CN103683083B - A kind of isolation earthing switch - Google Patents

Abstract

The invention relates to an isolation grounding switch, which belongs to the technical field of high-voltage power transmission. The invention includes metal shell, isolating switch, earthing switch I, earthing switch II, etc., isolating switch includes body insert, disc insulator, static side conductor, isolating switch static contact, rack moving contact rod, gear, moving side conductor , the two grounding switches include disc insulator body inserts, moving side conductors, grounding switch static contacts, grounding switch moving contacts, grounding switch moving contact shields, grounding terminals, grounding shells, and insulating basins; the invention has The structure is simple and compact, and the reliability is high. It can simultaneously realize the safe grounding of the busbars on both sides of the isolating switch fracture, reduce the problem of serious wear and tear of the contacts of the isolating switch and the grounding switch during the opening and closing operations, and the moving contact of the isolating switch. The movement is stable and reliable, and the moving contact of the grounding switch is grounded quickly and conveniently, which is suitable for popularization and application.

Description

An isolating grounding switch

technical field

The invention relates to an isolating grounding switch, in particular to a three-phase common box-type isolating grounding switch for gas-insulated metal-enclosed switchgear, and belongs to the technical field of high-voltage power transmission.

Background technique

The isolating earthing switch is usually used in gas-insulated metal-enclosed switchgear (GIS) or composite electrical (PASS). It is not a separate product and is usually installed before and after the circuit breaker. At present, there are two main types of isolating and grounding switches that are common in the market: one is the traditional three-phase split cylinder structure, and the isolating switch and the grounding switch are separate GIS components. The three-phase split cylinder structure greatly increases the overall size of the GIS, and at the same time the manufacturing cost also increases; the other is that various manufacturers have introduced three-phase common box isolation grounding in recent years. The switch, isolating switch, grounding switch and related components are all installed in a closed metal shell, operated by an electric operating mechanism, which can simultaneously realize the three positions of isolation, closing and grounding, and at the same time realize the isolation switch And the function of grounding switch greatly reduces the volume of GIS and improves the reliability of operation. For example, the Chinese patent No. 200620079035.X discloses a three-position isolating grounding switch, the three-positioning isolating grounding switch includes a static contact of the isolating switch, a disc insulator, a static contact of the grounding switch, a moving contact, Conductor, shielding cover, insulated operating rod, shaft seal, and housing, which are characterized in that a disconnector and a grounding switch are fixed in the same housing, and the two-end movable contact is fixed between the disconnector and the grounding switch. The operating mechanism is connected, and the isolation, closing and grounding of the isolating and grounding switch are controlled by the operating mechanism; the above-mentioned three-position isolating and grounding switch has been fully used in production, but many problems have also occurred during use. Specifically, the above-mentioned three-position isolating and grounding switch cannot be grounded simultaneously on both sides of the isolating switch fracture when the line is overhauled. It is necessary to install an isolating and grounding switch before and after the circuit breaker, which increases the overall size of the high-voltage GIS and increases the manufacturing cost. , and the contact wear is serious during the opening and closing process.

Contents of the invention

The technical problem to be solved by the present invention is to provide an isolating grounding switch with a simple and compact structure, both sides of the isolating switch fracture can be grounded at the same time during line maintenance, and can reduce contact wear and tear, so as to solve the problem of the existing isolating grounding switch with large volume and isolating switch fracture. The problem that both sides cannot be grounded at the same time.

The technical solution of the present invention is: an isolating grounding switch, including three parts: isolating switch, grounding switch I, and grounding switch II, specifically including connecting rod I1, insulating basin I2, desiccant 3, grounding terminal II4, crank arm II5, Connecting rod Ⅱ6, grounding shell Ⅱ7, insulating basin Ⅱ8, earthing switch moving contact Ⅱ9, earthing switch moving contact shield cover Ⅱ10, body insert Ⅰ11, disc insulator Ⅰ12, grounding switch static contact Ⅱ13, static side conductor 14, Isolating switch static contact 15, cover plate 16, rack moving contact rod 17, gear 18, metal shell 19, moving side conductor 20, disc insulator II 21, body insert II 22, grounding switch static contact Ⅰ 23, grounding switch moving Contact Ⅰ24, earthing switch moving contact shield Ⅰ25, grounding terminal Ⅰ26, grounding shell Ⅰ27, transmission shaft Ⅰ28, crank arm Ⅰ29, transmission shaft Ⅱ30, shaft seal Ⅰ31, operating mechanism box Ⅰ32, locking lever Ⅰ33, shaft seal Ⅱ34 , Locking lever Ⅱ35, shaft seal Ⅲ36, locking lever Ⅲ37, operating mechanism box Ⅱ38, inflation nozzle 39, insulating operating lever Ⅰ40, insulating operating lever Ⅱ41, contact seat 42, spring washer 43, metal shielding cover 44, plum blossom Contact finger 45, spring retaining ring 46; disc insulator II 21 is installed in the inner cavity on the left side of metal shell 19, body insert II 22 is installed in disc insulator II 21, and moving side conductor 20 is installed in body insert II 22 through screw connection Above, the grounding switch static contact I23 is installed in the contact seat on the left side of the moving side conductor 20, and the rack moving contact rod 17 and the gear 18 are installed in the contact seat on the right side of the moving side conductor 20, and the rack moving contact rod 17 is The movable contact of the isolating switch, the gear 18 meshes with the rack movable contact rod 17, and drives the rack movable contact rod 17 to contact or separate from the static contact 15 of the isolating switch. The gear 18 is installed on the insulating operating rod I40, The insulating operating lever I40 is installed on the metal casing 19 through the shaft seal III36, and the locking lever III37 is installed on the insulating operating lever I40. The rotation of the insulating operating lever I40 is driven by the transmission mechanism in the operating mechanism box II38, and the operating mechanism The box II38 is installed on the metal casing 19 through screw connection. In addition, the insulating operating lever II41 is installed on the metal casing 19 through the shaft seal II34. The locking lever II35 is installed on the insulating operating lever II41. The insulating operating lever II41 is mainly used for operating The opening and closing operation of other two-phase moving contacts and static contacts of the dynamic isolating switch; the static contact 15 of the isolating switch is installed in the contact seat on the left side of the static side conductor 14, and the contact seat on the right side of the static side conductor 14 is installed with The grounding switch static contact II13 and the static side conductor 14 are installed on the body insert I11 through screw connection, the body insert I11 is installed in the disc insulator I12, and the disc insulator I12 is installed in the inner cavity on the right side of the metal shell 19; The insulating basin Ⅱ 8 is installed on the metal casing 19, the grounding terminal Ⅱ 4 is installed in the insulating basin Ⅱ 8, the grounding casing Ⅱ 7 is installed on the insulating basin Ⅱ 8 through screw connection, the drive shaft Ⅱ 30 is installed on the grounding casing Ⅱ 7 through the bearing, and the shaft seal 31 Connected with operating mechanism box I32 Connected, the operating mechanism box I32 is installed on the grounding shell II7 through screw connection, the locking lever I33 is installed on the transmission shaft II30, one end of the crank arm II5 is installed on the transmission shaft II30, and the other end is connected with the connecting rod II6 through a pin, and grounded The switch moving contact Ⅱ9 is connected with the connecting rod Ⅱ6 through a pin, and installed in the shielding cover Ⅱ10 of the moving contact of the grounding switch. The shielding cover Ⅱ10 of the moving contact of the grounding switch is installed on the grounding terminal Ⅱ4 through screw connection, and the rotation of the transmission shaft Ⅱ30 can be Drive the crank arm Ⅱ5 to rotate, the connecting rod Ⅱ6 moves accordingly, and drive the moving contact Ⅱ9 of the earthing switch to move up and down, so that the moving contact Ⅱ9 of the earthing switch is in contact with or separated from the static contact Ⅱ13 of the earthing switch; the insulating basin Ⅰ2 is installed in the metal shell 19, the ground terminal I26 is installed in the insulating basin I2, the grounding shell I27 is installed on the insulating basin I2 through screw connection, the transmission shaft I28 is installed on the grounding shell I27 through the bearing, and is connected with the operating mechanism box through the shaft seal, and the turning One end of the arm I29 is installed on the transmission shaft I28, the other end is connected with the connecting rod I1 through a pin, the moving contact of the earthing switch I24 is connected with the connecting rod I1 through a pin, and installed in the shielding cover I25 of the moving contact of the earthing switch, the earthing switch The moving contact shield I25 is installed on the grounding terminal I26 through screw connection, the rotation of the transmission shaft I28 can drive the crank arm I29 to rotate, and the connecting rod I1 also moves accordingly, and drives the moving contact I24 of the grounding switch to move up and down, so that the grounding switch moves The contact I24 is in contact with or separated from the grounding switch static contact I23.

The isolating switch includes body insert I11, disc insulator I12, static side conductor 14, isolating switch static contact 15, rack moving contact rod 17, gear 18, moving side conductor 20, disc insulator II21, body insert Ⅱ22; when the disconnector is closed, the main circuit current path is the body insert Ⅰ11, the static side conductor 14, the disconnector static contact 15, the rack moving contact rod 17, the moving side conductor 20, and the body insert Ⅱ22.

The earthing switch I includes a disc insulator II21, a body insert II22, a moving side conductor 20, an earthing switch static contact I23, an earthing switch moving contact I24, an earthing switch moving contact shield I25, a grounding terminal I26, and a grounding shell Ⅰ27, insulating basin Ⅰ2; when the grounding switch Ⅰ is closed and grounded, the grounding path of the main circuit is the body insert Ⅱ22, the moving side conductor 20, the static contact of the grounding switch Ⅰ23, the moving contact of the grounding switch Ⅰ24, the grounding shell Ⅰ27, and the grounding terminal I26.

The grounding switch II includes a body insert I11, a disc insulator I12, a static side conductor 14, a grounding switch static contact II13, a grounding switch moving contact II9, a grounding switch moving contact shield II10, a grounding terminal II4, and an insulating basin Ⅱ8, grounding shell Ⅱ7; when the grounding switch Ⅱ is closed and grounded, the grounding path of the main circuit is the body insert Ⅰ11, the static side conductor 14, the static contact of the grounding switch Ⅱ13, the moving contact of the grounding switch Ⅱ9, the grounding shell Ⅱ7, and the grounding terminal II4.

The grounding switch static contact II13, the isolating switch static contact 15, and the grounding switch static contact I23 all use helical spring contacts, and their respective metal shields are used to shield the static contacts from the impact of the electric field. Influence; the metal shield 44 is installed on the static side conductor 14 by threaded connection, the plum blossom contact finger 45 in the inner cavity of the metal shield 44 is installed on the contact seat 42 by screw connection, and the spring washer 43 and the spring retainer 46 are installed on the The plum blossom touches the finger within 45.

The insulating basin I2, the insulating basin II8, the disc insulator I12, the disc insulator II21, the insulating operating rod I40, and the insulating operating rod II41 are all epoxy resin cast insulators, which play an insulating role in the isolating grounding switch of the present invention .

The locking lever I33, the locking lever II35, and the locking lever III37 are used for closing and locking the isolating grounding switch of the present invention. After the locking, the isolating switch and the grounding switch cannot be closed, so as to prevent safety accidents caused by misoperation.

A desiccant 3 and an inflating nozzle 39 are provided on the metal casing 19, the desiccant 3 is used to dry the insulating gas in the metal casing 19, and the aerating nozzle 39 is used to supply the SF ₆ insulating gas in the metal casing 19; There is a cover plate 16. When the isolating grounding switch of the present invention needs internal maintenance, the cover plate 16 can be disassembled to facilitate maintenance.

Sealing rings are provided on the interfaces between metal shell 19 and insulating basin I2, desiccant 3, insulating basin II8, cover plate 16 and inflation nozzle 39 to prevent leakage of insulating gas.

The working principle of the present invention is:

1: Isolating switch opening, grounding switch I opening, grounding switch II opening working principle: When the isolating grounding switch of the present invention does not conduct current conduction, at this time the isolating switch, grounding switch I, and grounding switch II are in the opening state at the same time. position; the transmission mechanism in the operating mechanism box II38 drives the insulating operating rod I40 to rotate, and the gear 18 installed on the insulating operating rod I40 also rotates, and the gear 18 meshes with the rack moving contact rod 17 and drives the rack The moving contact rod 17 is separated from the static contact 15 of the isolating switch, and at the same time, the transmission mechanism in the operating mechanism box II38 drives the insulating operating rod I41 to rotate, and operates the moving contacts of the other two phases of the isolating switch to separate from the static contacts The transmission mechanism in the operating mechanism box drives the transmission shaft I28 to rotate, the transmission shaft I28 drives the crank arm I29 to rotate, the crank arm I29 drives the connecting rod I1 to move, and the connecting rod I1 drives the grounding switch moving contact I24 to move, and the grounding switch moves The contact I24 is separated from the static contact I23 of the grounding switch; the transmission mechanism in the operating mechanism box I32 drives the transmission shaft II30 to rotate, and drives the crank arm II5 to rotate, the crank arm II5 drives the connecting rod II6 to move, and the connecting rod II6 drives the grounding switch The moving contact II9 moves and separates the moving contact II9 of the earthing switch from the static contact II of the earthing switch.

2: Isolating switch closing, grounding switch I opening, grounding switch II opening working principle: When the isolating grounding switch of the present invention needs to conduct current conduction, only the isolating switch is closed; the transmission mechanism in the operating mechanism box II38 drives the insulating operator When the moving rod I40 rotates, the gear 18 installed on the insulating operating rod I40 also rotates, the gear 18 meshes with the rack moving contact rod 17, and drives the rack moving contact rod 17 to completely contact the isolating switch static contact 15, At the same time, the transmission mechanism in the operating mechanism box II38 drives the insulated operating rod I41 to rotate, and operates the other two phases of the isolating switch to completely contact the moving contact with the static contact; the transmission mechanism in the operating mechanism box drives the transmission shaft I28 to rotate , the transmission shaft I28 drives the crank arm I29 to rotate, the crank arm I29 drives the connecting rod I1 to move, and the connecting rod I1 drives the moving contact I24 of the earthing switch to move, and separates the moving contact I24 of the earthing switch from the static contact I23 of the earthing switch; The transmission mechanism in the moving mechanism box Ⅰ32 drives the transmission shaft Ⅱ30 to rotate, and drives the crank arm Ⅱ5 to rotate, the crank arm Ⅱ5 drives the connecting rod Ⅱ6 to move, and the connecting rod Ⅱ6 drives the moving contact Ⅱ9 of the grounding switch to move, and makes the moving contact Ⅱ9 of the grounding switch It is separated from the static contact II of the earthing switch.

3: Isolating switch opening, grounding switch I closing, grounding switch II closing working principle: When the isolating grounding switch of the present invention needs line maintenance, the grounding switch I and grounding switch II are closed and grounded; the transmission in the operating mechanism box II38 The mechanism drives the insulating operating lever Ⅰ40 to rotate, and the gear 18 installed on the insulating operating lever Ⅰ40 also rotates. The gear 18 meshes with the rack moving contact rod 17, and drives the rack moving contact rod 17 and the static contact of the isolating switch. Phase 15 is separated, and at the same time, the transmission mechanism in the operating mechanism box II38 drives the insulating operating lever I41 to rotate, and operates the other two phases of the isolating switch to separate the moving contacts from the static contacts; the transmission mechanism in the operating mechanism box drives The transmission shaft I28 rotates, the transmission shaft I28 drives the crank arm I29 to rotate, the crank arm I29 drives the connecting rod I1 to move, and the connecting rod I1 drives the moving contact I24 of the earthing switch to move, and makes the moving contact I24 of the earthing switch and the static contact I23 of the earthing switch Complete contact; the transmission mechanism in the operating mechanism box Ⅰ32 drives the transmission shaft Ⅱ30 to rotate, and drives the crank arm Ⅱ5 to rotate, the crank arm Ⅱ5 drives the connecting rod Ⅱ6 to move, and the connecting rod Ⅱ6 drives the moving contact Ⅱ9 of the grounding switch to move, and makes the grounding switch The moving contact II9 is in full contact with the static contact II of the earthing switch.

The beneficial effects of the present invention are:

1: The isolating grounding switch of the present invention uses two grounding switches. When it is necessary to carry out equipment and line maintenance, considering that there may be incoming electricity on both sides of the fracture after the isolating switch is opened, the busbars on both sides of the isolating switch fracture can be realized at the same time. carry out safety grounding;

2: Since the isolating switch and two grounding switches are integrated into one isolating grounding switch, the structure is compact and the volume of the entire GIS is greatly reduced;

3: Since each static contact of the isolating and grounding switch of the present invention adopts a spring contact, the problem of serious wear of the contacts during the opening and closing operations of the isolating switch and the grounding switch can be reduced;

4: Since the movement of the moving contact of the isolating switch is driven by rack and pinion, the stable and reliable movement of the moving contact is guaranteed; the grounding switch adopts the crank arm transmission structure, which is convenient for quick grounding during line maintenance.

Description of drawings

Accompanying drawing 1 is the structural representation of isolating grounding switch of the present invention;

Accompanying drawing 2 is the structure schematic diagram of isolation grounding switch A-A of the present invention;

Accompanying drawing 3 is the structure schematic diagram of the spring contact of isolating grounding switch of the present invention;

In the figure: 1-connecting rod Ⅰ, 2-insulating basin Ⅰ, 3-desiccant, 4-grounding terminal Ⅱ, 5-swing arm Ⅱ, 6 connecting rod Ⅱ, 7-grounding shell Ⅱ, 8-insulating basin Ⅱ, 9 - Earthing switch moving contact II, 10-Earth switch moving contact shield II, 11-Body insert I, 12-Disc insulator I, 13-Earth switch static contact II, 14-Static side conductor, 15- Isolation switch static contact, 16-cover plate, 17-rack moving contact rod, 18-gear, 19-metal shell, 20-moving side conductor, 21-disc insulator Ⅱ, 22-body insert Ⅱ, 23- Grounding switch static contact Ⅰ, 24-grounding switch moving contact Ⅰ, 25-grounding switch moving contact shield Ⅰ, 26-grounding terminal Ⅰ, 27-grounding shell Ⅰ, 28-transmission shaft Ⅰ, 29-knob arm Ⅰ , 30-drive shaft Ⅱ, 31-shaft seal Ⅰ, 32-operating mechanism box Ⅰ, 33-locking lever Ⅰ, 34-shaft seal Ⅱ, 35-locking lever Ⅱ, 36-shaft seal Ⅲ, 37 locking lever Ⅲ, 38-operating mechanism box Ⅱ, 39-inflatable nozzle, 40-insulated operating rod Ⅰ, 41-insulated operating rod Ⅱ, 42-contact seat, 43-spring washer, 44-metal shield, 45-plum blossom contact Refers to, 46-spring retaining ring.

detailed description

The present invention will be further described below in combination with the accompanying drawings and specific embodiments.

Embodiment 1: As shown in Figure 1-3, an isolating grounding switch includes three parts: isolating switch, grounding switch I, and grounding switch II, specifically including connecting rod I1, insulating basin I2, desiccant 3, and grounding terminal II4 , crank arm Ⅱ5, connecting rod Ⅱ6, grounding shell Ⅱ7, insulating basin Ⅱ8, earthing switch moving contact Ⅱ9, earthing switch moving contact shield Ⅱ10, body insert Ⅰ11, disc insulator Ⅰ12, grounding switch static contact Ⅱ13, Static side conductor 14, isolating switch static contact 15, cover plate 16, rack moving contact rod 17, gear 18, metal shell 19, moving side conductor 20, disc insulator II 21, body insert II 22, grounding switch static contact Ⅰ23, moving contact of earthing switch Ⅰ24, shielding cover of moving contact of earthing switch Ⅰ25, grounding terminal Ⅰ26, grounding shell Ⅰ27, transmission shaft Ⅰ28, crank arm Ⅰ29, transmission shaft Ⅱ30, shaft seal Ⅰ31, operating mechanism box Ⅰ32, locking lever Ⅰ33, shaft seal Ⅱ34, locking lever Ⅱ35, shaft sealing Ⅲ36, locking lever Ⅲ37, operating mechanism box Ⅱ38, inflation nozzle 39, insulating operating lever Ⅰ40, insulating operating lever Ⅱ41, contact seat 42, spring washer 43, metal Shielding cover 44, plum blossom contact finger 45, spring retaining ring 46; disc insulator II 21 is installed in the inner cavity on the left side of metal shell 19, body insert II 22 is installed in disc insulator II 21, and moving side conductor 20 is installed in body insert On part II22, the grounding switch static contact I23 is installed in the contact seat on the left side of the moving side conductor 20, and the rack moving contact rod 17 and the gear 18 are installed in the contact seat on the right side of the moving side conductor 20, and the rack moving contact rod 17 is the moving contact of the isolating switch, the gear 18 is meshed with the rack moving contact rod 17, the gear 18 is installed on the insulating operating rod I40, the insulating operating rod I40 is installed on the metal shell 19 through the shaft seal III36, and the locking rod Ⅲ37 is installed on the insulating operating rod I40, the rotation of the insulating operating rod I40 is driven by the transmission mechanism in the operating mechanism box II38, the operating mechanism box II38 is installed on the metal shell 19, and the insulating operating rod II41 passes through the shaft seal II34 Installed on the metal shell 19, the locking lever II35 is installed on the insulating operating lever II41; the static contact 15 of the isolating switch is installed in the contact seat on the left side of the conductor 14 on the static side, and the contact seat on the right side of the conductor 14 on the static side is installed with The grounding switch static contact II13, the static side conductor 14 is installed on the body insert I11, the body insert I11 is installed in the disc insulator I12, and the disc insulator I12 is installed in the inner cavity on the right side of the metal shell 19; the insulating basin II8 Installed on the metal shell 19, the ground terminal II4 is installed in the insulating basin II8, the grounding shell II7 is installed on the insulating basin II8, the transmission shaft II30 is installed on the grounding shell II7 and connected with the operating mechanism box I32 through the shaft seal 31, and the operation The moving mechanism box Ⅰ32 is installed on the grounding shell Ⅱ7, the locking lever Ⅰ33 is installed on the transmission shaft Ⅱ30, one end of the crank arm Ⅱ5 is installed on the transmission shaft Ⅱ30, and the other end is connected to the connecting rod Ⅱ6 through a pin, and the moving contact of the grounding switch Ⅱ9 is connected to the The connecting rod Ⅱ6 is connected and installed on the joint In the ground switch movable contact shield II10, the ground switch movable contact shield II10 is installed on the ground terminal II4; the insulating basin I2 is installed on the metal shell 19, the ground terminal I26 is installed in the insulating basin I2, and the grounding shell I27 is installed on the On the insulating basin I2, the transmission shaft I28 is installed on the grounding shell I27 and connected to the operating mechanism box through the shaft seal. One end of the crank arm I29 is installed on the transmission shaft I28, and the other end is connected to the connecting rod I1. The grounding switch moving contact I24 is connected with connecting rod I1 and installed in the earthing switch moving contact shielding cover I25, and the earthing switch moving contact shielding cover I25 is installed on the grounding terminal I26.

The isolating switch also includes body insert I11, disc insulator I12, static side conductor 14, isolating switch static contact 15, rack moving contact rod 17, gear 18, moving side conductor 20, disc insulator II21, body inlay Part II22; when the disconnector is closed, the path of the main circuit current is the body insert I11, the static side conductor 14, the disconnector static contact 15, the rack moving contact rod 17, the moving side conductor 20, and the body insert II22.

The earthing switch I includes a disc insulator II21, a body insert II22, a moving side conductor 20, an earthing switch static contact I23, an earthing switch moving contact I24, an earthing switch moving contact shield I25, a grounding terminal I26, and a grounding shell Ⅰ27, insulating basin Ⅰ2; when the grounding switch Ⅰ is closed and grounded, the grounding path of the main circuit is the body insert Ⅱ22, the moving side conductor 20, the static contact of the grounding switch Ⅰ23, the moving contact of the grounding switch Ⅰ24, the grounding shell Ⅰ27, and the grounding terminal I26.

The grounding switch II includes a body insert I11, a disc insulator I12, a static side conductor 14, a grounding switch static contact II13, a grounding switch moving contact II9, a grounding switch moving contact shield II10, a grounding terminal II4, and an insulating basin Ⅱ8, grounding shell Ⅱ7; when the grounding switch Ⅱ is closed and grounded, the grounding path of the main circuit is the body insert Ⅰ11, the static side conductor 14, the static contact of the grounding switch Ⅱ13, the moving contact of the grounding switch Ⅱ9, the grounding shell Ⅱ7, and the grounding terminal II4.

The grounding switch static contact II13, the isolating switch static contact 15, and the grounding switch static contact I23 all use helical spring contacts and are respectively equipped with a metal shield 44; the metal shield 44 is installed on the static side conductor 14, and the metal The plum blossom contact finger 45 in the inner cavity of the shielding cover 44 is installed on the contact seat 42 , and the spring washer 43 and the spring retaining ring 46 are installed in the plum blossom contact finger 45 .

The insulating basin I2, the insulating basin II8, the disc insulator I12, the disc insulator II21, the insulating operating rod I40, and the insulating operating rod II41 are all epoxy resin cast insulators.

The metal casing 19 is provided with a desiccant 3 and an air filling nozzle 39 , and a cover plate 16 is installed on the metal casing 19 .

Sealing rings are provided on the interfaces between the metal shell 19 and the insulating basin I2, the desiccant 3, the insulating basin II8, the cover plate 16 and the inflation nozzle 39.

Embodiment 2: As shown in Figure 1-3, an isolating grounding switch includes three parts: isolating switch, grounding switch I, and grounding switch II, specifically including connecting rod I1, insulating basin I2, desiccant 3, and grounding terminal II4 , crank arm Ⅱ5, connecting rod Ⅱ6, grounding shell Ⅱ7, insulating basin Ⅱ8, earthing switch moving contact Ⅱ9, earthing switch moving contact shield Ⅱ10, body insert Ⅰ11, disc insulator Ⅰ12, grounding switch static contact Ⅱ13, Static side conductor 14, isolating switch static contact 15, cover plate 16, rack moving contact rod 17, gear 18, metal shell 19, moving side conductor 20, disc insulator II 21, body insert II 22, grounding switch static contact Ⅰ23, moving contact of earthing switch Ⅰ24, shielding cover of moving contact of earthing switch Ⅰ25, grounding terminal Ⅰ26, grounding shell Ⅰ27, transmission shaft Ⅰ28, crank arm Ⅰ29, transmission shaft Ⅱ30, shaft seal Ⅰ31, operating mechanism box Ⅰ32, locking lever Ⅰ33, shaft seal Ⅱ34, locking lever Ⅱ35, shaft sealing Ⅲ36, locking lever Ⅲ37, operating mechanism box Ⅱ38, inflation nozzle 39, insulating operating lever Ⅰ40, insulating operating lever Ⅱ41, contact seat 42, spring washer 43, metal Shielding cover 44, plum blossom contact finger 45, spring retaining ring 46; disc insulator II 21 is installed in the inner cavity on the left side of metal shell 19, body insert II 22 is installed in disc insulator II 21, and moving side conductor 20 is connected and installed by screws On the body insert II22, the grounding switch static contact I23 is installed in the contact seat on the left side of the moving side conductor 20, and the rack moving contact rod 17 and the gear 18 are installed in the contact seat on the right side of the moving side conductor 20. The moving contact rod 17 is the moving contact of the isolating switch. The gear 18 meshes with the moving contact rod 17 of the rack, and drives the moving contact rod 17 of the rack to contact or separate from the static contact 15 of the isolating switch. On the operating rod I40, the insulating operating rod I40 is installed on the metal casing 19 through the shaft seal III36, the locking rod III37 is installed on the insulating operating rod I40, and the rotation of the insulating operating rod I40 is controlled by the transmission mechanism in the operating mechanism box II38 Drive, the operating mechanism box II38 is installed on the metal casing 19 through screw connection, and the insulating operating lever II41 is installed on the metal casing 19 through the shaft seal II34, the locking lever II35 is installed on the insulating operating lever II41, and the insulating operating lever Ⅱ41 is mainly used to operate the opening and closing operation of other two-phase moving contacts and static contacts of the isolating switch; The grounding switch static contact II13 is installed in the head seat, the static side conductor 14 is installed on the body insert I11 through screw connection, the body insert I11 is installed in the disc insulator I12, and the disc insulator I12 is installed on the right side of the metal shell 19 The inner cavity of the insulating basin Ⅱ8 is installed on the metal casing 19, the grounding terminal Ⅱ4 is installed in the insulating basin Ⅱ8, the grounding casing Ⅱ7 is installed on the insulating basin Ⅱ8 through screw connection, and the transmission shaft Ⅱ30 is installed on the grounding casing Ⅱ7 through bearings. And through the shaft seal 31 and the operating mechanism box I 32 connection, the operating mechanism box I32 is installed on the grounding shell II7 through screw connection, the locking lever I33 is installed on the transmission shaft II30, one end of the crank arm II5 is installed on the transmission shaft II30, and the other end is connected with the connecting rod II6 through a pin, The earthing switch moving contact II9 is connected with the connecting rod II6 through a pin, and installed in the earthing switch moving contact shield II10, the earthing switch moving contact shield II10 is installed on the grounding terminal II4 through screw connection, the rotation of the transmission shaft II30 It can drive the crank arm Ⅱ5 to rotate, and the connecting rod Ⅱ6 moves accordingly, and drives the moving contact Ⅱ9 of the earthing switch to move up and down, so that the moving contact Ⅱ9 of the earthing switch is in contact with or separated from the static contact Ⅱ13 of the earthing switch; the insulating basin Ⅰ2 is installed on the metal On the casing 19, the ground terminal I26 is installed in the insulating basin I2, the grounding casing I27 is installed on the insulating basin I2 through screw connection, the transmission shaft I28 is installed on the grounding casing I27 through the bearing, and is connected with the operating mechanism box through the shaft seal. One end of the crank arm I29 is installed on the transmission shaft I28, the other end is connected with the connecting rod I1 through a pin, the moving contact of the grounding switch I24 is connected with the connecting rod I1 through a pin, and installed in the shielding cover of the moving contact of the grounding switch I25, grounded The switch moving contact shield I25 is installed on the grounding terminal I26 through threaded connection, the rotation of the transmission shaft I28 can drive the crank arm I29 to rotate, the connecting rod I1 also moves accordingly, and drives the grounding switch moving contact I24 to move up and down, so that the grounding switch The moving contact I24 is in contact with or separated from the static contact I23 of the earthing switch.

The isolating switch includes body insert I11, disc insulator I12, static side conductor 14, isolating switch static contact 15, rack moving contact rod 17, gear 18, moving side conductor 20, disc insulator II21, body insert II22; When the isolating switch is closed, the path of the main circuit current is the body insert I11, the static side conductor 14, the isolating switch static contact 15, the rack moving contact rod 17, the moving side conductor 20, and the body insert II22.

Earthing switch I includes disc insulator II21, body insert II22, moving side conductor 20, earthing switch static contact I23, earthing switch moving contact I24, earthing switch moving contact shield I25, grounding terminal I26, grounding shell I27, Insulation basin I2; when the grounding switch I is closed and grounded, the grounding path of the main circuit is the body insert II22, the moving side conductor 20, the static contact of the grounding switch I23, the moving contact of the grounding switch I24, the grounding shell I27, and the grounding terminal I26.

Earthing switch II includes body insert I11, disc insulator I12, static side conductor 14, earthing switch static contact II13, earthing switch moving contact II9, earthing switch moving contact shield II10, grounding terminal II4, insulating basin II8, Grounding shell II7; when the grounding switch II is closed and grounded, the grounding path of the main circuit is the body insert I11, the static side conductor 14, the static contact of the grounding switch II13, the moving contact of the grounding switch II9, the grounding shell II7, and the grounding terminal II4.

The grounding switch static contact Ⅱ13, the isolating switch static contact 15, and the grounding switch static contact Ⅰ23 all adopt spiral spring contacts and install metal shielding covers 44 respectively, and the metal shielding covers 44 are used to shield the static contacts from the influence of the electric field ; The metal shield 44 is installed on the static side conductor 14 by threaded connection, the plum blossom contact finger 45 in the inner cavity of the metal shield 44 is installed on the contact seat 42 by screw connection, and the spring washer 43 and the spring retainer 46 are installed on the plum blossom Touch finger 45 inside.

The insulating basin I2, the insulating basin II8, the disc insulator I12, the disc insulator II21, the insulating operating rod I40, and the insulating operating rod II41 are all epoxy resin cast insulators, which play an insulating role in the isolating grounding switch of the present invention.

Locking lever I33, locking lever II35, and locking lever III37 are used for closing and locking the isolating grounding switch of the present invention. After locking, the isolating switch and the grounding switch cannot be closed to prevent safety accidents caused by misoperation.

A desiccant 3 and an inflating nozzle 39 are provided on the metal casing 19, the desiccant 3 is used to dry the insulating gas in the metal casing 19, and the aerating nozzle 39 is used to supply the SF ₆ insulating gas in the metal casing 19; There is a cover plate 16. When the isolating grounding switch of the present invention needs internal maintenance, the cover plate 16 can be disassembled to facilitate maintenance.

Sealing rings are provided on the interfaces between metal shell 19 and insulating basin I2, desiccant 3, insulating basin II8, cover plate 16 and inflation nozzle 39 to prevent leakage of insulating gas.

The specific implementation of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned implementation, within the knowledge of those of ordinary skill in the art, it can also be made without departing from the gist of the present invention. Variations.

Claims (8)

1. an isolation earthing switch, is characterized in that: comprise isolating switch, earthed switch I, earthed switch II 3 parts, specifically comprise connecting rod I (1), insulating basin I (2), drier (3), earth terminal II (4), connecting lever II (5), connecting rod II (6), grounding shell II (7), insulating basin II (8), moving contact of grounding switch II (9), moving contact of grounding switch radome II (10), body inserts I (11), disk insulator I (12), static contact of grounding switch II (13), quiet side conductor (14), static contact isolation switch (15), cover plate (16), tooth bar movable feeler lever (17), gear (18), metal shell (19), dynamic side conductor (20), disk insulator II (21), body inserts II (22), static contact of grounding switch I (23), moving contact of grounding switch I (24), moving contact of grounding switch radome I (25), earth terminal I (26), grounding shell I (27), power transmission shaft I (28), connecting lever I (29), power transmission shaft II (30), shaft seal I (31), operating mechanism case I (32), deadlock lever I (33), shaft seal II (34), deadlock lever II (35), shaft seal III (36), deadlock lever III (37), operating mechanism case II (38), charging connector (39), insulation actuating bar I (40), insulation actuating bar II (41), contact base (42), spring washer (43), metallic shield (44), plum blossom fingertip (45) and check ring (46), in the inner chamber on metal shell (19) left side, disk insulator II (21) is installed, body inserts II (22) is arranged in disk insulator II (21), dynamic side conductor (20) is arranged on body inserts II (22), in the contact base on dynamic side conductor (20) left side, static contact of grounding switch I (23) is installed, in the contact base on dynamic side conductor (20) the right, tooth bar movable feeler lever (17) and gear (18) are installed, tooth bar movable feeler lever (17) is the moving contact of isolating switch, gear (18) is meshed with tooth bar movable feeler lever (17), gear (18) is arranged on insulation actuating bar I (40), insulation actuating bar I (40) is arranged on metal shell (19) by shaft seal III (36), deadlock lever III (37) is arranged on insulation actuating bar I (40), the rotation of insulation actuating bar I (40) is driven by the transmission mechanism in operating mechanism case II (38), operating mechanism case II (38) is arranged on metal shell (19), insulation actuating bar II (41) is arranged on metal shell (19) by shaft seal II (34), deadlock lever II (35) is arranged on insulation actuating bar II (41), static contact isolation switch (15) is arranged in the contact base on quiet side conductor (14) left side, in the contact base on quiet side conductor (14) the right, static contact of grounding switch II (13) is installed, quiet side conductor (14) is arranged on body inserts I (11), body inserts I (11) is arranged in disk insulator I (12), and disk insulator I (12) is arranged in the inner chamber on metal shell (19) right side, insulating basin II (8) is arranged on metal shell (19), earth terminal II (4) is arranged in insulating basin II (8), grounding shell II (7) is arranged on insulating basin II (8), power transmission shaft II (30) is arranged on grounding shell II (7) and goes up and pass through shaft seal I (31) and be connected with operating mechanism case I (32), operating mechanism case I (32) is arranged on grounding shell II (7), deadlock lever I (33) is arranged on power transmission shaft II (30), one end of connecting lever II (5) is arranged on power transmission shaft II (30), the other end is connected with connecting rod II (6) by pin, moving contact of grounding switch II (9) is connected with connecting rod II (6) and is arranged in moving contact of grounding switch radome II (10), moving contact of grounding switch radome II (10) is arranged on earth terminal II (4), insulating basin I (2) is arranged on metal shell (19), earth terminal I (26) is arranged in insulating basin I (2), grounding shell I (27) is arranged on insulating basin I (2), power transmission shaft I (28) is arranged on grounding shell I (27) and goes up and be connected with operating mechanism case by shaft seal, one end of connecting lever I (29) is arranged on power transmission shaft I (28), the other end is connected with connecting rod I (1), moving contact of grounding switch I (24) is connected with connecting rod I (1) and is arranged in moving contact of grounding switch radome I (25), moving contact of grounding switch radome I (25) is arranged on earth terminal I (26).

2. isolation earthing switch according to claim 1, is characterized in that: described isolating switch comprises body inserts I (11), disk insulator I (12), quiet side conductor (14), static contact isolation switch (15), tooth bar movable feeler lever (17), gear (18), dynamic side conductor (20), disk insulator II (21) and body inserts II (22); When isolating switch closes a floodgate, the path of main circuit current is body inserts I (11), quiet side conductor (14), static contact isolation switch (15), tooth bar movable feeler lever (17), dynamic side conductor (20), body inserts II (22).

3. isolation earthing switch according to claim 1, is characterized in that: described earthed switch I comprises disk insulator II (21), body inserts II (22), dynamic side conductor (20), static contact of grounding switch I (23), moving contact of grounding switch I (24), moving contact of grounding switch radome I (25), earth terminal I (26), grounding shell I (27) and insulating basin I (2); Earthed switch I close a floodgate ground connection time, the grounded circuit of major loop is body inserts II (22), dynamic side conductor (20), static contact of grounding switch I (23), moving contact of grounding switch I (24), grounding shell I (27), earth terminal I (26).

4. isolation earthing switch according to claim 1, is characterized in that: described earthed switch II comprises body inserts I (11), disk insulator I (12), quiet side conductor (14), static contact of grounding switch II (13), moving contact of grounding switch II (9), moving contact of grounding switch radome II (10), earth terminal II (4), insulating basin II (8) and grounding shell II (7); Earthed switch II close a floodgate ground connection time, the grounded circuit of major loop is body inserts I (11), quiet side conductor (14), static contact of grounding switch II (13), moving contact of grounding switch II (9), grounding shell II (7), earth terminal II (4).

5. isolation earthing switch according to claim 1, is characterized in that: described static contact of grounding switch II (13), static contact isolation switch (15), static contact of grounding switch I (23) all adopt helical spring contact and metallic shield (44) is housed separately; Metallic shield (44) is arranged on quiet side conductor (14) and dynamic side conductor (20) respectively, plum blossom fingertip (45) in metallic shield (44) inner chamber is arranged on contact base (42), and spring washer (43) and check ring (46) are arranged in plum blossom fingertip (45).

6. isolation earthing switch according to claim 1, is characterized in that: described insulating basin I (2), insulating basin II (8), disk insulator I (12), disk insulator II (21), insulation actuating bar I (40), insulation actuating bar II (41) are poured with epoxy resin insulating part.

7. isolation earthing switch according to claim 1, is characterized in that: described metal shell (19) is provided with drier (3) and charging connector (39), and metal shell (19) is provided with cover plate (16).

8. isolation earthing switch according to claim 1, is characterized in that: described metal shell (19) and insulating basin I (2), drier (3), insulating basin II (8), cover plate (16) and charging connector (39) interface are everywhere equipped with sealing ring.