Three-phase common-box bus

Abstract

The utility model discloses a three-phase common-box bus which comprises an outer shell, flanges are fixedly connected to the two ends of the outer shell, flange holes are formed in the edges of the side edges of the flanges, square grooves are formed in the two ends of the top of the outer shell, and fixing blocks are fixedly connected to the inner side walls of the square grooves. Through cooperative use of the outer shell, the flange, the flange hole, the cover plate, the hinge, the handle, the square groove, the fixed block, the insulator, the conductive plate, the threaded hole, the bolt and the connecting through hole, the three-phase common box bus can be directly butted with the existing 3150-ampere product, so that the product is convenient to upgrade and update, and the practicability of the three-phase common box bus is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-phase common box busbars, in particular to a three-phase common box busbar. Background Art

[0002] As we all know, the common box busbar is one of the basic components of closed combination electrical appliances. It is connected with other components of the closed combination electrical appliances through flow-conducting connectors to meet different main wiring methods to collect, distribute and transmit electric energy. With the in-depth development of my country's urban and rural power grid transformation, the market competition in the high-voltage switchgear industry has become increasingly fierce. The SF6 closed combination electrical appliances, which represent the development direction of high-voltage switches, have made significant progress in miniaturization, high parameters, maintenance-free, intelligentization and aesthetics. Its important component is the common box busbar. The existing common box busbar has 6 external support covers for each busbar barrel over 1 meter long. A small power station with 5 bays often uses about 50 such covers, which is prone to leakage problems. The closed combination electrical appliances generally require an annual leakage rate of SF6 gas ≤1%, which leads to leakage repair of closed combination electrical appliances. It is also a major task of the after-sales service of major closed combination electrical appliance manufacturers.

[0003] As disclosed in the prior art, the technical solution is CN212304644U, a three-phase common-box busbar with temperature compensation, in which a temperature-compensated expansion joint is connected between two adjacent shells through a flange structure; insulators are respectively provided in the inner cavities of the two shells, and the three-phase conductors are commonly connected between the two insulators; a plug-in contact is provided on one of the insulators, and a plug-in contact is also provided at the end of the three-phase conductor at the corresponding position, and the conductors are adjusted by sliding and plugging between the corresponding plug-in contacts at every two positions.

[0004] With the acceleration of urbanization, equipment in all industries needs to be upgraded. Traditional cables, used as transmission conductors, no longer meet the requirements of 126kV, high-current transmission systems, due to technical issues such as low current carrying capacity, high line losses, and high costs. Therefore, a three-phase busbar with a common box design is needed that can be easily upgraded and updated. Utility Model Content

[0005] The purpose of the present utility model is to provide a three-phase busbar in a common box to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: comprising an outer shell, wherein flanges are fixedly connected at both ends of the outer shell, flange holes are formed at the side edges of the flanges, square grooves are formed at both ends of the top of the outer shell, and fixing blocks are fixedly connected to the inner side walls of the square grooves. The outer shell is made of high-quality metal plate, which can effectively protect the internal structure from damage caused by external factors. Flanges are fixed at both ends of the outer shell. The most common connection method currently on the market is to connect two flanges, and the flanges are fixed with bolts. Multiple flange holes are evenly distributed through the inner cavity of the two flanges, and the flange holes are used to pass bolts to connect the two flanges. Two square grooves are formed in the upper inner cavity of the outer shell, and fixing blocks are fixed to the inner walls of each square groove. The fixing blocks are used to support the cover when it is lowered. Multiple hinges are evenly distributed on one side of the cover, and the other side of each hinge is fixed to the top of the outer shell. A handle is fixed on the upper side of each cover, which makes it easier to open and close the cover.

[0007] Preferably, a cover plate is provided on the top of the fixed block, a hinge is installed on the edge of the cover plate through a fastener, one side of the hinge is connected to the outer shell, and a handle is fixedly installed on the edge of the top of the cover plate.

[0008] Preferably, a cylindrical insulator is fixedly installed on the bottom of the inner wall of the shell, a conductive plate is fixed on the top of the insulator via fasteners, a threaded hole is opened through the top of the conductive plate, and a bolt is threadedly connected to the inner cavity of the threaded hole.

[0009] Preferably, a connecting through hole is opened at one end of the top of the conductive plate.

[0010] Preferably, one side of the hinge is connected to the edge of the outer shell, and a handle is fixedly installed at the edge of the top of the cover plate.

[0011] Preferably, two threaded holes are also formed on the top of each of the insulators, and the positions and numbers of the threaded holes on the insulators and the threaded holes on the conductive plates are in one-to-one correspondence.

[0012] Preferably, the bottom of the bolt passes through the threaded hole on the conductive plate and the insulating column in sequence, and is finally threadedly connected to the threaded hole on the insulating column.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The three-phase busbar can be directly connected to existing 3150A products through the coordinated use of the outer shell, flange, flange hole, cover plate, hinge, handle, square groove, fixing block, insulator, conductive plate, threaded hole, bolt and connecting through hole, which is convenient for product upgrading and updating, thereby greatly improving the practicality of the three-phase busbar. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the main inner cavity structure of the utility model.

[0017] Figure 3 For this utility model Figure 2 A magnified view of the structure at center A.

[0018] In the figure: 1. Outer shell; 2. Flange; 3. Flange hole; 4. Cover plate; 5. Hinge; 6. Handle; 7. Square groove; 8. Fixing block; 9. Insulator; 10. Conductive plate; 11. Threaded hole; 12. Bolt; 13. Connecting through hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: See Figure 1-3 The utility model provides a technical solution: a three-phase common box busbar, including an outer shell 1, with flanges 2 fixedly connected at both ends of the outer shell 1, flange holes 3 are opened at the side edge positions of the flange 2, square grooves 7 are opened at both ends of the top of the outer shell 1, and fixed blocks 8 are fixedly connected to the inner side walls of the square grooves 7.

[0021] Among them, a cover plate 4 is provided on the top of the fixed block 8, and a hinge 5 is installed on the edge of the cover plate 4 through fasteners. One side of the hinge 5 is connected to the outer shell 1, and a handle 6 is fixedly installed on the edge of the top of the cover plate 4.

[0022] In this embodiment, the outer shell 1 is made of high-quality metal plates, which can effectively protect the internal structure from damage caused by external factors. Flanges 2 are fixed at both ends of the outer shell 1. The most common connection method on the market is to connect two flanges, and the flanges are fixed with bolts. A plurality of flange holes 3 are opened horizontally through the inner cavity of the two flanges 2 and are evenly distributed. The flange holes 3 are used to pass bolts through so that the two flanges are connected. Two square grooves 7 are opened in the upper inner cavity of the outer shell 1, and fixing blocks 8 are fixed on the inner walls of the two square grooves 7. The fixing blocks 8 are used to allow the cover plate 4 to play a load-bearing role when it is lowered. A plurality of hinges 5 are provided on one side of the cover plate 4 and are evenly distributed. The other side of each hinge is fixedly connected to the top of the outer shell 1. A handle 6 is fixed on one side of the upper side of each cover plate 4. This structure can make the cover plate 4 more convenient to open and close.

[0023] Among them, a cylindrical insulator 9 is fixedly installed at the bottom of the inner wall of the outer shell 1, and a conductive plate 10 is fixed to the top of the insulator 9 through fasteners. A threaded hole 11 is opened through the top of the conductive plate 10, and a bolt 12 is threadedly connected to the inner cavity of the threaded hole 11.

[0024] A connecting through hole 13 is provided at one end of the top of the conductive plate 10 .

[0025] In this embodiment, a plurality of insulators 9 are fixedly installed in the inner cavity of the outer shell 1 and are evenly distributed. A conductive plate 10 is placed horizontally above every three insulators 9. A threaded hole 11 is provided in the inner cavity at the connection between each conductive plate 10 and the insulator 9. A bolt 12 is provided in the inner cavity of each threaded hole 11, so that the conductive plate 10 can be fixed above the insulator 9. A plurality of connecting through holes 13 are provided at one end of the conductive plate 10 and are evenly distributed. The connecting through holes 13 are used to connect various circuits.

[0026] Working principle: The three-phase busbar is used for 126kV high current (4000 amperes). Flange 2 interfaces are fixed at both ends of the outer shell 1. The interfaces can be directly connected with existing 3150 ampere products to facilitate product upgrades and updates, thereby greatly improving the practicality of the three-phase busbar.

[0027] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase busbar, comprising an outer shell (1), characterized in that: Flanges (2) are fixedly connected at both ends of the outer shell (1), flange holes (3) are provided at the side edges of the flanges (2), square grooves (7) are provided at both ends of the top of the outer shell (1), and fixing blocks (8) are fixedly connected to the inner side walls of the square grooves (7).

2. The three-phase busbar according to claim 1, characterized in that: A cover plate (4) is provided on the top of the fixing block (8), a hinge (5) is installed at the edge of the cover plate (4) via a fastener, and the cover plate (4) is installed on the outer shell (1) via the hinge (5).

3. The three-phase busbar according to claim 1, characterized in that: A cylindrical insulator (9) is fixedly mounted on the bottom of the inner wall of the outer shell (1).

4. The three-phase busbar according to claim 3, characterized in that: A conductive plate (10) is fixed to the top of the insulator (9) via fasteners, a threaded hole (11) is provided through the top of the conductive plate (10), and a bolt (12) is threadedly connected to the inner cavity of the threaded hole (11).

5. The three-phase busbar according to claim 4, characterized in that: A connecting through hole (13) is provided at one end of the top of the conductive plate (10).

6. The three-phase busbar according to claim 2, characterized in that: One side of the hinge (5) is connected to the edge of the outer shell (1), and a handle (6) is fixedly mounted on the edge of the top of the cover plate (4).

7. The three-phase busbar according to claim 3, characterized in that: Each of the insulators (9) is also provided with two threaded holes (11) on the top, and the positions and numbers of the threaded holes (11) on the insulator (9) and the threaded holes (11) on the conductive plate (10) are in one-to-one correspondence.

8. The three-phase busbar according to claim 4, characterized in that: The bottom of the bolt (12) passes through the threaded holes on the conductive plate (10) and the insulator (9) in sequence, and is finally threadedly connected to the threaded hole (11) on the bolt (12).

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