Reinforcing device and reinforcing method applied to single-angle steel structure of power transmission tower

Abstract

The invention discloses a reinforcing device and reinforcing method applied to a single-angle steel structure of a power transmission tower, and the reinforcing device is connected to the single-angle steel structure of the power transmission tower and comprises a buckle and at least one reinforcing angle steel; the reinforcing angle steel is externally wrapped or internally attached to the single angle steel structure to form an angle steel attaching piece of a multi-layer structure, and the buckles are connected with the two limb tips of the angle steel attaching piece in a clamped mode to achieve detachable connection with the attaching piece. The reinforcing device has the beneficial effects that the reinforcing angle steel is locally or wholly attached to or externally wrapped on the original single angle steel or can be simultaneously attached to or externally wrapped on the original single angle steel, so that an L-shaped overlapped section is formed; the buckles can ensure that the outer wrapping angle steel and the inner attaching angle steel are firmly attached to the original angle steel and work cooperatively, and the compression bearing capacity and the bending bearing capacity of the original single angle steel are improved; according to the reinforcement method, in-situ lossless reinforcement can be realized without welding and drilling on the original angle steel.

Description

Technical Field

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

[0002] Transmission towers are the direct supporting structures of power grid lines, and their safety and reliability directly affect the normal operation of the entire transmission line.

[0003] In recent years, regional transmission tower collapse accidents have occurred frequently. One of the reasons for the collapse of transmission towers is that the internal force of the components exceeds their design bearing capacity. The main reason for the increase in the internal force of the components of old towers in service is the change in usage conditions and the update of design standards in the power industry and related professions, which has resulted in the bearing capacity of some existing transmission towers being unable to meet the requirements of new design conditions. Therefore, some transmission towers need to be reinforced.

[0004] The reinforcement of transmission towers is subject to many restrictions. Transmission towers usually need to remain energized, and the normal operation of the transmission towers cannot be affected during the reinforcement process. Drilling or welding on the original structure of the transmission towers must be avoided to avoid damage to the original structure of the transmission towers and affect their stress performance. 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 of reinforcement operations. Therefore, there are still no mature and generally feasible reinforcement technologies and means. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a reinforcement device for the single angle steel structure of a transmission tower, which is specifically implemented by the following technical solutions:

[0006] The reinforcement device applied to the single-angle steel structure of the transmission tower is connected to the single-angle steel structure of the transmission tower, and includes: a clip and at least one reinforcing angle steel; the reinforcing angle steel is externally or internally attached to the single-angle steel structure to form an angle steel fitting with a multiple-layer structure, and the clip is clamped with the two tips of the angle steel fitting to achieve a detachable connection with the fitting.

[0007] A further design of the reinforcement device applied to the single-angle steel structure of the transmission tower is that the clip includes: two fasteners including a detour portion and an adjusting connector for connecting the two fasteners, each fastener is abutted against two end faces of a limb tip of the angle steel fitting through the detour portion to form a fixed fulcrum, and the two fixed fulcrums and the vertex of the single-angle steel structure form a triangular structure.

[0008] A further design of the reinforcement device applied to the single-angle steel structure of the transmission tower is that the fastener 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.

[0009] A further design of the reinforcement device applied to the single angle steel structure of the transmission tower is that α∈[44, 46].

[0010] A further design of the reinforcement device applied to the single-angle steel structure of a power transmission tower is that the adjustment connecting piece is a connecting sleeve with an internal thread.

[0011] A further design of the reinforcement device applied to the single-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.

[0012] A further design of the reinforcement device applied to the single 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 the single angle steel component of the transmission tower.

[0013] A further design of the reinforcement device applied to the single angle steel structure of the transmission tower is that when the angle steel fitting is a three-layer structure, two reinforcement angle steels are respectively located inside and outside the single angle steel structure.

[0014] A further design of the reinforcement device applied to the single angle steel structure of the power transmission tower is that the single angle steel structure or the reinforced angle steel of the power transmission tower located in the triangular structure needs to be back-shoveled.

[0015] The present invention also provides a method for reinforcing a single-angle steel structure of a transmission tower using the reinforcement device applied to the single-angle steel structure of a transmission tower, characterized in that the reinforcing angle steel is internally attached or externally wrapped in the area to be reinforced of the single-angle steel structure of the transmission tower to form an angle steel fitting part with a multiple-layer structure, at least three clips are installed on the angle steel fitting part at intervals, and the interval between the clips is set to 4 to 5 times the width of the limbs of the single-angle steel structure. After the clips are respectively abutted against the two limb tips of the fitting part to form a tight hoop, the reinforcement operation is completed.

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

[0017] The invention provides a reinforcement device for a single angle steel structure of a power transmission tower. The device forms an L-shaped composite cross section by partially or fully attaching or externally wrapping the reinforced angle steel to the original single angle steel, or by attaching or externally wrapping the reinforced angle steel at the same time. The round steel buckle can ensure that the externally wrapped and internally attached angle steels are firmly attached to the original angle steel and work in coordination, thereby increasing the moment of inertia of the composite cross section and reducing the slenderness ratio of the angle steel, thereby achieving the purpose of increasing the compressive and bending bearing capacity of the original single angle steel.

[0018] The reinforcement method using the above reinforcement device does not require welding and drilling on the original angle steel, and can achieve in-situ non-destructive reinforcement. This method further improves the bearing capacity of the transmission tower and angle steel structure, ensures the safety and reliability of power grid operation, and reduces the economic losses caused by the collapse of the transmission tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional view of a reinforcement device applied to a single angle steel structure of a transmission tower (using an outsourcing method for the reinforcement angle steel).

[0020] Figure 2 for Figure 1 A side view of a cross-sectional view of a reinforcement device applied to a single angle steel structure of a transmission tower is shown.

[0021] Figure 3 To adopt Figure 1 The schematic diagram shown is a reinforcement device used for the single angle steel structure of a transmission tower to reinforce the angle steel parts of the tower.

[0022] Figure 4 It is a cross-sectional view of a reinforcement device applied to a single angle steel structure of a transmission tower (the reinforcement angle steel is pasted inside and is in an unconfined state).

[0023] Figure 5 for Figure 4 A side view of a cross-sectional view of a reinforcement device applied to a single angle steel structure of a transmission tower is shown.

[0024] Figure 6 To adopt Figure 4 The schematic diagram shown is a reinforcement device used for the single angle steel structure of a transmission tower to reinforce the angle steel parts of the tower.

[0025] In the figure, 1-single angle steel structure; 2-reinforcement angle steel; 3-positive round steel; 4-negative round steel; 5-adjustment connector. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is described in detail below.

[0027] Embodiment 1

[0028] like Figure 1 The reinforcement device for the single angle steel structure of the power transmission tower of this embodiment is connected to the single angle steel structure 1 of the power transmission tower, and mainly consists of: a buckle and at least one reinforcement angle steel 2. The reinforcement angle steel 2 is externally or internally attached to the single angle steel structure 1 to form an angle steel assembly with a multi-layer structure. The method of attaching the reinforcement angle steel 2 internally to the single angle steel structure 1 of this embodiment can be seen in Figures 1 to 3 The buckle is connected to the two tips of the angle steel fitting piece to realize a detachable connection with the fitting piece.

[0029] The buckle of this embodiment includes: two buckle parts with a detour and an adjustment connecting part 5 for connecting the two buckle parts, each buckle part abuts against two end faces of one limb tip of the angle steel fitting part through the detour to form a fixed fulcrum, see Figure 1 The two fixed fulcrums and the vertex of the single angle steel structure form a triangular structure, ensuring that the reinforced angle steel and the single angle steel structure are reliably connected and work in coordination.

[0030] The fastener of this embodiment is a round steel piece, one end of which is bent α° to form a circuitous portion, and the other end is a connecting portion with a thread, forming a "7" shape as a whole. The spiral directions of the threads of the two fastener connecting parts are opposite, namely: positive thread round steel 3 and negative thread round steel 4, see Figure 1 .

[0031] A further design is that, in this embodiment, α is set to 45.

[0032] The adjusting connector 5 of this embodiment is a connecting sleeve with internal threads, and the internal threads at both ends of the connecting sleeve are adapted to the tooth round steel 3 and the reverse tooth round steel 4. The connecting sleeve is an extended hexagonal nut-like structure, and the length is 4.5 times the diameter of the round steel piece. When assembling the buckle, it is only necessary to rotate the connecting sleeve to retract the positive tooth round steel 3 and the reverse tooth round steel 4 into the connecting sleeve to complete the clamping of the buckle.

[0033] The diameter of the round steel piece is 1.75 times the wall thickness of the single angle steel component of the transmission tower.

[0034] The reinforced angle steel of the transmission tower located in the triangular structure needs to be back-cut to fit the inner chamfer of the single angle steel structure 1 of the transmission tower, so as to achieve a close fit between the two.

[0035] Embodiment 2

[0036] This embodiment adopts the method of outsourcing the reinforcement angle steel 2 to the single angle steel structure. Figures 4 to 6 The single angle steel structure located within the triangular structure needs to be back-shoveled.

[0037] The remaining technical features of this embodiment are the same as those of the first embodiment and will not be described again here.

[0038] Embodiment 3

[0039] The angle steel fitting of this embodiment is a three-layer structure, and the two reinforced angle steels are respectively located inside and outside the single angle steel structure. The inner single angle steel structure and the reinforced angle steel both need to be back-shoveled.

[0040] The remaining technical features of this embodiment are the same as those of the first embodiment and will not be described again here.

[0041] Embodiment 4

[0042] The present embodiment provides a method for reinforcing a single angle steel structure of a transmission tower using a reinforcement device for a single angle steel structure of a transmission tower according to the above-mentioned two side embodiments, specifically comprising: pasting or wrapping a reinforcing angle steel inside or outside a region to be reinforced of the single angle steel structure of the transmission tower to form an angle steel fitting piece with a multi-layer structure, installing at least three clips on the angle steel fitting piece at intervals, wherein the interval between the clips is set to be 4.5 times the limb width of the single angle steel structure, and after the clips are respectively abutted against the two limb tips of the fitting piece to form a tight hoop (the buckle can be locked by tightening the connecting adjustment piece), the reinforcement operation is completed.

[0043] 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 reinforcement device for a single angle steel structure of a power transmission tower, connected to the single angle steel structure of the power transmission tower, characterized in that: It includes: a buckle and at least one reinforcing angle steel; the reinforcing angle steel is externally or internally attached to the single angle steel structure to form an angle steel fitting piece with a multiple-layer structure, and the buckle is clamped with the two tips of the angle steel fitting piece to achieve a detachable connection with the fitting piece.

2. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 1 is characterized in that The buckle includes: two fasteners including a detour portion and an adjusting connector for connecting the two fasteners, each fastener is formed by abutting the two end faces of a limb tip of the angle steel fitting with the detour portion to form a fixed fulcrum, and the two fixed fulcrums and the vertex of the single angle steel structure form a triangular structure.

3. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 1 is characterized in that The fastener 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 threads, and the spiral directions of the threads of the two fastener connecting portions are opposite.

4. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 3 is characterized in that α∈[44，46]。 5. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 3 is characterized in that The adjusting connecting piece is a connecting sleeve with internal threads.

6. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 5 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.

7. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 5 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.

8. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 1 is characterized in that When the angle steel fitting is a three-layer structure, the two reinforcing angle steels are respectively located inside and outside the single angle steel structure.

9. The reinforcement device for the single angle steel structure of a power transmission tower according to claim 2 is characterized in that The single angle steel structure or reinforced angle steel of the transmission tower located in the triangular structure needs to be back-shoveled.

10. A method for reinforcing a single angle steel structure of a power transmission tower using the 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 is attached inside or outside the area to be reinforced of the single angle steel structure of the transmission tower to form a multi-layer structure of the angle steel fitting, and at least three clips are installed on the angle steel fitting at intervals. The interval between the clips is set to 4 to 5 times the width of the single angle steel structure limb. After the clips are respectively against the two limb tips of the fitting to form a tight hoop, the reinforcement operation is completed.

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