Multi-loop narrow-base power transmission tower

Abstract

The utility model discloses a multi-loop narrow-base power transmission tower which comprises a tower body, and the tower body comprises a tower body with a space frame structure and tower legs arranged at the bottom of the tower body. The top ends of the reinforcing beams are connected to the tower body, the bottom ends of the reinforcing beams are connected to the tower legs, the top ends of the reinforcing beams are converged at one point, and the bottom ends of the reinforcing beams are radially diffused in the direction away from the axis of the tower body; by changing the tower body structure and adjusting the proportion of the iron tower root distance to the tower height, the occupied area of the steel tube tower is reduced, the problems that a conventional iron tower is large in occupied area and large in material consumption are effectively solved, the width of a line corridor is reduced, and therefore land resources and steel resources are saved, demolition and vegetation damage are reduced, and the construction cost is reduced. And resource saving and environmental protection are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of power transmission engineering and relates to a multi-circuit narrow-base power transmission tower. Background Art

[0002] With the rapid development of urban construction, the construction of power grids has also ushered in rapid development, and the transmission capacity has been greatly improved. At the same time, with the development of urban construction, land resources are becoming increasingly scarce. Therefore, the corridor requirements for 110kV, 220kV, and 500kV lines with higher voltage levels are becoming higher and higher, and four-circuit lines with mixed voltage on the same tower are increasingly being adopted. The tower height and root opening ratio of conventional iron towers is 4-6, which leads to a large area of ​​iron towers and a large amount of consumables when erecting four circuits on the same tower, which wastes land resources and physical resources and damages the environment.

[0003] In order to solve the above problems, it is necessary to improve the existing mixed pressure steel tube tower to reduce the floor space, reduce steel consumption and save various resources. Utility Model Content

[0004] In view of this, the utility model provides a multi-circuit narrow-base transmission tower, which adopts a frame structure tower body and reduces the ratio of the tower base to the tower height, so as to achieve the purpose of reducing the occupied area, reducing the width of the line corridor, saving land resources and steel resources, and protecting the environment.

[0005] The utility model discloses a multi-circuit narrow-base transmission tower, comprising a tower body, wherein the tower body comprises a tower body with a space frame structure and tower legs arranged at the bottom of the tower body; and further comprising a reinforcing beam, wherein the top end of the reinforcing beam is connected to the tower body, and the bottom end of the reinforcing beam is connected to the tower leg, and a plurality of reinforcing beams are arranged, the top ends of the plurality of reinforcing beams converge at one point, and the bottom ends of the plurality of reinforcing beams are radially diffused in a direction away from the tower body axis.

[0006] Furthermore, the ratio of the tower base to the tower height of the tower body is between 1 / 10 and 1 / 14.

[0007] Furthermore, it also includes a crossarm assembly, which includes a 500kV upper crossarm, a 500kV middle crossarm, a 500kV lower crossarm, a 220kV upper crossarm and a 220kV lower crossarm installed on the tower body from top to bottom, and the 500kV upper crossarm is arranged on the top of the tower body.

[0008] Furthermore, it also includes a ground wire bracket, which is arranged obliquely upward on the 500kV upper cross arm, and the end of the ground wire bracket extends outward and exceeds the end of the 500kV upper cross arm.

[0009] Furthermore, the distance from the end of the ground wire support to the tower body is equal to the distance from the end of the 220kV lower cross arm to the tower body.

[0010] Furthermore, the 500kV upper cross arm, the 500kV middle cross arm, the 500kV lower cross arm, the 220kV upper cross arm and the 220kV lower cross arm are all inverted triangular structures.

[0011] Beneficial effects of the utility model:

[0012] The utility model discloses a multi-circuit narrow-base transmission tower, which increases the overall structural strength of the iron tower by changing the tower body structure and adding a reinforcing beam structure at the tower leg position, while changing the ratio of the iron tower root opening to the tower height, thereby reducing the footprint of the steel pipe tower, effectively solving the problems of large footprint and large material consumption of conventional iron towers, reducing the width of the line corridor, thereby saving land resources and steel resources, reducing demolition and vegetation damage, and being beneficial to resource conservation and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0014] Figure 1 It is a schematic diagram of the structure of the utility model. It should be noted that in the description of this specification, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0015] As shown in the figure, the utility model discloses a multi-circuit narrow-base transmission tower, including a tower body, the tower body including a tower body 1 with a space frame structure and a tower leg 2 arranged at the bottom of the tower body 1, and also including a reinforcing beam 8, the reinforcing beam 8 has a top and a bottom, the top of the reinforcing beam is connected to the tower body, the bottom of the reinforcing beam is connected to the tower leg, and a plurality of reinforcing beams are provided, the tops of the plurality of reinforcing beams converge at one point, and the bottoms of the plurality of reinforcing beams are radially diffused in a direction away from the axis of the tower body. As shown in the figure, the top of each reinforcing beam is upward and connected to the middle of the bottom surface of the frame structure tower body, that is, converged at one point, and the bottoms of the respective reinforcing beams are respectively away from and diffused outwardly at different positions connected to the tower leg, that is, any reinforcing beam is angled with the central axis of the tower body (that is, the axis in the height direction, that is, AA in the attached figure), so that the plurality of reinforcing beams as a whole form an umbrella-shaped radial support structure. The support structure effectively enhances the support strength of the tower leg to the tower body, so that the floor space of the tower can be reduced under the same tower height.

[0016] The ratio of the tower root opening to the tower height of the tower body is between 1:10 and 1:14, that is, the tower height is 10 to 14 times the tower root opening. If the difference between the tower height and the tower root opening is less than 10 times, the floor area is too large and too much material is used; if the difference between the tower height and the tower root opening is greater than 14 times, the tower floor area is too small and the support strength is difficult to ensure. The tower body in this embodiment is a steel structure, and the main and auxiliary materials of the tower body 1 and the tower leg 2 are steel pipes; the tower body as a whole adopts a multi-layer portal frame structure to form a space frame structure, and a plurality of reinforcing beams 8 are arranged on the tower leg 2 to effectively enhance the structural strength. On this basis, this embodiment adjusts and limits the tower root opening and the tower height of the tower body, effectively reducing the floor area, so as to solve the problem of large floor area and large material consumption of conventional towers, and reduce the width of the line corridor. In this embodiment, the ratio of the tower base to the tower height can be 1:10, that is, the tower height is 10 times the tower base. Under this ratio, the floor area of ​​the entire transmission tower is still smaller than that of a conventional transmission tower. The entire tower is the most stable among the ratio conditions provided in this embodiment, and also has the largest floor area among the ratio conditions provided in this embodiment. This ratio can be applied to places such as soft foundation land or poor address conditions to provide more stable support; the ratio of the tower base to the tower height can be 1:14, that is, the tower height is 14 times the tower base. Under this ratio, the tower has the smallest floor area and can also provide stable support, which is suitable for areas with good geological conditions; in this embodiment, it is preferred that the ratio of the tower base to the tower height is 1:12, that is, the tower height is 12 times the tower base. Under this ratio, the overall transmission tower not only has sufficient structural strength, but also has high economy, and can be applied to construction of different geological landforms, which is the optimal ratio. It should be noted that, in the present embodiment, the tower height is the overall height of the tower body, that is, the height from the foundation to the highest point of the tower. The tower root opening is a design parameter of the steel pipe tower, which refers to the distance between the adjacent or diagonal (diagonal root opening) main steel reference lines of the tower. This is well known to technicians in this technical field and will not be elaborated here.

[0017] In this embodiment, a cross arm assembly is also included, and the cross arm assembly includes a 500kV upper cross arm 3, a 500kV middle cross arm 4, a 500kV lower cross arm 5, a 220kV upper cross arm 6 and a 220kV lower cross arm 7 which are sequentially installed on the tower body 1 from top to bottom, and the 500kV upper cross arm 3 is arranged at the top of the tower body 1. The cross arms are arranged vertically from top to bottom on the tower body 1, as shown in the figure, the transmission voltage is two 500kV and two 220kV, the transmission voltage of the 500kV upper cross arm 3, the 500kV middle cross arm 4, and the 500kV lower cross arm 5 are all two 500kV, and the transmission voltage of the 220kV upper cross arm 6 and the 220kV lower cross arm 7 are all two 220kV; the transmission capacity of the multi-circuit narrow-base transmission tower is large, and the purpose of saving land can also be achieved.

[0018] In this embodiment, a ground wire support 9 is further included, and the ground wire support 9 is obliquely arranged on the 500kV upper cross arm 3, and the end of the ground wire support 9 extends outward and exceeds the end of the 500kV upper cross arm 3. The ground wire support 9 is directly arranged on the 500kV upper cross arm 3, which can effectively reduce the tower head height.

[0019] In this embodiment, the distance from the end of the ground wire support 9 to the tower body 1 is equal to the distance from the end of the 220kV lower cross arm 7 to the tower body 1. The distance here is the distance from the farthest end to the central axis of the tower body 1. Figure 1 As shown, axis AA is the central axis of the tower body and also the center line. L1 is the horizontal distance from the farthest end of the ground wire bracket 9 to the axis AA. L2 is the horizontal distance from the farthest end of the 220kV lower cross arm 7 to the axis AA. The lengths of L1 and L2 are equal. With such an arrangement, on the one hand, the height of the tower head can be reduced, and reducing the height of the tower head also reduces the floor space of the tower; on the other hand, the stability of the tower can be enhanced, which is beneficial to reducing the weight of the tower.

[0020] In this embodiment, the 500kV upper cross arm 3, the 500kV middle cross arm 4, the 500kV lower cross arm 5, the 220kV upper cross arm 6 and the 220kV lower cross arm 7 are all inverted triangle structures. The inverted triangle arrangement can reduce the tower head height, thereby achieving the purpose of saving land resources and steel resources.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A multi-circuit narrow-base transmission tower, characterized in that: The tower body comprises a tower body having a space frame structure and tower legs arranged at the bottom of the tower body; It also includes a reinforcing beam, the top end of which is connected to the tower body, the bottom end of which is connected to the tower leg, and a plurality of reinforcing beams are provided, the top ends of the plurality of reinforcing beams converge at one point, and the bottom ends of the plurality of reinforcing beams spread radially in a direction away from the tower body axis.

2. The multi-circuit narrow-base transmission tower according to claim 1, characterized in that: The ratio of the tower base to the tower height of the tower body is between 1 / 10 and 1 / 14.

3. The multi-circuit narrow-base transmission tower according to claim 1, characterized in that: It also includes a cross arm assembly, which includes a 500kV upper cross arm, a 500kV middle cross arm, a 500kV lower cross arm, a 220kV upper cross arm and a 220kV lower cross arm installed on the tower body in sequence from top to bottom, and the 500kV upper cross arm is arranged on the top of the tower body.

4. The multi-circuit narrow-base transmission tower according to claim 3, characterized in that: It also includes a ground wire support, which is obliquely arranged on the 500kV upper cross arm, and the end of the ground wire support extends outward and exceeds the end of the 500kV upper cross arm.

5. The multi-circuit narrow-base transmission tower according to claim 4, characterized in that: The distance from the end of the ground wire support to the tower body is equal to the distance from the end of the 220kV lower cross arm to the tower body.

6. The multi-circuit narrow-base transmission tower according to claim 4, characterized in that: The 500kV upper cross arm, 500kV middle cross arm, 500kV lower cross arm, 220kV upper cross arm and 220kV lower cross arm are all inverted triangle structures.

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