KR20160047886A - Auxiliary Nozzle of Gas Insulated Switchgear - Google Patents

Auxiliary Nozzle of Gas Insulated Switchgear Download PDF

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Publication number
KR20160047886A
KR20160047886A KR1020140144378A KR20140144378A KR20160047886A KR 20160047886 A KR20160047886 A KR 20160047886A KR 1020140144378 A KR1020140144378 A KR 1020140144378A KR 20140144378 A KR20140144378 A KR 20140144378A KR 20160047886 A KR20160047886 A KR 20160047886A
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KR
South Korea
Prior art keywords
auxiliary nozzle
arc
nozzle
gas
insulated switchgear
Prior art date
Application number
KR1020140144378A
Other languages
Korean (ko)
Inventor
최명
Original Assignee
엘에스산전 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘에스산전 주식회사 filed Critical 엘에스산전 주식회사
Priority to KR1020140144378A priority Critical patent/KR20160047886A/en
Publication of KR20160047886A publication Critical patent/KR20160047886A/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/72—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
    • H01H33/74—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Circuit Breakers (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an auxiliary nozzle of a gas insulated switchgear, and more particularly to an auxiliary nozzle for controlling an arc gas generated when a gas insulated switchgear is interrupted.
A gas insulated switchgear according to one embodiment of the present invention includes a fixed arc contactor; A movable arc contactor which can be selectively contacted or disconnected with the fixed arc contactor; A main nozzle coupled to the cylinder for controlling an arc generated when the stationary arc contactor contacts the movable arc contactor; And an auxiliary nozzle coupled to the movable rod and controlling the arc gas at a rear side of the main nozzle, wherein the auxiliary nozzle includes a plurality of gas discharge holes penetrating from the top to the outer side of the auxiliary nozzle .

Description

(Auxiliary Nozzle of Gas Insulated Switchgear)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an auxiliary nozzle of a gas insulated switchgear, and more particularly to an auxiliary nozzle for controlling an arc gas generated when a gas insulated switchgear is interrupted.

In general, a gas insulated switchgear (Gas Insulated Switchgear) or a gas insulated switchgear (gas insulated switchgear) is installed between the power supply side and the load side of an electric system, and when an abnormal current such as a short circuit or a short circuit occurs on the circuit, It protects power system and load equipment by blocking and is mainly used for high voltage. Therefore, the gas insulated switchgear must maintain the current carrying capacity and insulation performance to operate the rated current and the rated voltage in the steady state, and ensure the breaking performance to prevent the fault current in the abnormal state.

The gas insulated switchgear receives the power from the manipulator connected to the outside to separate the electrodes and mechanically cut off the arc. The arc generated between the contacts of the electrode injects gas such as SF6, . That is, the gas injected to the arc between the contacts absorbs heat from the hot arc, and in this process, the electrical conductivity of the arc is removed, thus blocking the arc.

FIG. 1 shows an internal structure of a conventional gas insulated switchgear. The conventional gas insulated switchgear includes a main contact 1 and a movable contact 2, a fixed arc contact 3 and a movable arc contact 4, a main nozzle 5 and an auxiliary nozzle 6, a cylinder 7 ).

Fig. 2 shows a detailed view of the main nozzle 5 and the auxiliary nozzle 6, and Fig. 3 shows a perspective view of the auxiliary nozzle 6. As shown in Fig. Fig. 4 is an exploded view of the portion to which the auxiliary nozzle of Fig. 3 is applied.

The auxiliary nozzle 6 mainly performs three functions. First, the flow of the arc can be controlled by the shape of the auxiliary nozzle 6. That is, a path through which the arc gas flows is provided. It is also formed of a spar material to assist in generating a pressure gradient in the expansion chamber. Further, it surrounds the outside of the movable arc contactor 4, thereby improving the insulation performance.

However, in the prior art, the arc gas flows only along the path A through the space between the main nozzle 5 and the auxiliary nozzle 6. [ Therefore, there is a weak point that space utilization is insufficient. In addition, there is a weak point that the heat dissipation performance is also low in the cutting process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a gas insulated switchgear having an auxiliary nozzle that smoothly flows an arc and improves exhaust performance.

The auxiliary nozzle of the gas insulated switchgear according to an embodiment of the present invention includes a fixed arc contactor; A movable arc contactor which can be selectively contacted or disconnected with the fixed arc contactor; A main nozzle coupled to the cylinder for controlling an arc generated when the stationary arc contactor contacts the movable arc contactor; And an auxiliary nozzle coupled to the movable rod and controlling the arc gas at a rear side of the main nozzle, wherein the auxiliary nozzle includes a plurality of gas discharge holes penetrating from the top to the outer side of the auxiliary nozzle .

Here, the auxiliary nozzle includes the head, the body, and the leg.

Also, the auxiliary nozzle includes the upper surface, the lower surface, the inner surface, and the outer surface, and the upper surface and the lower surface form an inclined surface in the form of an acid.

Further, the gas discharge hole is formed with a draw-in portion on the upper surface side, and a draw-out portion is formed on the outer surface side.

Further, the lead-out portion is formed to be wider than the lead-in portion.

In addition, each of the gas discharge holes is formed at equal intervals.

Further, each of the gas discharge holes is formed at the same distance from the center axis.

Further, the lead-out portion has an acute angle with the outer surface.

According to the auxiliary nozzle of the gas insulated switchgear according to the embodiment of the present invention, the gas discharge hole through which the arc gas can pass can be formed in the head of the auxiliary nozzle, have.

Such a gas discharge hole has a draw-out portion wider than an inlet portion, so that the flow velocity of the gas is reduced, so that the nozzle can smoothly merge while reducing the generation of vortices when joining the arc flow path between the main nozzle and the auxiliary nozzle .

1 is an internal structural view of a gas insulated switchgear according to the prior art.
2 is a detailed view of the main nozzle and the auxiliary nozzle in Fig.
3 is a perspective view of an auxiliary nozzle applied to a gas insulated switchgear according to the prior art.
Fig. 4 is an exploded view of the portion to which the auxiliary nozzle of Fig. 3 is applied.
5 is an internal structural view of a gas insulated switchgear according to an embodiment of the present invention.
FIG. 6 is a detailed view of the main nozzle and auxiliary nozzle in FIG.
7 is a perspective view of an auxiliary nozzle applied to an auxiliary nozzle of a gas insulated switchgear according to an embodiment of the present invention.
Fig. 8 is an exploded view of a portion to which the auxiliary nozzle of Fig. 7 is applied.
Figure 9 shows a flow graph at the surface of the movable arc contactor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to illustrate the present invention in a manner that allows a person skilled in the art to easily carry out the invention. And does not mean that the technical idea and scope of the invention are limited.

Fig. 5 is an internal structural view of a gas insulated switchgear according to an embodiment of the present invention, Fig. 6 is a detailed view of a main nozzle and an auxiliary nozzle in Fig. 5, Fig. 7 is a cross- Fig. 8 is a perspective view of the gas insulated switchgear to which the auxiliary nozzle of Fig. 7 is applied. Fig. 8 is an exploded perspective view of the auxiliary nozzle applied to the auxiliary nozzle of the apparatus.

The gas insulated switchgear according to each embodiment of the present invention will be described in detail with reference to the drawings.

The gas insulated switchgear according to one embodiment of the present invention includes a fixed arc contactor 15; A movable arc contactor (20) which can be selectively contacted or disconnected with the fixed arc contactor (15); A main nozzle (30) coupled to the cylinder (25) for controlling arc gas generated when the stationary arc contact (15) and the movable arc contact (20) are in contact with each other; And an auxiliary nozzle (40) coupled to the movable rod (35) and controlling an arc from behind the main nozzle (30), wherein the auxiliary nozzle (40) Wherein a plurality of gas discharge holes penetrating through the gas discharge hole are formed in the auxiliary nozzle.

The stationary contact (10) and the stationary arc contact (15) are included in the stationary part. The stationary contactor 10 is formed in a cylindrical shape and forms the outer shape of the stationary portion. The stationary contactor (10) is provided with a stationary contact (11).

The fixed arc contact 15 is formed in a cylindrical shape along the central axis of the stationary contactor 10.

The moving part includes a fixed cylinder 50, a compression cylinder 55, a main nozzle 30, an auxiliary nozzle 40, a movable rod 35, a movable arc contact 20, and the like.

The fixed cylinder 50 is formed in a cylindrical shape to form the external shape of the movable portion.

The compression cylinder (55) is slidably installed in the fixed cylinder (50). The compression cylinder 55 is coupled to the movable rod 35 and moves together with the movable rod 35.

The movable contact 56 is formed at the upper end of the compression cylinder 55 so that it can be contacted or separated from the fixed contact 10 as the compression cylinder 55 moves.

The main nozzle 30 is fixedly coupled to the inside of the upper end of the compression cylinder 55 and moves together as the compression cylinder 55 moves. When the gas insulated switchgear is closed, the main nozzle 30 is inserted into the fixed arc contactor 15, and when the gas insulated switchgear is open, the main nozzle 30 is disconnected from the fixed arc contactor 15 .

The movable rod 35 is inserted through the center axis of the compression cylinder 55 and fixedly coupled to the compression cylinder 55. [ The movable rod 35 moves the compression cylinder 55 by the power transmitted from the operation mechanism (not shown).

The movable arc contact 20 is coupled to the upper end of the movable rod 35 and contacts or separates to the fixed arc contact 15 as the movable rod 35 moves. When the movable arc contact 20 is separated from the fixed arc contact 15, a high-temperature, high-pressure arc is generated.

An auxiliary nozzle (40) is provided between the movable arc contact (20) and the main nozzle (30). The auxiliary nozzle (40) is coupled to the movable rod (35) while surrounding the movable arc contact (20). A 'arc flow path A is formed between the main nozzle 30 and the auxiliary nozzle 40.

The auxiliary nozzle 40 is formed in a substantially circular tube shape and is composed of a head portion 41, a body portion 45, and a leg portion 49.

The inner peripheral surface of the head portion 41 is protruded. The head 41 may have an upper surface 41a and a lower surface 41b formed in an inclined surface so as to form an acid. The inner side surface 41c can be ground by a high-temperature, high-pressure arc generated when the gas insulated switchgear is cut off. It is preferable that the auxiliary nozzle 40 is formed of a material considering such a spar.

The head portion 41 is formed with a gas discharge hole 42 for passing through the upper surface 41a and the outer surface 41d. The gas discharge hole 42 has an inlet portion 42a formed on the upper surface 41a side and a lead portion 42b formed on the outer side surface 41d side. The arc generated during the interruption of the gas insulated switchgear forms an auxiliary arc flow path B which enters the inlet portion 42a and exits through the outlet portion 42b. The arc can exit through the arc flow path (A) and the secondary arc flow path (B), so that it can be discharged more quickly.

Here, the lead portion 42b may be formed wider than the lead-in portion 42a. In this way, the velocity of the gas exiting through the secondary arc flow path (B) is reduced so that it can smoothly merge while reducing the occurrence of vortices when joining the arc flow path (A). The angle formed between the lead portion 42b and the outer surface 41d is an acute angle. As a result, the effect of smoothly joining the arc gas passing through the lead portion 42b with the arc gas flowing along the arc flow path A becomes greater.

The gas discharge holes 42 may be formed in plural. The intervals between the gas discharge holes 42 may be equally spaced. Further, each gas discharge hole 42 may be located at the same distance from the axis center. By positioning at equal distances as described above, it is possible to smoothly flow the gas generated at the time of interruption.

A graph of the mass flow rate at the surface of the movable arc contactor is shown in Fig. Here, the plus, minus (+, -) symbols indicate only directions. It can be seen that the auxiliary nozzle of the gas-insulated switchgear according to the embodiment of the present invention greatly increases the flow rate at the current zero point (here, about 0.02 second) compared with the prior art.

According to the auxiliary nozzle of the gas insulated switchgear according to the embodiment of the present invention, the gas discharge hole through which the arc gas can pass can be formed in the head of the auxiliary nozzle, have.

Such a gas discharge hole has a draw-out portion wider than an inlet portion, so that the flow velocity of the gas is reduced, so that the nozzle can smoothly merge while reducing the generation of vortices when joining the arc flow path between the main nozzle and the auxiliary nozzle .

Such an effect is more effective in a gas insulated switchgear device in which a large amount of current flows.

In the auxiliary nozzle of the gas insulated switchgear according to an embodiment of the present invention, the sparging area and the insulating performance of the auxiliary furnaces are maintained as in the prior art.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope of the present invention. It is obvious that the claims fall within the scope of the claims.

10 Fixed contactor 11 Fixed contact
15 fixed arc contactor 20 movable arc contactor
30 main nozzle 35 movable rod
40 auxiliary nozzle 41 head
41a,
41c inner side surface 41d outer side surface
42 Gas discharge hole 42a Inlet portion
42b Drawer 45 Body portion
49 leg 50 fixed cylinder
55 compression cylinder 56 movable contact
A arc flow path B Auxiliary arc flow path

Claims (8)

Fixed arc contactor;
A movable arc contactor which can be selectively contacted or disconnected with the fixed arc contactor;
A main nozzle coupled to the cylinder for controlling an arc generated when the stationary arc contactor contacts the movable arc contactor;
And an auxiliary nozzle coupled to the movable rod for controlling an arc gas behind the main nozzle,
Wherein a plurality of gas discharge holes are formed in the auxiliary nozzle so as to penetrate from the top surface to the outer side surface of the auxiliary nozzle. The auxiliary nozzle of claim 1, wherein the auxiliary nozzle comprises a head, a body, and a leg. The auxiliary nozzle of claim 1, wherein the auxiliary nozzle comprises an upper surface, a lower surface, an inner surface, and an outer surface, and the upper surface and the lower surface form an inclined surface in the shape of a mountain. The auxiliary nozzle of claim 1, wherein the gas discharge hole is formed with a draw-in portion on the upper surface side and a draw-out portion is formed on the outer side surface. 6. The auxiliary nozzle of claim 5, wherein the lead-out portion is formed wider than the lead-in portion. The auxiliary nozzle of claim 5, wherein each of the gas discharge holes is formed at equal intervals. The auxiliary nozzle of claim 5, wherein each gas discharge hole is formed at the same distance from the center axis. The auxiliary nozzle of claim 5, wherein the lead portion has an acute angle to the outer surface.
KR1020140144378A 2014-10-23 2014-10-23 Auxiliary Nozzle of Gas Insulated Switchgear KR20160047886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140144378A KR20160047886A (en) 2014-10-23 2014-10-23 Auxiliary Nozzle of Gas Insulated Switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140144378A KR20160047886A (en) 2014-10-23 2014-10-23 Auxiliary Nozzle of Gas Insulated Switchgear

Publications (1)

Publication Number Publication Date
KR20160047886A true KR20160047886A (en) 2016-05-03

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Family Applications (1)

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KR1020140144378A KR20160047886A (en) 2014-10-23 2014-10-23 Auxiliary Nozzle of Gas Insulated Switchgear

Country Status (1)

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