A tower mast structure and design method thereof

Abstract

The present invention relates to the technical field of communication tower masts, and provides a tower mast structure and a design method thereof, wherein the tower mast structure includes a vertical main pole and a transverse support pole, and a cable structure is arranged between two adjacent transverse support poles in the same vertical plane; the cable structure includes two flexible cables, the two flexible cables are arranged crosswise, the ends of the flexible cables are connected to the connection between the vertical main pole and the transverse support pole through a connecting piece, and the flexible cables are loaded with prestress. The present invention adopts a cable structure composed of flexible cables to replace the existing rigid cross web bars, and solves the technical problem of large steel consumption caused by the use of rigid cross web bars on the basis of ensuring the overall strength and stability of the tower mast structure. Compared with the rigid cross web bars, the windproof area of ​​the flexible cables is greatly reduced, thereby reducing the internal force transmitted from the flexible cables to the vertical main poles and the force of the entire tower mast structure on the foundation, and further improving the stability of the entire tower mast structure.

Description

Technical Field

[0001] The present invention relates to the technical field of communication tower masts, and in particular to a tower mast structure and a design method thereof. Background Art

[0002] Since 5G communication uses a higher frequency band, more and denser base stations are needed to mount 5G equipment. As a basic component of a communication base station, the communication tower mast accounts for a considerable proportion of the investment in base station construction. Most of the existing communication tower masts are still ground-based self-supporting lattice towers. Such communication tower masts are usually composed of a foundation, a tower mast structure installed on the foundation, and communication equipment mounted on the tower mast structure. Among them, the tower mast structure often adopts a space truss structure with rigid cross-ribs, including vertical main rods, transverse struts, and cross-ribs. In addition, such structural systems use linear analysis in calculation and analysis.

[0003] At present, the design of conventional ground-based self-supporting lattice towers all follows the requirements of the Steel Structure Design Standard for the slenderness ratio of the tower web system. Whether it is the herringbone main diagonal bar inherited from the power tower, the cross web bar form, or the single diagonal bar form later promoted by the tower company, it must meet the requirements of the specification for the slenderness ratio of the web bar.

[0004] However, in actual application, the cross webs in the tower mast structure are actually subjected to relatively small forces. However, in order to make the design of the communication tower mast comply with relevant specifications, no matter how small the forces on the cross webs are, rods that can meet the structural requirements must be used. However, the material strength of the rods that meet the structural requirements often far exceeds the actual force requirements, which leads to a significant increase in the amount of steel used in the cross webs. For example, for a tower mast structure that uses cross angle steel members as cross webs, the amount of steel used in the cross webs accounts for 25%-40% of the total steel used. Correspondingly, if the design of the cross webs only meets the actual force requirements but does not meet the structural requirements in the specifications, it will directly violate the relevant specifications. At this time, it will fail in terms of both design compliance and safety.

[0005] On the other hand, if a large number of larger angle steel components are used as cross web members, the wind-blocking area of ​​the cross web members is large and the wind load shape coefficient of the angle steel components is large, which not only increases the internal force transmitted to the vertical main pole, but also increases the force transmitted to the foundation, which directly affects the stability of the tower mast structure of the entire communication tower mast. Summary of the invention

[0006] The object of the present invention is to provide a tower mast structure and a design method thereof, so as to at least overcome the technical problems that the existing tower mast structure using rigid cross web members has a large amount of steel consumption and the rigid cross web members are subjected to a large wind load, which affects the overall stability of the tower mast structure.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] On the one hand, the present invention provides a tower mast structure, comprising a vertical main rod and a transverse support rod, wherein a cable structure is arranged between two adjacent transverse support rods located in the same vertical plane;

[0009] The cable structure includes two flexible cables, which are arranged crosswise. Both ends of the flexible cables are provided with connecting pieces. The ends of the flexible cables are connected to the connection between the vertical main rod and the transverse support rod through the connecting pieces. The flexible cables are loaded with prestress.

[0010] In some possible embodiments, the connecting member includes a node plate, a fork ear anchor, an adjusting nut and a connecting anchor, the node plate is arranged at the connection between the vertical main rod and the transverse support rod, the fork ear anchor is hinged to the node plate, the adjusting nut is located between the fork ear anchor and the connecting anchor, and the end of the flexible cable is anchored to the connecting anchor.

[0011] In some possible embodiments, the connecting member also includes a driving assembly, which includes a driving motor, a driving gear and a driven gear. The driving motor is arranged on the fork ear anchor, and the driving gear is transmission-connected to the output end of the driving motor. The driven gear is provided with a mounting port adapted to the adjusting nut. The driven gear is sleeved on the outer wall of the adjusting nut through the mounting port and transmission-connected to the adjusting nut, and the driven gear is meshed with the driving gear.

[0012] In some possible embodiments, the driven gear includes two half gears, each half gear is provided with a notch adapted to the adjusting nut, the notches of the two half gears together constitute a mounting port, and the two half gears are detachably connected.

[0013] In some possible embodiments, a plug-in block is provided at one end of the half gear, and a plug-in slot adapted to the plug-in block is provided at the other end of the half gear;

[0014] The plug-in block is provided with a first connection hole, and the side wall of the half gear is provided with a second connection hole penetrating the plug-in slot, and the first connection hole corresponds to the second connection hole.

[0015] In some possible embodiments, the drive assembly further includes a clamp and a mounting seat, the clamp is sleeved on the outer wall of the fork ear anchor, the mounting seat is arranged on the clamp, and the drive motor is mounted on the mounting seat.

[0016] In some possible embodiments, the cable structure further includes a clamping piece, and the intersection of the two flexible cables is connected by the clamping piece;

[0017] The connecting member includes a first card plate, a second card plate and a connecting column. The first card plate and the second card plate are respectively located on the outsides of the two flexible cables. There are four connecting columns, which are distributed in a circular array with the center of the intersection of the two flexible cables as the center. One end of the connecting column is connected to the first card plate, and the other end of the connecting column extends in a horizontal direction and is detachably connected to the second card plate.

[0018] In some possible embodiments, a rotating ring is sleeved on the outer wall of the connecting column, and the rotating ring is movably connected to the connecting column. The rotating ring is located between the first clamping plate and the second clamping plate, and the outer walls of the two flexible cables are in contact with the rotating ring.

[0019] In some possible embodiments, the first and second card plates are both provided with long waist-shaped holes adapted to the connecting columns, the long waist-shaped holes correspond to the connecting columns one by one, and the long waist-shaped holes extend toward the center of the intersection of the two flexible cables. The connecting columns pass through the long waist-shaped holes on the first and second card plates in turn and are detachably connected to the first and second card plates respectively.

[0020] On the other hand, the present invention provides a design method of the tower mast structure as described above, comprising the following steps:

[0021] S1. Establishing a spatial model of a tower mast structure, wherein the tower mast structure includes a vertical main rod, a transverse support rod and a cross web rod;

[0022] S2. replacing the cross web between two adjacent transverse struts in the same vertical plane in the spatial model of the tower mast structure with a cable structure, wherein the cable structure comprises two flexible cables, the two flexible cables are arranged crosswise, and both ends of the flexible cables are connected to the connection between the vertical main rod and the transverse strut;

[0023] S3. The flexible cable in the cable structure is set as a tension-only unit, and the constraint of the connection point between the flexible cable and the tower mast structure is released to form a hinged node;

[0024] S4. applying prestress to the flexible cables in the cable structure, and secondly, performing initial state form-finding analysis on the spatial model of the tower mast structure;

[0025] S5. Applying a load to the spatial model of the tower mast structure and performing a nonlinear analysis on the spatial model of the tower mast structure;

[0026] S6. After the strength and stability of all vertical main rods, transverse support rods and flexible cables in the spatial model of the tower mast structure meet the requirements, the design result of the tower mast structure is output.

[0027] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0028] The tower mast structure provided by the present invention adopts a cable structure composed of flexible cables to replace the existing rigid cross web members. On the basis of ensuring the overall strength and stability of the tower mast structure, it solves the technical problem of large steel consumption caused by the use of rigid cross web members. At the same time, compared with the rigid cross web members, the wind-blocking area of ​​the flexible cables is greatly reduced, thereby reducing the internal force transmitted from the flexible cables to the vertical main poles and the force of the entire tower mast structure on the foundation, thereby further improving the stability of the entire tower mast structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic structural diagram of a tower mast structure provided by an embodiment of the present invention;

[0030] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0031] Figure 3 A schematic diagram of the structure of a driven gear provided by an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the structure of a half gear provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of a clamping member provided in an embodiment of the present invention;

[0034] Figure 6 A front view of the clamping member after the second clamping plate is removed provided in an embodiment of the present invention;

[0035] Figure 7 A schematic structural diagram of another implementation manner of a clamping member provided in an embodiment of the present invention;

[0036] Figure 8 for Figure 7 Schematic diagram of the structure of the first card board.

[0037] Icons: 10-vertical main rod, 20-transverse support rod, 30-cable structure, 31-flexible cable, 32-connecting piece, 321-node plate, 322-fork ear anchor, 323-adjusting nut, 324-connecting anchor, 325-driving motor, 326-driving gear, 327-driven gear, 327a-installation port, 3271-half gear, 3271a-plug-in block, 3271b-plug-in slot, 328-hoop, 329-mounting seat, 33-clamping piece, 331-first clamping plate, 332-second clamping plate, 333-connecting column, 334-rotating ring, 335-long waist-shaped hole. DETAILED DESCRIPTION

[0038] Example 1

[0039] This embodiment provides a tower mast structure to at least overcome the technical problem that the existing tower mast structure uses a rigid cross web, which results in a large amount of steel and a large wind load on the rigid cross web, affecting the overall stability of the tower mast structure. Figure 1 The structure diagram of the tower mast structure shown in FIG. 1 includes a vertical main rod 10 and a transverse support rod 20. It should be noted that: Figure 1 Only a part of the tower mast structure is shown. Figure 1 The structure shown is based on expansion upward or downward.

[0040] In this embodiment, there are multiple vertical main rods 10, and the multiple vertical main rods 10 are distributed in an array. Figure 1 As shown in the figure, four vertical main rods 10 are provided in this embodiment. It is understandable that the number of vertical main rods 10 can be increased or decreased as needed in actual implementation. Figure 1 , the transverse support rod 20 is arranged between two adjacent vertical main rods 10 on the same side, and the two ends of the transverse support rod 20 are respectively connected to the two vertical main rods 10, and there are also multiple transverse support rods 20 arranged between two adjacent vertical main rods 10 on the same side, and multiple transverse support rods 20 are arranged in sequence along the length of the vertical main rods 10. At this time, multiple vertical main rods 10 and multiple transverse support rods 20 together constitute the main frame of the space truss structure. It should be noted that the space truss structure composed of the vertical main rods 10 and the transverse support rods 20 can refer to the tower mast structure of the existing communication tower mast, and no further details will be given here.

[0041] In order to overcome the drawbacks of the rigid cross web members used in the tower mast structure in the prior art, in this embodiment, the rigid cross web members in the existing tower mast structure are replaced by a cable structure 30. Specifically, a cable structure 30 is provided between two adjacent transverse support rods 20 located in the same vertical plane.

[0042] The cable structure 30 includes two flexible cables 31, which are combined with Figure 1 As shown in the figure, two flexible cables 31 are cross-arranged between two adjacent transverse struts 20. It can be understood that the flexible cables 31 in this embodiment can be but are not limited to steel strands. Figure 1, both ends of the flexible cable 31 are provided with connecting parts 32. At this time, the end of each end of the flexible cable 31 is connected to the connection between the vertical main rod 10 and the transverse support rod 20 (i.e., the node of the tower mast structure) through a connecting part 32, so that the space truss structure formed by the flexible cable 31, the vertical main rod 10 and the transverse support rod 20 is tensioned. At the same time, by tensioning each flexible cable 31, a prestress is loaded on each flexible cable 31. By loading prestress on the flexible cables 31, internal stress can be formed after the two flexible cables 31 are tensioned and rigidity is generated, thereby ensuring the force and stability of the space truss system of the entire tower mast structure, that is, the two flexible cables 31 have the same function as the rigid cross web.

[0043] It can be seen that the tower mast structure provided in this embodiment adopts a cable structure 30 composed of flexible cables 31 to replace the existing rigid cross webs. On the basis of ensuring the overall strength and stability of the tower mast structure, it solves the technical problem of large steel consumption caused by the use of rigid cross webs. At the same time, compared with the rigid cross webs, the windshield area of ​​the flexible cables 31 is greatly reduced, thereby reducing the internal force transmitted from the flexible cables 31 to the vertical main poles 10 and the force of the entire tower mast structure on the foundation, thereby further improving the stability of the entire tower mast structure.

[0044] In this embodiment, in order to achieve tensioning of the flexible cable 31 and to load prestress to the flexible cable 31, Figure 2 As shown, the connecting member 32 includes a node plate 321, a fork ear anchor 322, an adjusting nut 323 and a connecting anchor 324. The node plate 321 is arranged at the connection between the vertical main rod 10 and the transverse support rod 20, the fork ear anchor 322 is hinged to the node plate 321, the adjusting nut 323 is located between the fork ear anchor 322 and the connecting anchor 324, and the end of the flexible cable 31 is anchored to the connecting anchor 324.

[0045] It can be understood that the connecting member 32 used in the present embodiment is a conventional cable rigging in the prior art. Specifically, when it is necessary to load and adjust the prestress on the flexible cable 31, the connecting anchor 324 can be moved closer to or away from the fork ear anchor 322 by rotating the adjusting nut 323 in the forward or reverse direction, and then the flexible cable 31 is tensioned by the connecting anchor 324, thereby achieving the loading of prestress on the flexible cable 31, and the size of the prestress loaded on the flexible cable 31 can be adjusted as needed.

[0046] Example 2

[0047] Considering that the connector 32 used in Example 1 is a conventional cable rigging in the prior art, such cable rigging often requires manual use of tools such as a wrench to rotate the adjustment nut 323 in actual use to achieve the application of prestress to the flexible cable 31. However, in general, the tower mast structure of the communication tower mast is often high, so when applying prestress to the high-height flexible cable 31, manual high-altitude work is required, which has high labor intensity and poses a great safety hazard. In addition, after the communication tower mast is put into use, the prestress applied to the flexible cable 31 cannot be automatically adjusted as needed.

[0048] To this end, based on Example 1, this embodiment further optimizes the structure of the connecting member 32 to achieve the application of prestress to the flexible cable 31 without human intervention as much as possible.

[0049] In this embodiment, the connecting member 32 further includes a driving assembly, which is in transmission connection with the adjusting nut 323, so as to drive the adjusting nut 323 to rotate through the driving assembly. Figure 2 The driving assembly includes a driving motor 325, a driving gear 326 and a driven gear 327. The driving motor 325 is arranged on the fork ear anchor 322. The driving gear 326 is connected to the output end of the driving motor 325 so as to drive the driving gear 326 to rotate through the driving motor 325. The driven gear 327 is provided with a mounting hole 327a adapted to the adjusting nut 323. The driven gear 327 is sleeved on the outer wall of the adjusting nut 323 through the mounting hole 327a, and the driven gear 327 is connected to the adjusting nut 323 so that the driven gear 327 can drive the adjusting nut 323 to rotate. At the same time, the driven gear 327 is meshed with the driving gear 326.

[0050] With such arrangement, when it is necessary to apply prestress to the flexible cable 31, it is only necessary to start the driving motor 325 to drive the driving gear 326 to rotate through the driving motor 325, thereby driving the driven gear 327 to rotate through the driving gear 326, and then driving the adjusting nut 323 to rotate through the driven gear 327, so as to achieve the application of prestress to the flexible cable 31. In this process, it is only necessary to reasonably control the forward or reverse rotation of the driving motor 325 to make the adjusting nut 323 rotate forward or reverse, thereby achieving the adjustment of the size of the prestress applied to the flexible cable 31.

[0051] It should be noted that, in order to facilitate the control of the operation of the drive motor 325, the connecting member 32 also includes a controller (not shown in the figure). In this case, the controller can be set on the ground, and the controller is connected to the drive motor 325 in communication, so that the drive motor 325 can be controlled directly on the ground by the controller, so as to further improve the degree of automation when applying prestress to the flexible cable 31. Secondly, the power supply for providing electric energy to the drive motor 325 can be a battery, and the battery can be arranged together with the drive motor 325, so as to ensure that the drive motor 325 can operate reliably.

[0052] Secondly, considering that the cross section of the existing adjusting nut 323 is a regular hexagonal structure, at this time, in order to sleeve the driven gear 327 on the outer wall of the adjusting nut 323 without changing the structure of the adjusting nut 323 and realize the transmission connection between the two, please refer to Figure 3 The driven gear 327 includes two half gears 3271, and the two half gears 3271 are both provided with notches that match the adjusting nut 323. When the two half gears 3271 are assembled on the adjusting nut 323, the notches of the two half gears 3271 together constitute a mounting opening 327a with a regular hexagonal cross-section, and the two half gears 3271 are detachably connected. At this time, the connection relationship between the two half gears 3271 and the adjusting nut 323 is an interference fit, so that the driven gear 327 formed by the combination of the two half gears 3271 drives the adjusting nut 323 to rotate.

[0053] To achieve a detachable connection between the two half gears 3271, refer to Figure 4 A plug-in block 3271a is provided at one end of the half gear 3271, and a plug-in slot 3271b adapted to the plug-in block 3271a is provided at the other end of the half gear 3271. At this time, a first connecting hole is provided on the plug-in block 3271a, and a second connecting hole horizontally penetrating the plug-in slot 3271b is provided on the side wall of the half gear 3271, and the first connecting hole corresponds to the second connecting hole. When the two half gears 3271 need to be connected together, it is only necessary to insert the plug-in block 3271a on one of the half gears 3271 into the plug-in slot 3271b of the other half gear 3271. Correspondingly, the plug-in block 3271a on the other half gear 3271 is inserted into the plug-in slot 3271b of the corresponding half gear 3271. At this time, the first connecting hole on the plug-in block 3271a is aligned with the second connecting hole on the corresponding half gear 3271, and then fasteners such as bolts can be passed through the first connecting hole and the second connecting hole to achieve a reliable connection between the two half gears 3271.

[0054] In addition, continue to refer to Figure 2The driving assembly further includes a clamp 328 and a mounting seat 329, wherein the clamp 328 is sleeved on the outer wall of the fork ear anchor 322 so that the clamp 328 can be clamped and fixed on the outer wall of the fork ear anchor 322, and the mounting seat 329 is arranged on the clamp 328, and the driving motor 325 is mounted on the mounting seat 329. In this arrangement, by adding the clamp 328 and the mounting seat 329, the driving motor 325 can be mounted on the fork ear anchor 322 without changing the structure of the fork ear anchor 322, so that the driving motor 325 can be easily disassembled and assembled.

[0055] It can be seen that the tower mast structure provided in this embodiment further optimizes the structure of the connecting member 32, specifically, by adding a driving assembly consisting of a driving motor 325, a driving gear 326 and a driven gear 327 to drive the adjusting nut 323 to rotate, and cooperates with a controller for controlling the operation of the driving motor 325, so as to realize the prestress loading and prestressing adjustment of the high-height flexible cable 31 in a safe position such as the ground, effectively reducing the labor intensity of manual labor and the operation risk of manual labor when working at high altitudes. At the same time, the driving assembly added in this embodiment does not need to change the structure of the adjusting nut 323 and the fork ear anchor 322 in the existing cable rigging, and the structure is simple and easy and quick to install.

[0056] Example 3

[0057] Based on Example 1, Figure 1 As shown in the content, the cable structure 30 in this embodiment also includes a clamping piece 33, and the intersection of the two flexible cables 31 is connected by the clamping piece 33. The intersection of the two flexible cables 31 is connected together by the clamping piece 33, which can further improve the reliability of the cable structure 30 composed of the two flexible cables 31. At the same time, when there is a large wind load, even if the two flexible cables 31 swing under the action of the wind load, the two flexible cables 31 can also swing synchronously.

[0058] For details, please refer to Figure 5 and Figure 6 The clamping member 33 includes a first clamping plate 331, a second clamping plate 332 and a connecting column 333. The first clamping plate 331 and the second clamping plate 332 are respectively located on the outsides of the two flexible cables 31. It can be understood that, in the assembled state, the outer wall of one of the flexible cables 31 contacts the side wall of the first clamping plate 331 facing the second clamping plate 332, and correspondingly, the outer wall of the other flexible cable 31 contacts the side wall of the second clamping plate 332 facing the first clamping plate 331, thereby relying on the first clamping plate 331 and the second clamping plate 332 to limit the freedom of the two flexible cables 31 in the front and rear directions.

[0059] Secondly, combined Figure 6As shown in the content, the number of connecting columns 333 is four, and the four connecting columns 333 are distributed in a circular array with the center of the intersection of the two flexible cables 31 as the center of the circle, that is, the four connecting columns 333 are distributed in the four directions of up, down, left and right at the intersection of the two flexible cables 31, and each connecting column 333 is located in the area formed by the intersection of the two flexible cables 31, so that the four connecting columns 333 further limit the degree of freedom of the first clamping plate 331 and the second clamping plate 332, thereby realizing a reliable connection at the intersection of the two flexible cables 31.

[0060] At this time, continue to refer to Figure 5 One end of the connecting column 333 is connected to the first clamping plate 331, and the other end of the connecting column 333 extends in the horizontal direction and is detachably connected to the second clamping plate 332. Preferably, the outer wall of the end of the connecting column 333 away from the first clamping plate 331 is provided with an external thread, and the second clamping plate 332 is provided with a through hole adapted to the connecting column 333. When the end of the connecting column 333 away from the first clamping plate 331 passes through the through hole of the second clamping plate 332, a nut can be used to screw on the connecting column 333 to achieve a reliable connection between the connecting column 333 and the second clamping plate 332, and make the disassembly and assembly process of the first clamping plate 331 and the second clamping plate 332 simpler and more convenient.

[0061] In addition, considering that after the intersection of the two flexible cables 31 is connected by the clamping piece 33, there may be a need to adjust the prestress loaded on the flexible cable 31 in the later stage, at this time, if the prestress is adjusted directly by rotating the adjusting nut 323, the flexible cable 31 will move relative to each other, and there will be a large friction force between the flexible cable 31 and the connecting column 333. This friction force will hinder the relative movement of the flexible cable 31, making the process of adjusting the prestress loaded on the flexible cable 31 more difficult or even impossible to adjust, and will cause greater wear on the flexible cable 31.

[0062] To this end, combined Figure 5 and Figure 6As shown in the figure, the outer wall of the connecting column 333 in this embodiment is sleeved with a rotating ring 334, and the rotating ring 334 is movably connected with the connecting column 333, that is, the rotating ring 334 can rotate freely relative to the connecting column 333. At this time, the rotating ring 334 is located between the first clamping plate 331 and the second clamping plate 332, and the outer walls of the two flexible cables 31 are in contact with the rotating ring 334. In this way, by further arranging a rotatable rotating ring 334 on the outer wall of the connecting column 333, when adjusting the prestress loaded on the flexible cable 31, the relative movement of the flexible cable 31 will drive the rotating ring 334 to rotate, which also realizes that when adjusting the prestress loaded on the flexible cable 31, the friction between the flexible cable 31 and the connecting column 333 is reduced, thereby making the process of adjusting the prestress loaded on the flexible cable 31 smoother and without removing the clamping member 33, and can effectively reduce the wear of the flexible cable 31 in the stage of adjusting the prestress, thereby increasing the service life of the flexible cable 31.

[0063] It can be seen that the tower mast structure provided in this embodiment can further improve the reliability of the cable structure 30 composed of two flexible cables 31 by further adding a clamping piece 33 that connects the two flexible cables 31 together. At the same time, when it is necessary to adjust the prestress loaded on the flexible cable 31 in the later stage, the friction between the flexible cable 31 and the clamping piece 33 can be reduced, thereby enabling the process of adjusting the prestress to proceed smoothly and reducing the friction loss of the flexible cable 31.

[0064] Example 4

[0065] On the basis of Example 3, taking into account that in actual application, according to different design requirements, the size of the prestress required to be loaded on the flexible cable 31 is also different. At this time, the diameter of the flexible cable 31 used may also change. Therefore, in order to further improve the practicality of the clip 33 and make the clip 33 suitable for connecting and using flexible cables 31 of various diameters, this embodiment also makes further improvements to the structure of the clip 33.

[0066] Please refer to Figure 7 and Figure 8 In the present embodiment, the first card plate 331 and the second card plate 332 have the same structure. Specifically, the first card plate 331 and the second card plate 332 are both provided with long waist-shaped holes 335 adapted to the connecting column 333. The long waist-shaped holes 335 correspond to the connecting column 333 one by one, and the long waist-shaped holes 335 extend toward the center of the intersection of the two flexible cables 31. At this time, for a single connecting column 333, the connecting column 333 passes through the long waist-shaped holes 335 on the first card plate 331 and the second card plate 332 in turn and is detachably connected to the first card plate 331 and the second card plate 332 respectively.

[0067] Preferably, external threads are provided on the outer walls of both ends of the connecting column 333. After the connecting column 333 passes through the long waist-shaped holes 335 on the first clamping plate 331 and the second clamping plate 332 in sequence, nuts are screwed on both ends of the connecting column 333 to achieve reliable connection between the connecting column 333 and the first clamping plate 331, and between the connecting column 333 and the second clamping plate 332. In this way, the position of the connecting column 333 can be adjusted according to the diameter of the flexible cable 31, thereby adjusting the distance between two adjacent connecting columns 333, so that the clamping member 33 can be used for flexible cables 31 of various diameters, and the entire adjustment process is simple and quick.

[0068] Example 5

[0069] On the basis of Example 1, this embodiment provides a design method of a tower mast structure as described in Example 1, comprising the following steps:

[0070] S1. A spatial model of the tower mast structure is established according to the height of the tower mast structure and the root opening size of the foundation in the design requirements. The spatial model is also a three-dimensional model of the tower mast structure, wherein the tower mast structure includes a vertical main rod 10, a transverse support rod 20 and a cross web member. That is to say, the spatial model of the tower mast structure initially established adopts a cross web member type spatial truss structure, which is the same as the existing tower mast structure.

[0071] S2. Replace the cross web between two adjacent transverse struts 20 in the same vertical plane in the spatial model of the tower mast structure with a cable structure 30, wherein the cable structure 30 includes two flexible cables 31, which are cross-arranged, and both ends of the flexible cables 31 are connected to the connection between the vertical main rod 10 and the transverse strut 20 (i.e., the node of the tower mast structure).

[0072] S3. Since the flexible cable 31 cannot be compressed or bent, it is necessary to set the flexible cable 31 in the cable structure 30 as a tension-only unit, and release the constraint of the connection point between the flexible cable 31 and the tower mast structure (i.e., the connection between the flexible cable 31 and the node of the tower mast structure) to form a hinged node. For example, the connector 32 described in Example 1 can be used to connect the end of the flexible cable 31 to the node of the tower mast structure to form a hinged node.

[0073] S4. Apply prestress to the flexible cables 31 in the cable structure 30. For example, a prestress of 5KN may be applied to the flexible cables 31 in the initial state. Secondly, perform initial state form-finding analysis on the spatial model of the tower mast structure, i.e. determine the initial state internal force and initial state horizontal displacement of the spatial model of the tower mast structure.

[0074] It should be noted that, considering that in the actual installation process, this type of tower mast structure is suitable for being assembled in sections from bottom to top, after each section is assembled, the flexible cable 31 of the cable structure 30 in the tower mast structure section needs to be subjected to corresponding prestress to ensure the lateral stiffness and overall stability of the tower mast structure section. Therefore, in the form-finding analysis process, it is necessary to consider whether the deformation of the tower mast structure section will affect the installation of subsequent tower sections after the prestress is applied to the flexible cable 31 of the first tower mast structure section. If the initial horizontal displacement after the prestress is applied is too large, the prestress of the flexible cable 31 should be readjusted so that the initial horizontal displacement is not greater than 1 mm. If the prestress of the flexible cable 31 is too low due to the control of the initial horizontal displacement, the rigidity of the tower mast structure in the horizontal direction should be increased by adjusting the cross-sectional size of the transverse support rod 20 to ensure that the initial stress of the flexible cable 31 is not too low.

[0075] S5. After the form-finding analysis of the spatial model of the tower mast structure is successful, loads are applied to the spatial model of the entire tower mast structure, wherein the loads applied to the spatial model of the entire tower mast structure include but are not limited to working loads (i.e., loads applied to the tower mast structure by the communication equipment mounted on the tower mast structure), wind loads, earthquake loads, etc. After the load application is completed, a nonlinear analysis is performed on the spatial model of the tower mast structure, and the cross-sectional sizes of the vertical main rods 10, the transverse support rods 20, and the flexible cables 31 are adjusted again according to the nonlinear analysis results, so that the cross-sectional materials of the vertical main rods 10, the transverse support rods 20, and the flexible cables 31 are optimized, and it is ensured that under the action of the standard load combination dominated by wind loads, the horizontal displacement of any point in the spatial model of the tower mast structure is not greater than 1 / 75 of its height.

[0076] S6. After continuous adjustment and analysis, when the strength and stability of all vertical main rods 10, transverse support rods 20 and flexible cables 31 in the spatial model of the tower mast structure meet the requirements, the design result of the tower mast structure is output, and then the installation and construction of the tower mast structure can be carried out according to the design result.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tower mast structure, comprising a vertical main rod and a transverse support rod, characterized in that: A cable structure is provided between two adjacent transverse support rods located in the same vertical plane; The cable structure comprises two flexible cables, which are arranged crosswise, and both ends of the flexible cables are provided with connecting pieces, and the ends of the flexible cables are connected to the connection between the vertical main rod and the transverse support rod through the connecting pieces, and the flexible cables are loaded with prestress; The cable structure also includes a clamping piece, and the intersection of the two flexible cables is connected by the clamping piece; The clamping member includes a first clamping plate, a second clamping plate and a connecting column, wherein the first clamping plate and the second clamping plate are respectively located outside the two flexible cables, and the number of the connecting columns is four, and the four connecting columns are distributed in a circular array with the center of the intersection of the two flexible cables as the center of the circle, one end of the connecting column is connected to the first clamping plate, and the other end of the connecting column is extended in the horizontal direction and is detachably connected to the second clamping plate; The outer wall of the connecting column is sleeved with a rotating ring, the rotating ring is movably connected to the connecting column, the rotating ring is located between the first clamping plate and the second clamping plate, and the outer walls of the two flexible cables are in contact with the rotating ring; The first and second card plates are both provided with long waist-shaped holes adapted to the connecting columns, the long waist-shaped holes correspond to the connecting columns one by one, and the long waist-shaped holes extend toward the center of the intersection of the two flexible cables. The connecting columns pass through the long waist-shaped holes on the first and second card plates in turn and are detachably connected to the first and second card plates respectively.

2. The tower mast structure according to claim 1, characterized in that: The connecting member includes a node plate, a fork ear anchor, an adjusting nut and a connecting anchor. The node plate is arranged at the connection between the vertical main rod and the transverse support rod. The fork ear anchor is hinged to the node plate. The adjusting nut is located between the fork ear anchor and the connecting anchor. The end of the flexible cable is anchored to the connecting anchor.

3. The tower mast structure according to claim 2, characterized in that: The connecting member also includes a driving assembly, which includes a driving motor, a driving gear and a driven gear. The driving motor is arranged on the fork ear anchor, and the driving gear is transmission-connected to the output end of the driving motor. The driven gear is provided with a mounting opening adapted to the adjusting nut. The driven gear is sleeved on the outer wall of the adjusting nut through the mounting opening and transmission-connected to the adjusting nut. The driven gear is meshed with the driving gear.

4. The tower mast structure according to claim 3, characterized in that: The driven gear comprises two half gears, each of which is provided with a notch adapted to the adjusting nut, the notches of the two half gears together constitute a mounting opening, and the two half gears are detachably connected.

5. The tower mast structure according to claim 4, characterized in that: A plug-in block is provided at one end of the half gear, and a plug-in slot adapted to the plug-in block is provided at the other end of the half gear; The plug-in block is provided with a first connection hole, and the side wall of the half gear is provided with a second connection hole penetrating the plug-in slot, and the first connection hole corresponds to the second connection hole.

6. The tower mast structure according to claim 3, characterized in that: The driving assembly also includes a clamp and a mounting seat. The clamp is sleeved on the outer wall of the fork ear anchor, the mounting seat is arranged on the clamp, and the driving motor is installed on the mounting seat.

7. A design method for a tower mast structure according to claim 1, characterized in that: The following steps are involved: S1. Establishing a spatial model of a tower mast structure, wherein the tower mast structure includes a vertical main rod, a transverse support rod and a cross web rod; S2. replacing the cross web between two adjacent transverse struts in the same vertical plane in the spatial model of the tower mast structure with a cable structure, wherein the cable structure comprises two flexible cables, the two flexible cables are arranged crosswise, and both ends of the flexible cables are connected to the connection between the vertical main rod and the transverse strut; S3. The flexible cable in the cable structure is set as a tension-only unit, and the constraint of the connection point between the flexible cable and the tower mast structure is released to form a hinged node; S4. applying prestress to the flexible cables in the cable structure, and secondly, performing initial state form-finding analysis on the spatial model of the tower mast structure; S5. Applying a load to the spatial model of the tower mast structure and performing a nonlinear analysis on the spatial model of the tower mast structure; S6. After the strength and stability of all vertical main rods, transverse support rods and flexible cables in the spatial model of the tower mast structure meet the requirements, the design result of the tower mast structure is output.

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