Large-current three-station isolating switch specially used for 12kV environment-friendly bus coupler isolating cabinet

Abstract

The invention discloses a special high-current three-position isolating switch for a 12kV environment-friendly bus coupler isolating cabinet, and the main points of the technical scheme are that the special high-current three-position isolating switch comprises a mounting plate welding part, one side of the mounting plate welding part is provided with a plurality of first studs, and one side of the mounting plate welding part is fixedly provided with an insulator mounting groove plate; a plurality of insulators are fixedly mounted on one side of the insulator mounting groove plate, a busbar is arranged on one side where the mounting plate is welded, and a plurality of mounting holes are formed in one side of the busbar; by arranging the insulating lead screw, when the operating mechanism is activated, the moving contact moves to a corresponding position through the rotation of the insulating lead screw, the contacts are driven by the insulating lead screw to horizontally move in the connecting, isolating and grounding contact supports, and the contacts are electrically connected with the supports through respective spring contact fingers, and finally a complete three-station isolating switch is formed. The switching-on and switching-off functions and mutual interlocking of the isolating switch and the grounding switch can be realized.

Description

Technical Field

[0001] The invention relates to the technical field of isolating switches, and in particular to a high-current three-position isolating switch specially used for a 12kV environmentally friendly busbar isolating cabinet. Background Art

[0002] With the continuous advancement of science and technology, human beings have higher and higher requirements for power distribution products. Green, environmental protection, energy saving, intelligence, maintenance-free, high reliability and low cost have become the development direction of switchgear. In this context, environmentally friendly inflatable cabinets have become one of the main development directions.

[0003] Existing environmentally friendly inflatable cabinets and busbar isolation cabinets with currents of 2500A and above mostly use circuit breaker insulation as the insulation support of the main circuit of the three-position disconnector. Although it is relatively easy to implement, its structure is complex, the volume is large, the cost is high, and it is not conducive to energy conservation and emission reduction. In particular, after installing CT in the gas box, the height or depth of the gas box of the environmentally friendly busbar isolation cabinet must be increased, resulting in a complex structure. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a high-current three-position isolating switch specially used for a 12kV environmentally friendly busbar isolating cabinet, which solves the problems mentioned in the background technology.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions:

[0006] A high-current three-position disconnector specially used for a 12kV environmentally friendly busbar disconnector, comprising: a mounting plate welding, a plurality of first studs are arranged on one side of the mounting plate welding, an insulator mounting slot plate is fixedly installed on one side of the mounting plate welding, a plurality of insulators are fixedly installed on one side of the insulator mounting slot plate, a bus bar is arranged on one side of the mounting plate welding, a plurality of mounting holes are opened on one side of the bus bar, a plurality of first studs are arranged on one side of the mounting plate welding, the mounting holes are fixedly installed together with the first studs, a plurality of grounding contact supports are fixedly installed on one side of the bus bar, a plurality of second studs are arranged on the other side of the mounting plate welding, a mounting stud is fixedly installed on one end of the second stud, a linkage mechanism is arranged on the other side of the mounting plate welding, the linkage mechanism is fixedly connected to the mounting plate welding through the mounting studs, an operating mechanism is fixedly installed on one side of the linkage mechanism, and the mounting plate welding A rotary sealing device is provided on one side, and the rotary sealing device is fixedly connected to the mounting plate by welding through a fourth stud, a grounding bar is provided on one side of the mounting plate for welding, a grounding connection outlet is provided on one side of the grounding bar, and the grounding bar is fixedly connected to the mounting plate by welding through a third stud, a fixed bracket is fixedly installed on one side of the insulator through a fixed interface, an isolating contact support is fixedly installed on the inner circular wall surface of the fixed bracket, a moving contact is movably installed on the inner circular wall surface of the isolating contact support, a connecting contact support is fixedly installed on one end of the moving contact, a first lap joint interface is provided on one side of the connecting contact support, and second lap joint interfaces are provided on both sides of the isolating contact support, an insulating lead screw is fixedly connected to one end of the rotary sealing device, and the insulating lead screw is threadedly connected to the moving contact, and spring contact fingers are provided inside the connecting contact support, the isolating contact support and the grounding contact support, and the spring contact fingers are electrically connected to the moving contact.

[0007] Preferably, reinforcing ribs are provided on the left, right and middle positions of the welding front side of the mounting plate.

[0008] Preferably, two circles of sealing plate baffles, large and small, are fixedly adhered to the welded exterior of the mounting plate.

[0009] Preferably, the isolation contact support and the grounding contact support are directly or indirectly mounted on the mounting plate and welded to form an integral body with the main circuit arranged on the left, center and right.

[0010] Preferably, a fourth overlap interface is provided on one side of the fixing bracket, a fixing interface is provided on the other side of the fixing bracket, and a third overlap interface in the form of a flat plate is extended upward from both side walls, and the third overlap interface is electrically connected to the second overlap interface.

[0011] Preferably, the isolation contact support and the grounding contact support welded to the mounting plate are coaxially integrated.

[0012] In summary, the present invention mainly has the following beneficial effects:

[0013] By setting an insulating screw, the insulator provides necessary electrical insulation. The busbar on the grounding contact support is connected to the grounding busbar through the third stud, so that the current can be safely connected. The rotating sealing device is welded and fixedly connected to the mounting plate through the fourth stud, which ensures the sealing inside the equipment when the moving contact is operated in different positions, preventing dust and moisture from the external environment from entering. When the operating mechanism is activated, the moving contact moves to the corresponding position through the rotation of the insulating screw. At the same time, the spring contact finger ensures the electrical connection between the moving contact and the connection contact support, the isolation contact support, and the grounding contact support. The connection reliability is improved, the contact resistance and the arc generation are reduced, and the electrical performance of the equipment is improved. The first overlapping interface of the connecting contact support is electrically connected to the second overlapping interface of the isolating contact support to realize the conduction or disconnection of the circuit. The moving contact is driven by the insulating screw to move horizontally in the connecting, isolating and grounding contact brackets, and it forms an electrical connection with each bracket through its own spring contact fingers, finally forming a complete three-position isolating switch, which can realize the closing and opening functions of the isolating switch and the grounding switch and their mutual interlocking, thereby making the structure more compact, the height size small, reducing the cost and facilitating installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the welding structure of the mounting plate of the present invention;

[0016] Figure 3 It is a schematic diagram of the insulator installation slot plate structure of the present invention;

[0017] Figure 4 It is a schematic diagram of the fixed interface structure of the present invention;

[0018] Figure 5 It is a schematic diagram of the spring contact finger structure of the present invention;

[0019] Figure 6 It is a schematic diagram of the structure of the fixing bracket of the present invention;

[0020] Figure 7 It is a schematic diagram of the busbar structure of the present invention;

[0021] Figure 8 It is a schematic diagram of the isolation cabinet structure of the present invention.

[0022] 1. Mounting plate welding; 2. Insulator; 3. Fixed bracket; 4. Connecting contact support; 5. Moving contact; 6. Isolating contact support; 7. Grounding contact support; 8. Bus; 10. Operating mechanism; 11. Linkage mechanism; 12. Mounting stud; 13. Grounding bar; 14. Insulating screw; 15. First lap joint; 16. Second lap joint; 17. Grounding connection outlet; 18. Rotary sealing device; 19. Insulator mounting slot plate; 20. First stud; 21. Sealing plate baffle; 22. Reinforcing rib; 23. Third stud; 24. Fixed interface; 25. Second stud; 26. Fourth stud; 27. Spring contact finger; 28. Mounting hole; 29. ​​Third lap joint; 30. Fourth lap joint. DETAILED DESCRIPTION

[0023] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0024] refer to Figure 1-Figure 8A high-current three-position disconnector specially used for a 12kV environmentally friendly busbar disconnector cabinet comprises: a mounting plate welding 1, a plurality of first studs 20 are arranged on one side of the mounting plate welding 1, an insulator mounting slot plate 19 is fixedly installed on one side of the mounting plate welding 1, a plurality of insulators 2 are fixedly installed on one side of the insulator mounting slot plate 19, a busbar 8 is arranged on one side of the mounting plate welding 1, a plurality of mounting holes 28 are opened on one side of the busbar 8, a plurality of first studs 20 are arranged on one side of the mounting plate welding 1, the mounting holes 28 are fixedly installed together with the first studs 20, a plurality of grounding contact supports 7 are fixedly installed on one side of the busbar 8, a plurality of second studs 25 are arranged on the other side of the mounting plate welding 1, a mounting stud 12 is fixedly installed on one end of the second stud 25, a linkage mechanism 11 is arranged on the other side of the mounting plate welding 1, the linkage mechanism 11 is fixedly connected to the mounting plate welding 1 through the mounting stud 12, an operating mechanism 10 is fixedly installed on one side of the linkage mechanism 11, and a plurality of mounting holes 28 are opened on one side of the busbar 8. A rotary sealing device 18 is arranged, and the rotary sealing device 18 is fixedly connected to the mounting plate welding 1 through a fourth stud 26. A grounding bar 13 is arranged on one side of the mounting plate welding 1, and a grounding connection outlet 17 is opened on one side of the grounding bar 13. The grounding bar 13 is fixedly connected to the mounting plate welding 1 through a third stud 23. A fixed bracket 3 is fixedly installed on one side of the insulator 2 through a fixed interface 24. An isolating contact support 6 is fixedly installed on the inner circumferential wall of the fixed bracket 3. The inner circumferential wall of the isolating contact support 6 is movably arranged. A moving contact 5 is installed, one end of the moving contact 5 is fixedly mounted with a connecting contact support 4, one side of the connecting contact support 4 is provided with a first overlapping interface 15, both sides of the isolating contact support 6 are provided with second overlapping interfaces 16, one end of the rotating sealing device 18 is fixedly connected with an insulating screw 14, the insulating screw 14 is threadedly connected with the moving contact 5, and spring contact fingers 27 are arranged inside the connecting contact support 4, the isolating contact support 6 and the grounding contact support 7, and the spring contact fingers 27 are electrically connected with the moving contact 5.

[0025] By setting the insulating lead screw 14, the insulator 2 provides necessary electrical insulation, and the busbar 8 on the grounding contact support 7 is connected to the grounding bus 13 through the third stud 23, so that the current can be safely connected. The rotating sealing device 18 is fixedly connected to the mounting plate 1 by welding through the fourth stud 26, which ensures the sealing inside the equipment when the moving contact 5 is operated at different positions, and prevents dust and moisture from the external environment from entering. When the operating mechanism 10 is activated, the moving contact 5 moves to the corresponding position through the rotation of the insulating lead screw 14. At the same time, the spring contact finger 27 ensures that the moving contact 5 is in contact with the connecting contact support 4, the isolating contact support 6, and the grounding contact support. The reliability of the electrical connection between the seats 7 reduces the contact resistance and the generation of arcs, and improves the electrical performance of the equipment. The first overlapping interface 15 of the connecting contact support 4 is electrically connected to the second overlapping interface 16 of the isolating contact support 6 to realize the conduction or disconnection of the circuit. The moving contact 5 is driven by the insulating screw 14 to move horizontally in the connecting, isolating and grounding contact brackets, and it forms an electrical connection with each bracket through its respective spring contact fingers 27, and finally forms a complete three-position isolating switch, which can realize the closing and opening functions of the isolating switch and the grounding switch and their mutual interlocking, thereby making the structure more compact, small in height, reducing costs and facilitating installation.

[0026] As a further solution of the present invention, reinforcing ribs 22 are provided at the left, right and middle positions of the front side of the mounting plate welding 1;

[0027] By providing the reinforcing ribs 22, the overall mechanical strength and anti-twisting ability of the mounting plate are effectively improved, ensuring that the equipment can withstand greater mechanical stress during installation and operation, thereby increasing the reliability and service life of the equipment.

[0028] As a further solution of the present invention, two large and small circles of sealing plate baffles 21 are fixedly adhered to the outside of the mounting plate welding 1;

[0029] By providing the sealing plate baffle 21, the sealing performance of the device can be effectively enhanced, dust, moisture and other external pollutants can be prevented from entering the interior of the device, the internal electrical components can be protected, and the operating life of the device can be extended.

[0030] As a further solution of the present invention, the isolation contact support 6 and the grounding contact support 7 are directly or indirectly mounted on the mounting plate welding 1 to form an integral body with the main circuit arranged left, middle and right;

[0031] By providing the isolation contact support 6, the design helps to optimize the current path, reduce electrical interference and energy loss, and improve the electrical performance of the equipment.

[0032] As a further solution of the present invention, a fourth overlap interface 30 is provided on one side of the fixing bracket 3, a fixing interface 24 is provided on the other side of the fixing bracket 3, and a third overlap interface 29 in the form of a flat plate is extended upward from both side walls, and the third overlap interface 29 is electrically connected to the second overlap interface 16;

[0033] By setting up a fixed bracket 3 and by setting up multiple overlapping interfaces (such as a third overlapping interface 29 and a fourth overlapping interface 30) on the fixed bracket 3, the device can provide multiple reliable grounding paths, further enhancing the grounding reliability of the device, ensuring safety under various working conditions, reducing contact resistance, improving the overall electrical performance of the device, and reducing the possibility of heat and loss.

[0034] As a further solution of the present invention, the isolating contact support 6 and the grounding contact support 7 of the mounting plate welding 1 are coaxially integrated;

[0035] By arranging the coaxial integration, the overall rigidity and stability of the isolation contact support 6 and the grounding contact support 7 are enhanced, the deformation and damage caused by mechanical stress during operation are reduced, and the durability and reliability of the equipment are improved.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-current three-position isolating switch specially used for 12kV environmentally friendly busbar isolating cabinet, characterized in that: include: A mounting plate is welded (1), a plurality of first studs (20) are arranged on one side of the mounting plate weld (1), an insulator mounting slot plate (19) is fixedly mounted on one side of the mounting plate weld (1), a plurality of insulators (2) are fixedly mounted on one side of the insulator mounting slot plate (19), a bus bar (8) is arranged on one side of the mounting plate weld (1), a plurality of mounting holes (28) are opened on one side of the bus bar (8), a plurality of first studs (20) are arranged on one side of the mounting plate weld (1), the mounting holes (28) and the first studs (20) are fixedly mounted together, the bus bar A plurality of grounding contact supports (7) are fixedly mounted on one side of the flow row (8); a plurality of second studs (25) are arranged on the other side of the mounting plate welding (1); a mounting stud (12) is fixedly mounted on one end of the second stud (25); a linkage mechanism (11) is arranged on the other side of the mounting plate welding (1); the linkage mechanism (11) is fixedly connected to the mounting plate welding (1) through the mounting stud (12); an operating mechanism (10) is fixedly mounted on one side of the linkage mechanism (11); a rotary sealing device (18) is arranged on one side of the mounting plate welding (1); the rotary sealing device (18) is fixedly connected to the mounting plate welding (1) through a fourth stud (26); a grounding bar (13) is provided on one side of the mounting plate welding (1); a grounding connection outlet (17) is provided on one side of the grounding bar (13); the grounding bar (13) is fixedly connected to the mounting plate welding (1) through a third stud (23); a fixed bracket (3) is fixedly installed on one side of the insulator (2) through a fixed interface (24); an isolating contact support (6) is fixedly installed on the inner circular wall surface of the fixed bracket (3); a moving contact (5) is movably installed on the inner circular wall surface of the isolating contact support (6); A connecting contact support (4) is fixedly mounted on one end of the moving contact (5); a first overlapping interface (15) is provided on one side of the connecting contact support (4); second overlapping interfaces (16) are provided on both sides of the isolating contact support (6); an insulating lead screw (14) is fixedly connected to one end of the rotating sealing device (18); the insulating lead screw (14) is threadedly connected to the moving contact (5); spring contact fingers (27) are provided inside the connecting contact support (4), the isolating contact support (6) and the grounding contact support (7); and the spring contact fingers (27) are electrically connected to the moving contact (5).

2. A high-current three-position isolating switch specially used for 12kV environmentally friendly busbar isolation cabinet according to claim 1, characterized in that: Reinforcing ribs (22) are provided at the left, right and middle positions of the front side of the mounting plate welding (1).

3. A high-current three-position isolating switch specially used for 12kV environmentally friendly busbar isolation cabinet according to claim 2, characterized in that: Two large and small circles of sealing plate baffles (21) are fixedly bonded to the outside of the mounting plate weld (1).

4. A high-current three-position isolating switch specially used for 12kV environmentally friendly busbar isolation cabinet according to claim 3, characterized in that: The isolating contact support (6) and the grounding contact support (7) are directly or indirectly mounted on the mounting plate welding (1) to form a whole with the main circuit arranged on the left, middle and right.

5. A high-current three-position isolating switch specially used for 12kV environmentally friendly busbar isolation cabinet according to claim 4, characterized in that: A fourth overlapping interface (30) is provided on one side of the fixing bracket (3), a fixing interface (24) is provided on the other side of the fixing bracket (3), and a third overlapping interface (29) in the form of a flat plate extends upward from both side walls, and the third overlapping interface (29) is electrically connected to the second overlapping interface (16).

6. A high-current three-position isolating switch specially used for 12kV environmentally friendly busbar isolating cabinet according to claim 5, characterized in that: The isolating contact support (6) and the grounding contact support (7) welded to the mounting plate (1) are coaxially integrated.

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