A cable installation rack and a cable-stayed bridge main tower using the same

Abstract

The application provides a stay cable mounting rack and a cable-stayed bridge main tower using the stay cable mounting rack. The stay cable mounting rack comprises a bracket, a first clamping groove is arranged at the top edge of the bracket, a plurality of sliding seat assemblies are arranged in the first clamping groove, the sliding seat assemblies can slide along the first clamping groove and can be locked by bolts, and a hanging lug is fixedly arranged on the sliding seat assembly. The bottom of the groove wall of the first clamping groove close to the center of the bracket is recessed inward to form a clamping groove, the sliding seat assembly is provided with a clamping block corresponding to the clamping groove, one end of the clamping block extends into the clamping groove, and the top surface of the clamping block abuts against the top wall of the clamping groove. The position of the support connecting component can be conveniently adjusted, the installation and fixation of the stay cable can be conveniently adapted, the construction difficulty is reduced, and the work efficiency is improved. The cable-stayed bridge main tower is used in combination with three stay cable mounting racks, more connecting parts are provided, the number of stay cables can be increased to enhance the pulling of the bridge, different installation angle requirements can be better met, and the external installation environment can be better adapted.

Description

Technical Field

[0001] This invention relates to the field of cable-stayed bridge main towers, and more specifically, to a cable mounting frame and a cable-stayed bridge main tower using the cable mounting frame. Background Technology

[0002] Currently, the length of highway and railway bridge construction projects is generally several kilometers or even tens of kilometers, especially for bridges crossing rivers and seas. Due to the need for beam segment connection, such long lines cannot be entirely on straight sections, thus requiring the construction of curved beam bridges to meet the requirements. Curved beam bridges mainly use cable stays for tension and enhanced support, and the main tower structure is a very important structure of the entire cable-stayed bridge, providing tension support for the cable stays. However, the current main tower structure, especially the cable installation parts, is mostly fixed and cannot be adjusted according to the actual construction environment. The only way to meet the cable installation requirements is to adjust the external environment, which greatly increases the construction difficulty, requires a lot of manpower, material resources, and time, and has low overall efficiency, which needs to be improved. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the technical problem to be solved by the present invention is to propose a cable mounting frame and a main tower of a cable-stayed bridge using the cable mounting frame. Its structure is novel, and the position of the support connection components can be easily adjusted to facilitate the installation and fixing of the cables, thereby reducing the difficulty of construction and improving work efficiency.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] This invention provides a cable mounting bracket, including a ring-shaped bracket. The top edge of the bracket has a first slot, which forms a closed loop around the center of the bracket. Multiple sliding assemblies are provided in the first slot. The sliding assemblies can slide along the first slot and can be locked by bolts. A hanging lug is fixed on the sliding assembly, which is higher than the opening of the first slot. The bottom of the slot wall near the center of the bracket is recessed to the inward side to form a positioning groove. The sliding assemblies have a positioning block corresponding to the positioning groove. One end of the positioning block extends into the positioning groove, and the top surface of the positioning block abuts against the top wall of the positioning groove.

[0006] In a preferred embodiment of the present invention, the bracket includes a ring-shaped base plate. A first protruding ring and a second protruding ring are fixedly provided on the edge of the base plate. The outer diameter of the first protruding ring is the same as the outer diameter of the base plate, and the outer diameter of the second protruding ring is smaller than the inner diameter of the first protruding ring. An extended ring is fixedly provided on the top of the second protruding ring near the first protruding ring, and a third protruding ring is fixedly provided on the top edge of the extended ring near the first protruding ring. The first protruding ring and the third protruding ring form a first groove, and the second protruding ring and the extended ring form a locking groove. The slide assembly includes a slider and a locking block. The shape of the slider is the same as the first protruding ring. The shape of the slot is adapted, and the hanging ear is fixedly set on the top of the slider; a second slot is opened at the bottom of the slider, the opening of the second slot extends to the bottom surface of the slider and narrows at the opening; the shape of the locking block is adapted to the shape of the second slot, the locking block passes through the second slot, and the two ends of the locking block can respectively abut against the inner wall of the first convex ring and the outer wall of the second convex ring and slide, and the locking block and the slider are fixedly connected by bolts; an insertion port is opened on the ring wall of the first convex ring, the bottom of the insertion port is flush with the top surface of the base plate, and the locking block extends into the interior of the first slot through the insertion port.

[0007] In a preferred embodiment of the present invention, a thickened convex ring is fixedly provided on the top of the outer wall of the third convex ring, and a stepped cross-section is provided on the top surface of the slider corresponding to the thickened convex ring. The bottom surface of the thickened convex ring abuts against the stepped cross-section to form a secondary locking position. A notch is provided at the part of the thickened convex ring corresponding to the insertion port. The notch penetrates the upper and lower walls of the thickened convex ring. The width of the notch is greater than the width of the slider. The slider is inserted into the first slot through the notch.

[0008] In a preferred embodiment of the present invention, a first magnet is embedded on the wall of the corresponding insertion hole of the third convex ring, and a second magnet is embedded on the wall of the slider. When the second magnet is magnetically connected to the first magnet, the position of the insertion hole is aligned with the position of the second slot.

[0009] In a preferred embodiment of the present invention, a fifth slot is provided on the top outer side of the slider. The width of the fifth slot is adapted to the thickness of the first convex ring. The fifth slot is engaged with the top of the first convex ring and can slide along the top of the first convex ring. A plurality of first threaded holes are provided on the top outer wall of the first convex ring. The plurality of first threaded holes are arranged in a circumferential array around the axis of the first convex ring. A first through hole is provided on the outer wall of the slider. The slider is fixed by bolts that pass through the first through hole and the first threaded hole.

[0010] In a preferred embodiment of the present invention, the bottom of the first slot is provided with a plurality of second through holes, which are arranged in a circular array around the center of the base plate, and the positions of the second through holes correspond to the positions of the first threaded holes; the bottom surface of the locking strip is provided with a corresponding second threaded hole, and the locking strip is fixed by bolts that pass through the second through holes and the second threaded holes.

[0011] In a preferred embodiment of the present invention, a plurality of alignment holes are provided on the base plate, the plurality of alignment holes are located on the side of the second convex ring near the center of the base plate, and the plurality of alignment holes are arranged in an array around the center circumference of the base plate; an inner support frame is fixedly provided at the inner ring of the base plate, the inner support frame includes a support ring and a plurality of support bars, one end of the support bar is fixed on the support ring, the other end is fixed on the base plate, and the plurality of support bars are arranged in an array around the center circumference of the support ring.

[0012] The present invention also provides a main tower for a cable-stayed bridge, using the above-mentioned cable mounting frame;

[0013] Furthermore, the system includes a concrete foundation and three cable mounting brackets. The axes of the three cable mounting brackets coincide, and the support rings in the middle of the brackets are all fitted onto the support shaft. The first and second cable mounting brackets are connected by multiple first support rods, which are arranged in a circumferential array around the axis of the support shaft. Both ends of the first support rods are fixed with threaded posts, the diameter of which matches the diameter of the alignment hole. The diameter of the first support rod is larger than the diameter of the alignment hole. The threaded posts pass through the alignment hole, causing the ends of the first support rods to abut against the base plate. The threaded posts at both ends are locked by nuts. The second and third cable mounting brackets are connected by multiple second support rods, which are arranged in a circumferential array around the axis of the support shaft. The second support rods are staggered with the first support rods, and the first and second support rods have the same structure. The support shaft and the multiple cable mounting brackets are all embedded and fixed in the concrete foundation, and the outer wall of the concrete foundation is flush with the inner wall of the third convex ring.

[0014] The beneficial effects of this invention are as follows:

[0015] This invention provides a cable mounting frame and a main tower of a cable-stayed bridge using this cable mounting frame. The cable mounting frame has a novel structure. The cable mounting frame includes a ring-shaped bracket. The edge of the bracket is provided with a closed-loop first groove. Multiple sliding seat assemblies are slidably mounted on the first groove. The sliding seat assemblies are provided with lugs. The sliding seat assemblies can slide along the first groove and can be locked by bolts. Thus, the position of the sliding seat assemblies can be adjusted according to the needs, which is convenient for adapting to the installation and fixing of the cable. It provides a stable tension for the cable and does not require extensive adjustments to the external installation environment, thereby reducing construction difficulty and improving work efficiency.

[0016] Furthermore, the bottom of the first slot near the center of the bracket is recessed to the inward side to form a slot. The slide assembly is provided with a slotting block corresponding to the slot. One end of the slotting block extends into the slot and the top surface of the slotting block abuts against the top wall of the slot. According to the tensile force, this structural design can better transfer the force of the slide assembly to the bracket, which is conducive to the dispersion of force and prevents the force from being too concentrated and causing damage to the structural components.

[0017] The main tower of the cable-stayed bridge is constructed by fixing three cable mounting frames into a concrete foundation. The three cable mounting frames can be combined to provide more connection points. This can increase the tension on the bridge by increasing the number of cables, better meet different installation angle requirements, and better adapt to the external installation environment. Attached Figure Description

[0018] Figure 1 This is a first-view perspective three-dimensional structural diagram of a cable mounting bracket provided in a specific embodiment of the present invention;

[0019] Figure 2 This is a second-view perspective three-dimensional structural diagram of a cable mounting bracket provided in a specific embodiment of the present invention;

[0020] Figure 3 This is a three-dimensional structural diagram of the bracket provided in a specific embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the bracket provided in a specific embodiment of the present invention;

[0022] Figure 5 This is a first-view perspective three-dimensional structural diagram of the slide assembly provided in a specific embodiment of the present invention;

[0023] Figure 6 This is a two-dimensional structural diagram of the slide assembly provided in a specific embodiment of the present invention from a second perspective;

[0024] Figure 7 This is a schematic diagram of the main tower structure of a cable-stayed bridge provided in a specific embodiment of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the three-layer cable mounting frame provided in a specific embodiment of the present invention;

[0026] Figure 9 This is a three-dimensional structural diagram of the support rod provided in a specific embodiment of the present invention.

[0027] In the diagram: 100, bracket; 110, first slot; 111, second through hole; 120, positioning slot; 130, base plate; 131, inner support frame; 140, first convex ring; 141, insertion port; 142, first threaded hole; 150, second convex ring; 160, outer ring; 170, third convex ring; 180, thickened convex ring; 181, notch; 190, alignment hole; 200, slide assembly; 210, hanging ear; 220, positioning block; 221, second threaded hole; 230, slider; 231, second slot; 232, stepped cross-section; 233, fifth slot; 234, first through hole; 310, first magnet block; 320, second magnet block; 400, support shaft; 500, first support rod; 510, threaded column; 600, support shaft. Detailed Implementation

[0028] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1 to 6 As shown, a specific embodiment of the present invention discloses a cable mounting bracket, including a ring-shaped bracket 100. The top edge of the bracket 100 is provided with a first slot 110, which is a closed-loop structure around the center of the bracket. Multiple slide assemblies 200 are provided in the first slot 110. The slide assemblies 200 can slide along the first slot 110 and can be locked by bolts. A hanging ear 210 is fixed on the slide assembly 200, which is higher than the opening of the first slot. The bottom of the slot wall of the first slot 110 near the center of the bracket 100 is recessed to the inward side to form a positioning groove 120. The slide assembly 200 is provided with a positioning block 220 corresponding to the positioning groove 120. One end of the positioning block 220 extends into the positioning groove 120, and the top surface of the positioning block 220 abuts against the top wall of the positioning groove 120.

[0030] The aforementioned cable mounting bracket has a novel structure. The cable mounting bracket includes a ring-shaped bracket with a closed-loop first groove on the edge of the bracket. Multiple sliding block assemblies are slidably mounted on the first groove. Each sliding block assembly has a hanging lug. The sliding block assembly can slide along the first groove and can be locked by bolts. This allows the position of the sliding block assembly to be adjusted as needed, making it convenient to adapt to the installation and fixing of the cable. This provides a stable tension for the cable and eliminates the need for extensive adjustments to the external installation environment, thereby reducing construction difficulty and improving work efficiency.

[0031] Furthermore, the bottom of the first slot near the center of the bracket is recessed to the inward side to form a slot. The slide assembly is provided with a slotting block corresponding to the slot. One end of the slotting block extends into the slot, and the top surface of the slotting block abuts against the top wall of the slot. According to the tensile force, this structural design can better transfer the force of the slide assembly to the bracket, which is conducive to the dispersion of force and prevents the force from being too concentrated and causing damage to the structural components.

[0032] Furthermore, the bracket 100 includes a ring-shaped base plate 130. A first protruding ring 140 and a second protruding ring 150 are fixedly provided on the edge of the base plate 130. The outer diameter of the first protruding ring is the same as the outer diameter of the base plate, and the outer diameter of the second protruding ring is smaller than the inner diameter of the first protruding ring. An extension ring 160 is fixedly provided on the top of the second protruding ring 150 near the side of the first protruding ring 140, and a third protruding ring 170 is fixedly provided on the top edge of the extension ring 160 near the edge of the first protruding ring 140. The first protruding ring and the third protruding ring form a first slot, and the second protruding ring and the extension ring form a positioning groove. The positioning groove has an inwardly concave shape, and the top wall of the concave part can serve as a force-bearing part. When the positioning block extends into the positioning groove, it can effectively transfer the force of the slide assembly to the extension ring, thereby transferring the force to the bracket.

[0033] The slide assembly 200 includes a slider 230 and a locking block 220. The shape of the slider 230 is adapted to the shape of the first locking groove 110, and the hanging ear 210 is fixedly disposed on the top of the slider 230. A second locking groove 231 is formed at the bottom of the slider 230, and the opening of the second locking groove extends to the bottom surface of the slider and narrows at the opening. The shape of the locking block is adapted to the shape of the second locking groove. The locking block 220 passes through the second locking groove 231, and both ends of the locking block can slide against the inner wall of the first convex ring and the outer wall of the second convex ring, respectively. The locking block and the slider are fixedly connected by bolts. The second locking groove is a T-slot or a dovetail groove. The shape of the locking block is adapted to the shape of the second locking groove, and the locking block engages with the second locking groove. The combination ensures that the force on the slider is smoothly transmitted to the locking block, which then transmits the force to the bracket, effectively distributing and transmitting the force, thereby providing stable traction support to the outside. The top surface of the locking block is provided with a third threaded hole, and the slider is provided with a countersunk hole. The slider and the locking block are fixedly connected by countersunk bolts, which facilitates the assembly and disassembly of the slider and the locking block, allowing the slider and the locking block to move synchronously. The first convex ring 140 has an insertion port 141 on its ring wall. The bottom of the insertion port is flush with the top surface of the base plate. The locking block 220 extends into the first locking groove 110 through the insertion port 141, ensuring that the locking block can be smoothly inserted into the locking groove to form a locking position.

[0034] Furthermore, a thickened convex ring 180 is fixedly provided on the top of the outer wall of the third convex ring 170. A stepped cross-section 232 is provided on the top surface of the slider 230 corresponding to the thickened convex ring 180. The bottom surface of the thickened convex ring abuts against the stepped cross-section to form a secondary locking position. A notch 181 is provided on the part of the thickened convex ring 180 corresponding to the insertion port 141. The notch penetrates the upper and lower walls of the thickened convex ring. The width of the notch is greater than the width of the slider. The slider 230 is inserted into the first slot 110 through the notch 181. More specifically, during installation, the slider can be placed in the first slot through the notch position, and then the locking block can be inserted through the insertion port and penetrate the second slot. The slider and the locking block are fixed together with bolts. Then, the slide assembly is slid along the first groove so that the stepped cross-section abuts against the bottom surface of the thickened convex ring. This does not affect normal movement and installation, and can further strengthen the locking position of the slider. When the slide assembly is subjected to external force, it can better transmit and distribute the force to the bracket, and also provide more stable traction support to the outside.

[0035] Furthermore, a detachable filler block is installed at the notch, the shape of which matches the shape of the notch, and the filler block is fixed to the notch with bolts; furthermore, a fourth slot is provided on both sides of the notch, the opening of the fourth slot extending to the outer wall of the thickened convex ring, and a protrusion is fixed on both sides of the filler block, the shape of which matches the shape of the fourth slot, and the protrusion is locked in the fourth slot; the design of the filler block can fill and occupy the notch, preventing the slide assembly from loosening or falling off after moving to this part; the design of the protrusion and the fourth slot can also further strengthen the connection between the filler block and the thickened convex ring, and strengthen the force on the filler block part, especially when a slide assembly is located at this part, the filler block is needed to provide a secondary locking effect for the slide assembly, this structural design can also provide a certain support effect for the slide assembly through the filler block.

[0036] Furthermore, a first magnet block 310 is embedded on the wall surface of the third convex ring 170 corresponding to the insertion hole, and a second magnet block 320 is embedded on the wall surface of the slider 230. When the second magnet block and the first magnet block are magnetically connected, the position of the insertion hole is aligned with the position of the second slot. This structural design facilitates the connection and cooperation between the slider and the notch, so that the position of the insertion hole and the second slot can be accurately aligned and positioned, thereby facilitating the smooth insertion of the card block into the second slot, which is convenient for production assembly and improves efficiency.

[0037] Furthermore, a fifth slot 233 is provided on the top outer side of the slider 230. The width of the fifth slot 233 is adapted to the thickness of the first convex ring 140. The fifth slot is engaged with the top of the first convex ring and can slide along the top of the first convex ring. This can further enhance the movement guidance effect of the slider and also enable the slider to better transmit the force to the bracket, thereby dispersing the force.

[0038] The top outer wall of the first convex ring 140 is provided with a plurality of first threaded holes 142, which are arranged in a circumferential array around the axis of the first convex ring; the outer wall of the slider 230 is provided with a corresponding first through hole 234, and the slider is fixed by bolts inserted into the first through hole and the first threaded hole, which can securely lock the slider and prevent it from easily loosening or shifting in the future.

[0039] Furthermore, the slider, the second slot, the stepped cross-section, the countersunk hole, the lug, and the fifth slot are all integrally formed structures, ensuring their structural stability, effectively preventing breakage or damage under external force, improving the overall structural strength, and ensuring stable tension support for the cable.

[0040] Furthermore, the bottom of the first slot 110 is provided with a plurality of second through holes 111, which are distributed in a circular array around the center of the base plate. The positions of the second through holes correspond to the positions of the first threaded holes. The bottom surface of the locking strip 220 is provided with corresponding second threaded holes 221. The locking strip is fixed by bolts that pass through the second through holes and the second threaded holes. This structural design can further strengthen the connection between the locking strip and the bracket, which means strengthening the connection between the slide assembly and the bracket, and can effectively prevent loosening or displacement.

[0041] Furthermore, the base plate 130 is provided with a plurality of alignment holes 190, which are located on the side of the second convex ring 150 near the center of the base plate 130, and are distributed in an array around the center circumference of the base plate. The design of the alignment holes can facilitate the alignment adjustment when the multi-layer cable mounting bracket is used together; on the other hand, it can increase the contact area between the bracket and the concrete foundation, thereby strengthening the stable connection of the bracket.

[0042] An inner support frame 131 is fixedly provided at the inner ring of the base plate 130. The inner support frame includes a support ring and multiple support bars. One end of the support bar is fixed to the support ring, and the other end is fixed to the base plate. The multiple support bars are arranged in an array around the central circumference of the support ring. The design of the support ring can facilitate the alignment between multiple cable mounting frames, and can also further strengthen the connection with the concrete foundation through the support ring and support bars.

[0043] like Figures 7 to 9 As shown, the present invention also discloses a cable-stayed bridge main tower, using the above-mentioned cable mounting frame; the cable-stayed bridge main tower includes a concrete foundation 600 and three cable mounting frames;

[0044] The axes of the three cable mounting brackets coincide, and the support ring in the middle of the bracket 100 is sleeved on the support shaft 400, so that the multiple cable mounting brackets are on the same center line;

[0045] The first cable mounting frame and the second cable mounting frame are connected by multiple first support rods 500, which are arranged in a circular array around the axis of the support shaft; this creates a space between the first cable mounting frame and the second cable mounting frame, facilitating the entry of concrete and providing a stable connection and support;

[0046] Both ends of the first support rod 500 are fixed with threaded posts 510. The diameter of the threaded posts is adapted to the diameter of the alignment hole. The diameter of the first support rod is larger than the diameter of the alignment hole. The threaded posts pass through the alignment hole and make the end of the first support rod abut against the base plate. The threaded posts at both ends are locked by nuts, which can facilitate the disassembly and assembly of the first support rod and make it easy to use and operate.

[0047] The second cable mounting frame is connected to the third cable mounting frame by multiple second support rods. These second support rods are arranged in a circular array around the axis of the support shaft. The second support rods are staggered with the first support rods, and the first support rods have the same structure as the second support rods. This creates a space between the second and third cable mounting frames, facilitating the entry of concrete and providing a stable connection and support. The installation method and effect of the second support rods are consistent with those of the first support rods.

[0048] The support shaft and multiple cable mounting brackets are embedded and fixed in the concrete foundation, and the outer wall of the concrete foundation is flush with the inner wall of the third convex ring, providing sufficient operating space for the outside, especially preventing concrete from entering the first slot and affecting the normal movement and position adjustment of the slide assembly.

[0049] Furthermore, each cable mounting bracket is equipped with 20 sliding block assemblies, the first threaded holes on the first convex ring are 120, the second through holes on the base plate are 120, and the alignment holes are 12. The three cable mounting brackets are combined, and by adjusting the position of the alignment holes, the three cable mounting brackets can be staggered, so that the entire structure has 360 installation positions, which can achieve 360° installation conditions, meet more installation requirements of cable-stayed bridges, and effectively improve applicability.

[0050] This invention has been described through preferred embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. This invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims are also within the protection scope of this invention.

Claims

1. A cable mounting bracket, characterized in that: The bracket includes a ring-shaped bracket with a first slot on the top edge. The first slot is a closed loop around the center of the bracket. Multiple slide assemblies are provided in the first slot. The slide assemblies can slide along the first slot and can be locked by bolts. The slide assemblies are fixedly provided with hanging ears, which are higher than the opening of the first slot. The bottom of the first slot wall near the center of the bracket is recessed to the inward side to form a slot. The slide block is provided with a slot block corresponding to the slot. One end of the slot block extends into the slot and the top surface of the slot block abuts against the top wall of the slot. The bracket includes a ring-shaped base plate, with a first protruding ring and a second protruding ring fixedly provided on the edge of the base plate. The outer diameter of the first protruding ring is the same as the outer diameter of the base plate, and the outer diameter of the second protruding ring is smaller than the inner diameter of the first protruding ring. An extension ring is fixedly provided on the top of the second protruding ring near the side of the first protruding ring, and a third protruding ring is fixedly provided on the top edge of the extension ring near the first protruding ring. The first convex ring and the third convex ring form the first slot, and the second convex ring and the outer ring form the positioning slot. The slide assembly includes a slider and a locking block. The shape of the slider is adapted to the shape of the first slot, and the hanging ear is fixedly set on the top of the slider. The bottom of the slider is provided with a second slot, the opening of the second slot extends to the bottom surface of the slider and narrows at the opening; the shape of the locking block is adapted to the shape of the second slot, the locking block passes through the second slot, and the two ends of the locking block can slide against the inner wall of the first convex ring and the outer wall of the second convex ring respectively; the locking block and the slider are fixedly connected by bolts. The first convex ring has an insertion port on its ring wall. The bottom of the insertion port is flush with the top surface of the base plate. The locking block extends into the interior of the first slot through the insertion port. A thickened convex ring is fixedly provided on the top of the outer wall of the third convex ring. A stepped cross-section is provided on the top surface of the slider corresponding to the thickened convex ring. The bottom surface of the thickened convex ring abuts against the stepped cross-section to form a secondary locking position. The thickened convex ring has a notch at the corresponding insertion point. The notch penetrates the upper and lower walls of the thickened convex ring. The width of the notch is greater than the width of the slider. The slider is inserted into the first slot through the notch. A fifth slot is provided on the top outer side of the slider. The width of the fifth slot is adapted to the thickness of the first convex ring. The fifth slot is engaged with the top of the first convex ring and can slide along the top of the first convex ring. The top outer wall of the first convex ring is provided with a plurality of first threaded holes, which are arranged in a circumferential array around the axis of the first convex ring; the outer wall of the slider is provided with a corresponding first through hole, and the slider is fixed by bolts passing through the first through hole and the first threaded hole.

2. The cable mounting bracket according to claim 1, characterized in that: The third convex ring has a first magnet embedded in the wall of the corresponding insertion hole, and the slider has a second magnet embedded in the wall of the corresponding insertion hole. When the second magnet is magnetically connected to the first magnet, the position of the insertion hole is aligned with the position of the second slot.

3. A cable mounting bracket according to claim 2, characterized in that: The bottom of the first slot is provided with multiple second through holes, which are arranged in a circular array around the center of the base plate. The positions of the second through holes correspond to the positions of the first threaded holes. The bottom surface of the locking strip has a corresponding second threaded hole, and the locking strip is fixed by bolts that pass through the second through hole and the second threaded hole.

4. A cable mounting bracket according to claim 3, characterized in that: Multiple alignment holes are provided on the base plate. These alignment holes are located on the side of the second convex ring near the center of the base plate and are distributed in a circular array around the center of the base plate. An inner support frame is fixedly installed at the inner ring of the base plate. The inner support frame includes a support ring and multiple support bars. One end of the support bar is fixed to the support ring, and the other end is fixed to the base plate. The multiple support bars are arranged in an array around the central circumference of the support ring.

5. A main tower for a cable-stayed bridge, characterized in that: Use the cable mounting bracket as described in claim 4.

6. The main tower of a cable-stayed bridge according to claim 5, characterized in that: Includes a concrete foundation and three cable mounting frames; The axes of the three cable mounting brackets coincide, and the support rings in the middle of the brackets are all fitted onto the support shafts; The first cable mounting frame and the second cable mounting frame are connected by multiple first support rods, which are arranged in a circular array around the axis of the support shaft; Both ends of the first support rod are fixed with threaded posts. The diameter of the threaded posts is adapted to the diameter of the alignment hole. The diameter of the first support rod is larger than the diameter of the alignment hole. The threaded posts pass through the alignment hole and abut against the bottom plate at the end of the first support rod. The threaded posts at both ends are locked by nuts. The second cable mounting frame is connected to the third cable mounting frame by multiple second support rods. The multiple second support rods are arranged in a circular array around the axis of the support shaft. The second support rods are staggered with the first support rods, and the first support rods have the same structure as the second support rods. The support shaft and multiple cable mounting brackets are embedded and fixed in the concrete foundation, and the outer wall of the concrete foundation is flush with the inner wall of the third convex ring.

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