800kV extra-high voltage direct current transmission line branch tower

Abstract

The utility model provides a 800kV extra-high voltage direct current transmission line branch tower which comprises a tower head, a tower body and tower legs which are sequentially connected from top to bottom, two sides of the tower head are connected with ground wire cross arms and lead cross arms from top to bottom, and the ground wire cross arms on the two sides are respectively provided with ground wire hanging holes which are symmetrical front and back; the upper plane of the top end of the tower head is rectangular, two corners of the front side of the rectangle are connected with ground wire hanging angle steel, and ground wire hanging holes are formed in the ground wire hanging angle steel; the ground wire cross arm is simple in structure, can meet the requirement of hanging four ground wires at the same time, does not increase the load of the ground wire hanging hole on the ground wire cross arm, and improves the safety of the structure.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power engineering, in particular to an 800kV ultra-high voltage direct current transmission line branch tower. Background Art

[0002] The statements in this section merely provide background technology related to the present invention and do not necessarily constitute prior art.

[0003] In UHV DC transmission line projects, two monopole lines often share one bipolar branch tower. Each monopole line has two ground wires, so a total of four ground wires need to be hung on the bipolar branch tower. In previous projects, the conductors and ground wires in this section were generally loosened at the same time to meet the load conditions of the ground wire hanging point of the bipolar branch tower.

[0004] The inventors found that when the gear spacing is large, loosening the ground wire at the same time still cannot meet the load conditions of the ground wire hanging point of the bipolar branch tower. If the conventional bipolar branch tower pole is still used, it will lead to structural unsafety. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides an 800kV ultra-high voltage direct current transmission line branch tower, which improves the safety of the existing bipolar branch tower hanging four ground wires at the same time.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An 800kV ultra-high voltage direct current transmission line branch tower, comprising:

[0008] The tower head, tower body and tower legs are connected in sequence from top to bottom. The two sides of the tower head are connected with ground wire cross arms and conductor cross arms from top to bottom. The ground wire cross arms on both sides are respectively provided with front-to-back symmetrical ground wire hanging holes;

[0009] The top upper plane of the tower head is rectangular, and two front corners of the rectangle are connected with ground wire hanging angle steels, and ground wire hanging holes are arranged on the ground wire hanging angle steels.

[0010] As a further limitation of the present invention, the top of the ground wire cross arm is trapezoidal.

[0011] As a further limitation of the present invention, the lower plane of the conductor cross arm is rectangular.

[0012] As a further limitation of the present utility model, the ground wire hanging holes on the ground wire cross arm are symmetrically arranged on the upper plane of the ground wire cross arm.

[0013] As a further limitation of the present invention, the ground wire crossarm includes an inner ground wire crossarm and an outer ground wire crossarm, and the length of the outer ground wire crossarm is greater than that of the inner ground wire crossarm; preferably, the length of the outer ground wire crossarm is 15.8m and the length of the inner ground wire crossarm is 13.9m.

[0014] As a further limitation of the present invention, the main material angle between the upper and lower planes of the outer ground wire cross arm is 17°, and the main material angle between the upper and lower planes of the inner ground wire cross arm is 20°.

[0015] As a further limitation of the present invention, the conductor crossarm includes an outer conductor crossarm and an inner conductor crossarm, the outer conductor crossarm is longer than the inner conductor crossarm, preferably, the outer conductor crossarm is 13.3 m long and the inner conductor crossarm is 9.7 m long.

[0016] As a further limitation of the present invention, the main material angle between the upper and lower planes of the outer conductor cross arm is 22°, and the main material angle between the upper and lower planes of the inner conductor cross arm is 32°.

[0017] As a further limitation of the present invention, the layer spacing between the ground wire cross arm and the conductor cross arm is 15m.

[0018] As a further limitation of the present invention, the main materials of the tower head, tower body, tower legs, ground wire crossarm and conductor crossarm are all made of steel.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The 800kV ultra-high voltage direct current transmission line branch tower provided by the utility model is provided with ground wire hanging holes at the top of the ground wire cross arm and the tower head. The structure is simple, can meet the demand of hanging four ground wires at the same time, and will not increase the load of the ground wire hanging hole on the ground wire cross arm, thereby improving the safety of the structure.

[0021] 2. During the hanging process, one ground wire is hung in each ground wire hanging hole, so that the load of each ground wire hanging hole is within the bearing range. There is no need to strengthen the rods of the ground wire crossarms, which saves the amount of pole tower materials, reduces the overall investment of the project, and can achieve good economic and environmental benefits.

[0022] Advantages of additional aspects of the present invention will be partially given in the following description, and partially become apparent from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0024] Figure 1 This is a schematic diagram of the structure of a branch tower for an 800kV ultra-high voltage direct current transmission line provided by the utility model;

[0025] Figure 2 A top view of the top of the tower head provided by the utility model;

[0026] Among them, 1-tower head; 2-tower body; 3-tower leg; 11-outer ground wire cross arm; 12-inner ground wire cross arm; 13-outer conductor cross arm; 14-inner conductor cross arm; 15-ground wire hanging angle steel; 151-ground wire hanging hole. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0028] It should be noted that the following detailed descriptions are exemplary and are intended to provide further description of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0029] In the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In this implementation, an 800kV (applicable to ±800kV) UHV DC transmission line branch tower is proposed, such as Figure 1 As shown, it includes: a tower head 1, a tower body 2 and a tower leg 3 which are sequentially connected from top to bottom.

[0031] In this implementation, ground wire cross arms and conductor cross arms are connected on both sides of the tower head 1 from top to bottom, wherein the ground wire cross arms include an outer ground wire cross arm 11 and an inner ground wire cross arm 12, and the conductor cross arms include an outer conductor cross arm 13 and an inner conductor cross arm 14, and both the outer ground wire cross arm 11 and the inner ground wire cross arm 12 are provided with front-to-back symmetrical ground wire hanging holes.

[0032] like Figure 2 As shown, the top upper plane of the tower head 1 is rectangular, and the two front corners of the rectangle are connected with ground wire hanging angle steels 15, and the ground wire hanging angle steels 15 are provided with ground wire hanging holes 151 (which can be integrally formed with the ground wire hanging angle steel 15, or fixedly connected to the ground wire hanging angle steel 15).

[0033] In this implementation, the tower leg 3 adopts a high-low leg design, which can meet the requirements of different terrain slopes, reduce the base surface opening, and achieve good environmental protection effects.

[0034] The structural form of the above-mentioned 800kV ultra-high voltage direct current transmission line branch tower described in the utility model is provided with ground wire hanging holes on the top of the ground wire cross arm and the tower head 1, which can meet the demand of hanging four ground wires at the same time; during the hanging process, each ground wire hanging hole hangs a ground wire, so that the load of each ground wire hanging hole is within the bearing range, and there is no need to strengthen the rods of the ground wire cross arm, which saves the material amount of the tower, reduces the overall investment of the project, and can achieve good economic and environmental benefits.

[0035] In a specific implementation of the present invention, the upper planes of the outer ground wire cross arm 11 and the inner ground wire cross arm 12 are trapezoidal, and the lower planes of the outer conductor cross arm 13 and the inner conductor cross arm 14 are rectangular.

[0036] In a specific implementation of the present invention, the ground wire hanging holes on the outer ground wire cross arm 11 and the inner ground wire cross arm 12 are symmetrically arranged at the ends of the upper planes of the outer ground wire cross arm 11 and the inner ground wire cross arm 12 .

[0037] In a specific implementation of the present invention, the length of the outer ground wire crossarm 11 is 15.8m, the length of the inner ground wire crossarm 12 is 13.9m, the length of the outer conductor crossarm 13 is 13.3m, and the length of the inner conductor crossarm 14 is 9.7m. The root height of the connection between the ground wire crossarm and the tower body is 4.4m, and the root height of the connection between the conductor crossarm and the tower body is 4.2m. It can be understood that the above-mentioned length data and height data here are preferred data, and technical personnel in this field can make appropriate adjustments based on the size of the branch tower, which will not be illustrated here one by one.

[0038] In a specific implementation of the present invention, the main material angle of the upper and lower planes of the outer ground wire crossarm 11 is 17°, the main material angle of the upper and lower planes of the inner ground wire crossarm 12 is 20°, the main material angle of the upper and lower planes of the outer conductor crossarm 13 is 22°, and the main material angle of the upper and lower planes of the inner conductor crossarm 14 is 32°; it can be understood that the above-mentioned angle data here are all preferred data, and technical personnel in this field can appropriately adjust the angles according to different operating conditions, which will not be illustrated here one by one.

[0039] In a specific implementation of the present invention, the interlayer spacing between the ground wire crossarm and the conductor crossarm is 15.0m. It can be understood that the above interlayer spacing data here are all preferred data. Technical personnel in this field can make appropriate adjustments based on the size of the branch tower, which will not be illustrated here one by one.

[0040] In a specific implementation of the utility model, the main materials of the tower head 1, tower body 2, tower leg 3, ground wire cross arm (including outer ground wire cross arm 11 and inner ground wire cross arm 12) and conductor cross arm (including outer conductor cross arm 13 and inner conductor cross arm 14) are all Q420 high-strength steel.

[0041] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An 800kV ultra-high voltage direct current transmission line branch tower, characterized in that: include: The tower head, tower body and tower legs are connected in sequence from top to bottom. The two sides of the tower head are connected with ground wire cross arms and conductor cross arms from top to bottom. The ground wire cross arms on both sides are respectively provided with front-to-back symmetrical ground wire hanging holes; The top upper plane of the tower head is rectangular, and two front corners of the rectangle are connected with ground wire hanging angle steels, and ground wire hanging holes are arranged on the ground wire hanging angle steels.

2. The 800kV UHV DC transmission line branch tower according to claim 1, characterized in that: The top of the ground wire crossarm is trapezoidal.

3. The 800kV ultra-high voltage direct current transmission line branch tower according to claim 1, characterized in that: The lower plane of the conductor cross arm is rectangular.

4. The 800kV UHV DC transmission line branch tower according to claim 1, characterized in that: The ground wire hanging holes on the ground wire cross arm are symmetrically arranged on the upper plane of the ground wire cross arm.

5. The 800kV UHV DC transmission line branch tower according to claim 1, characterized in that: The ground wire cross arm includes an inner ground wire cross arm and an outer ground wire cross arm, and the length of the outer ground wire cross arm is greater than the length of the inner ground wire cross arm.

6. The 800kV UHV DC transmission line branch tower according to claim 5, characterized in that: The main material angle between the upper and lower planes of the outer ground wire cross arm is 17°, and the main material angle between the upper and lower planes of the inner ground wire cross arm is 20°.

7. The 800kV UHV DC transmission line branch tower according to claim 1, characterized in that: The conductor cross arm comprises an outer conductor cross arm and an inner conductor cross arm, and the length of the outer conductor cross arm is greater than the length of the inner conductor cross arm.

8. The 800kV UHV DC transmission line branch tower according to claim 7, characterized in that: The main material angle between the upper and lower planes of the outer conductor cross arm is 22°, and the main material angle between the upper and lower planes of the inner conductor cross arm is 32°.

9. The 800kV UHV DC transmission line branch tower according to claim 1, characterized in that: The layer spacing between the ground wire cross arm and the conductor cross arm is 15m.

10. The 800 kV UHV DC transmission line branch tower according to any one of claims 1 to 9, characterized in that: The main materials of the tower head, tower body, tower legs, ground wire crossarm and conductor crossarm are all made of steel.

Images