CN111477495A - Isolation integrated switch of air insulation circuit breaker - Google Patents

Abstract

The invention provides an isolation integrated switch of an air insulation circuit breaker, and belongs to the technical field of circuit breaker isolation switches. The invention comprises an insulating fixed supporting plate, three vacuum arc-extinguishing chambers are arranged in the middle of the insulating fixed supporting plate side by side, a bus wiring terminal is arranged on a movable conducting rod of the vacuum arc extinguish chamber, the movable conducting rod is connected with a vacuum tube pull rod through a butterfly-shaped buffer component, the vacuum tube pull rod is connected with a transmission shaft of a breaker switch for driving the vacuum tube pull rod to act, the lower part of the insulating fixed supporting plate is provided with three isolating switches corresponding to the vacuum arc-extinguishing chambers side by side, the vacuum arc-extinguishing device has simple structure, realizes that air is used as a junction edge medium, adopts a vacuum arc-extinguishing technology for arc extinguishing, replaces the insulation and arc extinguishing by special gas, does not need to be arranged in a sealed environment, the maintenance is convenient, and the butterfly buffer assembly is arranged, so that the buffer effect can be realized when the contacts of the vacuum arc extinguish chamber are combined, and the vacuum arc extinguish chamber can be well protected.

Description

Isolation integrated switch of air insulation circuit breaker

Technical Field

The invention belongs to the technical field of circuit breaker isolating switches, and particularly relates to an isolating integrated switch of an air insulation circuit breaker.

Background

In order to meet the requirements, various switch cabinets are continuously emerged. And the significant technical breakthrough is mainly derived from the application of SF6 gas insulation technology to electrical equipment more than twenty years ago. The SF6 has excellent insulating property and cooling arc characteristic, greatly reduces the size of electrical equipment in the application of the electrical equipment, and improves the reliability of equipment insulation, so the SF6 insulated switch cabinet is widely applied to the electric power market. Although SF6 gas insulated switchgear has many excellent properties, since SF6 gas is identified as a greenhouse gas, SF6 is decomposed to form toxic sulfur subfluorides during arc discharge, and third its sealed gas tank is operated under pressure, sealing requirements are high, processing is difficult, accidents are easily caused once leakage occurs, and some circuit breakers using vacuum interrupters lack a protection device and are easily damaged.

Disclosure of Invention

In order to comprehensively solve the problems, particularly the defects in the prior art, the invention provides an isolation integrated switch of an air insulation circuit breaker.

The invention adopts the following technical means: an air insulation circuit breaker isolation integrated switch comprises an insulation fixed supporting plate, wherein three vacuum arc extinguish chambers are arranged in the middle of the insulation fixed supporting plate side by side, a bus wiring end is arranged on a movable conducting rod of each vacuum arc extinguish chamber, the movable conducting rod is connected with a vacuum tube pull rod used for operating the contact combination or disconnection of each vacuum arc extinguish chamber through a butterfly-shaped buffer assembly capable of playing a buffer role, the vacuum tube pull rod is connected with a circuit breaker transmission shaft used for driving the vacuum arc extinguish chambers to move, three isolation switches corresponding to the vacuum arc extinguish chambers are arranged in the lower portion of the insulation fixed supporting plate side by side, each isolation switch comprises an isolation knife switch contact connected with a wire inlet column at the lower end of each vacuum arc extinguish chamber, an isolation knife switch corresponding to the isolation knife switch contact and an isolation switch transmission shaft used for driving the isolation knife switch to move, and a bus traveling, and the bottom of the insulating fixed supporting plate is provided with an isolating switch grounding contact and a switch outgoing line contact seat which correspond to the bus carrying column.

The isolating switch grounding contact is installed on the insulating fixed supporting plate, the upper end of the bus travelling column penetrates through a through hole in the middle of the isolating switch grounding contact to be hinged to the bottom of the isolating disconnecting link contact, and the switch outgoing line contact seat is sleeved at the upper end of the bus travelling column and used for connecting the bus travelling column and the isolating switch grounding contact.

The butterfly buffer assembly comprises a buffer shell, the lower portion of the vacuum tube pull rod and the upper portion of the movable conductive rod stretch into the buffer shell, the upper end portion of the movable conductive rod is provided with a piston groove, the lower portion of the vacuum tube pull rod is provided with a piston portion corresponding to the piston groove, a protruding block is formed at the end portion of the piston portion, a baffle plate corresponding to the piston portion and used for blocking the protruding block is formed at the end portion of the piston groove, a buffer spring sleeved outside the vacuum tube pull rod is arranged on the upper portion of the baffle plate, the buffer shell is fixed with the vacuum tube pull rod, a containing groove corresponding to the buffer spring and the movable conductive rod is formed in the buffer shell, and the buffer shell and the vacuum tube pull rod can move up and down along the movable conductive rod.

Furthermore, the buffer shell is made of rubber materials, and the buffer spring is a tetrafluoro spring tube.

The invention has the beneficial effects that: the three-phase vacuum arc extinguishing chamber is simple in structure, the three phases of the switch adopt independent phase sequences, the single-phase switch is fixed by the insulating fixed supporting plate, the phases are isolated by the environment-friendly insulating partition plate, the phase creepage distance of the switch is increased, the influence of single-phase faults on the performance of the whole switch is avoided, the air is used as a joint edge medium, the arc extinguishing technology is adopted for arc extinguishing, the insulation and arc extinguishing by special gas are replaced, the switch does not need to be installed in a sealed environment, the later maintenance is convenient, the butterfly-shaped buffer assembly is arranged, the buffer effect can be achieved when the contacts of the vacuum arc extinguishing chamber are combined, the contacts can be assisted to be quickly disconnected when the contacts are disconnected.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic left side view of the present invention;

FIG. 3 is a schematic diagram of the right-hand side view of the present invention;

FIG. 4 is a schematic view of the overall structure of the present invention;

FIG. 5 is a schematic view of the connection structure of the butterfly damper assembly of the present invention;

fig. 6 is a partially enlarged schematic view of fig. 5.

Detailed Description

The technical scheme of the invention is clearly and completely described in the following with reference to the accompanying drawings.

As shown in fig. 1 to 6, this embodiment provides an air insulated circuit breaker isolation integrated switch, which includes an insulating fixed support plate 6, three vacuum arc-extinguishing chambers 5 are arranged in parallel in the middle of the insulating fixed support plate 6, a bus terminal 4 is arranged on a movable conducting rod 501 of the vacuum arc-extinguishing chambers 5, the movable conducting rod 501 is connected to a vacuum tube pull rod 2 for operating the connection or disconnection of a contact 502 of the vacuum arc-extinguishing chambers 5 through a butterfly buffer component 3 capable of playing a buffer role, the contact 502 includes a movable contact connected to the movable conducting rod 501 at the upper part and a fixed contact connected to a lower wire inlet column, the vacuum tube pull rod 2 is connected to a circuit breaker transmission shaft 1 for driving the vacuum tube pull rod to move, three isolation switches corresponding to the vacuum arc-extinguishing chambers 5 are arranged in parallel in the lower part of the insulating fixed support plate 6, and the isolation switches include an isolation knife switch contact 9 connected to the wire inlet, The isolation switch comprises an isolation switch 7 corresponding to an isolation switch contact 9 and an isolation switch transmission shaft 8 used for driving the isolation switch 7 to act, wherein the bottom of the isolation switch contact 9 is correspondingly connected with a bus line advancing column 901, and the bottom of the insulation fixed supporting plate 6 is provided with an isolation switch grounding contact 10 and a switch outgoing line contact seat 11 corresponding to the bus line advancing column 901.

The isolating switch grounding contact 10 is installed on the insulating fixed supporting plate 6, the upper end of the bus bar advancing column 901 penetrates through a through hole 1001 in the middle of the isolating switch grounding contact 10 to be hinged with the bottom of the isolating disconnecting link contact 9, and the switch outgoing line contact seat 11 is sleeved at the upper end of the bus bar advancing column 901 and used for connecting the bus bar advancing column 901 with the isolating switch grounding contact 10.

The butterfly buffer assembly 3 comprises a buffer shell 301, the lower portion of the vacuum tube pull rod 2 and the upper portion of the movable conductive rod 501 extend into the buffer shell 301, the upper end portion of the movable conductive rod 501 is provided with a piston groove 504, the lower portion of the vacuum tube pull rod 2 is provided with a piston portion 201 corresponding to the piston groove 504, a bump 202 is formed at the end portion of the piston portion 201, a baffle 505 corresponding to the piston portion 201 and used for blocking the bump 202 is formed at the end portion of the piston groove 504, a buffer spring 203 sleeved outside the vacuum tube pull rod 2 is arranged on the upper portion of the baffle 505, the buffer shell 301 is fixed with the vacuum tube pull rod 2, a containing groove 204 corresponding to the buffer spring 203 and the movable conductive rod 501 is formed in the buffer shell 301, and the vacuum tube pull rod 2 can move up and down along the movable conductive rod 501.

Buffer housing 301 adopts the preparation of rubber material, buffer spring 203 is the tetrafluoro spring pipe.

The concrete during operation: the known existing energy storage operating mechanism is connected with a transmission shaft of a circuit breaker switch through an external configuration, the operating mechanism drives the transmission shaft to rotate through energy release after energy storage, the transmission shaft drives a vacuum arc extinguish chamber to act through a vacuum tube pull rod when rotating, so that the circuit breaker switch is switched on and off, the butterfly-shaped buffer assembly is arranged, the buffer effect can be achieved when contacts of the vacuum arc extinguish chamber are combined, the contacts can be assisted to be quickly disconnected when being disconnected, and the vacuum arc extinguish chamber can be well protected. The bus wiring end is drawn forth through copper foil flexible connecting line in vacuum interrupter upper end, realize switch outlet port, three station isolator are installed to the vacuum interrupter lower extreme, the isolator action relies on the known special three station operating device of current isolator of outside configuration to drive the transmission shaft rotatory, realize the isolator divide-shut brake, the switch three-phase adopts independent phase sequence, single-phase switch adopts insulating fixed bolster fixed, the interphase adopts environment-friendly insulating barrier to keep apart, increase the alternate creep distance of switch, avoid single-phase trouble to influence whole platform switching performance that appears, realized being the joint edge medium by the air, the arc extinguishing adopts vacuum arc extinguishing technique, replace to rely on special gas to insulate and the arc extinguishing, the switch need not install in sealed environment, the later maintenance is convenient, excellent in use effect.

The present invention is illustrated by way of example and not by way of limitation. It will be apparent to those skilled in the art that other variations and modifications may be made in the foregoing disclosure without departing from the spirit or essential characteristics of all embodiments, and that all changes and modifications apparent from the above teachings are within the scope of the invention.

Claims (4)

1. The utility model provides an air insulation breaker isolation integral type switch, a serial communication port, including insulating fixed support board (6), the middle part of insulating fixed support board (6) is provided with three vacuum interrupter (5) side by side, be provided with bus-bar wiring end (4) on moving conducting rod (501) of vacuum interrupter (5), it is connected with vacuum tube pull rod (2) that contact (502) that are used for operating vacuum interrupter (5) combine or break off through butterfly buffer assembly (3) that can play the cushioning effect to move conducting rod (501), vacuum tube pull rod (2) are connected with circuit breaker switch transmission shaft (1) that is used for driving its action, the lower part of insulating fixed support board (6) is provided with the isolator that three correspond with vacuum interrupter (5) side by side, isolator includes isolation knife brake contact (9) of being connected with inlet wire post (503) of vacuum interrupter (5) lower extreme, The isolation switch comprises an isolation switch (7) corresponding to an isolation switch contact (9) and an isolation switch transmission shaft (8) used for driving the isolation switch (7) to act, wherein the bottom of the isolation switch contact (9) is correspondingly connected with a bus line advancing column (901), and the bottom of an insulation fixed supporting plate (6) is provided with an isolation switch grounding contact (10) and a switch outgoing line contact seat (11) corresponding to the bus line advancing column (901).

2. The air insulated circuit breaker isolation integrated switch of claim 1, wherein the isolation switch grounding contact (10) is installed on the insulation fixed support plate (6), the upper end of the bus bar advancing column (901) penetrates through a through hole (1001) in the middle of the isolation switch grounding contact (10) to be hinged with the bottom of the isolation disconnecting link contact (9), and the switch outgoing line contact seat (11) is sleeved at the upper end of the bus bar advancing column (901) and used for connecting the bus bar advancing column (901) with the isolation switch grounding contact (10).

3. The air insulated circuit breaker isolation integrated switch according to claim 2, wherein the butterfly-shaped buffer assembly (3) comprises a buffer housing (301), the lower portion of the vacuum tube pull rod (2) and the upper portion of the movable conducting rod (501) extend into the buffer housing (301), the upper end of the movable conducting rod (501) is provided with a piston groove (504), the lower portion of the vacuum tube pull rod (2) is provided with a piston portion (201) corresponding to the piston groove (504), the end of the piston portion (201) is provided with a bump (202), the end of the piston groove (504) is provided with a baffle (505) corresponding to the piston portion (201) and used for blocking the bump (202), the upper portion of the baffle (505) is provided with a buffer spring (203) sleeved outside the vacuum tube pull rod (2), and the buffer housing (301) is fixed with the vacuum tube pull rod (2), the buffer shell (301) is internally provided with a containing groove (204) corresponding to the buffer spring (203) and the movable conducting rod (501), and the buffer shell (301) and the vacuum tube pull rod (2) can move up and down along the movable conducting rod (501).

4. The switch of claim 3, wherein the buffer housing (301) is made of rubber, and the buffer spring (203) is a Teflon spring tube.

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