WO2019117620A1

WO2019117620A1 - Self-blast type gas circuit breaker

Info

Publication number: WO2019117620A1
Application number: PCT/KR2018/015761
Authority: WO
Inventors: 황동익; 정호중; 최병화; 강민철; 김명후; 김경회
Original assignee: 일진전기 주식회사
Priority date: 2017-12-14
Filing date: 2018-12-12
Publication date: 2019-06-20
Also published as: KR101983622B1

Abstract

A self-blast type gas circuit breaker according to the present invention comprises: a cylinder part having a compression chamber and an expansion chamber; a separation wall part provided in the cylinder part and dividing the compression chamber and the expansion chamber; a fluid regulating part coupled to the separation wall part so as to be openable and closable and regulating the flow of fluid from the compression chamber toward the expansion chamber; a piston part facing the separation wall part and disposed inside the compression chamber; and a dividing part coupled to the separation wall part and dividing the compression chamber.

Description

Combustion type gas shutoff device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a gas-shutoff apparatus for a combined-NO_2 system, and more particularly to a gas-

In general, when a power system fails, a breaker is used to shut down the fault current and protect the power plant. In an ultra high voltage circuit breaker, the principle for extinguishing an arc generated between two electrical contacts by a fault current is as follows.

When an arc occurs due to a fault current in the state where the insulated gas is filled with high pressure in the breaker, the arc is extinguished by directly injecting the insulated gas into the arc by compressing it to a very high pressure.

SF6 (sulfur hexafluoride) gas is widely used as an insulating gas here, and it has a high dielectric breakdown strength because it has a chemically very stable molecular structure. Because of this characteristic, SF6 insulated gas is widely used as insulation medium of high-voltage equipment, and arc extinguishing arc discharge performance is excellent, and it is widely used as arc extinguishing medium of circuit breaker.

SF6 gas circuit breaker is used for fault current interruption and protection of power system equipment when a fault occurs in most super high voltage power system. PUFFER TYPE And SELF-BLAST TYPE.

Particularly, the gas recirculation type gas circuit breaker includes two chambers such as a compression chamber and a thermal expansion chamber. In order to extinguish an arc due to a fault current, a compression chamber and a thermal expansion chamber .

Generally, the compression chamber of the gas circuit breaker is used for the small current interruption, and the thermal expansion chamber of the gas circuit breaker is used for the large current interruption.

The conventional compression chamber is constituted by a single chamber and the fluid such as the insulating gas flows only when the pressure is a specific pressure in the compression chamber in the compression chamber.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Registration No. 10-1701818 (Registered on Jul. 201, 201, entitled "Composite Loop Type Gas Circuit Breaker").

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a gas-shutoff apparatus of a combined extinguishing system capable of improving arc extinguishing performance by dividing a compression chamber and individually controlling a fluid- .

The present invention also provides a gas-shutoff apparatus for a combined-NOx system, comprising: a cylinder portion in which a compression chamber and an expansion chamber are formed; A separating wall portion provided in the cylinder portion and partitioning the compression chamber and the expansion chamber; A fluid regulating portion that is openably and closably connected to the separating wall portion and regulates the flow of the fluid from the compression chamber to the expansion chamber; A piston portion facing the separating wall portion and disposed in the compression chamber; And a partition portion coupled to the separating wall portion and partitioning the compression chamber.

In the present invention, the dividing portion is formed in parallel with the longitudinal direction of the cylinder portion, and the compression chambers are partitioned in parallel.

In the present invention, the compression chamber is partitioned by the partition into a first compression chamber portion and a second compression chamber portion.

In the present invention, the piston portion may include: a first piston portion that presses the first compression chamber portion by the partition; And a second piston portion for pressing the second compression chamber portion.

In the present invention, the fluid regulating unit may include: a first regulating unit installed at one side of the separating wall facing the first compression chamber; And a second adjusting unit installed on the other side of the separating wall facing the second compression chamber.

The controller may further include a controller for controlling driving of the first adjusting unit and the second adjusting unit such that the first adjusting unit and the second adjusting unit are opened or closed at different points of time.

A gas purifier according to the present invention comprises a first compression chamber portion partitioned by partitioning a compression chamber into a first compression chamber portion and a second compression chamber portion, There is an effect that the fluid can flow.

Also, since the compression chambers are partitioned in parallel, the fluid in the first compression chamber portion and the second compression chamber portion can be compressed with the same pressure to the piston portion.

In addition, when the high pressure fluid is flowed into the expansion chamber sequentially by opening the fluid adjusting part, specifically the first adjusting part and the second adjusting part, by the set pressure value of the first compression chamber part and the second compression chamber part, The effect can be improved.

Further, when the fluid pressure inside the compression chamber exceeds the set value due to the decompression portion, the valve is opened and discharged to the outside of the compression chamber, and damage to the composite extinguishing system gas barrier device due to the high pressure fluid can be prevented.

1 is a side cross-sectional view illustrating a gas-shutoff apparatus of a combined extinguishing system according to an embodiment of the present invention.

2 is a state diagram illustrating a state in which the first control unit is opened according to an embodiment of the present invention.

3 is a state diagram showing a state in which a second adjusting unit is opened according to an embodiment of the present invention.

4 is a side cross-sectional view illustrating a gas purifier according to an embodiment of the present invention.

5 is a state diagram showing a state in which the decompression unit is opened according to an embodiment of the present invention.

6 is a block diagram illustrating a control unit according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of a gas screening apparatus according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

1 is a side cross-sectional view illustrating a gas-shutoff apparatus of a combined extinguishing system according to an embodiment of the present invention. 2 is a state diagram illustrating a state in which the first control unit is opened according to an embodiment of the present invention. 3 is a state diagram showing a state in which a second adjusting unit is opened according to an embodiment of the present invention. 4 is a side cross-sectional view illustrating a gas purifier according to an embodiment of the present invention. 5 is a state diagram showing a state in which the decompression unit is opened according to an embodiment of the present invention. 6 is a block diagram illustrating a control unit according to an embodiment of the present invention.

1 to 6, a gas screening apparatus 1 according to an embodiment of the present invention includes a cylinder unit 100, a separating wall unit 200, a fluid regulating unit 300, a piston unit 400 A pressure measuring unit 600, a control unit 700, and a pressure reducing unit 800.

Referring to FIG. 1, in the present invention, the gas screening apparatus 1 of the present invention has a symmetrical structure with the X axis as a rotation center axis, and the configuration of one side (reference lower side in FIG. 1) (Upper side of Fig. 1 reference), and hence the drawing is omitted in the overlapping range.

Referring to FIG. 1, a compression chamber 110 and an expansion chamber 150 are formed in a cylinder portion 100 according to an embodiment of the present invention. The separating wall portion 200 to be described later is fixed and coupled to the inner surface of the cylinder portion 100.

Since the partition wall portion 200 is fixed to the inner side surface of the cylinder portion 100, the inside of the cylinder portion 100 is divided into the compression chamber 110 and the expansion chamber 150.

In the interior of the cylinder part 100 according to an embodiment of the present invention, a piston part 400 to be described later is disposed. The piston portion 400 is fixed in position and the cylinder portion 100 is moved in the left and right (reference in FIG. 1) direction.

Accordingly, when the distance between the piston portion 400 and the separating wall portion 200 is shortened, the pressure of the fluid G in the compression chamber 110, specifically the insulation gas such as SF6, is increased, The fluid G flows into the expansion chamber 150 from the compression chamber 110 through the fluid regulator 300.

1 to 5, a compression chamber 110 according to an embodiment of the present invention is partitioned by a partition 500 to be described later. Specifically, the first compression chamber portion 111 and the second compression chamber portion 113 are formed by the partition portion 500. [

As a result, as the distance between the piston 400 and the separating wall 200 approaches, the pressure in the compression chamber 110, specifically, the fluid in the first compression chamber portion 111 and the second compression chamber portion 113 G of the fixed arc contact 10 and the movable arc contact 20 are simultaneously raised by the first adjusting unit 310 and the second adjusting unit 350 that have different set pressure values, To the arc that is generated between them.

The movable arc contact 20 according to an embodiment of the present invention is coupled to the cylinder portion 100 and connected to the front end (reference left side) side of the fixed arc contact 10 through the front end (reference right side) .

In this specification, the connection and support structure at the rear end side of the fixed arc contact 10, the moving structure of the cylinder part 100, and the movement method are the same as those of the conventional gas shutoff device, and thus a detailed description thereof will be omitted.

Referring to FIG. 1, a high-temperature fluid G generated between a gap, specifically, between a fixed arc contact 10 and a movable arc contact 20 flows into an expansion chamber 150 according to an embodiment of the present invention .

In the expansion chamber 150 according to an embodiment of the present invention, the high temperature fluid G generated between the fixed arc contact 10 and the movable arc contact 20 and the fluid control part 300 in the compression chamber 110, And the fluid G to be mixed therewith is mixed to cool the fluid G to be mixed.

Referring to FIGS. 1 to 5, the separating wall 200 according to an embodiment of the present invention is installed in the cylinder 100 and separates the compression chamber 110 and the expansion chamber 150.

The separating wall portion 200 is installed inside the cylinder portion 100 and fixed to the inner peripheral surface of the cylinder portion 100 at a position near the front-rear width center of the cylinder portion 100.

The compression chamber 110 is formed in the front portion (left side in FIG. 1) of the separation wall portion 200 inside the cylinder portion 100 due to the partition portion 500 and the compression chamber 110 is formed in the rear portion of the separation wall portion 200 The expansion chamber 150 is formed.

The fluid G is filled in the compression chamber 110 and the expansion chamber 150 according to an embodiment of the present invention. Specifically, the fluid G may be formed of SF6 gas as an insulation gas.

2 through 4, the fluid regulating part 300 according to an embodiment of the present invention is openably and closably coupled to the separating wall part 200, and is configured to discharge fluid from the compression chamber 110 to the expansion chamber 150, (G).

Referring to FIG. 2, the fluid regulator 300 includes a first regulator 310 and a second regulator 350. The first regulating part 310 is installed on one side of the separating wall part 200 facing the first compression chamber part 111 and the second regulating part 350 is provided on the side of the separating wall part 200 facing the first compression chamber part 111, And is installed on the other side of the wall portion 200.

Accordingly, the pressure at which the first adjusting part 310 and the second adjusting part 350 are opened can be set differently, and the cylinder part 100 is moved to the piston part 400 side (left side in FIG. 2 reference) The first regulating part 310 and the second regulating part 350 can be opened with a time difference when the first compression chamber part 111 and the second compression chamber part 113 are compressed.

Specifically, the set pressure value of the first adjuster 310 is set to be smaller than the set pressure value of the second adjuster 350.

The cylinder portion 100 and the separating wall portion 200 move toward the piston portion 400 side (left side in FIG. 2, right side), and the compression chamber 110, that is, the first compression chamber portion 111, The internal pressure of the chamber part 113 is raised and the first compression chamber part 111 first reaches the set pressure value and the first adjustment part 310 is opened first.

The high pressure fluid G is first introduced into the expansion chamber 150 and mixed with the fluid G in the expansion chamber 150 and then the internal pressure of the second control section 350 is adjusted to a set value The refrigerant can be secondarily introduced into the expansion chamber 150 to improve the cooling performance.

In addition, since the compression chamber 110 is formed as a single space, the pressure for opening and closing the fluid regulator 300 is set differently, and the fluid G is sequentially discharged from the compression chamber 110 to the expansion chamber 150 There is an effect that can be introduced.

In the present invention, the set pressure value of the first adjuster 310 is formed to be smaller than the set pressure value of the second adjuster 350. However, the present invention is not limited thereto, 1 regulating unit 310 so that the second regulating unit 350 is opened first, and so on.

The fluid regulator 300 according to an embodiment of the present invention may be formed in a valve manner. Specifically, the fluid regulating unit 300 may be formed of a pressure reducing valve and a relief valve. A configuration in which the fluid regulating unit 300 is opened and closed when the set pressure value is reached due to the elastic restoring force of the elastic member such as a spring is a driving method of a general relief valve, and a detailed description thereof will be omitted.

1 to 5, a piston 400 according to an embodiment of the present invention is disposed in the compression chamber 110 facing the separating wall portion 200 and is disposed inside the cylinder portion 100 do.

2 and 3, the piston unit 400 according to the embodiment of the present invention is fixed to the front side (left side in FIG. 1) of the cylinder unit 100.

The piston unit 400 according to an embodiment of the present invention includes a first piston unit 410 and a second piston unit 450.

The first piston portion 410 is in contact with one surface (reference upper surface in FIG. 1) of the partition portion 500 and is disposed between the partition portion 500 and the cylinder portion 100, (Refer to FIG. 1) opposite to one surface of the partition 500 that is in contact with the one piston unit 410 and is disposed between the partition unit 500 and the cylinder unit 100.

2 and 3, the first piston part 410 and the second piston part 450 are fixed to the inside of the cylinder part 100, and as the cylinder part 100 is moved, (111) and the second compression chamber (113), respectively.

Since the first piston portion 410 and the second piston portion 450 are independently partitioned by the partition portion 500, the first piston portion 410 and the second piston portion 450 are in close contact with the inner surface of the cylinder portion 100 and the partition portion 500, It is possible to prevent the fluid G from being separated from the first piston 410, the second piston 450, and the cylinder 100 or the partition 500.

The compression chamber 110 formed in the cylinder 100 has a cylindrical portion 100, a separation wall portion 200 fixed to the inner peripheral surface of the cylinder portion 100, and a piston portion 400 formed between the piston portion 400 Space.

Referring to FIGS. 1 and 5, a depressurization unit 800 to be described later is coupled to the piston unit 400 according to an embodiment of the present invention.

The pressure relief portion is openably and closably connected to the piston portion 400 and opens when the internal pressure of the compression chamber 110 is equal to or more than a predetermined value to discharge the fluid G to protect the operation device .

Referring to FIGS. 1 to 5, the partition 500 according to an embodiment of the present invention is coupled to the separating wall 200 to partition the compression chamber 110.

The compression chamber 110 is partitioned into the first compression chamber portion 111 and the second compression chamber portion 113 by the partition portion 500. Specifically,

Referring to FIG. 2, the partition 500 according to an embodiment of the present invention is formed in parallel with the longitudinal direction (left and right direction in FIG. 1) of the cylinder 100, do.

Specifically, the compression chamber 110 is partitioned into a first compression chamber section 111 and a second compression chamber section 113, thereby forming a first compression chamber section 111, a second

compression chamber section

111, 113 have the effect of compressing the fluid G with the same pressure by the piston portion 400. [

In addition, the first control part 310 and the second control part 350 installed to face the compression chamber 110, specifically, the first compression chamber part 111 and the second compression chamber part 113, respectively, The pressure setting values for the compression chamber 110 and the compression chamber 110 are independently set so that the cylinder unit 100 and the separating wall unit 200 move to the piston unit 400 side So that the fluid G can be introduced into the expansion chamber 150 from the first compression chamber portion 111 and the second compression chamber portion 113.

The compartment 500 according to one embodiment of the present invention penetrates the piston 400 so that the piston 400 moves along the compartment 500 to the compression chamber 110, So that the fluid (G) inside the first compression chamber (111) and the second compression chamber (113) is compressed.

6, the pressure measuring unit 600 according to an exemplary embodiment of the present invention may measure the internal pressure of the compression chamber 110 and the expansion chamber 150, specifically, the internal pressure of the compression chamber 110 and the expansion chamber 150 And is installed in the cylinder part 100 by measuring the pressure difference.

The pressure measuring unit 600 according to an embodiment of the present invention measures the internal pressure of the compression chamber 110 and the expansion chamber 150 or the pressure difference between the compression chamber 110 and the expansion chamber 150, When the pressure difference between the expansion chamber 110 and the expansion chamber 150 reaches a predetermined range, the fluid regulator 300 is opened and closed to open and close the fluid regulator 300, specifically, the first regulator 310 and the second regulator 350, Can be controlled.

Referring to FIG. 6, the controller 700 receives information on the internal pressures of the compression chamber 110 and the expansion chamber 150 from the pressure measurement unit 600.

The controller 700 according to an embodiment of the present invention includes a first controller 310 and a second controller 320 so that the first controller 310 and the second controller 320 may be opened / .

The control unit 700 controls the first compression chamber unit 111 and the second compression chamber unit 300 to independently open and close the fluid regulating unit 300, specifically, the first regulating unit 310 and the

second regulating unit

350, 113 can be adjusted.

1 and 5, the depressurization unit 800 according to an embodiment of the present invention is installed in the piston unit 400 and is configured to control the internal pressure of the compression chamber 110, specifically, If the set value is exceeded, there is an effect that the operator or the shielding device itself can be protected by discharging the fluid G while being opened.

In the present invention, the depressurization unit 800 is installed in the first piston unit 410 facing the first compression chamber unit 111, but not limited thereto, and the second compression chamber unit 113, A plurality of first compression chamber units 111 and a plurality of second compression chamber units 113 are provided in the first piston unit 410 and the second piston unit 450 so as to face the first compression chamber unit 111 and the second compression chamber unit 113, And can be independently opened and closed.

The operation principle and effect of the gas-shutoff apparatus 1 of the above-described construction will be described.

Referring to FIGS. 1 and 2, when a failure occurs in the power system, the fixed arc contact 10 and the movable arc contact 20 (not shown) are removed by an actuator (not shown) connected to the cylinder 100, , The cylinder portion 100 is moved to the piston portion 400 side (left side in FIG. 1 reference right).

As a result, as the cylinder part 100 moves, the fluid G in the compression chamber 110 is compressed by the piston part 400.

In addition, the fixed arc contact 10 and the movable arc contact 20 are separated, and at the same time an arc is generated between the fixed arc contact 10 and the movable arc contact 20.

In this case, if the pressure of the fluid G in the compression chamber 110 is higher than the pressure of the fluid G in the expansion chamber 150, the fluid control unit 300 coupled to the separation wall unit 200 is opened, G passes through the fluid regulating part 300 and is injected between the fixed arc contact 10 and the movable arc contact 20 through the expansion chamber 150 and the nozzle part 30.

As a result, the arc generated between the fixed arc contact 10 and the movable arc contact 20 is extinguished by the gas compressed in the compression chamber 110, so that the fault current is cut off.

The high temperature fluid G generated due to the arc generated between the fixed arc contact 10 and the movable arc contact 20 passes between the nozzle portions 30 and flows into the expansion chamber 150. The high temperature fluid G flowing through the expansion chamber 150 and the high pressure fluid G flowing from the compression chamber 110 are mixed and cooled.

Referring to FIG. 2, as the cylinder 100 moves to the piston 400 side (left side in FIG. 2), the compression chamber 110, specifically, the first compression chamber portion 111, When the pressure of the fluid G in the chamber part 113 is increased and the pressure value set in the first control part 310 is reached, the first control part 310 is opened.

The fluid G in the first compression chamber portion 111 flows into the expansion chamber 150 and is mixed with the high temperature fluid G inside the expansion chamber 150.

3, the pressure of the internal fluid G of the second compression chamber portion 113 is further increased as the cylinder 100 moves to the piston 400 side (left side in FIG. 3) And when the pressure reaches the pressure value set to a value larger than the pressure value set to the first adjuster 310, the second adjuster 350 is opened.

The fluid G in the second compression chamber 113 flows into the expansion chamber 150 and is mixed with the high temperature fluid G inside the expansion chamber 150.

1 to 3, the partition 500 is coupled to the separating wall 200 and is disposed in parallel with the longitudinal direction of the cylinder 100, ) Are partitioned in parallel.

Since the first compression chamber portion 111 and the second compression chamber portion 113 are formed by the partitioning portion 500 and the first and

second control portions

310 and 350 are opened The pressure value can be set differently.

In addition, the first regulating unit 310 and the second regulating unit 350 are sequentially opened at the required time to fluidize the fluid G in the compression chamber 110 into the expansion chamber 150.

The first regulating part 310 and the second regulating part 350 are sequentially opened in accordance with the pressure and the fluid G is moved in the expansion chamber 150 and the high temperature fluid G and the first compression chamber part 111), the fluid G to be cooled in the second compression chamber part 113 is mixed and the arc generated between the fixed arc contact 10 and the movable arc contact 20 is extinguished, and the heat generated from the arc is cooled There is an effect that can be made.

6, the internal pressure of the compression chamber 110 and the expansion chamber 150, specifically, the pressure difference between the compression chamber 110 and the expansion chamber 150 can be measured by the pressure measurement unit 600 The control unit 700 receives the information about the internal pressures of the compression chamber 110 and the expansion chamber 150 from the pressure measurement unit 600 and controls the fluid control unit 300 and specifically the first control unit 310 The first control unit 310 and the second control unit 350 can be independently controlled to be opened and closed while the second control unit 350 is opened and closed when the preset pressure value is reached.

Referring to FIG. 5, when the pressure reducing portion 800 is opened when the pressure of the compression chamber 110 exceeds a predetermined value, the fluid G in the compression chamber 110 is discharged to the outside, , It is possible to prevent the gas recirculation system 1 from being damaged.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the technical scope of the present invention should be defined by the following claims.

Claims

A cylinder portion in which a compression chamber and an expansion chamber are formed;

A separating wall portion provided in the cylinder portion and partitioning the compression chamber and the expansion chamber;

A fluid regulating portion that is openably and closably connected to the separating wall portion and regulates the flow of the fluid from the compression chamber to the expansion chamber;

A piston portion facing the separating wall portion and disposed in the compression chamber;

And a partitioning portion coupled to the separating wall portion and partitioning the compression chamber.
The method according to claim 1,

Wherein the partition is formed in parallel with the longitudinal direction of the cylinder, and the compression chamber is partitioned in parallel.
3. The method of claim 2,

Wherein the compression chamber is partitioned by the partition into a first compression chamber portion and a second compression chamber portion.
The method of claim 3,

Wherein the piston portion includes: a first piston portion for pressing the first compression chamber portion by the partition portion; And

And a second piston portion for pressing the second compression chamber portion.
The method of claim 3,

Wherein the fluid regulating portion includes:

A first adjusting unit installed at one side of the separating wall facing the first compression chamber; And

And a second control unit installed on the other side of the partition wall facing the second compression chamber unit.
6. The method of claim 5,

Further comprising a control unit for controlling the driving of the first adjusting unit and the second adjusting unit such that the first adjusting unit and the second adjusting unit are opened or closed at different times.