CN210378857U

CN210378857U - Quick earthing switch

Info

Publication number: CN210378857U
Application number: CN201921383612.8U
Authority: CN
Inventors: 吴文海; 白春东; 张舒; 张�浩; 李彧; 王占鹏; 高宁
Original assignee: HIGH-PRESSURE SWITCH Co Ltd NHVS GROUP
Current assignee: HIGH-PRESSURE SWITCH Co Ltd NHVS GROUP
Priority date: 2019-08-24
Filing date: 2019-08-24
Publication date: 2020-04-21
Anticipated expiration: 2029-08-24

Abstract

The utility model belongs to the technical field of high tension switchgear transmission equipment, concretely relates to quick earthing switch, operating mechanism are through first output connecting lever, first transmission connecting rod, drive L type second connecting lever motion, through the insulating connecting lever motion of alternate connecting rod simultaneous drive three-phase, make the conducting rod of three-phase insert/extract plum blossom type contact, realize the quick deciliter operation of conducting rod and plum blossom type contact. The shaft of the transmission device converts the movement of the first transmission connecting rod in the vertical direction into the movement of the three-phase conducting rod in the vertical direction. The quincunx contact, the conducting rod, the middle contact, the grounding insulator, the conducting plate and the tank body are communicated, so that the main loop is grounded; the conductive plate is removed and the main loop resistance can be measured through the grounding insulator. The utility model discloses the space is small, compact structure, and reliable and stable, the ability of opening and shutting can reach electromagnetic induction: 400A and 30 kV; electrostatic induction: the 25A and 45kV quick grounding switch completely meets the requirements of future power station development.

Description

Quick earthing switch

Technical Field

The utility model relates to a high tension switchgear transmission equipment technical field, especially a quick earthing switch among 252kV sulfur hexafluoride gas-insulated metal enclosed switchgear.

Background

With the development of high-voltage switch technology, the requirements on the reliability and stability of equipment are higher and higher, the urban power consumption is increased rapidly, a 252kV or even 550kV GIS power station enters a downtown or is close to the suburb, the same-tower double-circuit line design of the power station is about to become a common conventional design, and the high opening and closing capacity of a quick grounding switch in the GIS is urgently needed. The fast grounding switch in the past has small opening and closing capacity and electromagnetic induction: 160A and 15 kV; electrostatic induction: 10A and 15kV can only satisfy a single-tower single-circuit line.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a space is small, compact structure, and reliable and stable, the ability of opening and shutting can reach electromagnetic induction: 400A and 30 kV; electrostatic induction: the 25A and 45kV quick grounding switch completely meets the requirements of future power station development.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a fast grounding switch is of a three-phase box-splitting structure, an operating mechanism (1) is arranged in front of a middle phase, an output shaft behind the operating mechanism (1) is fixedly connected with one end of a first output crank arm (2), the other end of the first output crank arm (2) is fixedly connected with a first transmission connecting rod (4) through a first shaft pin (3), the first transmission connecting rod (4) is parallel to a middle phase tank body, and the other end of the first transmission connecting rod (4) is fixedly connected with one end of an L-shaped second crank arm (6) on the middle phase through a second shaft pin (5); the inflection point of the L-shaped second crank arm (6) is fixedly connected with a shaft I (13) on the transmission device (12), and the other end of the L-shaped second crank arm (6) is fixedly connected with the middle position of the interphase connecting rod (8) through a third shaft pin (7); one end of an insulating crank arm (14) of the intermediate phase is fixed with the shaft I (13), and the other end of the insulating crank arm (14) is movably connected with a fifth shaft pin (15-1) on the conducting rod (15) through a waist-shaped hole (14-1); two ends of an alternate connecting rod (8) are fixedly connected with one end of a linear third crank arm (11) at two sides through a fourth shaft pin (10), the other end of the third crank arm (11) is fixedly connected with a shaft II (9) at two sides, one end of an insulating crank arm (14) at two sides is fixed with the shaft II (9), and the other end of the insulating crank arm (14) is movably connected with a fifth shaft pin (15-1) on a conductive rod (15) through a kidney-shaped hole (14-1); the corresponding positions of the conductor (19) in the three-phase tank body and each phase conducting rod (15) are provided with quincunx fixed contacts (20).

In the quick grounding switch, the conducting rod (15) is connected with the grounding insulator (17) through the middle contact (16), and the grounding insulator (17) is connected with the tank body through the conducting plate (18);

in the quick grounding switch, the second crank arm (6) of the middle phase is respectively parallel to the third crank arms (11) of the two side phases; the insulating crank arm (14) of the middle phase is parallel to the insulating crank arms (14) of the two side phases.

The utility model has the advantages that: compared with the existing design in the past, the utility model has compact integral structure, simple and reliable transmission link, effective space saving, and convenient operation of in-plant installation and debugging, transportation, on-site installation and debugging, maintenance and the like of the equipment; the three-phase conducting rods are connected through the interphase connecting rod and the connecting lever, so that mechanical linkage is realized, and the synchronism of three phases during opening and closing operations is more effectively ensured; the conductor structure is optimized to obtain excellent fracture insulation performance, so that the high opening and closing performance is achieved; the 252kV quick grounding switch of the utility model passes the test verification, the test result completely meets the expected opening and closing performance (electromagnetic induction: 400A, 30 kV; electrostatic induction: 25A, 45kV), and is applied to the engineering. The design fully embodies the idea of humanized design, and has the advantages of small volume, compact structure, convenience in installation, debugging, transportation, maintenance and repair, high reliability and the like.

Drawings

Figure 1 is a side view of the mesophase of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is the connection relationship between the insulating crank arm and the conducting rod of the present invention.

The meaning of the reference symbols in the figures: 1. an operating mechanism; 2. a first output crank arm; 3. a first shaft pin; 4. a first drive link; 5. a second shaft pin; 6. a second crank arm; 7. a third shaft pin; 8. connecting rods are arranged among the phases; 9. a shaft II; 10. a fourth shaft pin; 11. a third crank arm; 12. a transmission device; 13. a shaft I; 14. an insulating crank arm; 14-1 kidney shaped hole; 15. a conductive rod; 15-1 fifth pivot pin; 16. an intermediate contact; 17. a grounding insulator; 18. a conductive plate; 19. a conductor; 20. quincunx fixed contacts.

Detailed Description

The following is a detailed description of the present invention, but is not intended to limit the invention in any way.

A fast grounding switch as shown in fig. 1-3. The quick grounding switch is of a three-phase box separating structure, an operating mechanism 1 is arranged in front of a middle phase, an output shaft behind the operating mechanism 1 is fixedly connected with one end of a first output crank arm 2, the other end of the first output crank arm 2 is fixedly connected with a first transmission connecting rod 4 through a first shaft pin 3, the first transmission connecting rod 4 is parallel to a middle phase tank body, and the other end of the first transmission connecting rod 4 is fixedly connected with one end of an L-shaped second crank arm 6 on the middle phase through a second shaft pin 5; the inflection point of the L-shaped second crank arm 6 is fixedly connected with a shaft I13 on the transmission device 12, and the other end of the L-shaped second crank arm 6 is fixedly connected with the middle position of the interphase connecting rod 8 through a third shaft pin 7; one end of an insulating crank arm 14 of the intermediate phase is fixed with the shaft I13, and the other end of the insulating crank arm 14 is movably connected with a fifth shaft pin 15-1 on the conducting rod 15 through a kidney-shaped hole 14-1; two ends of the alternate connecting rod 8 are fixedly connected with one end of a linear third crank arm 11 of two side phases through a fourth shaft pin 10 respectively, the other end of the third crank arm 11 is fixedly connected with a shaft II 9 of the two side phases, one end of an insulating crank arm 14 of the two side phases is fixed with the shaft II 9, and the other end of the insulating crank arm 14 is movably connected with a fifth shaft pin 15-1 on the conducting rod 15 through a kidney-shaped hole 14-1; the conductors 19 in the three-phase tank body are provided with plum blossom type static contacts 20 at the corresponding positions of the conducting rods 15 of each phase.

In the fast grounding switch, the conducting rod 15 is connected with the grounding insulator 17 through the middle contact 16, and the grounding insulator 17 is connected with the tank body through the conducting plate 18;

in the fast grounding switch, the second crank arm 6 of the middle phase is respectively parallel to the third crank arms 11 of the two side phases; the insulated crank arms 14 of the middle phase are parallel to the insulated crank arms 14 of the two side phases.

The working process of the utility model is as follows:

and starting the operating mechanism 1 before the intermediate phase, wherein the operating mechanism 1 drives the L-shaped second crank arm 6 to move through the first output crank arm 2, the first transmission connecting rod 4 and the interphase connecting rod 8, and simultaneously drives the three-phase insulating crank arm 14 to move, so that the three-phase conducting rods 15 are inserted into/pulled out of the quincunx contacts 20, and the quick opening and closing operation of the conducting rods 15 and the quincunx contacts 20 is realized. The shaft of the transmission device 12 converts the movement of the first transmission link 4 in the vertical direction into a movement of the three-phase conductor bar 15 in the vertical direction. The quincunx contact 20, the conducting rod 15, the middle contact 16, the grounding insulator 17, the conducting plate 18 are communicated with the tank body, so that the main loop is grounded; the conductive plate 18 is removed and the main loop resistance can be measured through the grounding insulator 17.

Claims

1. A fast grounding switch is characterized in that the fast grounding switch is of a three-phase box-separating structure, an operating mechanism (1) is arranged in front of a middle phase, an output shaft behind the operating mechanism (1) is fixedly connected with one end of a first output connecting lever (2), the other end of the first output connecting lever (2) is fixedly connected with a first transmission connecting rod (4) through a first shaft pin (3), the first transmission connecting rod (4) is parallel to a middle phase tank body, and the other end of the first transmission connecting rod (4) is fixedly connected with one end of an L-shaped second connecting lever (6) on the middle phase through a second shaft pin (5); the inflection point of the L-shaped second crank arm (6) is fixedly connected with a shaft I (13) on the transmission device (12), and the other end of the L-shaped second crank arm (6) is fixedly connected with the middle position of the interphase connecting rod (8) through a third shaft pin (7); one end of an insulating crank arm (14) of the intermediate phase is fixed with the shaft I (13), and the other end of the insulating crank arm (14) of the intermediate phase is movably connected with a fifth shaft pin (15-1) on the conducting rod (15) through a waist-shaped hole (14-1); two ends of an alternate connecting rod (8) are fixedly connected with one end of a linear third crank arm (11) at two sides through a fourth shaft pin (10), the other end of the third crank arm (11) is fixedly connected with a shaft II (9) at two sides, one end of an insulating crank arm (14) at two sides is fixed with the shaft II (9), and the other end of the insulating crank arm (14) at two sides is movably connected with a fifth shaft pin (15-1) on a conducting rod (15) through a kidney-shaped hole (14-1); the corresponding positions of the conductor (19) in the three-phase tank body and each phase conducting rod (15) are provided with quincunx fixed contacts (20).

2. A fast earthing switch according to claim 1, characterized in that the conducting rod (15) is connected to an earthing insulator (17) via an intermediate contact (16), the earthing insulator (17) being connected to the tank via a conducting plate (18).

3. A fast earthing switch according to claim 1, characterized in that the second crank arm (6) of the middle phase is parallel to the third crank arms (11) of the two side phases, respectively; the insulating crank arm (14) of the middle phase is parallel to the insulating crank arms (14) of the two side phases.