Lossless reinforcing device and reinforcing method for single-angle steel structure of power transmission tower

Abstract

The invention discloses a lossless reinforcing device for an angle steel structure of a power transmission tower, which is connected to a single angle steel structure of the power transmission tower and comprises a buckle and reinforcing angle steel, the reinforcing angle steel and the single angle steel structure are attached to each other in a limb back mode to form symmetrical attaching pieces with T-shaped sections. The buckles are connected with the two limb tips on one side of the symmetry axis of the attaching piece and the two limb tips on the two sides of the symmetry axis of the attaching piece in a clamped mode respectively, and fixing between the reinforcing angle steel and the single-angle steel structure is achieved. The method has the beneficial effects that the fixing design that the fitting pieces with symmetrical T-shaped sections are formed by the reinforcing angle steel and the single angle steel in a limb back attaching mode and the buckles is adopted; when the single angle steel is pressed or bent, the buckles ensure that the reinforcing angle steel and the original single angle steel are firmly attached and cooperatively work, the inertia moment of the T-shaped section is increased, the bearing capacity of the T-shaped section is enhanced, and the original angle steel is prevented from being untimely unstable and damaged; the reinforcing method adopting the lossless reinforcing device is suitable for reinforcing single angle steel of structures such as a power transmission tower, drilling and welding on original angle steel are not needed, in-situ lossless reinforcing is achieved, and field installation is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of transmission tower angle steel reinforcement, and in particular to a non-destructive reinforcement device and a reinforcement method for a single angle steel structure of a transmission tower. Background Art

[0002] With the rapid development of the national economy and infrastructure, the power industry is booming. As one of the basic industries of the national economy, the power industry is a key factor in ensuring national life and social stability, and is closely related to the development of national economy and people's livelihood. The transmission tower is the direct support structure of the power grid line, and its safety and reliability directly affect the normal operation of the entire transmission line.

[0003] With the development of power networks, the voltage level of transmission lines is getting higher and higher, and the transmission capacity is getting larger and larger, resulting in the internal force of transmission tower components exceeding the design bearing capacity. The increase in internal force of old tower components in service is mainly due to changes in usage conditions and updates to design standards in the power industry and related professions. This has resulted in some transmission towers in service being unable to meet the new design conditions. Therefore, some transmission towers need to be reinforced.

[0004] There are many limitations on the research of transmission tower reinforcement. The transmission tower needs to be kept in an energized state, and the reinforcement process cannot affect the normal operation of the transmission tower. It is necessary to avoid drilling or welding on the original structure of the transmission tower to avoid damage to the original structure of the transmission tower and affect its bearing capacity. In addition, high-altitude operations are difficult and risky, and reinforcement tools need to be simple and convenient, easy to install, and ensure the safety and efficiency of reinforcement operations. Therefore, there are still no mature and generally recognized reinforcement technologies and means. Summary of the invention

[0005] The present invention aims to overcome the deficiencies of the prior art and provides a non-destructive reinforcement device and reinforcement method for a single angle steel structure of a transmission tower, which is specifically implemented by the following technical solutions:

[0006] The lossless reinforcement device for the angle steel structure of the transmission tower is connected to the single angle steel structure of the transmission tower, and includes: a clip and a reinforcing angle steel; the reinforcing angle steel and the single angle steel structure are attached to each other to form a fitting with a symmetrical T-shaped cross-section; the clip respectively clips the two limb tips on one side of the symmetry axis and the two limb tips on both sides of the symmetry axis to achieve fixation between the reinforcing angle steel and the single angle steel structure.

[0007] A further design of the lossless reinforcement device for the transmission tower angle steel structure is that the buckle includes: a waist buckle for clamping two limbs on one side of the symmetry axis of the fitting and a bottom buckle for clamping two limbs on the symmetry axis of the fitting, and the waist buckle and the bottom buckle both include: two fasteners containing a detour portion and an adjustment connector for connecting the two fasteners, and each fastener is abutted against one limb of the angle steel fitting through the detour portion to form a fixed fulcrum.

[0008] A further design of the non-destructive reinforcement device for the transmission tower angle steel structure is that the fastener of the waist buckle is a round steel piece, one end of the round steel piece is bent at α° to form the circuitous portion, and the other end is a connecting portion with a thread, and the spiral directions of the threads of the two fastener connecting portions are opposite, α∈[44, 46].

[0009] A further design of the non-destructive reinforcement device for the transmission tower angle steel structure is that the fastener of the bottom buckle is a round steel piece, one end of the round steel piece is bent β° to form the circuitous portion, and the other end is a connecting portion with a thread, and the spiral directions of the threads of the two fastener connecting portions are opposite, β∈[179, 181].

[0010] A further design of the non-destructive reinforcement device for the angle steel structure of the transmission tower is that the number of waist buckles and bottom buckles is the same, adjacent waist buckles and bottom buckles form a group of fasteners, the spacing between the waist buckles and the bottom buckles of each group of fasteners is set to 8-12mm, the device includes at least three groups of fasteners, and the spacing between adjacent fasteners is set to 4 to 5 times the width of the single angle steel structure limb.

[0011] A further design of the non-destructive reinforcement device for the angle steel structure of the power transmission tower is that the adjusting connector is a connecting sleeve with an internal thread, and the internal thread is adapted to the thread of the fastener.

[0012] A further design of the non-destructive reinforcement device for the angle steel structure of the transmission tower is that the connecting sleeve is an elongated hexagonal nut-shaped structure with a length of 4 to 5 times the diameter of the round steel piece.

[0013] A further design of the non-destructive reinforcement device for the angle steel structure of the transmission tower is that the diameter of the round steel piece is 1.5 to 2 times the wall thickness of a single angle steel component of the transmission tower.

[0014] A further design of the non-destructive reinforcement device for the transmission tower angle steel structure is that the length of the reinforcement angle steel relative to the reinforcement area of ​​the single angle steel structure is 1 / 4 to the entire length of the single angle steel structure.

[0015] The present invention also provides a method for reinforcing the single-angle steel structure of a transmission tower using the non-destructive reinforcement device for the single-angle steel structure of the transmission tower, wherein the reinforcing angle steel and the single-angle steel structure are attached to each other to form a symmetrical T-section fitting; then at least three groups of buckles are used to clamp and fix the fitting, each group of buckles includes a waist buckle for clamping the two limb tips on one side of the symmetry axis of the fitting and a bottom buckle for clamping the two limb tips on the symmetry axis of the fitting, adjacent groups of buckles are arranged at intervals of 4 to 5 times the limb width of the single-angle steel structure, and the waist buckle and the bottom buckle of each group of buckles are arranged at an interval of 8-12 mm, and the buckles are all tightly clamped on the fitting to complete the reinforcement operation.

[0016] The advantages of the present invention are as follows:

[0017] The non-destructive reinforcement device for the angle steel structure of the present invention adopts a fixing design of a fitting piece and a buckle to form a symmetrical T-section by pasting the reinforcing angle steel and the single angle steel structure in parallel; when the single angle steel is subjected to compression or bending, out-of-plane deformation in the direction of the vertical load is easily generated, and the buckle ensures that the reinforcing angle steel and the original single angle steel are firmly fitted and work in coordination, thereby increasing the inertia moment of the T-section, reducing the slenderness ratio of the angle steel, avoiding premature instability and damage of the original angle steel, and enhancing its bearing capacity.

[0018] The method of the present invention adopts the above-mentioned lossless reinforcement device, which is suitable for reinforcing single angle steels of structures such as transmission towers. There is no need to drill holes and weld on the original angle steels, so in-situ lossless reinforcement is achieved. The device has a simple structure and is easy to install on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of the non-destructive reinforcement device for the single-angle steel structure of a transmission tower.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the non-destructive reinforcement device for the single-angle steel structure of the transmission tower.

[0021] Figure 3 This is a schematic diagram of the reinforcement of the non-destructive reinforcement device for the single-angle steel structure of the transmission tower.

[0022] In the figure, 1-single angle steel structure; 2-reinforcement angle steel; 3-long positive tooth round steel; 4-long negative tooth round steel; 5-short positive tooth round steel; 6-short negative tooth round steel; 7-adjustment connector; 10-waist buckle; 20-bottom buckle. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is described in detail below.

[0024] Embodiment 1

[0025] like Figure 1The non-destructive reinforcement device for the angle steel structure of the transmission tower of this embodiment is connected to the single angle steel structure of the transmission tower, including: a buckle, a reinforcing angle steel 2; the reinforcing angle steel 2 and the single angle steel structure 1 are attached to each other back to back to form a fitting with a symmetrical T-shaped cross-section; the buckle respectively clamps the two limb tips on one side of the symmetry axis of the fitting and the two limb tips on both sides of the symmetry axis to achieve fixation between the reinforcing angle steel and the single angle steel structure.

[0026] The buckle of this embodiment includes: a waist buckle 10 for clamping two limbs on one side of the symmetry axis of the fitting and a bottom buckle 20 for clamping two limbs on the symmetry axis of the fitting, and the waist buckle 10 and the bottom buckle 20 both include: two buckle parts with a detour and an adjustment connector 7 for connecting the two buckle parts. Each buckle is against one limb of the fitting with a T-shaped cross-section through the detour to form a fixed fulcrum.

[0027] The fasteners of the waist buckle 10 are round steel pieces, specifically short positive round steel 5 and short negative round steel 6, see Figure 1 One end of the round steel piece is bent at α° to form a "7"-shaped detour, and the other end is a connecting part with threads. The spiral directions of the threads of the two fastener connecting parts are opposite. In this embodiment, α is set to 45. The waist buckle 10 is installed on the inner side of the original single angle steel in the T-section structure of the fitting. The short positive round steel and the short reverse round steel are buckled with the limb tips of the web and flange of the T-section angle steel, and are connected by adjusting the connecting piece to form a stable and reliable triangular structure.

[0028] The fastening piece of the bottom buckle is a round steel piece. One end of the round steel piece is bent β° to form a U-shaped detour, and the other end is a connecting part with a thread. The spiral directions of the threads of the two fastening parts are opposite. In this embodiment, β is set to 180. The bottom buckle 20 is installed on the outside of the flange of the T-section angle steel of the fitting part. The long positive round steel and the long negative round steel are interlocked with the flange tips at both ends of the T-section angle steel, and are fixedly connected by adjusting the connecting piece. When the single angle steel is compressed or bent, it is easy to produce out-of-plane deformation in the vertical load direction. The buckle can ensure that the reinforced angle steel and the original single angle steel are firmly fitted and work together, improve the inertia moment of the T-section angle steel, reduce the slenderness ratio of the angle steel, avoid the original angle steel from premature instability and damage, enhance its compression and bending bearing capacity, avoid welding and drilling on the original material, and realize in-situ non-destructive reinforcement.

[0029] In this embodiment, the number of waist buckles and bottom buckles is the same, and adjacent waist buckles and bottom buckles form a group of fasteners. The spacing between the waist buckles and the bottom buckles of each group of fasteners is set to 10 mm.

[0030] The adjusting connecting piece is a connecting sleeve with internal threads at both ends, and the internal threads are matched with the threads of the fastening piece.

[0031] The connecting sleeve of this embodiment is an elongated hexagonal nut-shaped structure, and its length is 4.5 times and 1.75 times that of the round steel.

[0032] The length of the reinforced angle steel in this embodiment is from 1 / 4 to the entire length of the single angle steel structure relative to the reinforced area of ​​the single angle steel structure.

[0033] Embodiment 2

[0034] This embodiment also provides a method for reinforcing a single angle steel structure of a transmission tower using the non-destructive reinforcement device for the single angle steel structure of the transmission tower, wherein the reinforcing angle steel and the single angle steel structure are back-jointed to form a symmetrical T-section fitting; and three sets of buckles are used to fix the fitting, see Figure 3 Each group of buckles includes a waist buckle 10 for clamping the two limb tips on one side of the symmetry axis of the fitting and a bottom buckle 20 for clamping the two limb tips of the symmetry axis of the fitting. Adjacent groups of buckles are arranged with a spacing of 4.5 times the limb width of the single-angle steel structure. The waist buckle and the bottom buckle of each group of buckles are arranged with a spacing of 10 mm. When the buckles are tightly clamped on the fitting, the reinforcement operation is completed.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A non-destructive reinforcement device for an angle steel structure of a power transmission tower, connected to a single angle steel structure of a power transmission tower, characterized in that: include: Buckle, reinforced angle steel; the reinforced angle steel and the single angle steel structure are attached to each other to form a symmetrical T-section fitting; The buckles respectively clamp the two limb tips on one side of the symmetry axis of the fitting and the two limb tips on both sides of the symmetry axis to achieve fixation between the reinforced angle steel and the single angle steel structure.

2. The non-destructive reinforcement device for the single angle steel structure of a transmission tower according to claim 1 is characterized in that The buckle includes: a waist buckle for clamping two limbs on one side of the symmetry axis of the fitting and a bottom buckle for clamping two limbs on the symmetry axis of the fitting. The waist buckle and the bottom buckle both include: two fasteners with a detour portion and an adjustment connector for connecting the two fasteners. Each fastener is abutted against one limb of the angle steel fitting through the detour portion to form a fixed fulcrum.

3. The non-destructive reinforcement device for the single angle steel structure of a transmission tower according to claim 2 is characterized in that The fastener of the waist buckle is a round steel piece, one end of which is bent at α° to form the circuitous portion, and the other end is a connecting portion with a thread. The spiral directions of the threads of the two fastener connecting portions are opposite, α∈[44, 46].

4. The non-destructive reinforcement device for the single angle steel structure of a power transmission tower according to claim 2 is characterized in that The fastener of the bottom buckle is a round steel piece, one end of which is bent by β° to form the circuitous portion, and the other end is a connecting portion with a thread. The spiral directions of the threads of the two fastener connecting portions are opposite, β∈[179, 181].

5. The non-destructive reinforcement device for the single angle steel structure of a power transmission tower according to claim 2 is characterized in that The number of waist buckles is consistent with that of bottom buckles, and adjacent waist buckles and bottom buckles form a group of fasteners. The spacing between waist buckles and bottom buckles in each group of fasteners is set to 8-12mm. The device includes at least three groups of fasteners, and the spacing between adjacent fasteners is set to 4 to 5 times the width of the single angle steel structure limb.

6. The non-destructive reinforcement device for the single angle steel structure of a power transmission tower according to claim 3 or 4, characterized in that The adjusting connecting piece is a connecting sleeve with an internal thread, and the internal thread is matched with the thread of the fastening piece.

7. The non-destructive reinforcement device for the single angle steel structure of a transmission tower according to claim 4 is characterized in that The connecting sleeve is an extended hexagonal nut-like structure, and its length is 4 to 5 times the diameter of the round steel part.

8. The non-destructive reinforcement device for the single angle steel structure of a transmission tower according to claim 3 is characterized in that The diameter of the round steel piece is 1.5 to 2 times the wall thickness of a single angle steel component of the transmission tower.

9. The non-destructive reinforcement device for the single angle steel structure of a power transmission tower according to claim 2, characterized in that The length of the reinforced angle steel relative to the reinforced area of ​​the single angle steel structure is 1 / 4 to the full length of the single angle steel structure.

10. A method for reinforcing a single angle steel structure of a power transmission tower using the non-destructive reinforcement device for the single angle steel structure of a power transmission tower as claimed in any one of claims 1 to 9, characterized in that The reinforcing angle steel and the single angle steel structure are attached to each other to form a symmetrical T-section fitting; then at least three groups of buckles are used to fix the fitting, each group of buckles includes a waist buckle for clamping the two limb tips on one side of the symmetry axis of the fitting and a bottom buckle for clamping the two limb tips on the symmetry axis of the fitting, adjacent groups of buckles are arranged at intervals of 4 to 5 times the limb width of the single angle steel structure, and the waist buckle and the bottom buckle of each group of buckles are arranged at an interval of 8-12mm. When the buckles are all tightly clamped on the fitting, the reinforcement operation is completed.

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