Composite cross arm of extra-high-voltage direct-current emergency repair tower

Abstract

The utility model discloses an extra-high voltage direct current emergency repair tower composite cross arm which comprises a lattice type cross arm section, tower column connecting pieces are arranged at the two ends of the outer portion of the lattice type cross arm section, wire connecting plates are arranged at the ends of the tower column connecting pieces, and the lattice type cross arm section comprises four insulating pipes. Silicone rubber umbrella skirts are arranged on the outer side walls of the four insulating tubes, and an aluminum alloy flange frame is jointly and fixedly connected among the four insulating tubes. The lattice type cross arm sections, the tower column connecting pieces and the wire connecting plates are matched with one another, so that the cross arm ensures the necessary section coefficient and inertia moment of the rush-repair tower, the application of the composite cross arm of the rush-repair tower under the condition of large load is realized, and meanwhile, the composite cross arm can reduce the nominal height of the tower, reduce the distance between lines and reduce the width of a corridor, so that the service life of the tower is prolonged. And the windage yaw clearance value is reduced. By applying the composite cross arm, the first-aid repair work of the + / -800kV direct-current power transmission line can be accelerated, the power failure time is shortened, and the economic loss caused by power failure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary equipment for line repair towers, in particular to a composite cross arm of an ultra-high voltage direct current repair tower. Background Art

[0002] In recent years, the country has vigorously developed ±800kV UHV DC transmission technology. ±800kV UHV DC transmission lines have complex geological structures and changeable meteorological conditions along the lines, which are prone to natural disasters such as freezing, typhoons, landslides and mud-rock flows. These natural disasters may cause accidents such as tower collapse and line disconnection of transmission lines. Once a tower collapse occurs, emergency repair towers are required for rapid repair.

[0003] At present, the composite cross arm used in ±800kV line towers is a pilot application and has not been adopted on a large scale. The composite cross arm used in ±800kV line towers is about 10 meters long, with an outer diameter of 730mm and a single composite cross arm weighing about 1.5 tons. The composite cross arm is too long, inconvenient to transport, and heavy.

[0004] The emergency repair of the collapsed tower of ±800kV UHV DC transmission line requires convenient transportation and assembly to achieve the purpose of rapid repair. Due to the large structural size, high height and heavy conductor load of ±800kv transmission line tower, the general composite cross-arm insulator cannot meet the mechanical strength requirements of ±800 transmission line. To solve the above problems, we studied and designed the composite cross-arm applied to the repair tower of ±800kV UHV DC transmission line. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0007] A composite cross arm of an ultra-high voltage direct current repair tower comprises a lattice cross arm section, both ends of the exterior of the lattice cross arm section are provided with tower column connectors, ends of the tower column connectors are provided with conductor connection plates, the lattice cross arm section comprises four insulating tubes, outer side walls of the four insulating tubes are provided with silicone rubber sheds, both ends of the insulating tubes are provided with round tube flanges, and the four insulating tubes are commonly and fixedly connected with an aluminum alloy flange frame.

[0008] As a preferred solution of the composite cross-arm of the UHV DC repair tower described in the utility model, there are six lattice cross-arm sections, and two adjacent lattice cross-arm sections are fixed by bolts. The cross-section of the lattice cross-arm sections close to the two ends of the six lattice cross-arm sections is conical. After installation with tower column connectors and wire connecting plates, it is convenient to connect with the pole tower columns and suspend the wires.

[0009] As a preferred solution of the composite cross arm of the UHV DC repair tower described in the utility model, the round tube flange and the insulating tube are fixed by bolts, so that adjacent lattice cross arm sections can be connected through the round tube flange.

[0010] As a preferred solution of the composite cross arm of the UHV DC repair tower described in the utility model, an exhaust hole is opened at the end of the round tube flange, the interior of the insulating tube is filled with polyurethane foam, and composite material core rods are inserted at both ends.

[0011] As a preferred solution of the composite cross arm of the UHV DC repair tower described in the utility model, the four aluminum alloy flange frame sections are arranged in a square shape, which is convenient for positioning the insulating tube to form a lattice-type composite insulating section.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model cooperates with each other between the lattice cross arm section, the tower column connector and the conductor connection plate. The cross arm ensures the necessary section coefficient and moment of inertia of the emergency repair tower, solves the application of the composite cross arm of the emergency repair tower under heavy load conditions, and at the same time, the application of the composite cross arm can reduce the height of the tower, compress the distance between the lines, reduce the corridor width, and reduce the wind deviation clearance value. The application of the composite cross arm can speed up the emergency repair work of the ±800kV DC transmission line, shorten the power outage time, and reduce the economic losses caused by the power outage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation of the utility model, the utility model will be described in detail below in combination with the drawings and detailed implementation. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0015] Figure 1 This is a structural schematic diagram of a composite cross arm of a UHV DC repair tower of the utility model;

[0016] Figure 2 The utility model is a schematic diagram of a round tube flange connection of a composite cross arm of an ultra-high voltage direct current repair tower.

[0017] Legend: 1. Lattice cross arm section; 2. Tower column connector; 3. Wire connection plate; 4. Insulating tube; 5. Silicone rubber shed; 6. Aluminum alloy flange frame; 7. Round tube flange. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0019] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0020] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] See also Figure 1-2 The utility model provides a composite cross arm of an ultra-high voltage direct current repair tower, comprising a lattice cross arm section 1, tower column connectors 2 are arranged at both ends of the outer side of the lattice cross arm section 1, and a conductor connection plate 3 is arranged at the end of the tower column connector 2. Six lattice cross arm sections 1 are arranged, and two adjacent lattice cross arm sections 1 are fixed by bolts. The cross sections of the lattice cross arm sections 1 close to the two ends of the six lattice cross arm sections 1 are conical in cross section. After being installed with the tower column connector 2 and the conductor connection plate 3, it is convenient to connect with the pole tower column and suspend the conductor.

[0022] The lattice cross arm section 1 includes four insulating tubes 4, the outer side walls of the four insulating tubes 4 are all provided with silicone rubber sheds 5, both ends of the insulating tubes 4 are provided with round tube flanges 7, the round tube flanges 7 and the insulating tubes 4 are fixed by bolts, so that adjacent lattice cross arm sections 1 can be connected through the round tube flanges 7. An exhaust hole is provided at the end of the round tube flange 7, the inside of the insulating tube 4 is filled with polyurethane foam, and composite material core rods are inserted into the two ends.

[0023] An aluminum alloy flange frame 6 is fixedly connected between the four insulating tubes 4 . The cross-section of the four aluminum alloy flange frames 6 is square, which is convenient for positioning the insulating tubes 4 to form a lattice-type composite insulating section.

[0024] When in use, the ±800kV emergency repair tower lattice composite crossarm includes six lattice crossarm sections 1, which are connected as a whole and connected to the tower column through the tower column connector 2. A single lattice crossarm is composed of four Φ70FRP insulating tubes 4, and both ends of the insulating tube 4 are connected to the round tube flange 7, and the round tube flange 7 is connected by four aluminum alloy angle aluminums to form a lattice frame.

[0025] The lattice composite cross arm is mainly made of Φ70FRP insulating tube 4, the inside of the tube is filled with polyurethane foam, and the outer surface is pressed with silicone rubber umbrella skirt 5. The overall creepage distance of the composed cross arm meets the electrical requirements of ±800kv line.

[0026] Both ends of the lattice composite cross arm are provided with a connecting column hinge seat and a conductor connection plate 3 for hanging conductors. The conductor connection plate 3 can be applied to a straight line repair tower or changed to a tension hanging plate for a tension line repair tower, so that the repair tower can have two functions of a straight line tower and a tension tower. The tension tower function can be realized by adding a guy wire and replacing the cross arm remote connection hardware.

[0027] The cross arm of the lattice repair tower can improve the repair and rapid restoration of power transmission. The use of lattice composite cross arm can reduce the corridor width of the tower, reduce the use height of the repair tower, and improve the insulation level of the tower. It effectively solves the current design problem of the cross arm of the repair tower of ±800kV UHV DC transmission line, and then cooperates with the repair tower to achieve the purpose of rapid repair.

[0028] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A composite cross arm of an ultra-high voltage direct current repair tower, comprising a lattice cross arm section (1), characterized in that: The lattice cross arm section (1) is provided with tower column connectors (2) at both ends of the tower column connector (2), and a conductor connection plate (3) is provided at the end of the tower column connector (2). The lattice cross arm section (1) comprises four insulating tubes (4), and the outer side walls of the four insulating tubes (4) are provided with silicone rubber sheds (5). The two ends of the insulating tubes (4) are provided with round tube flanges (7), and the four insulating tubes (4) are fixedly connected to each other with an aluminum alloy flange frame (6).

2. The composite cross arm of the UHV DC repair tower according to claim 1, characterized in that: Six lattice cross arm segments (1) are provided, and two adjacent lattice cross arm segments (1) are fixed by bolts. Among the six lattice cross arm segments (1), the lattice cross arm segments (1) close to the two ends have conical cross sections.

3. The composite cross arm of the UHV DC repair tower according to claim 1, characterized in that: The circular tube flange (7) and the insulating tube (4) are fixed by bolts.

4. The composite cross arm of the UHV DC repair tower according to claim 1, characterized in that: An exhaust hole is provided at the end of the circular tube flange (7), and the interior of the insulating tube (4) is filled with polyurethane foam.

5. The composite cross arm of the UHV DC repair tower according to claim 1, characterized in that: The four aluminum alloy flange frames (6) are arranged in a square cross section.

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