A latticed angle steel power transmission tower main material rod reinforcing device and a reinforcing method thereof

Abstract

The application relates to a lattice type angle steel power transmission tower main material rod reinforcing device and a reinforcing method thereof, which is installed on an original angle steel, and the device comprises a plurality of hoop units distributed along the longitudinal direction of the original angle steel, and the hoop units are connected with each other through a screw rod; each hoop unit comprises a first annular hoop, a second annular hoop, a third annular hoop and a connecting piece, the first annular hoop, the second annular hoop and the third annular hoop are sequentially connected through a first bolt to form a circular hoop structure, the original angle steel and the connecting piece are located in the circular hoop structure, one end of the connecting piece is connected with the original angle steel through a first welding nail, and the other end is connected with the circular hoop structure through a second bolt; and one end of the original angle steel, which is away from the connecting piece, is connected with the circular hoop structure through a second welding nail. Compared with the prior art, the application has the advantages of convenient construction, safety and reliability, strong popularization, good economy, high reinforcing efficiency and the like, and is particularly suitable for reinforcing the main material angle steel of a span node.

Description

Technical Field

[0001] This invention relates to the field of transmission tower structural reinforcement, and in particular to a reinforcement device and method for the main members of a lattice-type angle steel transmission tower. Background Technology

[0002] Currently, for various types of transmission towers that have been in service for a long time, the strength and load-bearing capacity of the steel used are no longer sufficient to meet the demands of tower loading in recent years due to limitations imposed by the original design loads, calculation conditions, manufacturing conditions, and atmospheric corrosion. To address the various requirements for increased loads on overhead transmission lines, the reinforcement and upgrading of transmission towers has become an important task.

[0003] As the main load-bearing component of the entire tower, the angle steel transmission tower's main members have a significant impact on the tower's overall safety. When the tower is subjected to excessive stress, the main members are prone to minimum axial instability failure. Upon review and calculation, it was found that the angle steel main members may experience stress ratios exceeding limits under compression or tension. Therefore, appropriate reinforcement methods need to be designed to improve their tensile bearing capacity and compressive stability bearing capacity.

[0004] In the field of transmission tower reinforcement design, the main approach to addressing insufficient load-bearing capacity of the main structural members is to increase the cross-sectional dimensions. This involves using parallel connections of new and old angle steel to share the load, thereby increasing the moment of inertia and thus improving the load-bearing capacity of the main structural members. Based on the connection method of the new and old angle steel, there are two types: the first type uses welding or bolting to connect the new and old angle steel, such as... Figure 1 As shown. On the one hand, bolted connections require drilling holes in the original angle steel, which weakens its load-bearing capacity; on the other hand, welding can generate residual stress in localized areas of the original angle steel, easily causing safety hazards. Furthermore, high-altitude welding or drilling is difficult, and the construction quality is not easily guaranteed. The second method is a clamp connection, such as... Figure 2 As shown, the new and old angle steels are attached together by using clamps to increase the cross-sectional area of ​​the original component. The friction force allows the clamp and the original component to share the load, which improves the load-bearing capacity to a certain extent. However, since the clamp is not a directly load-bearing component, the working principle of the clamp and the original component is not clear, and a systematic key technology design method cannot be formed.

[0005] Meanwhile, the method of increasing the cross-sectional size by combining new and old angle steel sections also has the following problems: 1. It can only partially strengthen the structure. The new and old angle steels in the combined section are closely fitted, but there are obstacles such as node plates, stiffening ribs and bolts at the connection between the main material and the diagonal material or the connection between the main material and the auxiliary material. This causes the strengthening angle steel (new angle steel) to break at these locations. The break is likely to form a weak link in the main material member, which reduces the strengthening efficiency and structural reliability; 2. The specifications and dimensions of the strengthening angle steel (new angle steel) in the combined section of new and old angle steel need to be set according to the original angle steel section size. The versatility is poor, and small dimensional differences can easily lead to misinstallation during construction, which is inconvenient for construction; 3. The new and old angle steels are close together, and the combined section formed has a small effect on increasing the moment of inertia of the section, resulting in low strengthening efficiency. Summary of the Invention

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a lattice angle steel transmission tower main member reinforcement device and reinforcement method that is far from the original angle steel and can improve the tensile bearing capacity and compressive stability bearing capacity of the original angle steel.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A reinforcement device for the main members of a lattice-type angle steel transmission tower is installed on the original angle steel. The device includes multiple clamping units distributed longitudinally along the original angle steel, and the clamping units are interconnected by screw rods.

[0009] Each clamp unit includes a first annular clamp, a second annular clamp, a third annular clamp, and a connector. The first annular clamp, the second annular clamp, and the third annular clamp are connected end to end by a first bolt to form a circular clamp structure. The original angle steel and the connector are both located within the circular clamp structure. One end of the connector is connected to the original angle steel by a first welding stud, and the other end is connected to the circular clamp structure by a second bolt. The end of the original angle steel away from the connector is connected to the circular clamp structure by a second welding stud.

[0010] Furthermore, the connector includes a pre-angle steel mating part, a connecting plate, and a clamping part that are welded together in sequence. The pre-angle steel mating part is a 90° right-angle curved plate that matches the inner shape of the pre-angle steel. The clamping part is a fan-shaped plate with a 90° central angle that matches the inner shape of the circular clamping structure.

[0011] Furthermore, the mating surface between the original angle steel and the original angle steel is a flattened plane, the right-angle position of the original angle steel is shaved, and the original angle steel mating part has four welding stud holes symmetrically arranged, the diameter of the welding stud holes being 0.5mm larger than the diameter of the first welding stud.

[0012] Furthermore, the original angle steel mating part is connected to the original angle steel by a first welding stud.

[0013] Furthermore, the clamp fitting part is connected to the second annular clamp by a second bolt.

[0014] Furthermore, the original angle steel is connected to the first annular clamp and the third annular clamp respectively by the second welding stud.

[0015] Furthermore, one end of the second welding stud is welded to the original angle steel, and the other end is threaded; the first annular clamp and the third annular clamp are respectively provided with threaded holes 0.5mm larger than the diameter of the second welding stud, and the threaded end of the second welding stud extends out of the threaded holes of the first annular clamp and the third annular clamp and is fixed by a nut.

[0016] Furthermore, the circular clamp structure has three screw fixing holes evenly distributed. The screw fixing holes of each clamp unit are located in the middle of each annular clamp, and all screw fixing holes in the same longitudinal direction are connected by corresponding screws.

[0017] The present invention also provides a reinforcement method for the main members of a lattice-type angle steel transmission tower as described above, comprising the following steps:

[0018] Assemble each clamp unit sequentially from bottom to top, starting from the bottom of the original angle steel;

[0019] When assembling the bottommost clamp unit, the connector is fixed to the original angle steel; the second annular clamp is fixedly connected to one end of the connector, and the second annular clamp is connected end-to-end with the first and third annular clamps to form a circular clamp structure; then one end of the second welding stud is welded to the original angle steel, and the other end passes through the first annular clamp and is fixed with a nut; finally, screw rods are installed around the circular clamp structure, and the screw rods are fixed at the connection between the screw rods and the circular clamp structure with upper and lower nuts;

[0020] When assembling other clamp units, the first ring clamp, the second ring clamp, and the third ring clamp are connected to form a circular clamp structure. One end of the circular clamp structure is inserted into the screw and fixedly connected to the second ring clamp. The other end of the connector is fixed to the original angle steel. Finally, one end of the second welding stud is welded to the original angle steel, and the other end passes through the first ring clamp and the third ring clamp and is fixed by a nut.

[0021] Furthermore, if the original angle steel is the main member in the angle steel transmission tower, the spacing between two adjacent clamp units is within 18-22 times the minimum axial gyration radius of the original angle steel, and can be flexibly arranged according to the size and position of the main member-diagonal member or main member-auxiliary member node plate.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] (1) The clamp of the present invention is flexible and easy to adjust. By adjusting the first weld stud, the ring clamp can be connected to angle steel of different specifications, and the clamp and the original angle steel form a reliable connection. The clamp and the screw are connected by upper and lower nuts, which is reliable and the length of each section of the screw can be adjusted arbitrarily according to actual needs. In this reinforcement method, the screw and the angle steel are connected in parallel, which increases the cross-sectional area and moment of inertia of the stressed member. The two are under the same force, which can improve the tensile and compressive stability bearing capacity of the original angle steel.

[0024] (2) Convenient construction: The reinforcement scheme is easy to construct. The bottom layer of circular clamps can be fixed to the original angle steel by welding studs, and the other layers of circular clamps can be positioned by the bottom layer of circular clamps and screw rods, which is convenient for construction. Each circular clamp can be moved up and down by screw rods, which allows for flexible arrangement.

[0025] (3) Safety and reliability: The reinforcement scheme uses a welded stud connection to connect the ring clamp to the original angle steel. While ensuring reliable connection, the welding surface is minimized as much as possible to reduce the impact of welding on the material properties of the original angle steel. The screw is far from the original angle steel, which can significantly increase the moment of inertia of the section.

[0026] (4) Highly applicable: After verification of angle steel members with different specifications and slenderness ratios, good reinforcement effect can be achieved, and it is not limited to the influence of angle steel specifications.

[0027] (5) Good economic efficiency: This reinforcement scheme can be carried out with live power, avoiding direct and indirect economic losses caused by power outages, and has good economic and social benefits.

[0028] (6) High reinforcement efficiency: The main load-bearing component screw of this reinforcement method is at a certain distance from the original angle steel. The reinforcement device can avoid collision with the main material-diagonal material node or the main material-auxiliary material node. The length of the reinforcement section can be adjusted according to the design requirements. The reinforcement section has good integrity and high reinforcement efficiency. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a traditional combined angle steel reinforcement device provided in the background art of the present invention;

[0030] Figure 2 This is a schematic diagram of a reinforcement device for a reinforced material without drilling, as provided in the background art of the present invention;

[0031] Figure 3 This is a side view of a lattice-type angle steel transmission tower main member reinforcement device provided in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the clamp unit structure of a lattice-type angle steel transmission tower main member reinforcement device provided in an embodiment of the present invention;

[0033] Figure 5 This is a front view of a lattice-type angle steel transmission tower main member reinforcement device provided in an embodiment of the present invention;

[0034] Figure 6 This is a cross-sectional view of the angle steel reinforcement provided in an embodiment of the present invention;

[0035] Figure 7 This is a front view of a main member reinforcement device for a lattice-type angle steel transmission tower spanning the main member-diagonal member node, provided in an example of the present invention.

[0036] Figure 8 This is a three-dimensional schematic diagram of a main member reinforcement device for a lattice-type angle steel transmission tower spanning the main member-diagonal member node, provided in an example of the present invention.

[0037] In the diagram, 1. First ring clamp, 2. Second ring clamp, 3. Third ring clamp, 4. First C-grade bolt, 5. Second C-grade bolt, 6. First welding stud, 7. Second welding stud, 8. Lead screw, 9. Connector, 10. Original angle steel. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of this invention, it should be noted that the terms "inner" and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only used to facilitate the description of this invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] Example 1

[0044] like Figure 3 and Figure 5 As shown, this embodiment provides a reinforcement device for the main members of a lattice-type angle steel transmission tower, which is installed on the original angle steel 10. The device includes multiple clamping units distributed longitudinally along the original angle steel 10, and each clamping unit is interconnected by a screw 8.

[0045] like Figure 4 As shown, each clamp unit includes a first annular clamp 1, a second annular clamp 2, a third annular clamp 3, and a connector 9. The first annular clamp 1, the second annular clamp 2, and the third annular clamp 3 are connected end to end by a first C-grade bolt 4 to form a circular clamp structure. The original angle steel 10 and the connector 9 are both located within the circular clamp structure. One end of the connector 9 is connected to the original angle steel 10 by a first welding stud 6, and the other end is connected to the circular clamp structure by a second C-grade bolt 5. The end of the original angle steel 10 away from the connector 9 is connected to the circular clamp structure by a second welding stud 7.

[0046] Specifically, the connector 9 includes a pre-angle steel mating part, a connecting plate, and a clamping mating part that are welded together in sequence. The pre-angle steel mating part is a 90° right-angle curved plate that matches the inner shape of the pre-angle steel 10. The clamping mating part is a fan-shaped plate with a 90° central angle that matches the inner shape of the circular clamping structure. The rod-shaped connecting part is connected to the middle of the pre-angle steel mating part and the clamping mating part respectively.

[0047] Preferably, the mating surface between the original angle steel mating part and the original angle steel 10 is a flattened plane, the right angle position of the original angle steel mating part is shaved, and four welding stud holes are symmetrically arranged in the original angle steel mating part. The diameter of the welding stud holes is 0.5mm larger than the diameter of the first welding stud 6. In this embodiment, the L-shaped limb end of the original angle steel mating part is flattened with a 2mm arc to achieve the purpose of fastening with the original angle steel 10.

[0048] Optionally, the original angle steel mating part is connected to the original angle steel 10 by the first welding stud 6.

[0049] In this embodiment, each right-angled side of the original angle steel mating part is connected to two first welding studs 6.

[0050] Optionally, the original angle steel 10 is connected to the first annular clamp 1 and the third annular clamp 3 respectively by the second welding stud 7. One end of the second welding stud 7 is welded to the original angle steel 10, and the other end is threaded. The first annular clamp 1 and the third annular clamp 3 are respectively provided with threaded holes 0.5mm larger than the diameter of the second welding stud 7. The threaded end of the second welding stud 7 extends out of the threaded holes of the first annular clamp 1 and the third annular clamp 3 and is fixed by a nut.

[0051] In this embodiment, each right-angled side of the original angle steel 10 is connected to a second welding stud 7.

[0052] The first welding stud 6 and the second welding stud 7 are welding studs of the same diameter and are equipped with threads and corresponding nuts on their surfaces.

[0053] The clamping part is connected to the second annular clamp 2 by bolts. Specifically, the two sides of the clamping part are connected to the second annular clamp 2 by a second C-grade bolt.

[0054] The first annular clamp 1 connects to the second annular clamp 2 to form a circular clamp structure. Specifically, the connection between the first annular clamp 1 and the second annular clamp 2 is made by C-grade bolts.

[0055] The circular clamp structure has multiple screw fixing holes evenly distributed. The screw fixing holes of each clamp unit correspond to each other and are connected to the screw fixing holes in the same longitudinal direction through corresponding screws 8. In this embodiment, the first annular clamp 1 corresponds to two-thirds of the circular clamp structure, and the second annular clamp 2 corresponds to one-third of the circular clamp structure. The first annular clamp 1 has two screw fixing holes evenly distributed, and the second annular clamp 2 has one screw fixing hole. Each screw fixing hole is connected to the other screw fixing hole through three screws 8.

[0056] Example 2

[0057] This embodiment provides a reinforcement method for the main members of the lattice angle steel transmission tower, including the following steps:

[0058] Assemble each clamp unit sequentially from bottom to top, starting from the bottom of the original angle steel 10;

[0059] When assembling the bottommost clamp unit, the connector 9 is fixed to the original angle steel 10; the second annular clamp 2 is fixedly connected to one end of the connector 9, and the second annular clamp 2 is connected end-to-end to the first annular clamp 1 to form a circular clamp structure; then one end of the first welding stud 6 is welded to the original angle steel 10, and the other end passes through the first annular clamp 1 and is fixed with a nut; finally, the lead screw 8 is installed around the circular clamp structure, and the lead screw 8 is fixed at the connection between the lead screw 8 and the circular clamp structure with upper and lower nuts;

[0060] When assembling other clamp units, the first annular clamp 1 and the second annular clamp 2 are connected to form a circular clamp structure. The circular clamp structure is inserted into the lead screw 8 and fixed. One end of the connector 9 is fixedly connected to the second annular clamp 2, and the other end of the connector 9 is fixed to the original angle steel 10. Finally, one end of the first welding stud 6 is welded to the original angle steel 10, and the other end passes through the first annular clamp 1 and is fixed by a nut.

[0061] If the original angle steel 10 is the main member in the angle steel transmission tower, then the spacing between two adjacent clamp units is within 18-22 times the minimum axial gyration radius of the original angle steel 10.

[0062] If the original angle steel 10 is a diagonal member in the angle steel transmission tower, then the spacing between two adjacent clamp units is within 23-27 times the minimum axial gyration radius of the original angle steel 10.

[0063] The following is a specific reinforcement process for the main members of the aforementioned lattice angle steel transmission tower.

[0064] The circular clamps are assembled sequentially from bottom to top. First, assemble the bottommost circular clamp. Connector 9 is connected to the original angle steel 10 via a second weld stud. The second weld stud has the same diameter, and the non-welded end needs to be threaded. After connector 9 and the original angle steel 10 are in place, weld the weld stud and tighten the nut. The sharp corner of the L-shaped leg of connector 9 should be rounded by 2mm to achieve the purpose of fastening with the original angle steel 10. The second annular clamp 2 is connected to connector 9 via a second C-grade bolt. After being in place, the second annular clamp 2 and the first annular clamp 1 are connected via a first C-grade bolt to form a circular clamp, ensuring that the circular clamp is in a uniform horizontal plane. Then, weld the first weld stud 6 to the original angle steel 10 and tighten the nut to make the circular clamp firmly connected to the original angle steel. The lead screw 8 is installed in place and connected to the circular clamp via upper and lower nuts; the bottommost circular clamp assembly is complete.

[0065] Next, assemble the next layer of circular clamps. First, connect the first annular clamp 1 and the second annular clamp 2 to form a circular clamp using first-grade C bolts. Insert the annular clamps into the lead screws sequentially and position them vertically. Connect the connector 9 to the second annular clamp 2 using second-grade C bolts. Weld the second weld stud 7 according to the L-shaped end hole positions of the connector 9 and tighten the nut. Weld the first weld stud to the original angle steel 10 and tighten the bolt. Repeat the above sequence to install the next layer of circular clamps.

[0066] In this reinforcement method, the spacing of the clamps in the reinforcement position of the main member of the angle steel transmission tower is (18~22) * the original minimum axial gyration radius of the angle steel.

[0067] Figure 6 The diagram shows the cross-section of the angle steel reinforcement, with multiple threaded rods surrounding the original angle steel 10.

[0068] Figure 7 This is a main member reinforcement device for lattice-type angle steel transmission towers crossing the main member-diagonal member node.

[0069] Figure 8 A three-dimensional schematic diagram of the main member reinforcement device for a lattice-type angle steel transmission tower crossing the main member-diagonal member node.

[0070] The angle steel member reinforcement design method proposed in this embodiment is based on the clamp-screw reinforcement scheme. The clamp is flexible and easy to adjust. By adjusting the first weld stud, the ring clamp can be connected to angle steels of different specifications, forming a reliable connection between the clamp and the original angle steel. The clamp and the screw are connected by upper and lower nuts, ensuring a reliable connection and allowing for arbitrary adjustment of the length of each section of the screw according to actual needs. This reinforcement method forms a parallel connection between the screw and the angle steel, increasing the cross-sectional area and moment of inertia of the stressed member. Both share the load, improving the tensile and compressive stability bearing capacity of the original angle steel.

[0071] The main load-bearing component, screw 8, of this reinforcement method is at a certain distance from the original angle steel 10. The reinforcement device can avoid collisions with the main material-diagonal material node and the main material-auxiliary material node. The length of the reinforcement section can be adjusted according to design requirements. The reinforcement section has good integrity and high reinforcement efficiency.

[0072] The reinforcement scheme uses a welded stud connection to connect the ring clamp to the original angle steel 10. While ensuring reliable connection, the welding surface is minimized to reduce the impact of welding on the material properties of the original angle steel 10.

[0073] This reinforcement scheme is easy to construct. The bottom layer of circular clamps can be fixed to the original angle steel by welding studs, and the remaining layers of circular clamps can be positioned by the bottom layer of circular clamps and screw rods, which is convenient for construction. Each circular clamp can be moved up and down by screw rods, which allows for flexible arrangement.

[0074] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A reinforcement device for the main members of a lattice-type angle steel transmission tower, installed on the original angle steel (10), characterized in that, The device includes multiple clamping units distributed longitudinally along the original angle steel (10), and each clamping unit is interconnected by a screw (8); Each clamp unit includes a first annular clamp (1), a second annular clamp (2), a third annular clamp (3), and a connector (9). The first annular clamp (1), the second annular clamp (2), and the third annular clamp (3) are connected end to end by a first bolt (4) to form a circular clamp structure. The original angle steel (10) and the connector (9) are both located inside the circular clamp structure. One end of the connector (9) is connected to the original angle steel (10) by a first welding stud (6), and the other end is connected to the circular clamp structure by a second bolt (5). The end of the original angle steel (10) away from the connector (9) is connected to the circular clamp structure by a second welding stud (7). The connector (9) includes a cohesive part of the original angle steel, a connecting plate and a clamping part that are welded together in sequence. The cohesive part of the original angle steel is a 90° right-angle curved plate that matches the inner shape of the original angle steel (10). The clamping part is a fan-shaped plate with a 90° central angle that matches the inner shape of the circular clamping structure.

2. The reinforcement device for the main members of a lattice-type angle steel transmission tower according to claim 1, characterized in that, The mating surface between the original angle steel mating part and the original angle steel (10) is a flattened plane. The right-angle position of the original angle steel mating part is shaved. The original angle steel mating part has four welding stud holes symmetrically arranged. The diameter of the welding stud holes is 0.5mm larger than the diameter of the first welding stud (6).

3. The reinforcement device for the main members of a lattice-type angle steel transmission tower according to claim 1, characterized in that, The original angle steel mating part is connected to the original angle steel (10) by the first welding stud (6).

4. The reinforcement device for the main members of a lattice-type angle steel transmission tower according to claim 1, characterized in that, The clamping part is connected to the second annular clamp (2) by the second bolt (5).

5. The reinforcement device for the main members of a lattice-type angle steel transmission tower according to claim 1, characterized in that, The original angle steel (10) is connected to the first annular clamp (1) and the third annular clamp (3) respectively by the second welding stud (7).

6. The reinforcement device for the main members of a lattice-type angle steel transmission tower according to claim 5, characterized in that, One end of the second welding stud (7) is welded to the original angle steel (10), and the other end is threaded; the first annular clamp (1) and the third annular clamp (3) are respectively provided with threaded holes 0.5 mm larger than the diameter of the second welding stud (7), and the threaded end of the second welding stud (7) extends out of the threaded holes of the first annular clamp (1) and the third annular clamp (3) and is fixed by a nut.

7. The reinforcement device for the main members of a lattice-type angle steel transmission tower according to claim 1, characterized in that, The circular clamp structure has three screw fixing holes evenly distributed. The screw fixing holes of each clamp unit are located in the middle of each annular clamp and are connected to all screw fixing holes in the same longitudinal direction by the corresponding screw (8).

8. A reinforcement method for a lattice-type angle steel transmission tower main member reinforcement device as described in any one of claims 1-7, characterized in that, Includes the following steps: Assemble each clamp unit sequentially from bottom to top from the bottom of the original angle steel (10); When assembling the bottommost clamp unit, the connector (9) is fixed to the original angle steel (10); the second ring clamp (2) is fixedly connected to one end of the connector (9), and the second ring clamp (2) is connected end-to-end with the first ring clamp (1) and the third ring clamp (3) to form a circular clamp structure; then one end of the second welding stud (7) is welded to the original angle steel (10), and the other end passes through the first ring clamp (1) and is fixed by a nut; finally, screw rods (8) are installed around the circular clamp structure, and the screw rods (8) are fixed at the connection between the circular clamp structure and the circular clamp structure by upper and lower nuts; When assembling other clamp units, the first ring clamp (1), the second ring clamp (2) and the third ring clamp (3) are connected to form a circular clamp structure. The circular clamp structure is inserted into the screw (8) and fixed by the upper and lower nuts. One end of the connector (9) is fixedly connected to the second ring clamp (2), and the other end of the connector (9) is fixed to the original angle steel (10). Finally, one end of the second welding stud (7) is welded to the original angle steel (10), and the other end passes through the first ring clamp (1) and the third ring clamp (3) and is fixed by the nut.

9. The method according to claim 8, characterized in that, If the original angle steel (10) is the main member in the angle steel transmission tower, the spacing between two adjacent clamp units is within 18-22 times the minimum axial rotation radius of the original angle steel (10), and can be flexibly arranged according to the size and position of the main member-diagonal member or main member-auxiliary member node plate.

Images