Compact split-phase common-air-chamber three-station isolation grounding switch

Abstract

The invention relates to a compact split-phase common-air-chamber three-station isolating grounding switch, which comprises a shell and is characterized in that three groups of three-station conductors and conductors are oppositely arranged in the shell, isolating moving contacts are mounted on the three-station conductors and connected with an upper connecting plate, the upper connecting plate is hinged with a shifting fork, the shifting fork is hinged with a lower connecting plate, and the lower connecting plate is connected with the lower connecting plate. The lower connecting plate is connected with a maintenance grounding moving contact, a maintenance grounding static contact is arranged below the maintenance grounding moving contact, an isolation static contact is installed on the conductor, a rapid grounding static contact is further installed on the conductor, and a rapid grounding moving contact is arranged above the rapid grounding static contact. The beneficial effects of the invention are that the maintenance grounding switch and the isolation switch are combined to use the three-position switch, the static contact of the isolation switch is fused with the rapid grounding switch, so that the design of a main conductive loop is realized, the housing adopts a three-phase common box type integrated structure, the structure is compact, the reliability is high, and the modular grounding switch has the advantages of high modularization and convenient and rapid installation and debugging.

Description

Technical Field

[0001] The present invention belongs to the technical field of power switchgear, and in particular relates to a compact phase-split, common-gas-chamber, three-position isolating and grounding switch. Background Art

[0002] Conventional 220kV combined electrical equipment uses a split-chassis design for isolation and grounding switches, which occupies a large space. They all utilize SF6 gas for insulation. SF6 is widely used in high-voltage electrical equipment due to its excellent insulation properties, high electrical strength, strong arc extinguishing capability, and good chemical stability. Furthermore, existing structural isolation, maintenance grounding, and rapid grounding switches all utilize separate mechanisms, which complicates operation and increases maintenance costs. Summary of the Invention

[0003] In order to overcome the deficiencies of the prior art, the present invention provides a compact three-position isolating and grounding switch with separate phases and a common gas chamber.

[0004] The present invention is achieved through the following technical solutions: A compact phase-split common gas chamber three-position isolating grounding switch includes a shell and is characterized in that: three groups of three-position conductors and conductors are relatively arranged in the shell, an isolating moving contact is installed on the three-position conductor, the isolating moving contact is connected to the upper connecting plate, the upper connecting plate is hinged to the shift fork, the shift fork is hinged to the lower connecting plate, the lower connecting plate is connected to the maintenance grounding moving contact, a maintenance grounding static contact is provided below the maintenance grounding moving contact, an isolating static contact is installed on the conductor, a fast grounding static contact is also installed on the conductor, and a fast grounding moving contact is provided above the fast grounding static contact.

[0005] The quick grounding moving contact is driven by a crank arm, the crank arms are connected via a transmission connecting rod, and the crank arm is connected to a quick grounding operating mechanism.

[0006] The crank arm is installed in a quick grounding crank arm box.

[0007] A static arc contact is provided at the end of the isolating static contact.

[0008] The shift fork is connected to the operating mechanism through an insulating shaft.

[0009] A strap contact finger is provided between the maintenance grounding moving contact and the maintenance grounding static contact.

[0010] The beneficial effects of the present invention are: the maintenance grounding switch and the isolating switch are combined into a three-position switch, and the static contact of the isolating switch is integrated into the quick grounding switch, thereby realizing the design of the main conductive circuit. The shell adopts a three-phase common box integrated structure with a compact structure, high reliability, high modularity, and the advantages of convenient and quick installation and debugging. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings.

[0012] Attachment Figure 1 This is a schematic diagram of the main structure of the present invention; Attachment Figure 2 It is a side structural schematic diagram of the present invention; In the figure, 1 is the shell, 2 is the three-position conductor, 3 is the conductor, 4 isolating moving contact, 5 is the upper connecting plate, 6 is the shift fork, 7 is the lower connecting plate, 8 is the maintenance grounding moving contact, 9 is the maintenance grounding static contact, 10 isolating static contact, 11 is the fast grounding static contact, 12 is the fast grounding moving contact, 13 is the crank arm, 14 is the transmission connecting rod, 15 is the fast grounding operating mechanism, 16 is the fast grounding crank arm box, 17 is the static arc contact, 18 is the insulating shaft, 19 is the operating mechanism, and 20 is the strap contact finger. DETAILED DESCRIPTION

[0013] The accompanying drawings illustrate a specific embodiment of the present invention. This embodiment comprises a housing 1, within which are positioned three sets of three-station conductors 2 and 3, each oppositely disposed. An isolating movable contact 4 is mounted on the three-station conductors 2. The isolating movable contact 4 is connected to an upper connecting plate 5, which is hingedly connected to a shift fork 6, which is hingedly connected to a lower connecting plate 7. The lower connecting plate 7 is connected to a maintenance grounding movable contact 8, below which a maintenance grounding static contact 9 is disposed. An isolating static contact 10 is mounted on the conductors 3, along with a fast-acting grounding static contact 11. A fast-acting grounding movable contact 12 is disposed above the fast-acting grounding static contact 11.

[0014] The fast-grounding movable contact 12 is driven by a crank arm 13, which is connected via a transmission link 14. The crank arm 13 is connected to a fast-grounding operating mechanism 15. The crank arm 13 is mounted in a fast-grounding crank arm box 16. A static arcing contact 17 is installed at the end of the isolating static contact 10. The shift fork 6 is connected to the operating mechanism 19 via an insulating shaft 18. A strap contact finger 20 is installed between the maintenance grounding movable contact 8 and the maintenance grounding static contact 9.

[0015] The compact phase-split common gas chamber three-position isolating grounding switch of the present invention is adopted. The motor in the isolating position operating mechanism 19 drives the insulating shaft 18 to rotate. The insulating shaft 18 is connected to the three-position fork 6. The fork 6 drives the upper connecting plate 5 to move. The upper connecting plate 5 is connected to the isolating moving contact 4 by bolts. The isolation mechanism realizes the opening and closing of the isolation position. The static arc contact 17 is configured on the static side, which is conducive to cutting off the current with small inductance and small capacitance. Similarly, the grounding position motor drives the maintenance grounding moving contact 8 to move, thereby realizing the operation of the maintenance grounding switch. The fast grounding switch is integrated into the isolating static contact 10 of the isolating switch, and an independent fast grounding operating mechanism 15 is configured. The maintenance grounding static contact 9 is configured with a strap contact finger 20 that can withstand the large current of the line.

[0016] Rotation of the shift fork drives the isolating movable contact 4, thereby achieving isolation closing and opening operations. Similarly, rotation of the shift fork drives the maintenance grounding movable contact 8, thereby achieving maintenance grounding closing and opening operations. The isolating static contact 10 of the disconnector is integrated with a fast grounding switch, and an independent fast grounding operating mechanism 15 is configured to drive one of the crank arms 13 to rotate. Through the transmission connecting rod 14, all crank arms 13 are driven to rotate synchronously, thereby driving the fast grounding movable contact 12 to insert or leave the fast grounding static contact 11, achieving fast grounding closing and opening.

Claims

1. A compact three-position isolating and grounding switch with a split-phase and common gas chamber, comprising a housing (1), characterized by: Three groups of three-station conductors (2) and conductors (3) are arranged relative to each other in the housing (1); an isolating moving contact (4) is installed on the three-station conductor (2); the isolating moving contact (4) is connected to the upper connecting plate (5); the upper connecting plate (5) is hinged to the shift fork (6); the shift fork (6) is hinged to the lower connecting plate (7); the lower connecting plate (7) is connected to the maintenance grounding moving contact (8); a maintenance grounding static contact (9) is provided below the maintenance grounding moving contact (8); an isolating static contact (10) is installed on the conductor (3); a fast grounding static contact (11) is also installed on the conductor (3); and a fast grounding moving contact (12) is provided above the fast grounding static contact (11).

2. The compact three-position isolating and grounding switch with separate phases and a common gas chamber according to claim 1 is characterized by: The fast grounding movable contact (12) is driven by a crank arm (13), the crank arm (13) is connected via a transmission connecting rod (14), and the crank arm (13) is connected to a fast grounding operating mechanism (15).

3. The compact three-position isolating and grounding switch with separate phases and a common gas chamber according to claim 2 is characterized by: The crank arm (13) is installed in a quick grounding crank arm box (16).

4. The compact three-position isolating and grounding switch with separate phases and a common gas chamber according to claim 1 is characterized by: A static arc contact (17) is provided at the end of the isolating static contact (10).

5. The compact three-position isolating and grounding switch with separate phases and a common gas chamber according to claim 1 is characterized by: The shift fork (6) is connected to the operating mechanism (19) via an insulating shaft (18).

6. The compact three-position isolating and grounding switch with separate phases and a common gas chamber according to claim 1 is characterized by: A watchband contact finger (20) is provided between the maintenance grounding movable contact (8) and the maintenance grounding static contact (9).

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