KR101909015B1 - Gas insulated circuit breaker - Google Patents

Abstract

An object of the present invention is to provide a gas insulated switchgear capable of increasing the density of insulated gas sprayed between gaps where arcing occurs during a shutoff operation.
A gas insulated-circuit breaker according to an embodiment of the present invention includes: a fixing part constituting a main current conduction path; A movable part disposed to face the fixed part and connected to and separated from the fixed part by advancing and retreating; A movable-side arc contact whose behavior is coincident with the movable portion; A fixed-side arc contact provided in the fixed portion and operative in a direction opposite to the moving direction of the movable portion in association with the advancing and retreating movement of the movable portion, the distal end portion being connected to and separated from the movable-side arc contact; And gas injecting means provided at the fixed-side arc contact and injecting an insulating gas to a distal end of the fixed-side arc contact in cooperation with a retreating operation of the fixed-side arc contact, wherein the movable portion includes a thermal expansion chamber; A per chamber communicating with the thermal expansion chamber; And a perpulse stone provided inside the perforation chamber so as to inject the insulated gas accommodated in the perforation chamber into the gap through the thermal expansion chamber at retraction.

Description

[0001] GAS INSULATED CIRCUIT BREAKER [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas insulated interrupter, and more particularly, to a dual motion type gas insulated interrupter in which a stationary side arc contact moves in conjunction with movement of a movable portion.

The gas insulated breaker of dual motion type or double action type is a type of gas insulated breaker which has the advantage of increasing the insulation distance between the poles and reducing the size of the device while operating the stationary side arc contact in conjunction with movement of the movable part during the break to be.

In addition, the gas insulated circuit breaker is filled with SF ₆ gas, which is an insulating medium, at a high pressure, and has a compression chamber and an expansion chamber on the upstream side in order to flow the SF ₆ gas during operation.

During the shutdown operation, the thermal gas in the expansion chamber generated by the arc energy is flowed along the nozzle part duct to extinguish the arc generated between the arc contacts.

However, the gas-insulated circuit breaker according to the related art injects the SF ₆ gas through the nozzle portion only in the main operation side in the shutdown operation, so that the distribution efficiency of the gas density with respect to the arc generation portion may be lowered, .

Japanese Patent Application Laid-Open No. 10-2007-0118885 discloses a conventional dual motion type gas insulated breaker in which insulating gas is injected only on the main moving side.

KR 10-2007-0118885 A

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve at least some of the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a gas insulated breaker capable of increasing the density of insulated gas injected into a gap, .

According to one aspect of the present invention for achieving at least part of the above objects, the present invention provides a semiconductor device comprising: a fixing portion constituting a main current conduction path; A movable part disposed to face the fixed part and connected to and separated from the fixed part by advancing and retreating; A movable-side arc contact whose behavior is coincident with the movable portion; A fixed-side arc contact provided in the fixed portion and operative in a direction opposite to the moving direction of the movable portion in association with the advancing and retreating movement of the movable portion, the distal end portion being connected to and separated from the movable-side arc contact; And gas injecting means provided at the fixed-side arc contact and injecting an insulating gas to a distal end of the fixed-side arc contact in cooperation with a retreating operation of the fixed-side arc contact, wherein the movable portion includes a thermal expansion chamber; A per chamber communicating with the thermal expansion chamber; And a perpulse stone provided inside the perforation chamber to inject an insulating gas accommodated in the perforation chamber into the gap between the thermal expansion chambers during retraction, ; And a gas inlet formed in the cylinder so as to face the movable arc contact, so that air or insulation gas outside the cylinder flows into the cylinder through the gas inlet by movement of the fixed side arc contact Can be provided.

In one embodiment, the gas injection means includes: an injection nozzle unit formed at a tip end of the fixed-side arc contact; And a gas flow path connected to the injection nozzle unit and formed inside the stationary arc contact.

Further, in one embodiment, the gas injection means includes: an inner chamber formed inside the fixed-side arc contact and connected to a rear end of the gas passage portion, in which an insulating gas is accommodated; And an inner piston fixed to the fixed portion and slidably inserted into the inner chamber.

Further, in one embodiment, the gas injection means includes: the cylinder; An outer chamber formed inside the cylinder and containing an insulating gas; An outer piston provided outside the fixed side arc contact and slidably inserted into the outer chamber; And a gas passage formed in the fixed side arc contact and communicating the outer chamber and the gas passage portion.

According to one embodiment of the present invention having such a configuration, an effect that the breaking performance of the circuit breaker is improved can be obtained.

1 is a sectional view of a gas insulated interrupter according to a first embodiment of the present invention in a closed state.
2 is a cross-sectional view of a gas insulated interrupter according to a first embodiment of the present invention in a cut-off operation.
3 is a sectional view of a gas insulated interrupter according to a second embodiment of the present invention in a closed state.
4 is a cross-sectional view of a gas insulated interrupter according to a second embodiment of the present invention during a cut-off operation.
5 is a sectional view of a gas insulated interrupter according to a third embodiment of the present invention in a closed state.
6 is a cross-sectional view of the gas insulated circuit breaker according to the third embodiment of the present invention.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Furthermore, the singular forms "a", "an," and "the" include plural referents unless the context clearly dictates otherwise.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 to 6, a gas insulated circuit breaker 100 according to an embodiment of the present invention will be described.

1 to 6, a gas insulated circuit breaker 100 according to an embodiment of the present invention includes a fixed portion 110, a fixed side arc contact 114, a movable portion 120, a movable side arc contact 124, a nozzle 130, a dual motion means 140 and a gas injection means 150.

The fixing part 110 constitutes a main current conduction path and may have a fixed contact 112 at its tip end. In one embodiment, the fixing portion 110 is configured in the form of a cylinder having a space in which a fixed side arc contact 114, a dual motion means 140, and a gas injection means 150 can be installed, But is not limited thereto.

The fixed side arc contact 114 is provided inside the fixed portion 110 and operates in the direction opposite to the moving direction of the movable portion 120 in conjunction with the advancing and retreating movement of the movable portion 120, (Not shown).

The movable part 120 is connected to the fixed part 110 to form a main current conduction path. The movable part 120 is disposed to face the fixed part 110 and is connected to a driving part (not shown) And can be connected to and separated from the fixing portion 110.

The movable contact 122 may be provided at the distal end of the movable part 120 to contact the fixed contact 112 of the fixed part 110 when the breaker is inserted.

In addition, in one embodiment, the movable portion 120 may include a thermal expansion chamber 125 and a purge chamber 126 therein.

Here, the thermal expansion chamber 125 is a space in which the insulation gas is accommodated and does not change in volume during the shutoff operation of the circuit breaker. The perforation 126 is formed in the rear end of the thermal expansion chamber 125, The volume of the circuit breaker is reduced during the breaking operation. To this end, a perforated stone 127 may be inserted into the perforation 126.

In this structure, when the movable portion 120 is retracted when the circuit breaker is interrupted, the volume of the perforation 126 is reduced by the perforated block 127 so that the insulated gas stored in the perforation 126 flows through the thermal expansion chamber 125 And can be injected into the gap.

Further, in the thermal expansion chamber (125), the insulating gas of high temperature and high pressure generated in the gap between the gates when shutting off the large current can be temporarily accommodated.

The movable-side arc contact 124 is provided inside the movable part 120 and can be matched to the movable part 120. This movable-side arc contact 124 may be configured in such a manner that the fixed-side arc contact 114 can be inserted into the distal end portion.

The nozzle 130 may be provided to surround the distal end of the movable arc contact 124 at the distal end of the fixed part 110. The insulating gas in the thermal expansion chamber 125 may be connected to the stationary arc contact 114 and the movable-side arc contact 124, as shown in Fig.

The dual motion means 140 transmits the advancing and retreating movement of the movable portion 120 to the stationary side arc contact 114 in the direction opposite to the moving direction so as to interlock with the advancing and retreating movement of the movable portion 120, (114) can be operated in a direction opposite to the moving direction of the movable part (120).

In the embodiments shown in Figures 1-6, the dual motion means 140 is fixed to the nozzle 130 to transfer motion of the nozzle 130 coupled to the movable portion 120 to the fixed side arc contact 114 Side arc contact 114 and a plurality of links and levers connected between the fixed-side arc contact 114 and the stationary-side arc contact 114. However, the present invention is not limited thereto, .

The gas injection means 150 is provided in the fixed side arc contact 114 and interlocks with the retreating operation of the fixed side arc contact 114 during the breaking operation of the circuit breaker to isolate the tip portion of the fixed side arc contact 114, Gas can be injected.

That is, the gas-insulated circuit breaker 100 according to the embodiment of the present invention can inject the insulated gas into the gaps even in the side of the fixed portion 110, in addition to the insulated gas injected in the gap between the movable portion 120 and the movable portion 120 during the shutdown operation.

Accordingly, the gas insulated circuit breaker 100 according to an embodiment of the present invention has an advantage that the density of the insulated gas injected between the gates increases during the cutoff operation, thereby improving the breaking performance of the breaker.

In one embodiment, the gas injection means 150 includes an injection nozzle portion 151 formed at the tip of the fixed-side arc contact 114 and through which the insulating gas is injected to the distal end of the fixed-side arc contact 114, Side arc contact 114 and a gas passage 152 formed in the fixed-side arc contact 114. As shown in FIG.

When the fixed side arc contact 114 is retracted during the breaking operation of the breaker, the insulating gas at the fixed portion 110 side flows through the gas passage portion 152 in the fixed side arc contact 114, And then can be injected into the gap through the injection nozzle unit 151.

Further, in one embodiment, the injection nozzle portion 151 is a through-hole formed in the distal end portion of the fixed-side arc contact 114, and may be formed with a plurality of intervals along the periphery of the distal end portion of the fixed-side arc contact 114 have. At this time, the plurality of injection nozzle portions 151 may be formed to be inclined in the radial direction of the fixed-side arc contact 114 while facing the front of the fixed-side arc contact 114.

Through this structure, the injection nozzle portion 151 can inject the insulating gas over the entire region where the stationary-side arc contact 114 and the movable-side arc contact 124 are separated and then separated.

The gas injection unit 150 may include a structure for generating a pressure of the insulated gas injected through the gas flow channel 152 and the injection nozzle unit 151 during the shutoff operation of the circuit breaker.

Hereinafter, specific embodiments of the gas injection means 150 will be described with reference to FIGS. 1 to 6. FIG. 1 and 2 show a first embodiment of the present invention. FIGS. 3 and 4 show a second embodiment of the present invention, and FIGS. 5 and 6 show a third embodiment of the present invention.

≪ Example 1 >

1 and 2, in Embodiment 1 of the present invention, the gas injection means 150 may include an inner chamber 153 and an inner piston 154.

The inner chamber 153 is formed inside the stationary arc contact 114 and is connected to the rear end of the gas passage 152 to receive the insulated gas.

The inner piston 154 is fixed to the fixed portion 110 and can be slidably inserted into the inner chamber 153. In one embodiment, the inner piston 154 is fixedly projected to the rear end inside the fixing portion 110 and can be inserted into the rear end of the fixed side arc contact 114.

When the fixed side arc contact 114 is retracted in the shutting operation of the circuit breaker, the gas injection means 150 having such a configuration reduces the volume of the inner chamber 153 through the inner piston 154, The accommodated insulating gas can be injected into the gap through the gas passage portion 152 and the injection nozzle portion 151. [

When the fixed side arc contact 114 advances when the circuit breaker is interrupted and then recycled, the insulating gas outside the fixed side arc contact 114 passes through the injection nozzle portion 151 and the gas passage portion 152 And may be introduced into the inner chamber 153.

≪ Example 2 >

3 and 4, in the second embodiment of the present invention, the gas injection means 150 includes a cylinder 155, an outer chamber 156, an outer piston 157, a gas passage 158, And may include an inlet 159.

The cylinder 155 is a member for receiving an insulating gas therein and may be provided inside the fixing part 110.

In one embodiment, the cylinder 155 may be configured to enclose a portion in the longitudinal direction of the fixed side arc contact 114. At this time, the stationary-side arc contact 114 can be slidably coupled to the cylinder 155. In this structure, the cylinder 155 can perform the function of guiding the reciprocating movement of the stationary-side arc contact 114.

The outer chamber 156 is formed inside the cylinder 155 and corresponds to a space in which the insulated gas is accommodated.

The outer piston 157 is provided outside the stationary arc contact 114 and can be slidably inserted into the outer chamber 156. This external piston 157 is in agreement with the fixed side arc contact 114 in behavior.

In one embodiment, when the stationary-side arc contact 114 is coupled through the cylinder 155, the outer piston 157 may be configured in a plate shape provided along the outer circumferential surface of the stationary-side arc contact 114.

The outer piston 157 can partition the outer chamber 156 into a first chamber 156a and a second chamber 156b.

Here, the first chamber 156a is a space in which the volume of the stationary-side arc contact 114 decreases when the stationary-side arc contact 114 is retracted, and the second chamber 156b is a space in which the volume of the stationary- to be.

The gas passage 158 is formed in the fixed side arc contact 114 and can communicate the gas passage portion 152 with the outer chamber 156. In one embodiment, the gas passage 158 may be formed to communicate the first chamber 156a of the outer chamber 156 and the gas passage 152. [

The gas inlet 159 is formed in the cylinder 155 and can communicate the outside of the cylinder 155 with the second chamber 156b in the outer chamber 156. [

The gas inlet 159 is connected to the second chamber 156b in which the volume increases when the outer piston 157 is retracted by the retreating operation of the fixed side arc contact 114 in the shutting operation of the breaker, And is stored inside the second chamber 156b whose volume decreases when the outer piston 157 advances due to the advancing operation of the fixed-side arc contact 114 during the closing operation of the circuit breaker Air or insulating gas can be discharged to the outside.

When the stationary-side arc contact 114 is retracted during the breaking operation of the circuit breaker, the gas injection means 150 having such a configuration retreats the outer piston 157 to return the insulated gas stored in the first chamber 156a to the gas passage 158 To the gas passage portion 152 through the gas passage portion 152.

The insulating gas injected into the gas passage portion 152 can be injected into the gap through the injection nozzle portion 151. [

When the fixed-side arc contact 114 is advanced when the circuit breaker is interrupted and then re-applied, the outer piston 157 advances, so that the insulating gas outside the fixed-side-side-quark contact contacts the injection nozzle portion 151, May be introduced into the first chamber 156a through the gas passage 152 and the gas passage 158. [

≪ Example 3 >

5 and 6, in the third embodiment of the present invention, the gas injection means 150 includes the cylinder 155 of the second embodiment in addition to the inner chamber 153 and the inner piston 154 of the first embodiment An outer chamber 156, an outer piston 157, a gas passageway 158, and a gas inlet 159. In this embodiment,

In other words, the gas injection device 150 according to the third embodiment of the present invention can have the configuration of the first embodiment and the configuration of the second embodiment together.

Here, the structure and operation of the components of the embodiment 1 and the elements of the embodiment 2 are substantially the same as those described above, and thus the detailed description thereof is omitted.

The gas injection means 150 according to the third embodiment having such a configuration is configured such that when the fixed side arc contact 114 is retracted during the breaking operation of the breaker, the volume of the inner chamber 153 is reduced and the first The volume of the chamber 156a is reduced and the insulating gas stored in the first chamber 156a in addition to the insulating gas stored in the inner chamber 153 can be injected into the gap.

Therefore, the gas injection means 150 according to the third embodiment can inject a larger amount of insulating gas into the gaps than in the first and second embodiments, thereby further improving the breaking performance of the circuit breaker.

While the present invention has been particularly shown and described with reference to particular embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention as defined by the following claims I would like to make it clear.

100: gas insulated breaker 110:
112: fixed contact 114: stationary arc contact
120: moving part 122: movable contact
124: movable side arc contact 125: thermal expansion chamber
126: Perpsil 127:
130: nozzle 140: dual motion means
150: gas injection means 151: injection nozzle unit
152: gas channel unit 153: inner chamber
154: inner piston 155: cylinder
156: outer chamber 156a: first chamber
156b: second chamber 157: outer piston
158: gas passage 159: gas inlet

Claims (9)

A fixing portion constituting a main current conduction path;
A movable part disposed to face the fixed part and connected to and separated from the fixed part by advancing and retreating;
A movable-side arc contact whose behavior is coincident with the movable portion;
A fixed-side arc contact provided in the fixed portion and operative in a direction opposite to the moving direction of the movable portion in association with the advancing and retreating movement of the movable portion, the distal end portion being connected to and separated from the movable-side arc contact; And
And gas injection means which is provided at the fixed side arc contact and cooperates with the retreating operation of the fixed side arc contact to inject the insulating gas to the distal end of the fixed side arc contact,
Wherein,
A thermal expansion chamber inside;
A per chamber communicating with the thermal expansion chamber; And
And a perpulse stone provided inside the perforation chamber so as to inject the insulated gas accommodated in the perforation chamber into the gap through the thermal expansion chamber at retraction,
Wherein the gas-
A cylinder receiving said fixed-side arc contact; And
And a gas inlet formed in the cylinder to face the movable arc contact,
And the air or insulating gas outside the cylinder is provided to flow into the cylinder through the gas inlet by movement of the fixed side arc contact.
The method according to claim 1,
Wherein the gas-
An injection nozzle unit formed at a tip of the fixed-side arc contact; And
And a gas passage portion connected to the injection nozzle portion and formed inside the stationary-side arc contact.
3. The method of claim 2,
Wherein the gas-
An inner chamber formed inside the stationary-side arc contact and connected to a rear end of the gas passage portion and containing an insulating gas; And
And an inner piston slidably inserted into the inner chamber and fixed to the fixed portion.
3. The method of claim 2,
Wherein the gas-
The cylinder;
An outer chamber formed inside the cylinder and containing an insulating gas;
An outer piston provided outside the fixed side arc contact and slidably inserted into the outer chamber; And
And a gas passage formed in the fixed side arc contact and communicating the outer chamber with the gas passage portion.
5. The method of claim 4,
Wherein the outer chamber is divided into a first chamber in which the volume of the fixed-side arc contact is reduced by the outer piston when the fixed-side arc contact is retracted and a second chamber in which the volume increases,
Wherein the gas passage is formed to communicate the first chamber and the gas passage portion.
6. The method of claim 5,
Wherein the cylinder is provided with the gas inlet communicating the second chamber and the outside of the cylinder.
5. The method of claim 4,
Wherein the cylinder is configured to surround a part of a lengthwise direction of the fixed-side arc contact,
Wherein the stationary-side arc contact is slidably coupled to the cylinder,
Wherein the outer piston is provided along an outer circumferential surface of the stationary-side arc contact.
3. The method of claim 2,
Wherein the gas-
An inner chamber formed inside the stationary-side arc contact and connected to a rear end of the gas passage portion and containing an insulating gas;
An inner piston fixed to the fixed portion and slidably inserted into the inner chamber;
An outer chamber formed inside the cylinder and containing an insulating gas;
An outer piston provided outside the fixed side arc contact and slidably inserted into the outer chamber; And
And a gas passage formed in the fixed side arc contact and communicating the outer chamber with the gas passage portion.
3. The method of claim 2,
Wherein a plurality of the injection nozzle portions are provided along a circumference of a distal end portion of the fixed-side arc contact,
Wherein the plurality of injection nozzle portions are formed to be inclined in the radial direction of the stationary-side arc contact pointing toward the front of the stationary-side arc contact point.

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