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CN-122014048-A - Power transmission tower modularization cooperation anti-torsion reinforcing system

CN122014048ACN 122014048 ACN122014048 ACN 122014048ACN-122014048-A

Abstract

A modularized cooperative torsion-resistant reinforcement system for a power transmission tower. The invention relates to the technical field of reinforcement of a power transmission line structure, and aims to solve the problem of insufficient torsional rigidity of the upper part of a tower body of an existing power transmission tower. The system comprises section restraint modules which are arranged at intervals along the tower body and a longitudinal dowel bar system which connects the modules. The cross section constraint module locks four main materials with the same cross section through two orthogonal stacked main material fixing frames, so that rigidity coordination of a plurality of main materials at the same cross section is realized. The longitudinal force transmission rod system is formed by welding a longitudinal connecting rod and an oblique stiffening rib. The core torsion-resistant mechanism is that when the upper part of the tower body is twisted, the section constraint module converts the torsion trend into shearing force and bending moment for the longitudinal connecting rod, and the internal force is transmitted through the longitudinal force transmission rod system and redistributed to the lower part structure of the tower body with higher rigidity to bear together, so that the integral torsion is obviously restrained. Through the modularized design, a clear force redistribution path is established in the tower body, and the structural safety and the torsion resistance are effectively improved.

Inventors

  • CHEN FUBIN
  • CHEN YINGCHAO
  • Weng lanxi

Assignees

  • 长沙理工大学

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The modularized cooperative torsion-resistant reinforcing system for the power transmission tower is characterized by comprising a plurality of section constraint modules which are distributed at intervals along the height direction of the tower body, and a longitudinal force transmission rod system connected between the section constraint modules.
  2. 2. The power transmission tower modularization cooperative torsional reinforcement system according to claim 1, wherein the section constraint module comprises two main material fixing frames (2), an upper locking flange plate (3), a lower locking flange plate (6), a central connecting block (9) and a set of high-strength bolt connection pairs (4), and the cross section constraint module is arranged at each transverse partition surface of the tower body.
  3. 3. The modular coordinated torsional reinforcement system of a power transmission tower according to claim 2, characterized in that two said main material fixing frames (2) are orthogonally superimposed at 90 degrees, the frames of which are connected to the main material (5) of the power transmission tower by means of fasteners.
  4. 4. The power transmission tower modularized cooperative torsional reinforcement system according to claim 2, wherein limiting calipers (7) protruding towards the center direction of the upper locking flange plate (3) and the lower locking flange plate (6) are arranged on the upper locking flange plate and the lower locking flange plate, and the limiting calipers (7) form circumferential constraint on the stacked main material fixing frames (2) from the upper side and the lower side.
  5. 5. The transmission tower modularization cooperative torsional reinforcement system according to claim 2, wherein the central connecting block (9) is fixed on the inner side of the disc surface of the upper locking flange plate (3) or the lower locking flange plate (6) and is filled between the central through holes of the two main material fixing frames (2).
  6. 6. The power transmission tower modularized cooperative torsional reinforcement system according to claim 2, wherein the high-strength bolt group (4) comprises a central bolt and four peripheral bolts, the central bolt coaxially penetrates through the upper locking flange plate (3), the central connecting block (9), the two main material fixing frames (2) and the lower locking flange plate (6), and the four peripheral bolts are arranged around the central bolt and penetrate through the upper locking flange plate (3), the limit caliper (7) and the lower locking flange plate (6).
  7. 7. The power transmission tower modularized cooperative torsional reinforcement system according to claim 2, wherein the inner side surface of the limit caliper (7) forms a guide clamping groove for limiting the radial displacement of the main material fixing frame (2).
  8. 8. The power transmission tower modular cooperative torsional reinforcement system as recited in claim 1, wherein the longitudinal force transmission rod system comprises a plurality of longitudinal connecting rods (1), each longitudinal connecting rod (1) being welded to a main material fixing frame (2) in the section constraint modules of different heights.
  9. 9. The power transmission tower modularized cooperative torsion reinforcement system according to claim 8, wherein oblique stiffening ribs (8) are welded between two adjacent longitudinal connecting rods (1), and the longitudinal connecting rods (1) and the oblique stiffening ribs (8) together form a space triangular truss structure.
  10. 10. The power transmission tower modularized cooperative torsional reinforcement system according to claim 2, wherein the main material fixing frame (2) is a rectangular rigid frame with an inner side contour matched with the outer surface of the power transmission tower main material (5).

Description

Power transmission tower modularization cooperation anti-torsion reinforcing system Technical Field The invention relates to the technical field of power transmission line structure reinforcement, and particularly provides a power transmission tower modularization cooperative torsion-resistant reinforcement system. Background The power transmission tower is used as a large high-rise truss structure, bears power loads such as strong wind, asymmetric icing, broken line impact and the like for a long time, is easy to induce harmful torsional deformation and vibration at the upper part of the tower body, further leads to loosening of joints, fatigue damage and even local instability, is particularly remarkable at the upper part of the tower body with smaller section size and relatively flexible structure, mainly adopts a traditional reinforcing mode of welding an additional diagonal brace or a welding steel plate in the current engineering, belongs to permanent invasive operation, is difficult to construct, is difficult to control in quality, can damage the performance of a base metal at high welding temperature, introduces residual stress, and cannot be flexibly adjusted. In addition, the existing reinforcement concept is mostly limited to the passive thinking of 'local weak point reinforcement' or 'external additional support', and the characteristic that the inherent lower rigidity of the power transmission tower is far greater than that of the conical structure of the upper part cannot be fully utilized from the overall system mechanical behavior of the structure, so that a set of efficient and internal load redistribution mechanism is actively designed and implanted, and the concentrated torque borne by the upper part is actively and cooperatively transmitted and distributed to the tower body structure with huge lower rigidity and even the foundation is realized. Therefore, an innovative reinforcement technical scheme is urgently needed in the field, the scheme can realize the connection of the original tower body structure without thermal damage, has the construction advantages of modularization, reversibility and adjustability, can establish a clear force flow path in the tower body through exquisite structural design, and systematically realizes the longitudinal transmission and cooperative resistance of torque, thereby fundamentally improving the overall torsion resistance, safety margin and economy of the power transmission tower. Disclosure of Invention The invention aims to overcome the defects of the prior art and provide a modularized and adjustable power transmission tower cooperative torsion-resistant reinforcing system which has no damage to the original structure. The system aims to solve the technical problems that the existing power transmission tower, in particular to the upper part of the tower body, has insufficient torsional rigidity under the action of wind load and wire tension and is easy to generate harmful torsional deformation. In order to achieve the above purpose, the invention adopts the following technical scheme: The invention relates to a modularized cooperative torsion-resistant reinforcing system for a power transmission tower, which is characterized by comprising a plurality of section constraint modules which are distributed at intervals along the height direction of the tower body, and a longitudinal dowel bar system connected between the section constraint modules. Further, the section constraint module is a core stress and force transmission unit of the system and is arranged at each transverse plane of the power transmission tower body. The four main materials (5) of the power transmission tower at the same cross section are rigidly connected into a whole and serve as anchoring points for longitudinal force transmission. The module is formed by assembling two main material fixing frames (2), an upper locking flange plate (3), a lower locking flange plate (6), a central connecting block (9) and a set of high-strength bolt connection pair (4). Further, the main material fixing frame (2) is a rectangular rigid frame and is a part directly contacted with the original structure. The inner side profile and the distance of the power transmission tower are precisely designed, so that the power transmission tower can be tightly attached to the outer surface of the main material (5) of the power transmission tower, and effective transmission of force is ensured. Each section constraint module uses two main material fixing frames (2) which are orthogonally overlapped at a 90-degree angle and are preliminarily connected with a main material (5) of the power transmission tower through fasteners (such as bolts) arranged on the frames of the main material fixing frames. Further, the upper locking flange (3) and the lower locking flange (6) are key components that constitute a module housing and provide an assembly reference. And the two are provided with limiting calipers (7) protru