Bus bridge adopting flexible connection for low-voltage side output bus in power distribution room

Abstract

The utility model discloses a bus bridge with a low-voltage side output bus in a distribution room adopting flexible connection. The utility model aims to solve the problems in the prior art that a rigid connection structure is easy to loosen, power supply faults are easy to generate and the maintenance cost is increased because an output bus of a main transformer bushing is led from a bus bridge to a medium-voltage wire inlet switch cabinet and is formed by correspondingly and rigidly connecting a plurality of sections of buses. According to the technical scheme, the device comprises a flange box, a bridge box, a wire inlet bridge pier and a bus extending into the wire inlet bridge pier, the bridge box is connected to the flange box, one end of the wire inlet bridge pier is connected with the bridge box, and the other end of the wire inlet bridge pier is connected with a cabinet top wire inlet of a medium-voltage wire inlet switch cabinet in a power distribution room. The device is characterized in that the flange box is hung on the top side in a power distribution room through a hanging bracket to be fixed, and an output bus end of a main transformer sleeve is connected with an input bus end of the flange box through a bus flexible connection structure.

Description

Technical Field

[0001] The utility model relates to a bus bridge in a power distribution room of a power supply system, in particular to a bus bridge with a soft connection for the low-voltage side output bus in the power distribution room. Background Art

[0002] In a power supply system, the bus at the low-voltage side output end of the main transformer in the high-voltage room is often led to the medium-voltage incoming switch cabinet in the power distribution room through the main transformer bushing on the partition wall between the high-voltage room and the power distribution room and then through the bus bridge in the power distribution room. The box body assembly of a corner-type long-span bus bridge with the Chinese patent number CN217215513U applied by the applicant before is a bus bridge structure used in a power distribution room. The structure includes a flange ring, a flange box, a bridge box, and an incoming line pier. Among them, the flange ring is installed and fixed on the outer side wall of the pipe window of the main transformer bushing on one side of the power distribution room, the flange box is connected to the flange ring, the bridge box is connected to the flange box, and one end of the incoming line pier is connected to the bridge box and the other end is connected to the top incoming line port of the medium-voltage incoming switch cabinet in the power distribution room. The disadvantage of this solution is that since the output bus from the main transformer bushing is led to the medium-voltage incoming switch cabinet through the bus bridge by rigid connection of multiple sections of buses, when an earthquake occurs, or the medium-voltage incoming switch cabinet or the bus bridge undergoes accidental movement or deformation, or the cooling fans on the medium-voltage incoming switch cabinet or the bus bridge vibrate for a long time, it may cause the loosening of the rigid connection structure on the multiple sections of buses, resulting in a power supply failure in the medium-voltage incoming switch cabinet and increasing the maintenance cost. Summary of the Invention

[0003] In order to overcome the problem in the prior art that the output bus from the main transformer bushing is led to the medium-voltage incoming switch cabinet through the bus bridge by rigid connection of multiple sections of buses, which is prone to loosening of the rigid connection structure under the influence of the working environment, prone to power supply failures, and increasing the maintenance cost, the purpose of the utility model is to provide an improved bus bridge with a soft connection for the low-voltage side output bus in the power distribution room, which can overcome the defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a bus bridge with a soft connection for the low-voltage side output bus in the power distribution room, including a flange box, a bridge box, an incoming line pier, and a bus led therein. Among them, the bridge box is connected to the flange box, one end of the incoming line pier is connected to the bridge box and the other end is connected to the top incoming line port of the medium-voltage incoming switch cabinet in the power distribution room. The characteristic is that: the flange box is fixed by hanging on the top side in the power distribution room through a hanging bracket, and the output bus end of the main transformer bushing is connected to the input bus end of the flange box through a bus soft connection structure.

[0005] The busbar flexible connection structure described in the above technical solution can be composed of multiple layers of metal sheets stacked together. Through the good bending performance of each metal sheet itself, the flexibility of the busbar flexible connection structure can be achieved.

[0006] A flexible insulating sleeve can be sleeved on the outside of the busbar flexible connection structure described in the above technical solution to ensure that the busbar flexible connection structure will not be exposed in the distribution room and cause problems with electricity production safety.

[0007] The output busbar end section of the main transformer bushing and the input busbar end section of the flange box described in the above technical solution can both adopt a laminated busbar structure to facilitate the connection and cooperation with the busbar flexible connection structure.

[0008] There can be two hanging brackets described in the above technical solution, which are respectively hooked on the left side and the right side of the flange box.

[0009] The hanging bracket described in the above technical solution can be composed of an upper hanging bracket section and a lower hanging bracket section cooperating together. The upper end of the upper hanging bracket section is provided with a first bending part for connecting and fixing to the top side in the distribution room, and the lower end of the lower hanging bracket section is provided with a second bending part for hooking the bottom side of the flange box. A number of screw holes are arranged vertically on the upper hanging bracket section and the lower hanging bracket section respectively. The upper hanging bracket section and the lower hanging bracket section are connected and fixed together by passing screws through the screw holes and then locking with nuts. The beneficial effect of the present utility model is that since the flange box is no longer installed and fixed on the flange ring on the outer side wall of the pipe window of the main transformer bushing, but instead is fixed by being hung on the top side in the distribution room by a hanging bracket, and then a busbar flexible connection structure is connected between the output busbar end of the main transformer bushing and the input busbar end of the flange box. Therefore, when earthquakes occur, or the medium-voltage incoming switchgear or the busbar bridge undergoes accidental movement or deformation, or the long-term vibration of the cooling fans on the medium-voltage incoming switchgear or the busbar bridge, etc., when the positional relationship between the output busbar end of the main transformer bushing and the input busbar end of the flange box changes, the flexible deformation of the busbar flexible connection structure itself can be used to make up for the difference in the changed positional relationship, so as to ensure that the rigid connection structure between the multi-segment busbars from the output busbar of the main transformer busbar led to the medium-voltage incoming switchgear through the busbar bridge will not be overly pulled and loosened, effectively reducing the power supply failures and maintenance costs of the medium-voltage incoming switchgear.

[0010] The following further describes the present utility model in conjunction with the drawings and embodiments. Description of the Drawings

[0011] Figure 1 It is a schematic diagram of an embodiment of the present utility model, and the flexible insulating sleeve is not sleeved on the outside of the busbar flexible connection structure in the figure.

[0012] Figure 2 Is Figure 1Schematic diagram of a front enlarged partial cross-section of a busbar flexible connection structure.

[0013] Figure 3 is Figure 1 Schematic diagram of an enlarged three-dimensional view of the separation of components of a hanger in

[0014] In the figure: 1. Flange box; 2. Bridge box; 3. Inlet pier; 4. Busbar; 5. Medium-voltage inlet switchgear; 6. Hanger; 7. Main transformer bushing; 8. Output busbar end; 9. Busbar flexible connection structure; 10. Input busbar end; 11. Metal sheet; 12. Flexible insulating sleeve; 13. Upper section of the hanger; 14. Lower section of the hanger; 15. First bending part; 16. Second bending part; 17. Screw hole; 18. Screw; 19. Nut. Specific implementation mode

[0015] Referring to Figures 1 to 3 , the low-voltage side output busbar in this distribution room adopts a flexible connection busbar bridge, including a flange box 1, a bridge box 2, an inlet pier 3 and a busbar 4 extending therein. The bridge box 2 is connected to the flange box 1, and one end of the inlet pier 3 is connected to the bridge box 2 and the other end is connected to the top inlet of the medium-voltage inlet switchgear 5 in the distribution room. The characteristics are: the flange box 1 is fixed by hanging through a hanger 6 on the top side in the distribution room, and the output busbar end 8 of the main transformer bushing 7 is connected to the input busbar end 10 of the flange box 1 through a busbar flexible connection structure 9.

[0016] In addition, as Figure 2 shown, the busbar flexible connection structure 9 is composed of multiple layers of metal sheets 11 stacked together. Through the good bending performance of each layer of metal sheet itself, the bendability of the busbar flexible connection structure 9 is realized.

[0017] A flexible insulating sleeve 12 is sleeved outside the busbar flexible connection structure 9 to ensure that the busbar flexible connection structure 9 will not be exposed in the distribution room and cause electrical safety problems.

[0018] There are two hangers 6, which respectively hook the left side and the right side of the flange box 1.

[0019] As Figure 3 shown, the hanger 6 is composed of an upper section of the hanger 13 and a lower section of the hanger 14 cooperating together. The upper end of the upper section of the hanger 13 is provided with a first bending part 15 for connecting and fixing to the top side in the distribution room, the lower end of the lower section of the hanger 14 is provided with a second bending part 16 for hooking the bottom side of the flange box 1, and a number of screw holes 17 arranged up and down are respectively provided on the upper section of the hanger 13 and the lower section of the hanger 14. The upper section of the hanger 13 and the lower section of the hanger 14 are connected and fixed together by passing a screw 18 through the screw holes 17 and then locking with a nut 19.

Claims

1. A busbar bridge with a soft connection for the output busbar on the low-voltage side in a power distribution room, comprising a flange box, a bridge box, an incoming line bridge pier and a busbar extended therein, wherein the bridge box is connected to the flange box, one end of the incoming line bridge pier is connected to the bridge box and the other end is connected to the top incoming line port of the medium-voltage incoming line switch cabinet in the power distribution room, characterized in that: The flange box is fixed by being hung on the top side of the power distribution room through a hanger, and the output busbar terminal of the main transformer bushing is connected to the input busbar terminal of the flange box through a busbar soft connection structure.

2. According to claim 1, the output busbar on the low-voltage side of the power distribution room adopts a busbar bridge with a soft connection, characterized in that: The busbar flexible connection structure is formed by stacking multiple layers of metal sheets.

3. The low-voltage output bus in the power distribution room according to claim 1 or 2 adopts a bus bridge with a soft connection, characterized in that: A soft insulating sleeve is sleeved on the outer side of the busbar soft connection structure.

4. According to claim 2, the output busbar on the low-voltage side of the power distribution room adopts a busbar bridge with a soft connection, characterized in that: The output busbar terminal section of the main transformer bushing and the input busbar terminal section of the flange box both adopt a laminated busbar structure.

5. The low-voltage output bus in the power distribution room according to claim 1 or 2 adopts a bus bridge with a soft connection, characterized in that: The hanger is provided with two, and the hooks are respectively hung on the left side and the right side of the flange box.

6. The low-voltage output bus in the power distribution room according to claim 1 or 2 adopts a bus bridge with a soft connection, characterized in that: The hanger is composed of an upper hanger section and a lower hanger section that cooperate with each other. The upper end of the upper hanger section is provided with a first bent portion that is connected and fixed to the top side of the distribution room, and the lower end of the lower hanger section is provided with a second bent portion that is hooked on the bottom side of the flange box. The upper hanger section and the lower hanger section are respectively provided with a plurality of nail holes arranged up and down. The upper hanger section and the lower hanger section are connected and fixed together by passing screws through the nail holes and then tightening with nuts.

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