Prestress reinforcing device for power transmission tower

Abstract

The invention provides a prestress reinforcing device for a power transmission tower, which is characterized in that prestress reinforcing is carried out on a main material of the tower so as to exactly meet the requirement of reinforcing load, the weight of increased reinforcing angle steel is minimized, the reinforcing angle steel bears corresponding stress after being installed, and the construction operation is convenient.

Description

Technical Field

[0001] The invention relates to the field of electric wire installation, and in particular to a prestressed reinforcement device for a transmission iron tower. Background Art

[0002] With the extensive application of new energy technologies, the grid connection of photovoltaic and wind power stations, and the charging of new energy vehicles, the current passing through some high-voltage lines has increased significantly, and it is necessary to replace wires with larger cross-sections. Large-section wires impose a greater load on the tower, which exceeds the load capacity of the original tower. Replacing the tower with a larger load capacity requires re-expropriation of land for civil construction, which is expensive and has a long construction period. Reinforcement of the original tower can greatly save the cost of building high-voltage lines and save construction time. However, the existing reinforcement method has the disadvantage that the reinforcement effect is not good, and the additional angle steel cannot bear the same force as the original angle steel.

[0003] After the existing overhead transmission lines have been in operation for a period of time, the design standards need to be improved due to the construction of highways or high-speed railways, and the wires need to be re-erected or the towers need to be reinforced. Tower reinforcement usually involves reinforcing the main materials. Summary of the invention

[0004] The technical problem to be solved by the patent of this invention is to provide a prestressed reinforcement device for a transmission tower, which reinforces the main material of the tower body so that the reinforced angle steel bears the corresponding stress after installation, the weight increase of the reinforced angle steel is minimized, and the construction operation is convenient.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A prestressed reinforcement device for a transmission tower, wherein the tower is composed of a main material and a secondary material to form a truss tower structure, the main material load increase value is calculated according to a preset increase in load of the tower, a reinforcement angle steel with a bearing capacity greater than the main material load increase value is selected, and a first connecting plate and a second connecting plate are installed using the connecting bolt holes at both ends of the main material, a reinforcement angle steel comprises a first end and a second end, the first end and the second end each having a group of reinforcement bolt holes, the first end is bolted to the first connecting plate, the second connecting plate has a group of connecting plate bolt holes, the connecting plate bolt holes and the reinforcement bolt holes are offset by a preset distance along the length direction of the reinforcement angle steel, the preset distance is calculated based on the main material load increase value, the cross section of the reinforcement angle steel and The elastic modulus of the reinforcing angle steel is calculated according to the linear strain formula. The second end of the reinforcing angle steel also includes at least one loading circular hole, and the loading circular hole is tapered and chamfered. The second connecting plate and the loading circular hole are provided with a loading long slot hole corresponding to the loading circular hole. The length of the long slot hole is greater than the preset distance. An arc-shaped pad is placed in the long slot hole. The pad has a preset thickness. The pad is aligned with the loading circular hole. A lever is provided. One end of the lever includes a cylinder, which is matched and inserted into the loading circular hole. The other end of the lever is forced to pry the reinforcing angle steel so that the reinforcing bolt hole is aligned with the connecting plate bolt hole. Bolts are inserted into the reinforcing bolt hole and the connecting plate bolt hole to tighten the bolts, thereby realizing prestressed reinforcement of the iron tower.

[0006] Preferably, the cylinder is mounted on one end of a hollow circular tube with a lever length of one meter.

[0007] Preferably, the pad block is 10 mm thick.

[0008] Preferably, the main material is angle steel, and the first connecting plates and the second connecting plates are in two groups, respectively connecting two limbs of the main material.

[0009] Beneficial effects of the invention: The patent of the present invention is used to reinforce the existing transmission towers, and improve the bearing capacity and disaster resistance of the towers. Compared with the existing transmission tower reinforcement method, it has the following advantages. First, the thickness of the large-section main material angle steel is relatively large, and the load value required to be increased is relatively large. Directly using a lever to pry will increase the thickness and increase the resistance arm. When the power arm remains unchanged, there is a problem that the load that the workers can apply is reduced. By adjusting the preset thickness of the pad and the tapered chamfer of the loading hole, in cooperation with the lever, the resistance arm length of the lever can be adjusted, thereby increasing the load increase value when the workers have limited strength, meeting the demand for reinforcement load, and minimizing the weight of the added reinforcement angle steel. Second, the reinforcement angle steel is subjected to corresponding stress after installation. Third, the reinforcement angle steel is prestressed by the cooperation of the lever and the opening on the angle steel, which is convenient for high-altitude construction, reduces costs, and facilitates construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of a transmission tower of the present invention; Figure 2 This is a schematic diagram of the prestressed reinforcement installation of the patent of this invention; Figure 3 This is a schematic diagram of the patented lever of the present invention; Figure 4 This is a schematic diagram of the pad block of the patent of the present invention; Figure 5 This is a cross-sectional view of the patent of this invention. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solutions and advantages of the present invention more clear, the implementation methods of the present invention will be further described in detail below with reference to the accompanying drawings.

[0012] See also Figure 1~Figure 5 A prestressed reinforcement device for a transmission tower, wherein the tower is composed of a main material 1 and a secondary material 2 to form a truss tower structure, a conductor 3 is installed on the tower, a preset load increase is calculated for the main material 1, a reinforcing angle steel 4 with a bearing capacity greater than the load increase of the main material 1 is selected, and the first connecting plate 5 and the second connecting plate 6 are installed using the connecting bolt holes at both ends of the main material 1. A reinforcing angle steel 4 includes a first end and a second end, each of which has a group of reinforcing bolt holes, the first end is bolted to the first connecting plate 5, and the second connecting plate 6 has a group of connecting plate bolt holes, and the connecting plate bolt holes and the reinforcing bolt holes are offset by a preset distance along the length direction of the reinforcing angle steel 4, and the preset distance is determined according to the load increase of the main material 1, the cross section of the reinforcing angle steel 4 and the reinforcing The elastic modulus of the angle steel 4 is calculated based on the linear strain formula. The second end of the reinforced angle steel 4 also includes at least one loading circular hole 11. The loading circular hole 11 is tapered and chamfered. The second connecting plate 6 opens a loading long slot hole 13 corresponding to the loading circular hole 11. The length of the long slot hole 13 is greater than the preset distance. An arc-shaped pad 10 is placed in the long slot hole 13. The pad 10 has a preset thickness. The pad 10 is aligned with the loading circular hole 11. A lever 8 includes a cylinder 12 at one end of the lever 8, which is matched and inserted into the loading circular hole 11. The other end of the lever 8 is forced to pry the reinforced angle steel 4 so that the reinforcement bolt hole is aligned with the connecting plate bolt hole. Bolts 9 are inserted into the reinforcement bolt hole and the connecting plate bolt hole to tighten the tower to achieve prestressed reinforcement.

[0013] The lever 8 is a hollow round tube with a length of one meter and a cylinder 12 is installed at one end. The pad 10 has a thickness of 10 mm. The main material 1 is an angle steel, and the first connecting plate 5 and the second connecting plate 6 are two groups, connecting the two limbs of the main material 1 respectively.

[0014] It is used to reinforce the existing transmission tower to improve the bearing capacity and disaster resistance of the tower. Compared with the existing transmission tower reinforcement method, it has the following advantages. First, the thickness of the large-section main material 1 angle steel is relatively large, and the load value needs to be increased. Directly using the lever 8 to pry will increase the thickness and increase the resistance arm. When the power arm remains unchanged, there is a problem that the load that the worker can apply is reduced. Through the preset thickness adjustment of the pad 10 and the tapered chamfer of the loading circular hole 11, in cooperation with the lever 8, the resistance arm length of the lever 8 is adjusted, thereby increasing the load increase value when the worker's strength is limited, just meeting the demand for reinforcement load, and minimizing the weight of the added reinforcement angle steel 4. Second, the reinforcement angle steel 4 is subjected to corresponding stress after installation. Third, the reinforcement angle steel 4 is prestressed by the cooperation of the lever 8 and the opening on the angle steel, which is convenient for high-altitude construction, reduces costs, and is convenient for construction operation.

[0015] The above-mentioned embodiments of the invention patent are only used as examples and are not intended to limit the invention patent. Any modifications, equivalent substitutions, sub-scheme combinations, improvements, etc. made within the spirit and principles of the invention patent should be included in the scope of protection of the invention patent.

Claims

1. A prestressed reinforcement device for a transmission tower, wherein the tower is composed of a main material and a secondary material to form a truss tower structure, characterized in that The main material load increase value is calculated according to the preset increased load of the iron tower, and a reinforcement angle steel with a bearing capacity greater than the main material load increase value is selected. The first connecting plate and the second connecting plate are installed using the connecting bolt holes at both ends of the main material. A reinforcement angle steel includes a first end and a second end, and the first end and the second end each have a group of reinforcement bolt holes. The first end is connected to the first connecting plate bolt, and the second connecting plate has a group of connecting plate bolt holes. The connecting plate bolt holes and the reinforcement bolt holes are offset by a preset distance along the length direction of the reinforcement angle steel. The preset distance is based on the main material load increase value, the cross-section of the reinforcement angle steel, and the elastic modulus of the reinforcement angle steel according to the linear strain According to the formula, the second end of the reinforcing angle steel also includes at least one loading circular hole, the loading circular hole is tapered and chamfered, the second connecting plate and the loading circular hole are provided with a loading long slot hole corresponding to the loading circular hole, the length of the long slot hole is greater than the preset distance, an arc-shaped pad is placed in the long slot hole, the pad has a preset thickness, the pad is aligned with the loading circular hole, a lever, one end of the lever includes a cylinder, which is matched and inserted into the loading circular hole, the other end of the lever is applied with force to pry the reinforcing angle steel so that the reinforcing bolt hole is aligned with the connecting plate bolt hole, the bolts are inserted into the reinforcing bolt hole and the connecting plate bolt hole to tighten, so as to realize the prestressed reinforcement of the iron tower.

2. The prestressed reinforcement device for a transmission tower according to claim 1 is characterized in that The cylinder is installed at one end of a hollow circular tube with a lever length of one meter.

3. The transmission tower prestressing reinforcement device according to claim 2 is characterized in that The thickness of the cushion block is 10 mm.

4. The transmission tower prestressing reinforcement device according to claim 3 is characterized in that The main material is angle steel, and the first connecting plate and the second connecting plate are two groups, respectively connecting two limbs of the main material.

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