, the adjustment structure includes multiple adjusting screw holes 18, which are evenly distributed along the axial direction of the fixed plate 6. The number of adjusting screw holes 18 is greater than the number of corresponding fastening bolts 13 between the fixed plate 6 and the bracing plates II 7 and I 8, and the fastening bolts 13 pass through the bracing plates II 7 and I 8 and are threadedly connected to the adjusting screw holes 18. When replacing the cable net, the fastening bolts 13 can be loosened, and the positions of the bracing plates II 7 and I 8 can be moved left and right to avoid the opposing cable 10. When the bracing plate I 8 cannot avoid the opposing cable 10, one side can be installed separately, and the bracing plate II 7 can be offset to a position where the bracing plate I 8 cannot be installed. The operation is very flexible.

[0129] Furthermore, each fixing plate 6 has at least two positioning holes 6.3 at both ends for installing the short pull rod of the replacement device.

[0130] Furthermore, each of the two fixing plates 6 has a fixing plate groove surface 6.1 on one of its opposite sides to facilitate the positioning and installation of the connecting plate 4.

[0131] Preferably, the locking assembly includes two adjusting plates 3, which are arranged symmetrically with an upper and lower gap. The two adjusting plates 3 are detachably installed at the ends of the two connecting plates 4 away from the reaction seat. A positioning component for positioning node A21 or node B21' is provided between the two adjusting plates 3, which can slide circumferentially along node A21 or node B21'. A locking structure for locking the positioning component is provided between the positioning component and the adjusting plates 3.

[0132] In this embodiment, the locking assembly uses a detachable locking assembly to lock the positioning assembly. During installation, the two adjusting plates 3 are directly placed on the positioning assembly, and then the locking structure is used to lock the two adjusting plates 3. During disassembly, the locking structure is loosened, the two adjusting plates 3 are removed, and the position of the positioning assembly can be adjusted. The disassembly and assembly are very convenient, and the reaction force system can be quickly transferred to different positions of the node plate, effectively improving construction efficiency.

[0133] Preferably, each of the two adjusting plates 3 has an arc-shaped adjusting groove 19 on one opposite side. The two sides of the adjusting groove 19 are the adjusting plate arc surface B3.2 and the adjusting plate arc surface C3.3, respectively. The adjusting plate arc surface B3.2 and the adjusting plate arc surface C3.3 are both concentrically arranged with the node disk A21 or the node disk B21'. The positioning component is slidably installed between the two adjusting grooves 19. The adjusting plate 3 is an arc-shaped plate, and the two sides of each adjusting plate 3 are the adjusting plate arc surface A3.1, which is concentrically arranged with the node disk A21 or the node disk B21'. The adjusting plate arc surface A3.1, the adjusting plate arc surface B3.2, and the adjusting plate arc surface C3.3 are all concentric with the node disk A21 or the node disk B21', and do not change due to the change of the outer diameter of the node disk A21 or the node disk B21', thus improving versatility. It also allows the positioning component to slide circumferentially along the node disk A21 or the node disk B21' when it is not locked.

[0134] Furthermore, multiple threaded holes 17 are provided on the adjusting plate 3 on one side of the adjusting groove 19 for connection with the fastening bolts 13 corresponding to the connecting plate 4. The multiple threaded holes 17 are evenly distributed along the circumferential direction of the adjusting groove 19, which can match the shape of the adjusting plate 3 well. The number of threaded holes 17 on the adjusting groove 19 is greater than the number of corresponding fastening bolts 13 between the connecting plate 4 and the adjusting plate 3, which facilitates the adjustment of the position of the connecting plate 4 relative to the adjusting plate 3.

[0135] Furthermore, the locking structure includes multiple fastening bolts 13, each of which passes through the adjusting plate 3 and is threadedly connected to the positioning component. The use of fastening bolts 13 enables quick assembly and disassembly. Specifically, multiple bolt holes 20 are provided on the adjusting plate 3 corresponding to the adjusting groove 19. The number of bolt holes 20 is greater than the number of fastening bolts 13, and the bolt holes 20 are evenly distributed along the circumferential direction of the adjusting groove 19. The bolt holes 20 are arranged in an arc shape, ensuring locking of the positioning component when adjusting its position.

[0136] Preferably, the positioning component includes at least two separately arranged columns 1. The column 1 is a fan-shaped body with a width that gradually increases from the inside to the outside, which can improve the structural strength of the column 1. Each column 1 has two clamping seats 1.4 arranged symmetrically on its inner side. Each clamping seat 1.4 is threaded with an adjusting screw 2. There is a column arc surface C1.3 between the two clamping seats 1.4 corresponding to each column 1. The column arc surface C1.3 is adapted to the outer diameter of the node plate A21 or node plate B21', so that the column 1 can fit well against the outer wall of the node plate A21 or node plate B21'.

[0137] The positioning component in this embodiment adopts a structure of multiple split columns 1 and column arc surfaces C1.3. During installation, the position of the columns 1 can be adjusted to accommodate different cable angles on node plate A21 or node plate B21'. Even when there is a spatial angle between the cable to be replaced and the opposing cable, the opposing cable 10 can still be avoided, and the angle can be accurately adjusted to quickly position and clamp the reaction force system onto the node plate. Furthermore, the node plate is clamped by two adjusting screws, which can be used to position and clamp node plates A21 or B21' of different thicknesses.

[0138] Furthermore, the concave surface C1.3 of the column is set on the inner side of the column 1 to form two limiting shoulders 1.5. The height of the column surface C1.3 is greater than or equal to the thickness of the node plate A21 or the node plate B21', ensuring that the column 1 can be locked on the outer wall of the node plate A21 or the node plate B21'. At the same time, the design of the limiting shoulders 1.5 can play the role of axial limiting of the node plate A21 or the node plate B21'.

[0139] Furthermore, each end of column 1 has an inner curved surface B1.2, which is concentrically arranged with node plate A21 or node plate B21'. Each end of column 1 also has an outer curved surface A1.1, which is concentrically arranged with node plate A21 or node plate B21'. The curved surface A1.1 is compatible with the curved surface C3.3 of the adjusting plate, and the curved surface B1.2 is compatible with the curved surface B3.2 of the adjusting plate. In this embodiment, the column arc surface C1.3 is adapted to the outer diameter of the node plate A21 or the node plate B21', and the column arc surface B1.2 and the column arc surface A1.1 can be inserted into the adjustment groove 19 and match the adjustment plate arc surface B3.2 and the adjustment plate arc surface C3.3, which play a guiding role in the rotation of the column 3. During the installation process, the column rotates around the center of the node plate A21 or the node plate B21', which makes the position adjustment of the column 1 more convenient without affecting the positioning accuracy.

[0140] Furthermore, the concave surface B1.2 of the column is set on the inner side of the column 1 to form a limiting shoulder 1.5. The concave surface A1.1 of the column is set on the outer side of the column 1 to form a limiting shoulder 1.5. The design of the limiting shoulder 1.5 can play a role in limiting the axial movement of the column 1.

[0141] Furthermore, the width of the limiting shoulder 1.5 corresponding to the arc surface B1.2 of the column is greater than the height of the arc surface B1.2 of the column, which can arrange the clamping seat 1.4 as far forward as possible. This ensures that the adjusting screw 2 clamps the node plate A21 or node plate B21', and can be used to clamp node plates A21 or B21' with different structures.

[0142] Furthermore, each column 1 has at least one threaded hole 17 at both ends, and the fastening bolt 13 passes through the adjusting plate 3 and is threadedly connected to the threaded hole 17, so as to realize the fixed installation of the adjusting plate 3 and the column 1.

[0143] Furthermore, each clamping seat 1.4 is provided with a reinforcing plate 1.6 between its two sides and the inner side of the column 1, which can improve the structural strength of the clamping seat 1.4 and prevent it from breaking.

[0144] Preferably, the connecting plate 4 is connected to the fixing plate 6 and the adjusting plate 3 by multiple fastening bolts 13. Both ends of the connecting plate 4 have multiple bolt holes 20. The fastening bolts 13 pass through the bolt holes 20 and are threaded into the corresponding threaded holes 17 of the fixing plate 6 and the adjusting plate 3, thus achieving the fixed installation of the connecting plate 4. Each of the two fixing plates 6 also has a fixing plate groove surface 6.1 on one side, and a connecting plate boss surface 4.2 on one side, with the fixing plate groove surface 6.1 fitting against the connecting plate boss surface 4.2. The other side of each connecting plate 4 has a connecting plate arc surface 6.1, which fits against the outer surface of the adjusting plate 3. Fastening with the fastening bolts 13, and using the fixing plate groove surface 6.1 and the connecting plate boss surface 4.2 for positioning, and the connecting plate arc surface 4.1 and the outer surface of the adjusting plate 3 for positioning, allows for quick alignment of the bolt holes and threaded holes, making installation more convenient and improving the reliability of the connecting plate 4 installation.

[0145] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A method for replacing the cable net in a spatial cable net structure, characterized in that, The replacement method includes the following steps: S1. Install reaction device A (22') on node A (21) and reaction device B (22) on node B (21'). S2. Install a temporary cable (11) and a force conversion system between reaction device A (22') and reaction device B (22); S3. Transfer the force system of the fork-type anchor pin A (23') of the node plate A (21) of the cable to be replaced (10.1) to the temporary cable (11) so that the pin A (23') of the cable to be replaced (10.1) is not under force, and remove the pin A (23'). S4. Continue to transfer the force system of the cable to be replaced (10.1) to the temporary cable (11) until the cable to be replaced (10.1) is unloaded to the point of zero stress. S5. Release pin B (23) and remove the cable to be replaced (10.1). S6. Install the new cable and insert pin B (23). S7. Transfer the force system of the temporary cable (11) to the new cable until the side fork pin hole of the new cable node plate A (21) is aligned with the pin hole of the node plate A (21); S8. Install pin A (23') and continue to transfer the force system of the temporary cable (11) to the new cable until the temporary cable (11) is unloaded to the stress level of 0, so that pin A (23') is under stress. S9. Complete the cable replacement and remove the temporary cable (11), force conversion system, reaction device A (22'), and reaction device B (22). The reaction device A (22') and reaction device B (22) have the same structure and both include a reaction seat, a connecting plate (4), an adjusting plate (3) and a positioning component; Step S1 includes the following specific steps: S1.1 On node A (21) or node B (21'), in the direction of the opposite cable (10) of the cable to be replaced (10.1) and in a straight line with the cable to be replaced (10.1), install a positioning component to avoid the opposite cable (10) so that the positioning component is temporarily fixed on node A (21) or node B (21'); S1.2 Install adjustment plates (3) on the upper and lower sides of the positioning component to temporarily lock the positioning component; S1.3 Install connecting plates (4) on the upper and lower adjusting plates (3), adjust the connecting plate boss surface (4.2) of the connecting plate (4) to be perpendicular to the center line of the cable to be replaced (10.1), and then fix the connecting plate (4); S1.4 On the upper and lower connecting plates (4), avoid the opposite cable (10) and install the reaction seat so that the reaction seat is connected with the connecting plate (4), the adjusting plate (3) and the positioning component to form a whole, and complete the installation of the reaction device A (22') or the reaction device B (22); The connecting plate (4) is provided with a connecting plate arc surface (4.1), and the adjusting plate (3) is provided with an arc-shaped distributed threaded hole (17) and an adjusting plate arc surface A (3.1). Step S1.3 includes the following specific steps: S1.3.1 Place connecting plates (4) on the upper and lower adjusting plates (3) respectively, so that the arc surface (4.1) of the connecting plate is in contact with the arc surface A (3.1) of the adjusting plate; S1.3.

2. Rotate along the outer wall of the adjusting plate (3) to adjust the position of the connecting plate (4) so ​​that the connecting plate boss surface (4.2) of the connecting plate (4) is perpendicular to the center line of the cable to be replaced (10.1); S1.3.

3. Use a fastening bolt (13) to thread it through the bolt hole (20) of the connecting plate (4) and the threaded hole (17) of the adjusting plate (3) to fix the connecting plate (4).

2. The method for replacing the cable net in a spatial cable net structure according to claim 1, characterized in that, The specific operation of step S2 is as follows: Install a two-part cable clamp (38) on one end of the cable to be replaced (10.1) at node plate A (21); connect reaction device A (22') and reaction device B (22) through a set of 4 temporary cables (11) and two sets of 8 temporary cable anchors I (24); the set of 4 temporary cables (11) passes through a set of 2 spreader beams I (25), a set of 4 temporary cable anchors II (26) and a set of 2 spreader beams II (27); connect reaction device A (22') and a set of 8 short tie rods (28), a set of 8 short tie rod anchors I (29) and a set of 8 short tie rod anchors II (30). Two flat beams II (27) and a set of eight short tie rods (28) pass through a set of two flat beams I (25); a set of two jacks I (31) is set between a set of two flat beams I (25) and a set of two flat beams II (27); a set of two flat beams II (27) and a set of one flat beam III (36) are connected by a set of four long tie rods (32), a set of four long tie rod anchors I (33), a set of four long tie rod anchors II (34), and a set of four long tie rod anchors III (35); a set of two jacks II (37) is set between flat beam III (36) and the two-half cable clamp (38).

3. The method for replacing the cable net in a spatial cable net structure according to claim 2, characterized in that, The specific operation of step S3 is as follows: Drive a set of two jacks I (31) to push a set of two spreader beams I (25) in stages to load a set of four temporary cables (11) and tighten the temporary cable anchor I (24) for anchoring; at the same time drive a set of two jacks II (37) to push a spreader beam III (36) in stages until the force system of the side fork-type anchor pin A (23') of the node plate A (21) of the cable to be replaced (10.1) is transferred to a set of four temporary cables (11), so that the pin A (23') is not under force, and remove the pin A (23').

4. The method for replacing the cable net in a spatial cable net structure according to claim 2, characterized in that, The specific operation of step S4 is as follows: Continue to drive a set of two jacks I (31) to push a set of two spreader beams I (25) in stages to load a set of four temporary cables (11) and tighten the temporary cable anchor I (24) for anchoring; at the same time, drive a set of two jacks II (37) to unload the cable force of the cable to be replaced (10.1) in stages, so that the force system can be smoothly transferred from the cable to be replaced (10.1) to a set of four temporary cables (11) until the cable to be replaced (10.1) is unloaded to the stress of 0.

5. The method for replacing the cable net in a spatial cable net structure according to claim 2, characterized in that, The specific operation of step S7 is as follows: Drive a set of two jacks II (37) to load the new cable force in stages and simultaneously drive a set of two jacks I (31) to push a set of two spreader beams I (25) in stages and simultaneously unload a set of four temporary cables (11), so that the force system can be smoothly transferred from a set of four temporary cables (11) to the new cable until the side fork pin hole of the new cable node plate A (21) is aligned with the pin hole of the node plate A (21).

6. The method for replacing the cable net in a spatial cable net structure according to claim 2, characterized in that, The specific operation of step S8 is as follows: Install pin A (23'), continue to drive a set of two jacks II (37) to load the new cable force in stages and synchronously, and at the same time drive a set of two jacks I (31) to push a set of two spreader beams I (25) in stages and synchronously to unload a set of four temporary cables (11) until the temporary cables (11) are unloaded to the stress of 0, so that pin A (23') is stressed.

7. The method for replacing the cable net in a spatial cable net structure according to claim 1, characterized in that, The positioning component includes a column (1), and the column (1) is respectively provided with an adjusting screw (2), a column arc surface A (1.1), a column arc surface B (1.2), and a column arc surface C (1.3). Step S1.1 includes the following specific steps: S1.1.1 On node A (21) or node B (21'), at a point in the direction of the opposite cable (10) of the cable to be replaced (10.1) and in a straight line with the cable to be replaced (10.1), at least two columns (1) are installed away from the opposite cable (10), so that the column arc surface C (1.3) of each column (1) fits against the outer wall of node A (21) or node B (21'); S1.1.2 Adjust the two adjusting screws (2) on the top and bottom of the column (1) and turn them upside down on the top and bottom sides of the node plate A (21) or node plate B (21') so that the column (1) is temporarily fixed on the node plate A (21) or node plate B (21').

8. The method for replacing the cable net in a spatial cable net structure according to claim 1, characterized in that, The reaction seat includes two fixed plates (6) and two tension plates III (5); Step S1.4 includes the following specific steps: S1.4.

1. Fix a fixing plate (6) on each of the two connecting plates (4) so ​​that the two fixing plates (6) are erected in parallel on the upper and lower sides of the opposing cable (10); S1.4.2 Fix the two tension plates III (5) at both ends of the two fixed plates (6) respectively, so that the two tension plates III (5) are erected in parallel on the left and right sides of the opposing cable (10), so that the fixed plate (6), tension plate III (5), connecting plate (4), adjusting plate (3) and positioning component are connected into a whole, and the installation of the reaction seat is completed.

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