KR20160003827U - Extinguishing Unit of Gas Insulated Switchgear - Google Patents

Extinguishing Unit of Gas Insulated Switchgear Download PDF

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Publication number
KR20160003827U
KR20160003827U KR2020150002726U KR20150002726U KR20160003827U KR 20160003827 U KR20160003827 U KR 20160003827U KR 2020150002726 U KR2020150002726 U KR 2020150002726U KR 20150002726 U KR20150002726 U KR 20150002726U KR 20160003827 U KR20160003827 U KR 20160003827U
Authority
KR
South Korea
Prior art keywords
gas
nozzle
cylinder rod
insulated switchgear
movable
Prior art date
Application number
KR2020150002726U
Other languages
Korean (ko)
Inventor
이태영
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 KR2020150002726U priority Critical patent/KR20160003827U/en
Publication of KR20160003827U publication Critical patent/KR20160003827U/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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/20—Bridging contacts
    • 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
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/20—Means for extinguishing or preventing arc between current-carrying parts using arcing horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H01H9/341—Barrier plates carrying electrodes

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soot portion of a gas insulated switchgear, and more particularly, to a soffit portion of a gas insulated switchgear for facilitating external discharge of a hot gas during a cutoff.
The soot portion of the gas insulated switchgear according to one embodiment of the present invention includes a stationary-side arc contactor; A cylinder rod that is linearly moved by receiving power from a driving unit; A movable-side arc contact which is provided on the cylinder rod and can be brought into contact with or separated from the fixed-side arc contactor; A main nozzle coupled to the movable cylinder for controlling an arc generated when the stationary-side arc contactor and the movable-side arc contactor are separated; An auxiliary nozzle coupled to the cylinder rod to control an arc gas behind the main nozzle; And a choke nozzle formed of a circular tube having a neck on an inner peripheral surface thereof and coupled to an inlet of the cylinder rod to control an arc flow generated in the auxiliary nozzle, wherein a plurality of gas holes are formed in the choke nozzle, And heat and arc generated inside the cylinder rod can be introduced into the cylinder rod.

Description

[0001] The present invention relates to a gas insulated switchgear,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soot portion of a gas insulated switchgear, and more particularly, to a soffit portion of a gas insulated switchgear for facilitating external discharge of a hot gas during a cutoff.

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.

1 and 2 show an internal structure of a conventional gas insulated switchgear. Fig. 1 shows a state of energization, and Fig. 2 shows a state of being disconnected. The state immediately after the movable-side arc contactor is separated from the stationary-side arc contactor is shown. A choke nozzle is shown in Fig. The conventional gas insulated switchgear includes a movable cylinder 1 and a cylinder rod 2, fixed side arc contact 3 and movable side arc contact 4, main nozzle 5 and auxiliary nozzle 6, And a choke nozzle (7).

When the fault current is generated, the movable portion is retracted and separated from the fixed portion by receiving the power of the driving portion (not shown) and moving the cylinder rod 2 backward. At this time, an arc is generated while the movable-side arc contact 4 is disconnected from the stationary-side arc contact 3, and hot gas of high temperature and high pressure is generated by this arc. The hot gas of high temperature and high pressure generated in the auxiliary nozzle 6 enters into the movable arc contactor 4 through a groove (not shown) formed on the inlet and wall surface of the movable arc contactor 4, And then flows into the cylinder rod 2 through the nozzle 7 and is discharged to the outside.

However, in the gas insulated switchgear according to the related art, since the four movable arc contact 4 and the choke nozzle 7 of the auxiliary nozzle 6 are located, the vacant space is narrow, The auxiliary nozzle 6 expands due to the internal pressure. Accordingly, there is a problem that the auxiliary nozzle 6 may be damaged when the pressure due to the heat gas is high or the interruption frequently occurs.

The object of the present invention is to solve the above-mentioned problems, and it is an object of the present invention to provide a gas-insulated switchgear of a gas-insulated switchgear, in which a flow path through which a thermal gas formed inside an auxiliary nozzle can flow through a choke nozzle, Quot;

The soot portion of the gas insulated switchgear according to one embodiment of the present invention includes a stationary-side arc contactor; A cylinder rod coupled to the center of the shaft of the movable cylinder and linearly moving under the power of the driving unit; A movable-side arc contact which is provided on the cylinder rod and can be brought into contact with or separated from the fixed-side arc contactor; A main nozzle coupled to the movable cylinder for controlling thermal gas caused by an arc generated when the stationary-side arc contactor and the movable-side arc contactor are separated; And an auxiliary nozzle coupled to the cylinder rod for controlling an arc of heat gas behind the main nozzle; And a choke nozzle coupled to an inlet of the cylinder rod for controlling a flow of a thermal gas by an arc, wherein a plurality of gas holes are formed in the choke nozzle, Through the hole and into the inside of the cylinder rod.

Here, the gas holes are formed in plural along the longitudinal direction of the choke nozzle.

Further, the gas holes are arranged in a plurality of rows along the circumferential direction of the choke nozzle.

Further, the gas holes are formed at positions corresponding to the split grooves formed along the longitudinal direction in the movable-side arc contactor.

Further, the gas holes are formed in an oblique direction converging toward the cylinder rod.

Further, the gas hole is characterized in that the inlet portion of the outer circumferential surface is formed wider than the outlet portion of the inner circumferential surface.

Further, the gas holes are formed as long holes along the longitudinal direction of the choke nozzle.

According to an embodiment of the present invention, a gas hole is formed in the choke nozzle so that the thermal gas generated in the auxiliary nozzle during the shutoff can flow into the cylinder rod through the gas hole . As a result, there is an effect that the hot gas generated inside the auxiliary nozzle by the arc at the time of interruption is rapidly discharged into the cylinder rod. As described above, the hot gas generated in the auxiliary nozzle is rapidly discharged to the outside through the inside of the cylinder, thereby preventing expansion and breakage of the auxiliary nozzle.

1 is a cross-sectional view of a gas insulated switchgear according to the prior art. It is in the energized state.
2 is a cross-sectional view of a conventional gas insulated switchgear. It is a blocking state.
3 is a perspective view of a choke nozzle applied to a gas insulated switchgear according to the prior art.
4 is a cross-sectional view of a gas insulated switchgear according to one embodiment of the present invention. It is in the energized state.
5 is a cross-sectional view of a gas insulated switchgear according to one embodiment of the present invention. It is a blocking state.
6 is a perspective view of a choke nozzle applied to a gas insulated switchgear according to an embodiment of the present invention.
7 is a perspective view of a movable-side arc contactor applied to a gas-insulated switchgear according to an embodiment of the present invention.
8, 9, and 10 are perspective views of a choke nozzle applied to a gas insulated switchgear according to another embodiment of the present invention.

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 such a manner that a person skilled in the art can easily carry out the present invention. And does not mean that the technical idea and category of the design is limited.

4 and 5 are sectional views of a gas insulated switchgear according to an embodiment of the present invention. Fig. 4 shows a state of energization, and Fig. 5 shows a state immediately after the movable-side arc contactor is separated from the stationary-side arc contactor, indicating a state of being disconnected. FIGS. 6 and 7 are perspective views of a choke nozzle and a movable-side arc contactor applied to a gas-insulated switchgear according to an embodiment of the present invention. A detailed description will now be made of the ashing portion of the gas insulated switchgear according to one embodiment of the present invention with reference to the drawings.

The soot portion of the gas insulated switchgear according to an embodiment of the present invention includes a stationary-side arc contactor 10; A cylinder rod 25 coupled to the center of the axis of the movable cylinder 20 and linearly driven by the drive unit (not shown); A movable-side arc contactor (30) installed on the cylinder rod (25) and capable of contacting or separating from the fixed-side arc contactor (10); A main nozzle (35) coupled to the movable cylinder (20) for controlling the thermal gas caused by an arc generated when the fixed arc contact (10) and the movable arc contact (30) are separated; An auxiliary nozzle (40) coupled to the cylinder rod (25) and controlling the heat gas caused by an arc in the rear of the main nozzle (35); And a choke nozzle 50 coupled to an inlet of the cylinder rod 25 for controlling the flow of heat gas by an arc, wherein a plurality of gas holes 55 are formed in the choke nozzle 50, A part of the thermal gas generated in the nozzle 40 passes through the gas hole so as to be introduced into the cylinder rod 25.

The soot portion of the gas insulated switchgear according to one embodiment of the present invention largely consists of a fixed portion and a movable portion. The fixing portion maintains a fixed state at the time of energization and shutdown of the gas insulated switchgear, and the movable portion receives power of the driving portion (not shown) and moves forward or backward to come into contact with or separate from the fixed portion to energize or cut off the circuit.

The stationary portion includes a stationary contact (not shown) and a stationary-side arc contact 10 which are provided on a stationary support (not shown).

The fixed-side arc contactor 10 is formed in a cylindrical shape along the center axis of the fixed portion.

A movable side support (not shown) is mounted on the movable side. The movable cylinder 20, the cylinder rod 25, the movable arc contact 30, the main nozzle 35, the auxiliary nozzle 40, the choke nozzle 50, and the like.

The movable cylinder 20 is formed in a cylindrical shape and is slidably mounted on a movable side support (not shown). The movable cylinder 20 is coupled to the cylinder rod 25 and moves together with the cylinder rod 25.

A cylinder rod 25 is installed along the central axis of the movable cylinder 20. [ The cylinder rod 25 is moved by the power transmitted from a driving unit (not shown), and moves the movable cylinder 20 together.

The main nozzle 35 is fixedly coupled to the inside of the upper end portion of the movable cylinder 20 and moves together with the movable cylinder 20. [ Side arc contact 10 is inserted into the main nozzle 35 when the gas-insulated switchgear is closed (energized state), and when the gas-insulated switchgear is open (disconnected state) (10) is separated from the main nozzle (35).

The movable-side arc contact 30 is engaged with the upper end of the cylinder rod 25, and moves along with the movement of the cylinder rod 25 to contact or separate from the stationary-side arc contactor 10. When the gas insulated switchgear is disconnected, the movable arc contact 30 is disconnected from the stationary arc contact 10, and a high-temperature, high-pressure arc is generated. At this time, the movable-side arc contact 30 is opened so that the stationary-side arc contact 10 can escape. 7, since the plurality of split grooves 31 are formed along the longitudinal direction in the movable-side arc contactor 30, the movable arc-contact 30 and the stationary-side arc contactor 10 The pressure of the arc caused by the arc.

An auxiliary nozzle (40) is provided between the movable arc contact (30) and the main nozzle (35). The auxiliary nozzle (40) is coupled to the cylinder rod (25) while surrounding the movable arc contact (30). The auxiliary nozzle (40) functions to allow a part of the heat gas generated by the arc generated when the auxiliary nozzle (40) is cut off to flow out through the inside of the cylinder rod (25).

The choke nozzle 50 is coupled to the inlet of the cylinder rod 25 to control the flow of the heat gas generated by the arc generated in the auxiliary nozzle 40. The choke nozzle 50 is generally formed in a circular tube shape. The choke nozzle 50 may include a body portion 51 formed at the front side, a coupling portion 53 formed at the rear side, and a neck portion 52 formed between the body portion 51 and the coupling portion 53 . On the inner circumferential surface of the choke nozzle 50, a neck is formed at the rear portion. That is, the inner diameter of the neck portion 52 and the engaging portion 53 is narrower than the inner diameter of the body portion 51 to serve as a nozzle. Accordingly, it is possible to control the flow (velocity, flow rate, etc.) of the thermal gas flowing into the cylinder rod 25.

A plurality of gas holes 55 are formed in the body portion 51 of the choke nozzle 50 so that heat gas generated by the arc generated in the auxiliary nozzle 40 flows into the cylinder rod 25 .

Here, a plurality of gas holes 55 may be formed along the longitudinal direction. The diameter of the gas hole 55 that can be machined in the body portion 51 of the choke nozzle 50 can be formed to a limited size in consideration of the strength of the choke nozzle 50, It is desirable to process within the design range, but to make multiple.

Further, the gas holes 55 may be arranged in a plurality of rows along the circumferential direction. The inflow amount can be increased by forming a plurality of rows so as to form a predetermined angle along the circumferential surface of the choke nozzle 50.

The heat generated by the gas holes 55 is preferably formed at a position corresponding to the split groove 31 formed along the longitudinal direction of the movable-side arc contactor 30. The movable arc contact 30 is shown in Fig. A split groove 31 is formed in the movable-side arc contact 30 and can be opened by internal pressure. It is preferable that the gas holes 55 are formed corresponding to the positions where the split grooves 31 are formed so that the heat gas flowing through the split grooves 31 can pass through the choke nozzle 50. [ For example, if the split grooves 31 are formed in six rows at angular intervals of 60 degrees in the circumferential direction in the movable arc contact 30, the gas holes 55 are also formed at angular intervals of 60 degrees in the circumferential direction of the body portion 51 6 rows.

The arc gas generated between the stationary arc contact 10 and the movable arc contact 30 when the gas hole 55 is formed in the choke nozzle 50 causes thermal gas to flow into the auxiliary nozzle 40 The hot gas passes through the split groove 31 of the movable arc contact 30 and the gas hole 55 of the choke nozzle 50 and flows into the cylinder rod 25 to be discharged to the rear side There is an effect to be. Accordingly, there is an effect that the phenomenon that the auxiliary nozzle 40 is inflated or broken due to heat and pressure of the heat gas generated in the auxiliary nozzle 40 is prevented.

8 is a perspective view of a choke nozzle applied to a gas insulated switchgear according to another embodiment of the present invention. In this embodiment, the gas holes 65 of the choke nozzle 60 are formed in an oblique direction so as to converge toward the cylinder rod 25. In the choke nozzle 50 of the previous embodiment, if the gas hole 55 is formed vertically, in this embodiment, the gas hole 65 of the choke nozzle 60 is formed in the oblique direction, Is smoothly formed in the direction from the auxiliary nozzle (40) toward the cylinder rod (25), and the discharge of the thermal gas is further promoted.

9 is a perspective view of a choke nozzle applied to a gas insulated switchgear according to another embodiment of the present invention. In this embodiment, the gas hole 75 of the choke nozzle 70 is formed so that the inlet portion 76 of the outer peripheral surface is wider than the discharge portion 77 of the inner peripheral surface. Accordingly, each gas hole 75 also serves as a nozzle. That is, the flow of the thermal gas can be controlled.

10 is a perspective view of a choke nozzle applied to a gas insulated switchgear according to another embodiment of the present invention. In this embodiment, the gas hole 85 of the choke nozzle 80 is formed as a long hole along the longitudinal direction. This has the effect of increasing the amount of the introduced thermal gas.

According to an embodiment of the present invention, a gas hole is formed in the choke nozzle so that the thermal gas generated in the auxiliary nozzle during the shutoff can flow into the cylinder rod through the gas hole . As a result, there is an effect that the hot gas generated inside the auxiliary nozzle by the arc at the time of interruption is rapidly discharged into the cylinder rod. As described above, the hot gas generated in the auxiliary nozzle is rapidly discharged to the outside through the inside of the cylinder, thereby preventing expansion and breakage of the auxiliary nozzle.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical idea of the present invention, and the scope of technical idea of the present invention is not limited by these embodiments. That is, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

10 stationary arc contactor 20 movable cylinder
25 Cylinder rod 30 Action arc contact
31 Split groove 35 Main nozzle
40 auxiliary nozzle 50, 60, 70, 80 choke nozzle
51 Body portion 52 Thickness
53 joint part 55, 65, 75, 85 gas hole
76 inlet portion 77 outlet portion

Claims (7)

Fixed side arc contactor;
A cylinder rod coupled to the center of the shaft of the movable cylinder and linearly moving under the power of the driving unit;
A movable-side arc contact which is provided on the cylinder rod and can be brought into contact with or separated from the fixed-side arc contactor;
A main nozzle coupled to the movable cylinder for controlling thermal gas caused by an arc generated when the stationary-side arc contactor and the movable-side arc contactor are separated;
An auxiliary nozzle coupled to the cylinder rod for controlling an arc of heat gas behind the main nozzle;
And a choke nozzle coupled to the inlet of the cylinder rod for controlling the flow of the heat gas by the arc,
Wherein a plurality of gas holes are formed in the choke nozzle so that a part of the thermal gas generated in the auxiliary nozzle can flow into the cylinder rod through the gas hole. part. The gas insulated switchgear according to claim 1, wherein the gas holes are formed along the longitudinal direction of the choke nozzle. 2. The gas insulated switchgear according to claim 1, wherein the gas holes are arranged in a plurality of rows along the circumferential direction of the choke nozzle. The small-diameter portion of the gas insulated switchgear according to claim 1, wherein the gas hole is formed at a position corresponding to a split groove formed along the longitudinal direction of the movable-side arc contactor. 2. The gas insulated switchgear according to claim 1, wherein the gas holes are formed in an oblique direction converging toward the cylinder rod. 2. The gas insulated switchgear according to claim 1, wherein the gas hole is formed so that an inlet portion of the outer circumferential surface is wider than a discharge portion of the inner circumferential surface. The gas insulated switchgear according to claim 1, wherein the gas hole is formed as a long hole along the longitudinal direction of the choke nozzle.
KR2020150002726U 2015-04-27 2015-04-27 Extinguishing Unit of Gas Insulated Switchgear KR20160003827U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020150002726U KR20160003827U (en) 2015-04-27 2015-04-27 Extinguishing Unit of Gas Insulated Switchgear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR2020150002726U KR20160003827U (en) 2015-04-27 2015-04-27 Extinguishing Unit of Gas Insulated Switchgear

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KR20160003827U true KR20160003827U (en) 2016-11-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230099136A (en) 2021-12-27 2023-07-04 엘에스일렉트릭(주) Gas Insulated Switchgear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230099136A (en) 2021-12-27 2023-07-04 엘에스일렉트릭(주) Gas Insulated Switchgear

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