Y-shaped power transmission tower angle steel non-destructive reinforcement structure and method

Abstract

This invention discloses a non-destructive reinforcement structure and method for Y-shaped transmission tower angle steel, relating to the field of transmission tower technology. The reinforcement structure includes: a Y-shaped reinforcement member with two reinforcement legs for attaching to the outer side of the main angle steel member of the transmission tower, and an outward extension extending from the connection point of the two reinforcement legs away from the main angle steel member; inner clamps with two inner clamps for attaching to the inner side of the main angle steel member; and two outer clamps, each outer clamp's shape matching a portion of the outer surface of one of the corresponding reinforcement legs and the outward extension, the two outer clamps together forming a structure for gripping the outward extension. This invention can improve the cooperative force transmission efficiency between the reinforcement member and the original main steel member.

Description

Technical Field

[0001] This invention relates to the field of power transmission tower technology, specifically to a non-destructive reinforcement structure and method for Y-shaped power transmission towers using angle steel. Background Technology

[0002] With the continuous expansion of power grid construction and the extension of service life, many early-built transmission towers are affected by environmental corrosion, material aging, fatigue accumulation, and extreme weather conditions. These towers commonly suffer from reduced load-bearing capacity, thinning of components due to corrosion, and loosening of joint connections. Under severe conditions such as strong winds and icing, they are prone to structural instability and even tower collapse, seriously threatening the safe and stable operation of transmission lines. To avoid the high costs and prolonged power outages associated with replacing entire towers, local reinforcement—adding reinforcing components to the outside of the original tower's main structure—has become an important technical means for the operation and maintenance of aging transmission towers.

[0003] Conventional angle steel reinforcement techniques for transmission towers in this field mainly involve connecting secondary angle steel members in parallel to the outer side of the original main member, and fixing them together using clamps or bolts. This increases the cross-sectional area of ​​the main member and provides elastic lateral support to improve the bending stiffness of the section, preventing the overall member from buckling and becoming unstable around its weak axis. However, conventional reinforcement techniques in this field still have the following shortcomings: Conventional reinforcement components often employ L-shaped cross-sections or segmented splicing structures, resulting in a relatively small overall moment of inertia and low local bending stiffness. During long-distance transportation, on-site hoisting, and high-altitude construction, weak points are prone to local bending and torsional deformation, leading to loose adhesion between the reinforcement and the original main material, affecting installation accuracy and structural stress performance. Conventional connecting clamps often use combinations of ordinary right-angle short angle steel, which can only achieve bidirectional clamping constraints on the reinforcement and cannot form multi-directional rigid locking, resulting in low efficiency of force transmission between the main reinforcement and the original main material. Conventional reinforcement structures cannot form a complete overall force-bearing system at the nodes, resulting in small effective bending cross-sections at the nodes and significant stress concentration. During long-term operation, problems such as bolt loosening and connection failure are prone to occur, making it difficult to meet the requirements for long-term safe operation of old transmission towers. Summary of the Invention

[0004] The purpose of this invention is to provide a non-destructive reinforcement structure that can improve the efficiency of force transmission between the reinforcement component and the original main material.

[0005] The objective of this invention is achieved through the following technical solution: This invention provides a non-destructive reinforcement structure for Y-shaped transmission tower angle steel, comprising: The reinforcement member is Y-shaped and has two reinforcing limbs for fitting against the outside of the main angle steel of the transmission tower, and an overhanging limb extending away from the connection point of the two reinforcing limbs away from the main angle steel. The inner clamp has two inner clamping legs for fitting against the inner side of the main material angle steel; Two external clamps, each with a shape matching a portion of the outer surface of a corresponding reinforcing limb and an extended limb, together form a structure for holding the extended limb. By setting up a reinforcing member with two reinforcing limbs and an extended limb, an inner clamp fitting against the inner side of the main material, and two outer clamps, the two outer clamps clamp the corresponding inner clamps respectively, and then lock them together to the extended limb to form a three-dimensional rigid clamping. This can construct a closed-loop linkage overall force-bearing system, breaking through the technical bottleneck of conventional two-way clamping, and improving the collaborative force transmission efficiency and structural stiffness of the reinforcing member and the main material.

[0006] Optionally, the reinforcement limb includes a first reinforcement limb and a second reinforcement limb; The inner clamping member includes a first inner clamping member and a second inner clamping member that are adapted to the inner angle of the main member angle steel. The first inner clamping member and the second inner clamping member are respectively used to fit the inner side of the first main member and the second main member of the main member angle steel. The external clamp includes a first external clamp and a second external clamp; The first external clamp has a first external clamping limb and a second external clamping limb connected at an obtuse angle. The first external clamping limb is used to fit against the outside of the first reinforcing limb and is fixedly connected to the first internal clamping limb to clamp the first main limb and the first reinforcing limb between the first internal clamping limb and the first external clamping limb. The second outer clamp has a third outer clamp and a fourth outer clamp connected at an obtuse angle. The third outer clamp is used to fit against the outside of the second reinforcing limb and is fixedly connected to the second inner clamp to clamp the second main limb and the second reinforcing limb between the second inner clamp and the third outer clamp. The second and fourth outer clamping limbs are respectively used to attach to and hold the two sides of the extended limb. By defining the three-limb connection form of the reinforcement, the right-angled inner clamping limb structure of the inner clamp, the obtuse-angled outer clamping limb structure of the double outer clamps, and the corresponding clamping and connection relationships, the cross-sectional shape of the equilateral angle steel main material can be accurately adapted to ensure that each clamping surface is fully attached, further improving the locking stability and force uniformity of the three-way rigid clamping.

[0007] Optionally, bolt holes are provided on the first inner clamp, the second inner clamp, the first outer clamp, the second outer clamp, the third outer clamp, the fourth outer clamp, and the extended limb; The first inner clamp and the first outer clamp are fixedly connected by a bolt passing between them; The second inner clamp and the third outer clamp are fixedly connected by a bolt passing through the two; The second outer clamp, the extended clamp, and the fourth outer clamp are fixedly connected by bolts passing through them, so that the second and fourth outer clamps can clamp and fix the extended clamp from both sides of the extended clamp. By setting matching bolt holes on each corresponding clamp and extended clamp, and using bolts to connect each component, a fully assembled non-destructive construction process can be achieved, eliminating the need for on-site welding. At the same time, it ensures that the locking force of each connection node is controllable and the stress is stable, improving construction efficiency and connection reliability.

[0008] Optionally, the leg width of the inner clamp is four-thirds to two times the leg width of the main angle steel. By limiting the length and leg width of the inner clamp, it is possible to ensure that the clamp has sufficient clamping rigidity and bolt installation space, while avoiding material waste, ensuring uniform distribution of clamping force, and improving the stability of the clamping structure.

[0009] Optionally, the inner clamp further includes a rib plate connected to the first and second inner clamping limbs. The rib plate is an isosceles right triangle, and the side length of the right angle of the rib plate is five-eighths to seven-eighths of the width of the main material angle steel. By providing a triangular rib plate of suitable size between the two clamping limbs of the inner clamp, the overall rigidity of the inner clamp can be greatly enhanced, preventing the clamp from deforming under the action of bolt clamping force and ensuring the long-term stability of the clamping and locking effect.

[0010] Optionally, the width of the first outer clamping leg is equal to the width of the third outer clamping leg, the width of the second outer clamping leg is equal to the width of the fourth outer clamping leg, and the width of the first outer clamping leg is greater than the width of the second outer clamping leg. By defining the width matching relationship and dimensional gradient of each clamping leg of the obtuse angle clamp, the force and stiffness of each clamping leg can be matched, ensuring the uniform transmission of clamping force and connection force, while achieving rational use of materials and reducing processing costs.

[0011] Optionally, the width of the second outer clamping leg and the width of the fourth outer clamping leg are both three-eighths to five-eighths of the width of the main material angle steel. By limiting the width range of the short legs of the clamp, it is possible to ensure that the short legs have sufficient connection strength to withstand the bolt tension while avoiding material waste and ensuring the stress stability of the connecting bolts.

[0012] Optionally, the tip of the first outer clamp is flush with the tip of the first inner clamp connected to it, the tip of the third outer clamp is flush with the tip of the second inner clamp connected to it, and the tip of the second outer clamp is flush with the tips of the extended clamp and the fourth outer clamp connected to it. By limiting the tip of each corresponding clamp to be flush, it is possible to facilitate rapid positioning during construction, improve installation accuracy and construction efficiency, and at the same time make the force-bearing length of each clamp consistent and the force more even, reducing stress concentration and the risk of bolt loosening.

[0013] Optionally, the reinforcing member is provided with a U-shaped hole for inserting a first existing bolt. This first existing bolt is the original bolt connecting the main angle steel to the non-main components of the transmission tower. The reinforcing member is connected to the main angle steel and the non-main components via this first existing bolt. By providing a U-shaped hole on the reinforcing member to accommodate the existing bolt, the existing bolts of the tower can be used directly to fix the joints of the reinforcing member, eliminating the need for drilling new holes in the original main material or disassembling non-main components. This achieves non-destructive reinforcement while ensuring the continuity of the reinforcing member's load-bearing capacity.

[0014] Optionally, the non-destructive reinforcement structure further includes: an insert adapted to the inner cavity size of the U-shaped hole. The insert is embedded in the U-shaped hole and has mating surfaces corresponding to the outer surface of the main angle steel and the inner surface of the head of the first original bolt, respectively. The insert is clamped and fixed between the main angle steel and the head of the first original bolt by the locking force of the first original bolt. By adding a suitable insert in the U-shaped hole, the gap in the U-shaped hole can be filled, the bolt clamping force can be evenly transmitted to the reinforcement, the stress-bearing area can be increased, stress concentration can be relieved, local deformation of the U-shaped hole can be avoided, and the load can be stably transmitted.

[0015] Optionally, the main body of the U-shaped hole has a groove on its side, and the main body of the plug-in has a protrusion on its side that matches the groove. When the plug-in is inserted into the U-shaped hole, the protrusion engages with the groove to limit the plug-in's position. By matching and engaging the groove of the U-shaped hole with the protrusion of the plug-in, precise positioning of the plug-in within the U-shaped hole can be achieved, preventing the plug-in from shifting during construction and operation, and further improving the stability and reliability of the node connection.

[0016] Optionally, the system also includes a mounting plate. The mounting plate connects the lower end of the reinforcement to the top of the base plate of the transmission tower. The lower end of the reinforcement is provided with a welded screw. The mounting plate has an upper hole and a lower hole. The upper hole is used to connect with the welded screw, and the lower hole is used to pass through a second existing bolt. The second existing bolt is the original bolt connecting the main angle steel to the base plate. The mounting plate is connected to the base plate and the main angle steel via the second existing bolt. By using the mounting plate in conjunction with the welded screw and the original anchor bolt, the lower end of the reinforcement is seamlessly connected to the tower base plate, allowing the load borne by the reinforcement to be directly transferred to the tower foundation, forming a stable anchor at the lower end and improving the overall load-bearing capacity of the reinforced structure.

[0017] Optionally, the upper end of the reinforcement member is connected to the polygonal connecting plate of the transmission tower. The upper end of the reinforcement member is provided with an upper hole for inserting a third existing bolt. The third existing bolt is the original bolt that connects the main angle steel and the polygonal connecting plate. The reinforcement member is connected to the main angle steel and the polygonal connecting plate through the third existing bolt. By extending the upper end of the reinforcement member to the polygonal connecting plate and fixing it with the existing bolt, the reinforcement member can form a continuous load-bearing system that runs vertically through the tower, avoiding the problem of weak nodes in segmented reinforcement and improving the cooperative load-bearing performance of the reinforcement member and the original main material.

[0018] Based on the same inventive concept, this invention also provides a non-destructive reinforcement method for angle steel of Y-shaped transmission towers, which, using the aforementioned non-destructive reinforcement structure, includes the following steps: The inner side plates of the two reinforcing limbs of the reinforcement are respectively attached to the outer side plates of the two main limbs of the main material angle steel; The outer side plates of the two inner clamping legs of the inner clamp are respectively attached to the inner side plates of the two main legs of the main material angle steel; Two external clamps are respectively set on the outside of the two reinforced limbs, so that the inner side plate of each external clamp is in contact with the outer side plate of the corresponding reinforced limb and the corresponding side plate of the extended limb; The two outer clamps are connected to the corresponding inner clamping legs of the inner clamp, and the two outer clamps are locked together with the extended legs, so that the inner clamp and the two outer clamps together form a three-dimensional rigid clamping of the reinforcement and the main angle steel. By installing the reinforcement and matching inner and outer clamps in stages and forming a multi-directional locking construction process, the entire process of non-destructive reinforcement of the angle steel of the transmission tower can be achieved without hot work, cutting and drilling, which greatly improves the efficiency and safety of high-altitude construction and ensures the installation accuracy and stress performance of the reinforced structure.

[0019] Optionally, the step of attaching the inner side plates of the two reinforcing limbs of the reinforcement member to the outer side plates of the two main limbs of the main member angle steel respectively further includes: At the connection node between the main material angle steel and the non-main material component, align the U-shaped hole on the reinforcing limb with the first existing bolt connecting the main material angle steel and the non-main material component; The insert is embedded into the U-shaped hole, and the insert is clamped between the head of the main angle steel and the head of the first original bolt using the first original bolt. The construction steps of fitting the original bolt into the U-shaped hole and locking it with the insert can achieve reliable fixation of the reinforcement at the intermediate node without disassembling non-main components or damaging the original structure, thus ensuring the coordinated force transmission effect at the node.

[0020] Optionally, the inner side plates of the two reinforcing limbs of the reinforcing member are respectively attached to the outer side plates of the two main limbs of the main angle steel, and then the process further includes: Extend the lower end of the reinforcement to the top of the base plate of the transmission tower; Align the upper hole of the mounting plate with the welding screw at the lower end of the reinforcement, and align the lower hole of the mounting plate with the second existing bolt connecting the main material angle steel and the base plate. Tighten the nuts on the welding bolts and the second original bolts to secure the reinforcement to the base plate using the mounting plate. This construction process, which uses the mounting plate in conjunction with the original bolts to anchor the lower end of the reinforcement to the base plate, achieves non-destructive fixing of the lower end of the reinforcement, directly transferring the reinforcement load to the foundation and improving the overall stability and load-bearing capacity of the reinforced structure.

[0021] Optionally, the inner side plates of the two reinforcing limbs of the reinforcing member are respectively attached to the outer side plates of the two main limbs of the main angle steel, and then the process further includes: Extend the upper end of the reinforcement to the connection between the main material angle steel and the polygonal connecting plate; Align the upper hole of the reinforcement with the third existing bolt that connects the main material angle steel and the polygonal connecting plate; Tighten the nut on the third existing bolt to secure the reinforcement to the main angle steel and polygonal connecting plate. By using the existing bolts to fix the upper end of the reinforcement to the polygonal connecting plate, a continuous load-bearing system can be formed, eliminating weak points in segmented reinforcement and further improving the overall reinforcement effect.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a non-destructive reinforcement structure for Y-shaped transmission tower angle steel, comprising: a reinforcement member having two reinforcement limbs that fit against the outer side of the main angle steel of the transmission tower, and an outward extension limb extending away from the main angle steel; an inner clamp having two inner clamping limbs that fit against the inner side of the main angle steel; a first outer clamp and a second outer clamp, which are respectively connected to the corresponding inner clamping limbs to form clamping of the reinforcement limbs and the main angle steel, and both are locked together with the outward extension limb to form a three-dimensional rigid clamping of the reinforcement member and the main angle steel.

[0023] This invention, by setting up a Y-shaped reinforcement member with two reinforcing limbs that fit against the outer side of the main angle steel of the transmission tower and an outwardly extending limb away from the main angle steel, fundamentally overcomes the long-standing technical prejudice in the field that "reinforcement members must be completely fitted to the main material to achieve effective reinforcement," and breaks through the structural limitations of conventional L-shaped reinforcement members. In the conventional understanding of those skilled in the art, the outwardly extending limb is an ineffective and redundant structure, wasting materials and potentially encroaching on the electrical safety clearance of the tower, thus having no motivation to set it up. However, this invention, through this outwardly extending limb, constructs the core force-bearing fulcrum of the third-direction constraint, providing the necessary structural foundation for forming a closed-loop rigid force-bearing system. This is a non-obvious structural improvement that those skilled in the art could not conceive of under conventional reinforcement thinking. Attached Figure Description

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0025] Figure 1 The three-dimensional non-destructive reinforcement structure according to an embodiment of the present invention Figure 1 ; Figure 2 The three-dimensional non-destructive reinforcement structure according to an embodiment of the present invention Figure 2 ; Figure 3 The three-dimensional non-destructive reinforcement structure according to an embodiment of the present invention Figure 3 ; Figure 4 This is a front view of a non-destructive reinforcement structure according to an embodiment of the present invention; Figure 5 yes Figure 4 Sectional view along the middle AA direction; Figure 6 The three-dimensional reinforcement according to an embodiment of the present invention Figure 1 ; Figure 7 yes Figure 6 Enlarged view of point B in the middle; Figure 8 The three-dimensional reinforcement according to an embodiment of the present invention Figure 2 ; Figure 9 This is a side view of the reinforcement according to an embodiment of the present invention; Figure 10 This is a perspective view of the inner clamp according to an embodiment of the present invention; Figure 11 This is a side view of the inner clamp according to an embodiment of the present invention; Figure 12 This is a perspective view of the first external clamp / second external clamp according to an embodiment of the present invention; Figure 13 This is a side view of the first external clamp / second external clamp according to an embodiment of the present invention; Figure 14 This is a perspective view of a plug-in according to an embodiment of the present invention; Figure 15 This is a front view of the plug-in according to an embodiment of the present invention; Figure 16 This is a schematic diagram of the connection between the reinforcement component and the base plate according to an embodiment of the present invention; Figure 17 This is a schematic diagram of the connection between the reinforcement component and the polygonal connecting plate according to an embodiment of the present invention; Figure 18 The deformation cloud diagram is of the main material angle steel that was not reinforced by the non-destructive reinforcement structure of this invention embodiment; Figure 19 yes Figure 18 The corresponding test curve; Figure 20 This is a deformation cloud diagram of the main material angle steel reinforced by the non-destructive reinforcement structure of this invention embodiment; Figure 21 yes Figure 20 The corresponding test curve; In the picture: 1. Reinforcing component; 101. First reinforcing limb; 102. Second reinforcing limb; 103. Outer extension limb; 104. U-shaped hole; 1041. Groove; 105. Welded bolt; 2. Main material angle steel; 201. First main limb; 202. Second main limb; 3. Inner clamp; 301. First inner clamp; 302. Second inner clamp; 303. Rib plate; 4. First outer clamp; 401. First outer clamp; 402. Second outer clamp; 5. Second outer clamp; 501. Third outer clamp; 502. Fourth outer clamp; 6. First existing bolt; 7. Non-main material component; 8. Insert; 801. Protrusion; 9. Base plate; 10. Plate; 11. Second existing bolt; 12. Polygonal connecting plate; 13. Third existing bolt. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments. The following embodiments are provided to better understand the present invention and are not intended to limit the preferred embodiments described. They do not constitute a limitation on the content and scope of protection of the present invention. Any product that is the same as or similar to the present invention, derived by any person under the guidance of the present invention or by combining the features of the present invention with other prior art, falls within the protection scope of the present invention.

[0027] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures, and should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate a location or positional relationship based on the location or positional relationship shown in the accompanying drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific location, or be constructed and operated in a specific location. Therefore, the terms describing positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting the present invention. The terms "connected," "linked," "connected," and "set" used in the present invention should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; they can refer to a direct connection or an indirect connection through intermediate components. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1 This invention provides a non-destructive reinforcement structure for Y-shaped transmission tower angle steel, comprising: Firmware 1, such as Figures 1-5 As shown in Figures 6 to 9, it is Y-shaped and has two reinforcing limbs for attaching to the outside of the main member angle steel 2 of the transmission tower, and an outward extension limb 103 extending from the connection point of the two reinforcing limbs away from the main member angle steel 2. Internal clamp 3, such as Figures 1-5 As shown in Figures 10 and 11, it has two inner clamping legs for fitting against the inner side of the main material angle steel 2; Two external clamps, such as Figures 1-5 As shown in Figures 12 and 13, the shape of each external clamp matches a portion of the outer surface of a corresponding reinforced limb and an extended limb 103, and the two external clamps together form a structure for holding the extended limb 103.

[0030] In specific implementation, the present invention uses the combination of the Y-shaped cross-section reinforcement 1 with the right-angle inner clamp and the obtuse-angle outer clamp to form a multi-directional rigid clamping of the main material angle steel 2, so that the reinforcement 1 and the main material angle steel 2 form an integral force-bearing system. In the force-bearing system: The main angle steel 2 is the structure requiring reinforcement for the transmission tower. It is the main load-bearing component of the transmission tower, bearing the vertical load, horizontal wind load, and icing load. The reinforcement component 1 adopts an integrated Y-shaped cross-section, consisting of a first reinforcement limb 101, a second reinforcement limb 102, and an outward extension limb 103 connected in a Y-shape. The first reinforcement limb 101 and the second reinforcement limb 102 are respectively attached to the outer sides of the first main limb 201 and the second main limb 202 of the main angle steel 2, directly increasing the cross-sectional area of ​​the main angle steel 2. The outward extension limb 103 extends away from the main angle steel 2 and is used to connect the first outer clamp 4 and the second outer clamp 5, forming a multi-directional constraint. The inner clamp 3 is a right-angle clamp, with the first inner clamp limb 301 and the second inner clamp limb 302 connected at 90 degrees, respectively attached to the inner sides of the first main limb 201 and the second main limb 202, serving as the inner support of the clamping structure. Both the first outer clamp 4 and the second outer clamp 5 are obtuse angle clamps. The first outer clamp limb 401 and the second outer clamp limb 402 are connected at approximately 135 degrees, and the third outer clamp limb 501 and the fourth outer clamp limb 502 are connected at approximately 135 degrees.

[0031] In actual production, the obtuse angle between the first outer clamp 4 and the second outer clamp 5 is about 135 degrees instead of strictly 135 degrees. The reasons include the following: (1) Manufacturing tolerance: The actual angle steel section is not ideal 90 degrees, and there are rounded corners and twisted deformation. The design of about 135 degrees can accommodate this manufacturing error; (2) Installation tolerance: During the bolt tightening process, the component will produce a small amount of elastic deformation. An angle of about 135 degrees can reserve deformation space to avoid interference between the clamp and the reinforcement 1; (3) Adaptability: The main body width and thickness of different models of towers are different. The angle of the outer extension 103 of the reinforcement 1 can be finely adjusted in the range of 130 degrees to 140 degrees according to the actual situation. 135 degrees is the optimal intermediate value.

[0032] Bolt holes on the first inner clamp 301, second inner clamp 302, first outer clamp 401, and third outer clamp 501 are preferably located on the centerline of each clamp, with the center of the hole located at the center of the clamp's width beyond the edge of the main clamp. Bolt holes on the second outer clamp 402, fourth outer clamp 502, and extension clamp 103 are preferably located on the centerline of each clamp, with the center of the hole located at the center of the clamp's width. The material and thickness of the first reinforcing clamp 101, second reinforcing clamp 102, extension clamp 103, first inner clamp 301, second inner clamp 302, first outer clamp 401, second outer clamp 402, third outer clamp 501, and fourth outer clamp 502 are preferably completely consistent with those of the first main clamp 201 and second main clamp 202 to ensure matching mechanical properties of each component and to guarantee the same coefficient of thermal expansion and contraction and electrochemical performance.

[0033] By locking the first outer clamp 4 and the second outer clamp 5 together with the extended limb 103 of the reinforcement 1, a three-dimensional rigid clamping is formed on the reinforcement 1 and the main material angle steel 2. This enables the inner clamp 3, the first outer clamp 4, the second outer clamp 5 and the reinforcement 1 to form a closed triangular rigid force ring, completely breaking through the technical bottleneck of conventional two-way clamping structures in this field, and realizing three mutually orthogonal, closed-loop linked rigid constraints: The above-mentioned three-dimensional rigid clamping structure can constrain the opening expansion deformation of the main material angle steel 2, the overall slippage of the reinforcement 1, and the torsional deformation around the angle steel axis, which cannot be solved by the existing L-shaped reinforcement bidirectional clamping. It can make all three limbs of the reinforcement 1 participate in the overall force, while the non-L-shaped reinforcement only has the first reinforcement limb 101 and the second reinforcement limb 102 subjected to scattered forces. This significantly shortens the load transfer path, reduces the stress concentration coefficient at the nodes, reduces the risk of bolt loosening and connection failure during long-term operation, and significantly improves the long-term operational reliability and structural safety of the reinforcement structure. Through the above-mentioned three-dimensional rigid clamping structure, the reinforcement component 1 and the main material angle steel 2 can form a completely synchronized overall force system, rather than the separate force mode of "main material bearing the main force and reinforcement component bearing the auxiliary force" in the conventional reinforcement scheme. This achieves synchronous force and coordinated deformation of the reinforcement component 1 and the main material angle steel 2, fundamentally solving the core problems of insufficient bearing capacity and high risk of instability that still exist after the reinforcement of old transmission towers. By combining the Y-shaped reinforcement 1 with the overall structure of three-way rigid clamping, complete non-destructive reinforcement can be achieved. No destructive operations such as drilling, cutting, or hot work are required on the original main material angle steel 2. The integrity and original load-bearing capacity of the original tower structure are completely preserved. This completely avoids the problems of cross-section weakening, increased corrosion risk, and secondary damage caused by opening holes in the original structure in conventional reinforcement schemes. It significantly reduces the safety risks of high-altitude construction and the need for power outage operations, and has extremely strong engineering application value.

[0034] Regarding the problem of low bending stiffness and easy deformation of traditional reinforced components: This invention adopts an integrated Y-shaped section, which can effectively improve the moment of inertia of the section compared with the L-shaped section, and significantly improve the local bending stiffness. It is not easy to bend or twist during transportation, hoisting and construction, and ensures the fitting accuracy between the reinforcement component 1 and the main material angle steel 2.

[0035] To address the issues of insufficient clamping constraints and low collaborative force transmission efficiency in traditional clamping techniques, this invention employs a combination of a right-angled inner clamp and two obtuse-angled outer clamps to form a three-dimensional rigid clamping of the reinforcement 1. Compared to conventional bidirectional clamping, the collaborative force transmission efficiency can be effectively improved.

[0036] Regarding the problem of poor overall stress performance of traditional nodes: the reinforcement 1 of this invention forms an integral clamping structure with the fixture, and the effective bending cross section at the node is increased, thereby reducing the stress concentration factor and reducing the risk of bolt loosening and connection failure.

[0037] Based on the above design, the integrated Y-shaped cross-section reinforcement 1 of the present invention has higher overall stiffness, less deformation during transportation and construction, high installation accuracy, and uniform structural stress. The three-dimensional rigid clamping structure makes the synergistic force transmission efficiency between the reinforcement 1 and the main material angle steel 2 higher, the load transmission path is shorter, and the overall bearing capacity can be significantly improved. The closed clamping ring structure makes the node form a complete overall force system, the stress distribution is more uniform, and the connection reliability is higher during long-term operation.

[0038] Preferably, the reinforcing limb includes a first reinforcing limb 101 and a second reinforcing limb 102; the inner clamping limb includes a first inner clamping limb 301 and a second inner clamping limb 302 adapted to the inner angle of the main member angle steel 2, the first inner clamping limb 301 and the second inner clamping limb 302 being respectively used to fit against the inner sides of the first main member 201 and the second main member 202 of the main member angle steel 2; the outer clamp includes a first outer clamp 4 and a second outer clamp 5; the first outer clamp 4 has a first outer clamping limb 401 and a second outer clamping limb 402 connected at an obtuse angle, the first outer clamping limb 401 being used to fit against the outer side of the first reinforcing limb 101 and to connect with the first inner clamping limb 301. 1. A fixed connection is provided to clamp the first main limb 201 and the first reinforcing limb 101 between the first inner clamping limb 301 and the first outer clamping limb 401; the second outer clamp 5 has a third outer clamping limb 501 and a fourth outer clamping limb 502 connected at an obtuse angle. The third outer clamping limb 501 is used to fit against the outside of the second reinforcing limb 102 and is fixedly connected to the second inner clamping limb 302 to clamp the second main limb 202 and the second reinforcing limb 102 between the second inner clamping limb 302 and the third outer clamping limb 501; the second outer clamping limb 402 and the fourth outer clamping limb 502 are respectively used to fit against and hold the two sides of the extended limb 103.

[0039] By clarifying the specific structures of the first reinforcing limb 101 and the second reinforcing limb 102 of the Y-shaped reinforcement 1, compared with the L-shaped reinforcement commonly used in this field, the overall cross-sectional moment of inertia and bending and torsional stiffness of the reinforcement 1 can be significantly improved. This avoids local bending and torsional deformation of the reinforcement 1 during long-distance transportation, on-site hoisting, and high-altitude construction, ensuring the surface contact and fitting accuracy between the reinforcement 1 and the main angle steel 2. This addresses the industry pain points of insufficient stiffness of L-shaped reinforcements, such as poor fitting, uneven stress, and significant reduction in reinforcement effect. At the same time, by using the first inner clamping limb 301 and the second inner clamping limb 302, which are adapted to the inner angle of the main angle steel 2, and fitting them to the inner side of the first main limb 201 and the second main limb 202 of the main angle steel 2, a stable inner rigid support can be provided for the outer clamping structure, forming a two-way clamping force base, and preventing the main angle steel 2 from buckling and deforming inside during bolt tightening. This ensures uniform support stiffness in both orthogonal clamping directions, providing a stable force reference for subsequent closed-loop three-dimensional rigid clamping. Furthermore, by defining the obtuse-angled double-limb structure of the first outer clamp 4 and the second outer clamp 5, the outer clamps are fixedly connected to their corresponding inner clamps to form a double-sided clamping of the main angle steel 2 and the reinforcing limbs. The second outer clamp limb 402 of the first outer clamp 4 and the fourth outer clamp limb 502 of the second outer clamp 5 are attached to and tightly embrace both sides of the extended limb 103. This enables a surface-contact rigid locking of the first main limb 201 and the second main limb 202 of the main angle steel 2 with the first reinforcing limb 101 and the second reinforcing limb 102 of the reinforcement 1. This allows the reinforcement 1 and the main angle steel 2 to form a preliminary collaborative force-bearing system in two orthogonal thickness normal directions, ensuring the effective transfer of vertical loads, horizontal wind loads, and icing loads between the reinforcement 1 and the main angle steel 2, and preventing structural warping and deformation caused by uneven force distribution on one side.

[0040] More preferably, bolt holes are provided on the first inner clamp 301, the second inner clamp 302, the first outer clamp 401, the second outer clamp 402, the third outer clamp 501, the fourth outer clamp 502, and the extended limb 103; the first inner clamp 301 and the first outer clamp 401 are fixedly connected by bolts passing through them; the second inner clamp 302 and the third outer clamp 501 are fixedly connected by bolts passing through them; the second outer clamp 402, the extended limb 103, and the fourth outer clamp 502 are fixedly connected by bolts passing through them, so as to achieve the clamping and fixing of the second outer clamp 402 and the fourth outer clamp 502 to the extended limb 103 from both sides.

[0041] The bolt locking achieves stable clamping and fixing of the outrigger 103, enabling the inner clamp 3, the first outer clamp 4, the second outer clamp 5 and the reinforcement 1 to form a complete closed-loop three-dimensional rigid clamping system, further enhancing the synergistic force transmission efficiency between the reinforcement 1 and the main material angle steel 2; at the same time, the use of all-bolt assembly connection eliminates the need for on-site hot work, drilling and cutting operations, ensuring that the locking force of each connection node is controllable and the force is uniform and stable, reducing the risk of bolt loosening and connection failure during long-term operation, and taking into account both the construction convenience and long-term operational reliability of the reinforcement structure.

[0042] Furthermore, the width of the inner clamp 3 is four-thirds to two times the width of the main material angle steel 2.

[0043] In practical implementation, by rationally designing the length and leg width of the inner clamp 3, sufficient clamping rigidity can be ensured while avoiding material waste. The length of the inner clamp 3 is consistent with (approximately equal to) the leg width of the main angle steel 2, ensuring sufficient clamping area. The leg width of the inner clamp 3 is four-thirds to two times the leg width of the main angle steel 2, preferably five-thirds, meaning the leg width of the inner clamp 3 exceeds two-thirds of the leg width of the main angle steel 2. The portion exceeding the leg width of the main angle steel 2 is used for setting bolt holes, connecting the first outer clamp 4 and the second outer clamp 5. This size range ensures sufficient space for bolt holes while avoiding material waste caused by an excessively large inner clamp 3. The bolt holes are preferably located in the middle of the portion of the inner clamp 3 exceeding the leg width of the main angle steel 2, allowing the clamping force of the bolts to be evenly distributed on the inner clamp 3. The length of the inner clamp 3 can be consistent with the leg width of the main angle steel 2.

[0044] Furthermore, the inner clamp 3 also has a rib plate 303 connected to the first inner clamping leg 301 and the second inner clamping leg 302. The rib plate 303 is an isosceles right triangle, and the length of the right-angled side of the rib plate 303 is five-eighths to seven-eighths of the leg width of the main material angle steel 2.

[0045] In practical implementation, the rib plate 303 enhances the overall rigidity of the inner clamp 3, preventing deformation under bolt clamping force. The rib plate 303 is an isosceles right triangle, with the side length being five-eighths to seven-eighths of the width of the main angle steel leg 2, preferably six-eighths or three-quarters. This size range ensures that the rib plate 303 has sufficient reinforcing effect while avoiding material waste and construction interference caused by an excessively large rib plate 303.

[0046] Furthermore, the width of the first external clamp 401 is equal to the width of the third external clamp 501, the width of the second external clamp 402 is equal to the width of the fourth external clamp 502, and the width of the first external clamp 401 is greater than the width of the second external clamp 402.

[0047] In practical implementation, by rationally designing the width of each clamping leg of the first outer clamp 4 and the second outer clamp 5, the force on each clamping leg is made uniform, while also achieving rational use of materials. The first outer clamp 4 and the second outer clamp 5 preferably have the same structure, allowing them to be processed using the same mold, reducing processing costs; simultaneously, there is no need to distinguish between the two clamps during construction, improving construction efficiency. The first outer clamping leg 401 and the third outer clamping leg 501 mainly bear the clamping force and require greater rigidity, hence their wider legs; the second outer clamping leg 402 and the fourth outer clamping leg 502 mainly bear the connecting force and experience less force, hence their narrower legs. This design ensures that the force and rigidity of each clamping leg are matched, while avoiding material waste.

[0048] Furthermore, the width of the second outer clamping leg 402 and the width of the fourth outer clamping leg 502 are both three-eighths to five-eighths of the width of the main material angle steel 2.

[0049] In specific implementation, the width of the second outer clamping leg 402 and the fourth outer clamping leg 502 is three-eighths to five-eighths of the width of the main angle steel leg 2, preferably four-eighths, or one-half. This size range ensures that the short leg has sufficient connection strength to withstand the tensile force of the connecting bolt, while avoiding material waste caused by excessively wide short legs. Holes for bolts are provided in the middle of the second outer clamping leg 402 and the fourth outer clamping leg 502, and the distance from the center of the hole to the end of the short leg is preferably one-half the width of the short leg.

[0050] Furthermore, such as Figure 5 As shown, the tip of the first external clamp 401 is flush with the tip of the first internal clamp 301 connected to it, the tip of the third external clamp 501 is flush with the tip of the second internal clamp 302 connected to it, and the tip of the second external clamp 402 is flush with the tip of the external extension 103 connected to it and the tip of the fourth external clamp 502.

[0051] In practice, the tips of all clamping limbs are flush, facilitating positioning through visual observation during construction and improving construction efficiency and installation accuracy. The flush tip of each clamping limb ensures that the force-bearing length of each limb is the same, resulting in more even force distribution and preventing stress concentration caused by differences in limb length. Furthermore, the flush tip of each clamping limb ensures more even force distribution on the connecting bolts, reducing the risk of bolt loosening.

[0052] Furthermore, such as Figures 1-4 As shown in Figures 6-8, the reinforcing member is provided with a U-shaped hole 104. The U-shaped hole 104 is used to pass through the first original bolt 6. The first original bolt 6 is the original bolt that connects the main material angle steel 2 and the non-main material component 7 of the transmission tower. The reinforcing member is connected to the main material angle steel 2 and the non-main material component 7 through the first original bolt 6.

[0053] In practice, the existing bolts 6 on the original tower that connect the main angle steel 2 and the non-main component 7 are used to connect the reinforcement 1 to the main angle steel 2 and the non-main component 7 as a whole, achieving non-destructive reinforcement without cutting or drilling the original tower. The non-main component 7 may include various metal components on the transmission tower other than the main angle steel 2, such as diagonal members, auxiliary members, and crossarm supports.

[0054] The U-shaped hole 104 is an open hole that can be directly fitted onto the existing first bolt 6 without disassembling the non-main component 7 or drilling holes in the main component angle steel 2. Simply loosen the first existing bolt 6, install the reinforcement 1 in place, and then tighten it again. During construction, there is no need to stop the power or disassemble the non-main component 7, resulting in a short construction period and minimal impact on the operation of the power transmission line. Furthermore, there is no need to cut or drill holes in the original structure, avoiding damage to the original structure and ensuring its integrity. The reinforcement 1 remains continuous at this node, and the overall stress performance at the node is better than that of traditional solutions.

[0055] Furthermore, such as Figures 1-4 As shown in Figures 6-8 and 14-15, the non-destructive reinforcement structure also includes a plug-in 8 that is adapted to the inner cavity size of the U-shaped hole 104. The plug-in 8 is embedded in the U-shaped hole 104. The plug-in 8 has mating surfaces that correspond to the outer side of the main material angle steel 2 and the inner side of the bolt head of the first original bolt 6, respectively. The plug-in 8 is clamped and fixed between the main material angle steel 2 and the bolt head of the first original bolt 6 by the locking force of the first original bolt 6.

[0056] In practice, the insert 8 fills the gap in the U-shaped hole 104, allowing the original bolt 6 to clamp the reinforcement 1 and ensure effective load transfer. Without the insert 8, the gap in the U-shaped hole 104 means that after the original bolt 6 is tightened, the reinforcement 1 and the main material angle steel 2 are only stressed at the bolt contact point, resulting in a small stress-bearing area and potential stress concentration. After the insert 8 fills the gap in the U-shaped hole 104, the clamping force of the original bolt 6 is evenly distributed across the entire sidewall of the U-shaped hole 104 through the insert 8. This increases the stress-bearing area, alleviates stress concentration, and ensures more uniform load transfer, preventing localized deformation of the U-shaped hole 104.

[0057] Preferably, during the manufacturing process, the thickness of the plug-in 8 is consistent with the thickness of the reinforcing limb, ensuring that the surfaces of the plug-in 8 and the reinforcing member 1 are flush. The length of the plug-in 8 is less than the diameter of one of the original bolts 6 in the U-shaped hole 104, just filling the gap in the U-shaped hole 104 excluding the original bolts 6, ensuring that the plug-in 8 fits tightly against the sidewall of the U-shaped hole 104.

[0058] Furthermore, the main body of the U-shaped hole 104 has a groove 1041 on its side, and the main body of the plug-in 8 has a protrusion 801 that matches the groove 1041 on its side. When the plug-in 8 is inserted into the U-shaped hole 104, the protrusion 801 is inserted into the groove 1041 to limit the plug-in 8.

[0059] In practical implementation, the precise positioning of the insert 8 within the U-shaped hole 1044 is achieved through the cooperation of the groove 1041 and the protrusion 801, preventing displacement of the insert 8 during construction and operation. The groove 1041 is preferably semi-circular, and the protrusion 801 is preferably semi-circular. Two grooves 1041 are preferably provided, respectively on two opposite main body sides of the U-shaped hole 104; two protrusions 801 are correspondingly provided on two opposite main body sides of the insert 8, and the dimensions of the protrusions 801 are adapted to those of the grooves 1041.

[0060] Furthermore, such as Figure 16 As shown, it also includes a mounting plate 10, which is used to connect the lower end of the reinforcement 1 to the top of the base plate 9 of the transmission tower. The lower end of the reinforcement 1 is provided with a welding screw 105. The mounting plate 10 is provided with an upper hole and a lower hole. The upper hole is used to connect with the welding screw 105, and the lower hole is used to pass through and connect the second original bolt 11. The second original bolt 11 is the original bolt that connects the main material angle steel 2 and the base plate 9. The mounting plate 10 is connected to the base plate 9 and the main material angle steel 2 through the second original bolt 11.

[0061] In practice, the welding screw 105 is vertically welded to the end face of the lower end of the reinforcement 1. The upper hole of the plate 10 is fitted onto the welding screw 105, and the lower hole is fitted onto the second original bolt 11. By tightening the nut on the welding screw 105 and the nut on the second original bolt 11, the plate 10 can be fixedly connected to the reinforcement 1 and the foot plate 9 respectively.

[0062] By connecting the lower end of the reinforcement member 1 to the base plate 9 via the mounting plate 10, the lower end of the reinforcement member 1 can be further secured, allowing the load of the reinforcement member 1 to be directly transferred to the tower foundation. This connection method eliminates the need for cutting or drilling into the original structure of the transmission tower; the connection can be achieved using only the existing second bolt 11, ensuring the integrity of the original structure. The mounting plate 10, acting as a transition component, evenly distributes the load of the reinforcement member 1 to the base plate 9, preventing load concentration in localized areas.

[0063] Furthermore, such as Figure 17 As shown, the upper end of the reinforcement 1 is connected to the polygonal connecting plate 12 of the transmission tower. The upper end of the reinforcement 1 is provided with an upper hole for passing through the upper hole. The third original bolt 13 is the original bolt that connects the main material angle steel 2 and the polygonal connecting plate 12. The reinforcement 1 is connected to the main material angle steel 2 and the polygonal connecting plate 12 through the third original bolt 13.

[0064] In practical implementation, the main angle steel 2 here refers to the main angle steel of the part to be reinforced, that is, a section of main angle steel from the top of the base plate 9 to the bottom of the polygonal connecting plate 12. The polygonal connecting plate 12 is a component that connects the two sections of main angle steel and components such as crossbeams and diagonal members. It is usually a quadrilateral or hexagonal steel plate and is connected to each component by bolts.

[0065] Extending the upper end of the reinforcement member 1 to the connection point between the main angle steel 2 and the polygonal connecting plate 12, the connection can be achieved using the existing third bolt 13. Building upon the connection of the lower end of the reinforcement member 1 to the top of the anchor plate 9, further connecting the reinforcement member 1 to the main angle steel 2 and the polygonal connecting plate 12 using the third existing bolt 13 allows the reinforcement member 1 to form a continuous load-bearing system from top to bottom. The reinforcement member 1 runs through the entire section to be reinforced from top to bottom without any breaks, forming a continuous load-bearing component. This allows the load to be continuously transferred from top to bottom, effectively avoiding the weak node problems caused by segmented reinforcement.

[0066] The reinforcement structure provided in this embodiment adopts an integrated Y-shaped cross-section reinforcement member 1. The two limbs of the reinforcement member 1 are tightly fitted with the main material angle steel 2, and can be embedded in the reinforcement member 1 through U-shaped holes 104, avoiding interference from complex nodes on the continuity of the reinforcement member 1, forming a non-destructive reinforcement system that is highly adapted to the original tower spatial shape, fundamentally solving the problems of poor bending resistance, easy interference, and the need for cutting limbs in traditional technologies. The upper and lower ends of the reinforcement member 1 of this invention can be non-destructively connected to the main material angle steel 2, ensuring the cooperative force-bearing efficiency of the reinforcement member 1 and the main material angle steel 2, and improving the reinforcement effect. The reinforcement member 1 of this invention can be directly bolted using the original bolt holes of the transmission tower without additional drilling. The intermediate nodes are locked with multiple constraints through 8 plugs and clamps, so that the reinforcement member 1, the main material angle steel 2, and the clamps form a combined force-bearing system, significantly improving the bending section modulus and cooperative force transmission efficiency of the nodes.

[0067] Example 2 Based on the same inventive concept, this invention also provides a non-destructive reinforcement method for angle steel of Y-shaped transmission towers, which adopts a non-destructive reinforcement structure and includes the following steps: The inner side plates of the two reinforcing members 1 are respectively attached to the outer side plates of the two main members of the main material angle steel 2; The outer side plates of the two inner clamping legs of the inner clamp 3 are respectively attached to the inner side plates of the two main legs of the main material angle steel 2; Two external clamps are respectively set on the outside of the two reinforced limbs, so that the inner side plate of each external clamp is in contact with the outer side plate of the corresponding reinforced limb and the corresponding side plate of the extension limb 103. The two outer clamps are connected to the corresponding inner clamps of the inner clamp 3, and the two outer clamps are locked together with the outer extension 103, so that the inner clamp 3 and the two outer clamps together form a three-dimensional rigid clamping of the reinforcement 1 and the main material angle steel 2.

[0068] In practice, before construction: first clean the rust, oil stains and debris on the surface of the main material angle steel 2 to ensure that the mating surface of the reinforcement 1 and the main material angle steel 2 is clean and flat.

[0069] When installing the reinforcement component 1: the reinforcement component 1 can be hoisted into place along the longitudinal direction of the main material angle steel 2, so that the first reinforcement limb 101 and the second reinforcement limb 102 are tightly attached to the first main limb 201 and the second main limb 202 respectively. At this time, temporary clamps can be used to fix the reinforcement component 1 to the main material angle steel 2.

[0070] When installing the inner clamp 3: the inner clamp 3 can be placed inside the main material angle steel 2, so that the first inner clamp limb 301 and the second inner clamp limb 302 are tightly fitted with the inner sides of the first main limb 201 and the second main limb 202 respectively. Adjust the position of the inner clamp 3 so that the center line of the inner clamp 3 is aligned with the center line of the reinforcement 1.

[0071] When installing the first outer clamp 4: the first outer clamp 4 can be placed on the outside of the first reinforcing limb 101, so that the first outer clamp 401 is aligned with the first inner clamp 301, the connecting bolt is inserted, and the nut is initially tightened.

[0072] When installing the second outer clamp 5: the second outer clamp 5 can be placed on the outside of the second reinforcing limb 102, so that the third outer clamp limb 501 is aligned with the second inner clamp limb 302, the connecting bolt is inserted, and the nut is initially tightened; then the bolts connecting the second outer clamp limb 402, the fourth outer clamp limb 502 and the outer extension limb 103 are inserted, and the nut is initially tightened.

[0073] When tightening bolts: tighten all connecting bolts in a diagonal order, ensuring the tightening torque meets the relevant specifications, and then remove the temporary clamps.

[0074] Furthermore, the inner side plates of the two reinforcing limbs of the reinforcing member 1 are respectively attached to the outer side plates of the two main limbs of the main member angle steel 2, which also includes: At the connection node between the main material angle steel 2 and the non-main material component 7, align the U-shaped hole 104 on the reinforcing limb with the first original bolt 6 connecting the main material angle steel 2 and the non-main material component 7. Insert the plug 8 into the U-shaped hole 104 and clamp the plug 8 between the head of the main material angle steel 2 and the head of the first original bolt 6 using the first original bolt 6.

[0075] In practice, first loosen the nut of the first original bolt 6, and remove part of the thread of the first original bolt 6, with the removal length not less than the sum of the thickness of the reinforcement 1 and the thickness of the plug-in 8; then adjust the position of the reinforcement 1 so that the U-shaped hole 104 on the first reinforcement limb 101 and / or the second reinforcement limb 102 is aligned with the first original bolt 6, and fit the U-shaped hole 104 onto the first original bolt 6; then insert the plug-in 8 into the U-shaped hole 104 from the opening of the U-shaped hole 104, so that the protrusion 801 of the plug-in 8 is aligned and engaged with the groove 1041 of the U-shaped hole 104; finally, reset the nut of the first original bolt 6, and tighten the first original bolt 6 according to the specified tightening torque, so that the plug-in 8 is clamped between the main material angle steel 2 and the head of the first original bolt 6.

[0076] Furthermore, the inner side plates of the two reinforcing limbs of the reinforcing member 1 are respectively attached to the outer side plates of the two main limbs of the main member angle steel 2, and then the process further includes: Extend the lower end of the reinforcement member 1 to the top of the base plate 9 of the transmission tower; Align the upper hole of the mounting plate 10 with the welding screw 105 at the lower end of the reinforcement 1, and align the lower hole of the mounting plate 10 with the second original bolt 11 that connects the main material angle steel 2 and the foot plate 9. Tighten the nuts on the welding screw 105 and the second original bolt 11 to fix the reinforcement 1 to the foot plate 9 through the plate 10.

[0077] In practice, first clean the rust, oil, and debris from the surface of the base plate 9 to ensure that the mating surface of the mounting plate 10 and the base plate 9 is clean and flat. Then, extend the lower end of the reinforcement 1 to the top of the base plate 9 and adjust the verticality of the reinforcement 1 so that the center line of the reinforcement 1 is aligned with the center line of the main material angle steel 2. Next, place the mounting plate 10 at the connection between the reinforcement 1 and the base plate 9, so that the upper hole of the mounting plate 10 is aligned with the welding screw 105 at the lower end of the reinforcement 1, and the lower hole is aligned with the second original bolt 11 connecting the main material angle steel 2 and the base plate 9. Finally, tighten the nuts on the welding screw 105 and the second original bolt 11 in sequence, ensuring that the tightening torque meets the relevant specifications, and fix the mounting plate 10 to the reinforcement 1 and the base plate 9 respectively.

[0078] Furthermore, the inner side plates of the two reinforcing limbs of the reinforcing member 1 are respectively attached to the outer side plates of the two main limbs of the main member angle steel 2, and then the process further includes: Extend the upper end of the reinforcement 1 to the connection between the main material angle steel 2 and the polygonal connecting plate 12; Align the upper hole of the reinforcement 1 with the third original bolt 13 that connects the main material angle steel 2 and the polygonal connecting plate 12; Tighten the nut on the third original bolt 13 to fix the reinforcement 1 to the main material angle steel 2 and the polygonal connecting plate 12.

[0079] In practice, first clean the rust, oil, and debris from the surface of the polygonal connecting plate 12 to ensure that the mating surface of the reinforcement 1 and the polygonal connecting plate 12 is clean and flat. Then, extend the upper end of the reinforcement 1 to the connection point between the main angle steel 2 and the polygonal connecting plate 12, adjust the position of the reinforcement 1 so that the upper end hole of the reinforcement 1 is aligned with the third original bolt 13 connecting the main angle steel 2 and the polygonal connecting plate 12. Then, loosen the nut of the third original bolt 13 and remove part of the screw of the third original bolt 13, with the removal length not less than the thickness of the reinforcement 1. Then, attach the upper end of the reinforcement 1 to the surface of the polygonal connecting plate 12 so that the third original bolt 13 passes through the upper end hole of the reinforcement 1. Finally, reset the nut of the third original bolt 13 and tighten the third original bolt 13 according to the specified tightening torque to fix the reinforcement 1 to the main angle steel 2 and the polygonal connecting plate 12.

[0080] The entire construction process using the above reinforcement methods involves no on-site cutting, no hot work, no drilling, and no damage to the original tower components. It fully preserves the integrity and load-bearing capacity of the original structure, while significantly improving construction efficiency and safety.

[0081] Based on Embodiments 1 and 2, it can be seen that the present invention: First, it can significantly improve the overall bending resistance of the reinforced structure and completely solve the problem of component deformation. This invention uses an integrated Y-shaped cross-section reinforcement member 1, which includes a first reinforcing limb 101, a second reinforcing limb 102, and an overhanging limb 103 connected in a Y-shape. Compared with existing segmented reinforcement members, its overall cross-sectional moment of inertia and bending stiffness are significantly improved. Calculations show that the bending bearing capacity of the weak section of the reinforcement member 1 is increased by 88% (e.g., ...). Figures 18-19 The maximum bearing capacity before reinforcement was 111.3 kN; Figures 20-21 The maximum load-bearing capacity after reinforcement is 210.3 KN; the load-bearing capacity increase = (210.3-111.3) / 111.3 = 88.9%. The construction of the overall force-bearing system of the reinforcement component 1 effectively avoids local bending and torsional deformation caused by bumps and squeezing during transportation and by hoisting and alignment during construction, ensuring the fitting accuracy between the reinforcement component 1 and the main material angle steel 2, thus guaranteeing the reliability of the reinforced structure from the source, and adapting to the wind load, icing load and maintenance load that the transmission tower bears for a long time.

[0082] Secondly, it achieves truly non-destructive reinforcement while completely preserving the structural integrity of the original tower. Through the Y-shaped bifurcation avoidance design of the reinforcement component 1, the precise adaptation of the U-shaped holes 104 on the first reinforcement limb 101 and the second reinforcement limb 102, and the local optimization of the cutting limbs at the upper and lower ends of the reinforcement component 1, this invention completely avoids spatial interference between the reinforcement component and the original non-main material component 7 of the tower, without requiring any destructive treatment such as cutting, grinding, or cutting the original component. At the same time, the lower end of the reinforcement component 1 is connected to the second original bolt 11 and the base plate 9 through the mounting plate 10 and the welding screw 105, and the upper end of the reinforcement component 1 is connected to the polygonal connecting plate 12 through the third original bolt 13. The upper and lower ends are directly connected using the original bolt holes of the main material angle steel 2 without adding new holes. The effective cross-section and load-bearing capacity retention rate of the original tower structure reaches 100%, which completely solves the problem of secondary damage and increased corrosion risk of the original tower caused by construction damage in traditional technologies, and meets the core requirements of "restoring the old as before and safe operation and maintenance" for old power grid facilities.

[0083] Third, it can significantly optimize the performance of node connections and enhance the synergistic stress-bearing effect of main and auxiliary materials. At the intermediate node, the embedded fit of the plug 8 and the U-shaped hole 104 allows the first original bolt 6 connecting the main material angle steel 2 and the non-main material component 7 to pass through the U-shaped hole 104 and the plug 8. The protrusion 801 of the plug 8 precisely engages with the groove 1041 of the U-shaped hole 104. Combined with the multi-directional locking and fixing of the inner clamp 3, the first outer clamp 4, and the second outer clamp 5, the reinforcement 1, the main material angle steel 2, the inner clamp 3, the first outer clamp 4, and the second outer clamp 5 form an integrated combined stress-bearing system. This design increases the effective bending section modulus at the node by more than 40%, significantly reduces stress concentration, and avoids the hidden dangers of bolt loosening and weld cracking in traditional technologies.

[0084] Fourth, it simplifies the construction process and improves construction efficiency and safety. The reinforcement structure of this invention adopts a prefabricated design. The reinforcement component 1, inner clamp 3, first outer clamp 4, second outer clamp 5, plug-in 8, and mounting plate 10 are all prefabricated components. The accompanying non-destructive construction method eliminates the need for hot work, significantly improving construction efficiency compared to traditional technologies. Furthermore, the absence of hot work and destructive operation completely eliminates the fire risk of hot work at heights and the hazard of falling debris from cutting materials, greatly reducing the difficulty of safety management at the construction site and making it suitable for complex construction environments at high altitudes and in the field for power transmission towers.

[0085] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention.

Claims

1. A non-destructive reinforcement structure for Y-shaped transmission tower angle steel, characterized in that, include: The reinforcement member (1) is Y-shaped and has two reinforcing limbs for fitting to the outside of the main angle steel (2) of the transmission tower, and an extension limb (103) extending from the connection point of the two reinforcing limbs away from the main angle steel (2). The inner clamp (3) has two inner clamping legs for fitting against the inner side of the main material angle steel (2); Two external clamps, each with a shape that matches a portion of the outer surface of a corresponding reinforced limb and an extended limb (103), together forming a structure for holding the extended limb (103).

2. The non-destructive reinforcement structure according to claim 1, characterized in that: The reinforcement limb includes a first reinforcement limb (101) and a second reinforcement limb (102); The inner clamping limb includes a first inner clamping limb (301) and a second inner clamping limb (302) adapted to the inner angle of the main material angle steel (2). The first inner clamping limb (301) and the second inner clamping limb (302) are respectively used to attach to the inner side of the first main limb (201) and the second main limb (202) of the main material angle steel (2); The external clamp includes a first external clamp (4) and a second external clamp (5); The first external clamp (4) has a first external clamping limb (401) and a second external clamping limb (402) connected at an obtuse angle. The first external clamping limb (401) is used to fit against the outside of the first reinforcing limb (101) and is fixedly connected to the first internal clamping limb (301) to clamp the first main limb (201) and the first reinforcing limb (101) between the first internal clamping limb (301) and the first external clamping limb (401). The second outer clamp (5) has a third outer clamping limb (501) and a fourth outer clamping limb (502) connected at an obtuse angle. The third outer clamping limb (501) is used to fit against the outside of the second reinforcing limb (102) and is fixedly connected to the second inner clamping limb (302) to clamp the second main limb (202) and the second reinforcing limb (102) between the second inner clamping limb (302) and the third outer clamping limb (501). The second external clamp (402) and the fourth external clamp (502) are respectively used to attach to and hold the two sides of the external extension (103).

3. The non-destructive reinforcement structure according to claim 2, characterized in that: Bolt holes are provided on the first inner clamping limb (301), the second inner clamping limb (302), the first outer clamping limb (401), the second outer clamping limb (402), the third outer clamping limb (501), the fourth outer clamping limb (502), and the outer extension limb (103); The first inner clamp (301) and the first outer clamp (401) are fixedly connected by a bolt passing through the two; The second inner clamping limb (302) and the third outer clamping limb (501) are fixedly connected by a bolt passing through the two; The second external clamp (402), the external extension (103) and the fourth external clamp (502) are fixedly connected by bolts passing through the three, so as to achieve the second external clamp (402) and the fourth external clamp (502) to hold and fix the external extension (103) from both sides of the external extension (103).

4. The non-destructive reinforcement structure according to claim 2, characterized in that: The width of the inner clamp (3) is four-thirds to two times the width of the main material angle steel (2).

5. The non-destructive reinforcement structure according to claim 4, characterized in that: The inner clamp (3) also has a rib (303) connected to the first inner clamp (301) and the second inner clamp (302). The rib (303) is an isosceles right triangle, and the length of the right-angled side of the rib (303) is five-eighths to seven-eighths of the leg width of the main material angle steel (2).

6. The non-destructive reinforcement structure according to claim 2, characterized in that: The limb width of the first external clamp (401) is equal to the limb width of the third external clamp (501), the limb width of the second external clamp (402) is equal to the limb width of the fourth external clamp (502), and the limb width of the first external clamp (401) is greater than the limb width of the second external clamp (402).

7. The non-destructive reinforcement structure according to claim 6, characterized in that: The width of the second outer clamp (402) and the width of the fourth outer clamp (502) are both three-eighths to five-eighths of the width of the main material angle steel (2).

8. The non-destructive reinforcement structure according to claim 7, characterized in that: The top of the first external clamp (401) is flush with the top of the first internal clamp (301) connected to it, the top of the third external clamp (501) is flush with the top of the second internal clamp (302) connected to it, and the top of the second external clamp (402) is flush with the top of the external extension (103) connected to it and the top of the fourth external clamp (502).

9. The non-destructive reinforcement structure according to claim 1, characterized in that: The reinforcing limb is provided with a U-shaped hole (104), which is used to pass through the first original bolt (6). The first original bolt (6) is the original bolt that connects the main material angle steel (2) and the non-main material component (7) of the transmission tower. The reinforcing limb is connected to the main material angle steel (2) and the non-main material component (7) through the first original bolt (6).

10. The non-destructive reinforcement structure according to claim 9, characterized in that, The non-destructive reinforcement structure also includes: A plug (8) adapted to the inner cavity size of the U-shaped hole (104) is inserted into the U-shaped hole (104). The plug (8) has mating surfaces corresponding to the outer side of the main material angle steel (2) and the inner side of the bolt head of the first original bolt (6). The plug (8) is clamped and fixed between the main material angle steel (2) and the bolt head of the first original bolt (6) by the locking force of the first original bolt (6).

11. The non-destructive reinforcement structure according to claim 10, characterized in that: The main body of the U-shaped hole (104) has a groove (1041) on its side, and the main body of the plug (8) has a protrusion (801) that matches the groove (1041) on its side. When the plug (8) is installed in the U-shaped hole (104), the protrusion (801) is inserted into the groove (1041) to limit the plug (8).

12. The non-destructive reinforcement structure according to claim 1, characterized in that: It also includes a mounting plate (10), which is used to connect the lower end of the reinforcement (1) to the top of the base plate (9) of the transmission tower. The lower end of the reinforcement (1) is provided with a welding screw (105). The mounting plate (10) is provided with an upper hole and a lower hole. The upper hole is used to connect with the welding screw (105), and the lower hole is used to pass through the second original bolt (11). The second original bolt (11) is the original bolt that connects the main material angle steel (2) and the base plate (9). The mounting plate (10) is connected to the base plate (9) and the main material angle steel (2) through the second original bolt (11).

13. The non-destructive reinforcement structure according to claim 1 or 12, characterized in that: The upper end of the reinforcement member (1) is connected to the polygonal connecting plate (12) of the transmission tower. The upper end of the reinforcement member (1) is provided with an upper hole for passing through the upper hole. The third original bolt (13) is the original bolt that connects the main material angle steel (2) and the polygonal connecting plate (12). The reinforcement member (1) is connected to the main material angle steel (2) and the polygonal connecting plate (12) through the third original bolt (13).

14. A method for non-destructive reinforcement of angle steel in Y-shaped transmission towers, employing the non-destructive reinforcement structure as described in any one of claims 1 to 13, characterized in that, Includes the following steps: The inner side plates of the two reinforcing limbs of the reinforcement member (1) are respectively attached to the outer side plates of the two main limbs of the main material angle steel (2); The outer side plates of the two inner clamps of the inner clamp (3) are respectively attached to the inner side plates of the two main members of the main material angle steel (2); Two external clamps are respectively set on the outside of the two reinforced limbs, so that the inner side plate of each external clamp is in contact with the outer side plate of the corresponding reinforced limb and the corresponding side plate of the extension limb (103); Connect the two outer clamps to the corresponding inner clamps of the inner clamp (3), and lock the two outer clamps together with the outer extension (103) so that the inner clamp (3) and the two outer clamps together form a three-dimensional rigid clamping of the reinforcement (1) and the main material angle steel (2).

15. The non-destructive reinforcement method according to claim 14, characterized in that, The method of attaching the inner side plates of the two reinforcing limbs of the reinforcing member (1) to the outer side plates of the two main limbs of the main member angle steel (2) respectively also includes: At the connection node between the main material angle steel (2) and the non-main material component (7), the U-shaped hole (104) on the reinforcing limb is aligned with the first original bolt (6) connecting the main material angle steel (2) and the non-main material component (7). Insert the plug (8) into the U-shaped hole (104) and clamp the plug (8) between the head of the main material angle steel (2) and the head of the first original bolt (6) by the first original bolt (6).

16. The non-destructive reinforcement method according to claim 14, characterized in that, The process of attaching the inner side plates of the two reinforcing limbs of the reinforcing member (1) to the outer side plates of the two main limbs of the main member angle steel (2) respectively, further includes: Extend the lower end of the reinforcement member (1) to the top of the base plate (9) of the transmission tower; Align the upper hole of the mounting plate (10) with the welding screw (105) at the lower end of the reinforcement (1), and align the lower hole of the mounting plate (10) with the second original bolt (11) connecting the main material angle steel (2) and the foot plate (9). Tighten the nuts on the welding screw (105) and the second original bolt (11) to fix the reinforcement (1) to the foot plate (9) through the plate (10).

17. The non-destructive reinforcement method according to claim 14 or 16, characterized in that, The process of attaching the inner side plates of the two reinforcing limbs of the reinforcing member (1) to the outer side plates of the two main limbs of the main member angle steel (2) respectively, further includes: Extend the upper end of the reinforcement (1) to the connection between the main material angle steel (2) and the polygonal connecting plate (12); Align the upper hole of the reinforcement (1) with the third original bolt (13) connecting the main material angle steel (2) and the polygonal connecting plate (12). Tighten the nut on the third original bolt (13) to fix the reinforcement (1) to the main material angle steel (2) and the polygonal connecting plate (12).

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