CN202767607U - ZV81 tangent tower for plus or minus 400 kV direct-current power transmission line - Google Patents

Abstract

The utility model discloses a ±400kV DC transmission line ZV81 linear tower, the ZV81 linear tower includes a ground wire support, a wire cross arm, a tower head, a tower body and a tower leg; wherein, the ground wire support is arranged at the tower head The upper part of the cross arm is used to hang the ground wire; the wire cross arm is located at the lower part of the tower head and used to hang the phase transmission wires on both sides; the main material of the ZV81 linear tower is medium-strength angle steel. Adopting the embodiment of the utility model can meet the requirement of ±400kV DC transmission line.

Description

A ±400kV DC transmission line ZV81 linear tower

technical field

The utility model relates to the field of high-voltage iron towers, in particular to a ZV81 linear tower of a ±400kV DC transmission line.

Background technique

Previously, ±500kV was the lowest voltage level of DC high-voltage transmission lines in my country. For transmission line projects such as Golmud-Lhasa, due to the small load of the Tibet power grid, it is not economical to use ±500kV. In order to implement the strategic goal of the "Western Development" implemented by the Party Central Committee and the State Council, alleviate the short-term power shortage situation of the Central Tibet Power Grid, meet the long-term social and economic requirements for power development in Tibet, and take into account economic feasibility, my country has successfully completed ±400kV Development and research of direct current transmission technology.

The load of the ±400kV DC transmission line is relatively small, and the fittings for hanging the line are also different, so it is not possible to copy the existing line towers of other voltage levels. Therefore, designing the ZV81 linear tower of the ±400kV direct current transmission line is a technical problem urgently needed to be solved by those skilled in the art.

Utility model content

The technical problem to be solved by the utility model is to provide a ZV81 linear tower of ±400kV DC transmission line, which can meet the requirements of ±400kV DC transmission line.

In order to achieve the above purpose, the utility model provides a ±400kV DC transmission line ZV81 linear tower, the ZV81 linear tower includes a ground wire support, a wire cross arm, a tower body and a tower leg; wherein the ground wire support is set on the The upper part of the wire cross arm is used to hang the ground wire; the wire cross arm is located on the upper part of the tower body and is used to hang the phase transmission wires on both sides;

The main material of the ZV81 linear tower is medium-strength angle steel.

Preferably, the ground wire support is left-right symmetrical, that is, E1=E2, and has a negative protection angle to the wire.

Preferably, the wire crossarm of the ZV81 straight tower is a trapezoidal crossarm, which is symmetrical from left to right, that is, E3=E4, E5=E6.

Preferably, the two-phase conductors of the ZV81 straight tower adopt V-shaped insulator strings.

Preferably, the material at the hanging point of the ZV81 straight tower conductor adopts short angle steel.

Preferably, the ZV81 linear tower is provided with double rest platforms.

Preferably, the ZV81 linear tower adopts all-round long and short legs.

Preferably, the ZV81 linear tower adopts anti-loosening measures for the double cap bolts of the whole tower.

Compared with the prior art, the utility model has the following advantages:

The utility model provides a ZV81 linear tower of a ±400kV DC transmission line. In order to save the weight of the tower and reduce the cost, the lower plane of the wire cross arm is designed as a trapezoid, and the left and right sides are equal in length; because it is located in a plateau area, it is convenient to set up double rest platforms. Tower erection personnel and maintenance personnel assemble towers or maintain them; the whole tower adopts bolt anti-loosening measures, which reduces the workload of maintenance personnel in plateau areas and ensures the safe operation of the line.

Description of drawings

Fig. 1 is the monoline diagram of ± 400kV direct current transmission line ZV81 linear tower of the present utility model;

Fig. 2 is the structural diagram of the ground wire hanging point of the ZV81 linear tower described in the utility model;

Wherein (a) is a top view, (b) is a side view;

Fig. 3 is a structural diagram of the wire hanging point of the ZV81 linear tower described in the present invention.

Detailed ways

In order to make the above purpose, features and advantages of the utility model more obvious and understandable, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, it is a single-line diagram of the ZV81 linear tower of the ±400kV DC transmission line of the present invention.

The ZV81 linear tower includes: a ground wire support 8 , a wire cross arm 9 , a tower body 4 and a tower leg 1 .

The ground wire support 8 is arranged on the top of the tower body 4 . The ground wire support 8 includes two branches, which are respectively located on the left and right sides of the top of the tower body. The upper plane is a closed trapezoid, extending horizontally to the left and right sides of the tower head and maintaining equal length, that is, E1=E2.

The ground wire support 8 is used to hang the ground wire, which protects the two-phase power transmission wires, and adopts a negative protection angle, that is, the distance E2 from the hanging point of the right ground wire to the central axis of the tower body is greater than that of the hanging point of the right wire into the tower body The distance E4 of the axis; the distance E1 from the hanging point of the left ground wire to the central axis of the tower body is greater than the distance E3 from the hanging point of the left wire to the central axis of the tower body.

The wire cross arm 9 is located at the lower part of the ground wire support 8 . The wire cross arm 9 includes two branches, which are respectively located on the left and right sides of the lower part of the tower head. The distance E4 of the axis is equal to the distance E3 from the hanging point of the left conductor to the central axis of the tower body; the distance E6 from the outermost end of the right conductor cross arm to the central axis of the tower body is equal to the distance E5 from the outermost end of the left conductor cross arm to the central axis of the tower body.

The conductor cross-arm 9 is used to suspend the phase transmission conductors on both sides and meet the requirements of electrical clearance.

Preferentially, the two-phase conductors of the ZV81 straight tower adopt V-shaped insulator strings, which reduces the accidents of string drop, reduces the probability of wind flashover, and ensures the safe operation of the project.

Preferably, the ZV81 linear tower is provided with double rest platforms. In view of the characteristics of high-altitude hypoxia and serious work efficiency degradation, in order to ensure adequate rest and personal safety for the line erectors and maintenance personnel of the tower, for the first time, the cross arm of the DC line tower and the tower body are connected 5 and the tower body is sloped. A rest platform is set up.

Preferably, in the ZV81 linear tower described in the present utility model, the ground wire hanging point is directly set on the double angle steel at the end of the ground wire bracket, see Figure 2 for details.

Preferably, the hanging points of the wire V-shaped insulator strings of the ZV81 straight tower are respectively set at the end and root of the cross arm, and both use double angle steel, see Figure 3 for details. With this structure, the welding work at the hanging point is avoided. For the line tower under the condition of high altitude and low temperature, it can effectively strengthen the force bearing capacity of the hanging line node and ensure the strength of the hanging line node and other requirements.

Preferably, the ZV81 straight tower leg 1 adopts all-round long and short legs, which minimizes the amount of earthwork excavation and soil erosion, and protects the fragile ecological environment in the Qinghai-Tibet Plateau region.

Preferably, the ZV81 linear tower leg 1 adopts a common leg 2, which makes the leg structure standardization, facilitates processing, and is also conducive to assembly in plateau areas.

Preferably, the ZV81 linear tower adopts anti-loosening measures for the double cap bolts of the whole tower, which reduces the workload of maintenance personnel and improves the safety of line operation under harsh climate conditions such as cold and hypoxia on the Qinghai-Tibet Plateau.

The ±400kV DC transmission line ZV81 linear tower provided by the utility model has been introduced in detail above. In this paper, specific examples have been used to illustrate the principle and implementation of the utility model. The description of the above embodiments is only used to help understand the utility model. The method of the utility model and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the utility model, there will be changes in the specific implementation and application scope. In summary, the contents of this specification are not It should be understood as a limitation of the present utility model.

Claims (9)

1. one kind ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, described ZV81 tangent tower comprises earth wire support, wire cross-arm, tower head, body of the tower and tower leg; Wherein, described earth wire support is arranged on described tower head top, is used for hanging ground wire; Described wire cross-arm is positioned at described tower head bottom, is used for hanging both sides phase transmission pressure;

Strong angle steel during the main material of described ZV81 tangent tower adopts.

2. according to claim 1 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, described earth wire support bilateral symmetry, and wire is negative shielding angle.

3. according to claim 1 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, described wire cross-arm is trapezoidal cross-arm, and bilateral symmetry.

4. according to claim 1,2 or 3 described ± 400kV DC power transmission line ZV81 tangent towers, it is characterized in that, the wire hitch point of described ZV81 tangent tower is connected LD link plate gold utensil to be connected with suspension insulator with the ground wire hanging point.

5. according to claim 1 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, two phase conductors of described ZV81 tangent tower adopt the V insulator string.

6. according to claim 3 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, the member at described ZV81 tangent tower conducting wire hanging point place adopts angle cleat.

7. according to claim 1 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, described ZV81 tangent tower arranges half space at wire cross-arm and body of the tower junction with place, change slope respectively.

8. according to claim 1 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, described ZV81 tangent tower adopts complete unequel leg extension.

9. according to claim 1 ± 400kV DC power transmission line ZV81 tangent tower is characterized in that, described ZV81 tangent tower adopts full tower double-nut bolt anti-loose structure.

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