KR101048969B1 - Flow guide apparatus of arc gas for high voltage switchgear - Google Patents

Flow guide apparatus of arc gas for high voltage switchgear Download PDF

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Publication number
KR101048969B1
KR101048969B1 KR1020100018711A KR20100018711A KR101048969B1 KR 101048969 B1 KR101048969 B1 KR 101048969B1 KR 1020100018711 A KR1020100018711 A KR 1020100018711A KR 20100018711 A KR20100018711 A KR 20100018711A KR 101048969 B1 KR101048969 B1 KR 101048969B1
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KR
South Korea
Prior art keywords
guide tube
ultra
diameter
high pressure
diameter part
Prior art date
Application number
KR1020100018711A
Other languages
Korean (ko)
Inventor
윤정훈
Original Assignee
엘에스산전 주식회사
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Priority to KR1020100018711A priority Critical patent/KR101048969B1/en
Application granted granted Critical
Publication of KR101048969B1 publication Critical patent/KR101048969B1/en

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    • 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
    • H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
    • H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
    • H01H33/304—Working fluid supplies
    • 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
    • H01H33/7015—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts
    • H01H33/7038—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle
    • H01H33/7046—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid characterised by flow directing elements associated with contacts characterised by a conducting tubular gas flow enhancing nozzle having special gas flow directing elements, e.g. grooves, extensions
    • 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
    • H02B13/055—Features relating to the gas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2239/00—Miscellaneous
    • H01H2239/044—High voltage application

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

Abstract

PURPOSE: An arc gas flow guide apparatus of an ultrahigh voltage switch gear is provided to prevent lowering of an insulation performance in accordance with feeback of the arc gas to a contactor when the ultrahigh voltage switch gear performs a cut-off operation. CONSTITUTION: A guide tube(400) includes an identical diameter part and a variable diameter part. The identical diameter part has the identical diameter. The variable diameter part is extended from the identical diameter part. The diameter of the variable diameter part gets smaller as it gets more separated from the identical diameter part. The guide tube is fixed within the ultrahigh voltage switch gear. A classifying plate(500) faces an end of the variable diameter part of the guide tube, guides the heat gas taken through the variable diameter part into two directions.

Description

Heat gas flow guide device of ultra high pressure switchgear {FLOW GUIDE APPARATUS OF ARC GAS FOR HIGH VOLTAGE SWITCHGEAR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ultrahigh pressure switch gears, and more particularly, to a flow guide device for hot gas generated during a shutoff operation in ultra high pressure switch gears.

The ultra high voltage switchgear is installed on a high voltage electric line of tens of kilovolts or more and several hundred kilovolts. It is an electric device that protects an electric power system and electric equipment by automatically cutting off a line automatically when a large current occurs. Such ultra-high pressure switchgear is sprayed through the nozzle with a good insulation insulating pressure (for example, sulfur hexafluoride (SF 6 ) gas or nitrogen gas) compressed in the compression chamber when the switchgear trips. And a gas insulated switchgear which extinguishes an arc generated between the contacts during a trip operation, and a solid insulated switchgear which is composed of a solid insulator without the use of such a sour gas to realize electrical insulation between phase switching devices.

The structure and operation according to the related art of the gas-insulated switchgear among the aforementioned ultra-high pressure switchgear are described with reference to FIGS. 1 and 2 as follows.

1 and 2 illustrate an example of an opening and closing device of a gas insulated switchgear provided with a flow gas flow guide device according to the present invention, except for the flow gas flow guide device according to the present invention. Since the structure according to the present invention will be described with reference to FIGS. 1 and 2.

1 is a side cross-sectional view showing a switchgear structure of a gas insulated switchgear for installing a flow gas flow guide device according to the present invention in a closed state (ON state), and FIG. 2 is a heat gas according to the present invention. Fig. 2 is a side sectional view showing a state in which an opening and closing device of a gas insulated switchgear for installing a flow guide device is operated in an open position, that is, a trip position.

Opening and closing device as shown in Figure 1 is composed of a fixed side unit and a movable side unit.

The fixed side unit here is composed of a first fixed contact 100 and a first arc contact 110.

The movable side unit includes a second fixed contactor 200, a movable contactor 300 movably installed in the second fixed contactor 200, and a compression chamber 240 formed in the movable contactor 300. And a second arc contactor 210 connected to or detached from the first arc contactor 110 while moving together as the movable piston 300 moves in accordance with the movement of the movable contactor 300 and the movable contactor 300. The nozzle 230 and a connecting rod (not shown) for connecting the cylinder rod 250 of the movable contact 300 to an actuator (not shown) of the switchgear.

A first link 105 rotatably connected around a connecting pin and a pin connected to the first end of the nozzle 230 by a connecting pin 107 rotatably connected to the first link 105. And a second link 104 interlocked with the movement of the first link 105 and rotatable about a fixing pin 106, and one end of which is rotatably connected to the second link 104. The other end is connected to the third link 103 is connected to the delay means.

The retardation means may include a sliding recess 101 formed at a predetermined length in the first arc contact 110 and a third recess 103 in the sliding recess 101. And a sliding mass 102 which is slide movable and transmits power from the third link 103 to the first arc contact 110 with a delay of a movement time in the sliding groove 101. do.

In the switching device having the above-described configuration, as shown in FIG. 1, in the normal energized state, the second arc contactor 210 is connected to the first arc contactor in a state in which the movable contactor 300 and the second fixed contactor 200 are in contact with each other. In contact with 110, the electrical circuitry remains closed.

When the opening and closing device is tripped in the above state, as shown in the accompanying FIG. 2, a force to pull the cylinder rod 250 in the right direction (open direction) on the drawing through a connecting rod connected to an external actuator not shown. This transfer starts a high speed trip operation, and the movable contact 300 and the second arc contact 210 connected to the cylinder rod 250 move together in the right direction on the drawing.

At this time, as described above, the movable side 300, that is, the movable contact 300 and the second arc contact 210 move to the right side (open direction) in the drawing, and a plurality of links 103 connected to the front end of the nozzle 230. 104 and 105, the 1st arc contact 110 moves to the direction opposite to the moving direction of a movable side (left direction on drawing).

That is, when the first link 105 connected to the front end of the nozzle 230 moves in the right direction in the drawing, the second link 104 rotates in the counterclockwise direction around the fixing pin 106. As the second link 104 rotates, the third link 103 connected thereto moves in the left direction, and thus the sliding mass 102 connected to the third link 103 also slides 101. ) Is linearly moved to the left in the drawing.

Therefore, according to the movement time of the sliding mass 102 according to the moving distance of the sliding mass 102 determined by the length of the sliding groove 101, the first arc contactor 110 is delayed for a predetermined time and thus, the sliding mass 102 of the sliding mass 102 is removed. It is moved to the left in the drawing by the power transmitted through the contact.

In the opening and closing device having the above-described configuration, the first arc contact 110 is delayed by a predetermined time by the time that the sliding mass 102 slides in the sliding groove 101 and reaches the end of the sliding groove 101. The arc contacts are opened after a predetermined time after the main contact is opened by the structure which can be moved. At this time, the arc extinguished in the compression chamber 240 is compressed while extinguishing the arc generated through the nozzle.

As described above, when the arc contacts 110 and 210 are opened as shown in FIG. 2, heat gas is generated together with the generation of an arc, and the arc contacts are shown through the compression chamber 240 as indicated by arrows in FIG. 2. Flows backwards (110, 210).

However, conventionally, there is no flow guide device for the hot gas, so that the hot gas does not flow only behind the arc contacts 110 and 210, but flows back to the contactor such as the arc contacts 110 and 210, thereby obstructing arc extinguishing and There was a problem of lowering the insulation performance.

Accordingly, the present invention solves the problems of the prior art, the object of the present invention is to heat the gas to prevent the high-pressure switchgear flows back to the contactor during the operation (trip) operation to lower the insulation performance due to the blocking It is to provide a hot gas flow guide device of the ultra-high pressure switchgear that can lead to a position away from the contact.

An object of the present invention, in the hot gas flow guide device of the ultra-high pressure switch gear,

In order to induce heat gas generated when the ultra-high pressure switchgear is cut off, a copper diameter portion having a constant diameter and a change diameter portion having a diameter extending from the copper diameter portion and varying so that the diameter decreases away from the copper diameter portion are provided. A guide tube fixedly installed in the ultra-high pressure switch gear; And

It is installed to face the end of the change in diameter of the guide tube, guided to flow through the heat gas is guided through the change in diameter of the guide tube in two directions, the closer to the guide tube is formed into a pointed horn shape It can be achieved by providing a heat gas flow guide device of the ultra-high pressure switch gear according to the invention, characterized in that it comprises a classification plate.

The hot gas flow guide device of the ultra-high pressure switch gear of the present invention comprises a guide tube having a constant diameter diameter and a change diameter portion extending from the dynamic diameter portion and having a diameter that changes so that the diameter decreases away from the dynamic diameter portion. And, as the guide tube is closer to the pointed to form a classification plate is formed, the heat gas generated during the operation of the blocking operation of the ultra-high pressure switch gear is induced and classified, so that it is guided to move away from the contact of the ultra-high pressure switch gear As a result, the blocking and the insulation are delayed by the return of the heat gas to the contactor, whereby the insulation performance during the breaking operation can be prevented from being lowered.

In the heat gas flow guide device of the ultra-high pressure switch gear of the present invention, since the plurality of gas through holes are provided in the copper diameter part, the heat gas classified by the splitter plate through the gas through hole is again returned through the inside of the guide pipe and the guide pipe. It is possible to obtain the effect of forming a path that can be guided to the classification plate.

1 is a side cross-sectional view illustrating a structure of an open / close device of a gas insulated switchgear for installing a flow guide device of a heat gas according to the present invention in a closed state (ON state),
2 is a side cross-sectional view showing a state in which an opening and closing device of a gas insulated switchgear for installing a flow guide device of a heat gas according to the present invention operates in an open position, that is, a trip position;
3 is an enlarged view of a right part in FIG. 1,
Figure 4 is a longitudinal cross-sectional view of the guide tube of the flow guide device of the heat gas according to the present invention,
5 is a perspective view of a guide tube,
Figure 6 is a perspective view of the splitter plate in the flow guide device of the heat gas according to the present invention,
7 is a side view of FIG. 6.

The object of the present invention and the constitution and effects of the present invention to achieve the same will be more clearly understood by the following description of the preferred embodiment of the present invention with reference to the accompanying drawings.

Since the configuration and operation of the ultra-high pressure switch gear for installing the heat gas flow guide device according to the present invention have been described above in the description of the background art, the description is omitted in order to avoid duplication, and the configuration of the heat gas flow guide device according to the present invention. This will be described with reference to FIGS. 1 to 7.

As can be seen in Figure 1, the heat gas flow guide device according to the present invention is configured to include a guide pipe 400, the classification plate 500.

3 and 4, the guide tube 400 includes a copper diameter portion 400a having a constant diameter and a copper diameter portion 400a so as to induce heat gas generated when the ultra-high pressure switch gear is cut off. And has a diameter change portion 400b having a diameter that changes so that the diameter decreases as it moves away from the dynamic diameter portion 400a. Guide pipe 400 is fixedly installed in the ultra-high pressure switch gear. More specifically, the flange portion of the guide tube 400 between the two cylindrical portions in the second fixed contact 200 is formed by the two cylindrical portions of the ultra-high pressure switchgear connected in accordance with an embodiment By inserting a portion (unsigned), the guide pipe 400 is fixedly installed in the ultra-high pressure switch gear. However, the guide pipe 400 is formed by forming a screw hole in the flange portion and fixed to the intermediate support wall of the second fixed contactor 200 with fixing bolts and nuts, or the flange portion of the second fixed contactor 200 It can be fixed in various other ways, such as by welding to and attaching to the intermediate support wall. 3 to 5, the copper diameter portion 400a of the guide tube 400 has a plurality of gas through holes 400a-1. Through the gas through hole 400a-1 (that is, by the gas through hole), the heat gas classified by the dividing plate 500 again flows through the inside of the guide tube 400 and through the guide tube 400 again. A route is provided that can lead to

As can be seen in Figure 1, the classification plate 500 is installed to face the end of the change diameter portion 300b of the guide tube 400, through the change diameter portion 400b of the guide tube 400 The guided hot gas flows in two directions. 1 and 7, the splitter plate 500 may be formed in a pointed cone shape as the guide tube 400 approaches. The sorting plate 500 has a pointed shape as the guide tube 400 approaches, and may be configured in the form of a square pyramid and a triangular pyramid in addition to the cone. The splitter plate 500 is a plan extending flat from the splitter surface 500a for fixing the splitter plate 500 and the splitter surface portion 500a having a pointed tip as described above for the two-way jetting of hot gas. A flange portion 500b. The splitter plate 500 is an end wall surface of the rear cylindrical portion of the two cylindrical portions joined in the second fixed contactor 200 formed by the two cylindrical portions of the ultra-high pressure switchgear connected according to a preferred embodiment. The flange portion 500b is fixed to the ultra high pressure switchgear by being fixed by bolts and nuts. Of course, the method of fixing the sorting plate 500 in the ultra-high pressure switch gear is possible in a variety of embodiments, such as sandwiching between the welding, the support member and the wall surface of the ultra-high pressure switch gear in addition to the above method.

On the other hand, the operation (operation) of the heat gas flow guide device of the ultra-high pressure switch gear according to the present invention configured as described above will be described.

As shown in FIG. 2, when the arc contactors 110 and 210 are opened during the blocking operation, heat gas is generated together with the generation of an arc, and thus the second arc contact 210 is opened through the compression chamber 240 in FIG. 2. It flows backward (rightward in Fig. 2).

The heat gas flowing backward of the second arc contact 210 is guided toward the splitter plate 500 through the guide tube 400 as can be seen in FIG. 3.

In particular, the heat gas is guided so that the flow is concentrated toward the splitter plate 500 by the change diameter part 400b of the guide tube 400, and the splitter plate 500 has a sharp horn structure as the guide tube 400 approaches the guide tube 400. Since the hot gas impinging on the splitter plate 500 is classified in two directions by the splitter surface part 500a, the flow is guided to the upper and lower sides of the guide pipe 400, respectively.

The heat gas guided to the upper and lower sides of the guide tube 400 is blocked by the outer wall surface and the intermediate support wall of the rear one of the two cylindrical portions joined in the second fixed contactor 200 and the outer surface of the guide tube 400. After flowing along, it is introduced into the guide tube 400 through a plurality of gas through holes 400a-1 formed in the copper diameter portion 400a of the guide tube 400, and again through the inside of the guide tube 400 The heat gas flowing toward the splitter plate 500 and then collided with the splitter surface portion 500a of the splitter plate 500 is classified in two directions so that the heat gas is guided to the upper and lower sides of the guide tube 400, respectively. It will hover between the pipe 400 and the sorting plate 500.

As described above, the heat gas generated during the blocking operation of the ultra high pressure switch gear is induced and classified by the hot gas flow guide device of the ultra high pressure switch gear according to the present invention. As a result, the blocking and the insulation are delayed by the return of the heat gas to the contactor, thereby preventing the insulation performance from being lowered during the blocking operation.

100: first fixed contact 101: sliding groove
102: sliding mass 103: third link
104: second link 105: first link
106: fixing pin 107: connecting pin
110: first arc contact 200: second fixed contact
210: second arc contact 220: fixed piston
230: nozzle 240: compression chamber
250: cylinder rod 300: movable contactor
400: guide pipe 400a: copper diameter
400a-1: gas through hole 400b: changing diameter part
500: classification plate 500a: classification surface part
500b: flange

Claims (2)

In the heat gas flow guide device of the ultra-high pressure switchgear,
In order to induce heat gas generated when the ultra-high pressure switchgear is cut off, a copper diameter portion having a constant diameter and a change diameter portion having a diameter extending from the copper diameter portion and varying so that the diameter decreases away from the copper diameter portion are provided. A guide tube fixedly installed in the ultra-high pressure switch gear; And
It is installed to face the end of the change in diameter of the guide tube, guided to flow through the heat gas is guided through the change in diameter of the guide tube in two directions, the closer to the guide tube is formed into a pointed horn shape Heat gas flow guide device of the ultra-high pressure switch gear, characterized in that comprising a; classification plate. The method of claim 1,
The high diameter switchgear heat gas flow guide device, characterized in that the copper diameter portion of the guide tube has a plurality of gas through holes.
KR1020100018711A 2010-03-02 2010-03-02 Flow guide apparatus of arc gas for high voltage switchgear KR101048969B1 (en)

Priority Applications (1)

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KR1020100018711A KR101048969B1 (en) 2010-03-02 2010-03-02 Flow guide apparatus of arc gas for high voltage switchgear

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Application Number Priority Date Filing Date Title
KR1020100018711A KR101048969B1 (en) 2010-03-02 2010-03-02 Flow guide apparatus of arc gas for high voltage switchgear

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017162517A1 (en) * 2016-03-24 2017-09-28 Abb Schweiz Ag Electrical circuit breaker device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090059818A (en) * 2007-12-07 2009-06-11 현대중공업 주식회사 Apparatus for hot gas exhaustion of gas insulation switch

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090059818A (en) * 2007-12-07 2009-06-11 현대중공업 주식회사 Apparatus for hot gas exhaustion of gas insulation switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017162517A1 (en) * 2016-03-24 2017-09-28 Abb Schweiz Ag Electrical circuit breaker device

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