A device for high-voltage flexible conductor overhang connection

Abstract

The utility model discloses a device for high -voltage soft conductor overhanging lead -in, related to high -voltage soft conductor fixing device technical field, including main transformer room, overhanging lead -in support, pillar insulator, steel core aluminium stranded conductor and insulator support, the top of pillar insulator is equipped with the overhanging lead -in support of steel core aluminium stranded conductor overhanging lead -in, the utility model has the advantages of can avoid GIS wiring end close or oblique to stretch out platform, and the installation, maintenance, test of GIS device are convenient, and the operation is carried out in the tour maintenance platform, and the risk of high altitude falling is greatly reduced, three groups of pillar insulator and overhanging lead -in support replace the large -span crossbeam and three series of suspension insulator string, make high -voltage wire's installation, lead -in, fix greatly simple, safe, convenient, and the relevant cost and construction difficulty greatly reduce, also thoroughly eliminated the risk of glass insulator self -blown after damaging main variation.

Description

Technical Field

[0001] This utility model relates to the technical field of high-voltage flexible conductor fixing devices, specifically a device for cantilevered connection of high-voltage flexible conductors. Background Technology

[0002] The standard design for high-voltage flexible conductor cantilever connection uses a "crossbeam + glass suspension insulator string" method, which has the following problems (taking a 110 kV substation as an example): 1. GIS equipment not only requires installation and maintenance, but also handover tests and periodic preventive tests. Its terminals extend obliquely out of the platform, causing great inconvenience to workers and posing a risk of falling from height. The maintenance department has strong objections to this. 2. The crossbeam is about 11 meters long and about 14.5 meters high. A crossbeam support frame also needs to be built for the installation of the crossbeam, which is costly and difficult to construct. It is only used to suspend three steel-cored aluminum stranded wires of about 9 meters each, which is a waste of resources. 3. The glass insulators in the glass suspension insulator string will spontaneously explode after the insulation strength decreases. The falling glass pieces after the explosion may damage the transformer bushings and other components, with serious consequences that outweigh the benefits. Therefore, we propose a device for high-voltage flexible conductor cantilever connection. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a device for cantilevered connection of high-voltage flexible conductors, solving the problems mentioned in the background section.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution: a device for cantilever connection of high-voltage flexible conductors, including a main transformer room, a cantilever connection bracket, a post insulator, a steel-cored aluminum stranded wire, and an insulator bracket, wherein the top of the post insulator is provided with a cantilever connection bracket for cantilever connection of the steel-cored aluminum stranded wire.

[0005] Furthermore, the cantilevered lead-in bracket includes a channel steel, a first angle steel, a flexible busbar fixing hardware, a first bolt, a second bolt, and a second angle steel. The channel steel is fixedly installed on the top of the post insulator. Two first angle steels are fixedly installed on one side of the top of the channel steel, and a second angle steel is installed on the other side of the top of the channel steel. A first bolt is installed inside the second angle steel, and the first bolt is connected to the channel steel. Flexible busbar fixing hardware is provided on the top of the two first angle steels and on one side of the second angle steel. A second bolt is installed inside the flexible busbar fixing hardware, and the second bolts inside the two flexible busbar fixing hardwares are respectively connected to the first angle steel and the second angle steel.

[0006] Furthermore, a main transformer foundation base is provided at the bottom of the main transformer room, and the main transformer is provided on the top of the main transformer foundation base. The wiring terminals of the GIS device are connected to steel-cored aluminum stranded wires. The steel-cored aluminum stranded wires cooperate with the flexible busbar fixing hardware, and the two ends of the steel-cored aluminum stranded wires are respectively connected to the wiring terminals of the GIS device and the main transformer.

[0007] Furthermore, a GIS device is installed on one side of the main transformer room, and a maintenance platform is installed on one side of the main transformer room and below the GIS device.

[0008] Furthermore, an insulator support is provided on the top of the inspection and maintenance platform, and the support insulator is fixedly connected to the insulator support.

[0009] Furthermore, a fence is installed on the outside of the patrol and maintenance platform.

[0010] This utility model provides a device for the cantilever connection of high-voltage flexible conductors, which has the following beneficial effects: 1. This device for cantilevered connection of high-voltage flexible conductors can prevent the GIS terminal from being close to or extending obliquely out of the platform, which facilitates the installation, maintenance, and testing of GIS devices. The operation can be carried out entirely within the patrol and maintenance platform, greatly reducing the risk of falling from height. 2. This device for cantilevered connection of high-voltage flexible conductors replaces the crossbeam and three strings of suspension insulators with three post insulators and cantilevered connection brackets. It is simple, safe, convenient, low-cost, and easy to install, and completely eliminates the risk of damage to the main transformer after the glass insulators spontaneously explode.

[0011] 3. This device for suspended connection of high-voltage flexible conductors realizes the suspended connection of steel-cored aluminum stranded wires through the setting of the suspended connection bracket. The length of the second angle steel can be adjusted according to the needs to meet the suspended connection of different steel-cored aluminum stranded wires, and the compatibility is high. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the cantilevered guide bracket of this utility model; Figure 4 This is a top view of the cantilevered guide bracket of this utility model.

[0013] In the diagram: 1. Main transformer room; 2. GIS device; 3. Post insulator; 4. Cantilevered lead-in bracket; 6. Main transformer foundation base; 7. Main transformer; 8. Steel-cored aluminum stranded wire; 9. Maintenance platform; 10. Insulator bracket; 11. Fence; 12. Channel steel; 13. First angle steel; 14. First bolt; 15. Flexible busbar fixing hardware; 16. Second bolt; 17. Second angle steel. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Please see Figures 1 to 4 This utility model provides a technical solution: a device for cantilever connection of high-voltage flexible conductors, including a main transformer chamber 1, a cantilever connection bracket 4, a post insulator 3, a steel-cored aluminum stranded wire 8, and an insulator bracket 10. The feature is that the top of the post insulator 3 is provided with a cantilever connection bracket 4 for cantilever connection of the steel-cored aluminum stranded wire 8; through the setting of the cantilever connection bracket 4, the steel-cored aluminum stranded wire 8 connected to the connection end of the GIS device 2 can be cantilevered and connected.

[0016] The cantilevered connection bracket 4 includes a channel steel 12, a first angle steel 13, a flexible busbar fixing hardware 15, a first bolt 14, a second bolt 16, and a second angle steel 17. The channel steel 12 is fixedly installed on the top of the post insulator 3. A connecting post is fixedly installed on one side of the top of the channel steel 12, and the first angle steel 13 is fixed on the connecting post to fix the flexible busbar fixing hardware 15. The second angle steel 17 is movably installed on the other side of the top of the channel steel 12. Specifically, both the channel steel 12 and the second angle steel 17 have several openings for... Adjusting the relative position of the opening between the channel steel 12 and the second angle steel 17 allows for adjustment of the horizontal length of the cantilevered guide bracket 4. The channel steel 12 and the second angle steel 17 are fixedly connected by the first bolt 14. In addition, a flexible busbar fixing hardware 15 is inclinedly provided on the side of the second angle steel 17 away from the channel steel 12. It is worth noting that a second bolt 16 is installed inside the flexible busbar fixing hardware 15, which is used to connect the flexible busbar fixing hardware 15 to the first angle steel 13 or the GIS device 2.

[0017] In some embodiments, the channel steel 12 and the second angle steel 17 have seven ∅18 openings spaced 100mm apart. By adjusting the relative positions of the channel steel 12 and the second angle steel 17, the length of the cantilevered guide bracket 4 can be adjusted between 1500 and 900mm. After adjusting to the required length, the first bolt 14 is used to engage with the openings to fix the channel steel 12 and the second angle steel 17. The extension length of the cantilevered guide bracket 4 can be adjusted by the first bolt 14 according to the length of the steel-cored aluminum stranded wire 8. The flexible busbar fixing hardware 15 at one end of the second angle steel 17 is inclined downward at 30°, and the other flexible busbar fixing hardware 15 is horizontally set on the two first angle steels 13. The flexible busbar fixing hardware 15 can be selected according to the single conductor, double split conductor and conductor type.

[0018] The post insulator 3 is used to fix the cantilevered lead-in bracket 4, which is installed on the insulator bracket 10. It is selected according to the voltage level. Specifically, the length of the 110 kV post insulator is 1220 mm, the bending failure load is 8 kN, and the torsional failure load is 6 kN.m; the length of the 220 kV post insulator is 2400 mm, the bending failure load is 12.5 kN, and the torsional failure load is 8 kN.m.

[0019] Furthermore, a main transformer foundation base 6 is installed at the bottom of the main transformer room 1, and a main transformer 7 is installed on top of the main transformer foundation base 6. A steel-cored aluminum stranded wire 8 is connected to the connection end of the GIS device 2. The steel-cored aluminum stranded wire 8 cooperates with the flexible busbar fixing hardware 15, and one end of the steel-cored aluminum stranded wire 8 is electrically connected to the main transformer 7. The main transformer 7 and the GIS device 2 can be electrically connected through the steel-cored aluminum stranded wire 8.

[0020] A GIS device 2 is installed on one side inside the main transformer room 1. A maintenance platform 9 is installed on one side inside the main transformer room 1 and below the GIS device 2. An insulator bracket 10 is fixed to the maintenance platform 9. The post insulator 3 is fixedly connected to the insulator bracket 10. The insulator bracket 10 is used to fix the post insulator 3 for easy inspection and maintenance.

[0021] The outer side of the patrol and maintenance platform 9 is equipped with a fence 11; the fence 11 can protect the patrol personnel and prevent them from falling from heights.

[0022] In summary, the device for cantilever connection of high-voltage flexible conductors is used by fixing the cantilever connection bracket 4 to the end of the post insulator 3 with bolts. Then, the length of the cantilever connection bracket 4 is adjusted according to the installation requirements. During adjustment, the second angle steel 17 is placed on the channel steel 12 at the required length position, and then the second angle steel 17 is fixed to the channel steel 12 with the first bolt 14 to complete the fixed connection. Then, the steel-cored aluminum stranded wire 8 connected to the connection end of the GIS device 2 is laid on the two flexible busbar fixing hardware 15 respectively. Then, the flexible busbar fixing hardware 15 is fixed to the first angle steel 13 and the second angle steel 17 with the second bolt 16. At the same time, the steel-cored aluminum stranded wire 8 is fixed with the flexible busbar fixing hardware 15 to complete the cantilever connection of the steel-cored aluminum stranded wire 8.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for cantilevered connection of high-voltage flexible conductors, characterized in that: This includes cantilevered connection brackets, GIS devices, and insulator post assemblies; The cantilevered lead-in bracket is horizontally installed on top of the insulator support assembly; Both the cantilevered guide bracket and the GIS device are equipped with flexible busbar fixing hardware for limiting the steel-cored aluminum stranded wire. The steel-cored aluminum stranded wire is cantilevered and connected through the insulator support assembly and the flexible busbar fixing hardware.

2. The device for suspended connection of high-voltage flexible conductors according to claim 1, characterized in that, The insulator post assembly includes an insulator support and a post insulator, wherein the post insulator is fixed to the end of the insulator support near the cantilevered lead-in support.

3. The device for suspended connection of high-voltage flexible conductors according to claim 1, characterized in that: The cantilevered guide bracket includes a channel steel and a second angle steel. Both the channel steel and the second angle steel are provided with multiple openings. The horizontal length of the cantilevered guide bracket is adjusted by adjusting the relative position of the openings between the channel steel and the second angle steel. The openings of the channel steel and the second angle steel are fixedly connected by a first bolt.

4. The device for suspended connection of high-voltage flexible conductors according to claim 3, characterized in that: Both the channel steel and the second angle steel are equipped with the flexible busbar fixing hardware; The flexible busbar fixing hardware of the second angle steel is inclined and located at the end away from the channel steel; The flexible busbar fixing hardware of the channel steel is vertically arranged and located at the end away from the second angle steel.

5. The device for suspended connection of high-voltage flexible conductors according to claim 4, characterized in that: A connecting support is provided between the channel steel and the flexible busbar fixing hardware, and a first angle steel is provided on both sides of the connecting support.

6. The device for suspended connection of high-voltage flexible conductors according to claim 3, characterized in that: The flexible busbar fixing hardware has a second bolt installed inside, which is used to fix the flexible busbar fixing hardware to the channel steel, the second angle steel, or the GIS device.

7. The device for suspended connection of high-voltage flexible conductors according to claim 1, characterized in that: It also includes a main transformer room, with a main transformer foundation base at the bottom of the main transformer room and a main transformer at the top of the main transformer foundation base. One end of the steel-cored aluminum stranded wire is fixedly connected to the main transformer, and the other end of the steel-cored aluminum stranded wire is sequentially pulled to the cantilevered lead-in bracket and the GIS device, and fixed by the flexible busbar fixing hardware.

8. The device for suspended connection of high-voltage flexible conductors according to claim 1, characterized in that: It also includes a patrol and maintenance platform, to which both the GIS device and the insulator support assembly are fixed.

9. The device for suspended connection of high-voltage flexible conductors according to claim 8, characterized in that: The patrol and maintenance platform is surrounded by a fence.

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