KR20170106838A - Extinguishing Unit of High Voltage Gas Circuit Breaker using PASB(Puffer-Assisted Self-Blast) - Google Patents

Abstract

The present invention relates to an extinguishing part of a high voltage circuit breaker with a puffer-assisted self-blast (PASB) method. More specifically, the present invention relates to an extinguishing part of a high voltage circuit breaker with a PASB method which increases a mixing efficiency by increasing a residence time of cooling gas and thermal gas in a cooling cylinder. According to an embodiment of the present invention, the extinguishing part of a high voltage circuit breaker with a PASB method comprises: a fixing part enclosure providing a fixing part cooling cylinder at an end part; a driving part enclosure located so as to face a predetermined gap at the fixing part enclosure, and providing a driving part cooling cylinder at the end part; a fixing arc contact installed in the fixing part enclosure; a cylinder rod installed to linearly move in the fixing part enclosure and the driving part enclosure; a cylinder installed on the outside of the cylinder rod, and forming a pressure chamber and an expansion chamber; and a driving arc contact installed at the end part of the cylinder rod. The extinguishing part of a high voltage circuit breaker with a PASB method arranges a first discharging hole formed in the fixing part cooling cylinder, a second discharging hole formed in the fixing part enclosure, and third and fourth discharging holes formed in the driving part cooling cylinder.

Description

(Exhausting Unit of High Voltage Gas Circuit Breaker using PASB (Puffer-Assisted Self-Blast)

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a superhigh-voltage circuit breaker of a composite super-high-pressure type, and more particularly, will be.

Generally, a gas circuit breaker or a gas insulated switchgear is installed between a power supply side and a load side of an electric system to safely shut off the current when an abnormal current such as a ground fault or a short circuit occurs on the circuit Electric equipment to protect power system and load equipment is mainly used for high voltage (high voltage). Therefore, the gas circuit breaker should maintain the current carrying capacity and insulation performance to operate the rated current and the rated voltage in the normal state, and to prevent the fault current in the abnormal state.

The gas circuit breaker is roughly divided into a puffer type and a puffer-assisted self-blast (PASB) type depending on the configuration of the cut-off portion (a small portion) and the cut-off method. In the purging method, a compression chamber is provided in such a manner that the arc is extinguished by the compressed heat gas. In the composite quenching type, a compression chamber and an expansion chamber are provided with a blocking system in which a conventional purging system and a thermal expansion system are mixed.

FIG. 1 shows a moving part and a fixing part of a composite super high pressure gas circuit breaker according to the prior art.

Generally, the soot portion of the gas circuit breaker is composed of a fixed portion on the right side in the drawing and a movable portion on the left side in the drawing. The fixed portion is composed of the fixed unit main body 1, the fixed main contact 2, the fixed arc contact 3 and the cooling chamber 4 and the movable portion includes the movable portion enclosure 5, the cylinder rod 5a, A main nozzle 6, an auxiliary nozzle 7, a movable arc contact 8, a movable main contact 9, and the like. Here, the stationary unit housing 1 and the movable unit housing 5 are installed to support the stationary portion and the movable portion, respectively.

When a fault current is generated in the system, the movable part receives the power of the driving part (not shown), and the main contact and the arc contact are disconnected as the cylinder rod 5a moves backward. FIG. 2 shows the interruption action of the conventional super high pressure gas circuit breaker according to the prior art. The arc generated at the arc contact is converted into a thermal gas and flows into the cooling chamber through the flow path.

An arc is generated between the movable arc contact (8) and the fixed arc contact (4) when the fault current of the gas circuit breaker is cut off. When an arc is generated between the arc contacts, the arc energy causes the nozzle to be sputtered, and a high stagnation pressure in the vicinity of the nozzle generates a thermal gas. The heat gas heated by this arc enters the expansion chamber A via the compression chamber B and raises the pressure of the expansion chamber. When the current is zero, the gas in the expansion chamber (A) is injected and the arc is extinguished. At this time, the heat gas converted to the high temperature / high pressure flows to the cooling chamber 4 of the fixed section through the flow path between the auxiliary nozzle 7 and the main nozzle 6 and is cooled, and a part thereof flows into the movable part. The hot gas moved to the cooling chamber is mixed with the cooling gas in the cooling chamber, and the temperature is discharged through the discharge holes 4a and 5c while the pressure decreases. At this time, if gas of high temperature and high pressure flows out directly to the tank (not shown) surrounding the circuit breaker, grounding phenomenon may occur between the ground.

In the end region D of the cooling chamber 4 of the fixed portion and the end region C of the movable portion enclosure 5, a so-called dead volume in which only the hot gas can not reach the hot gas is generated .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a soot portion of a composite super high pressure circuit breaker which increases a residence time of a cooling gas and a thermal gas in a cooling cylinder to increase mixing efficiency.

The low-pressure super-high-pressure circuit breaker according to an embodiment of the present invention includes a fixed portion enclosure having a fixed-portion cooling pipe at a terminal end thereof; A movable part enclosure which is located opposite to the fixed part enclosure with a predetermined gap therebetween and has a movable part cooling compartment at a terminating part; A fixed arc contact installed inside the fixture housing; A cylinder rod installed in the fixed casing and the movable casing so as to be linearly movable; A cylinder provided outside the cylinder rod to form a compression chamber and an expansion chamber; And a movable arc contact provided at a longitudinal end of the cylinder rod, wherein the movable member includes a first discharge hole formed in the fixed portion cooling cylinder, a second discharge hole formed in the fixed portion casing, 3, and a fourth discharge hole.

The apparatus may further include a heating gas guide installed in the fixing unit casing or the fixing unit cooling tube to guide the arc generated in the blocking to the rear end of the fixing unit cooling tube.

In addition, the first discharge hole is formed at the outermost side of the fixed-portion cooling cylinder, and the second discharge hole is formed in the fixed-portion housing.

In addition, the third discharge hole is formed at the outermost side of the moving part cooling drum, and the fourth discharge hole is formed at the innermost side of the moving part cooling drum.

In addition, the first, second, third, and fourth discharge holes are each provided with a mesh network.

In addition, the mesh net can be adjusted in the amount of gas discharged by adjusting the hole size.

A gas dispersion part having an inclined surface is protruded and formed on the shaft center part of the fixing part cooling tube so that the heat gas exiting the thermal gas guide can be dispersed to the outside.

According to an embodiment of the present invention, a plurality of discharge holes are formed in the fixed portion and the movable portion, so that the hot gas and the cold gas are mixed smoothly during the interruption.

In addition, since the flow of air to the outside increases, the flow path through which the hot gas flows in the cooling tube increases, thereby increasing the mixing time of the hot gas and the cold gas.

In addition, there is an effect that the dead volume inside the cooling cylinder is reduced.

As a result, the phenomenon of insulation breakdown from the ground by the sudden outflow of the thermal gas is reduced. Meanwhile, there is an effect that the discharge amount can be controlled by adjusting the mesh size of the mesh net disposed in the discharge hole.

1 is a longitudinal sectional view of a conventional super high pressure gas circuit breaker according to the prior art.
2 is a block diagram of a conventional super high pressure gas circuit breaker according to the prior art.
3 is a vertical cross-sectional view of a small portion of a composite super high voltage circuit breaker according to an embodiment of the present invention.
FIG. 4 is a diagram illustrating the operation of the small-diameter portion of the composite super-high-pressure type circuit breaker according to the embodiment of the present invention, in which the thermal gas flows into the thermal expansion chamber.
FIG. 5 is a view illustrating the operation of the low pressure section of the supercharged super high pressure circuit breaker according to the embodiment of the present invention, in which the thermal gas is mixed with the cold gas in the thermal expansion chamber.
FIG. 6 is a view illustrating the operation of the small-sized super high-pressure circuit breaker according to the embodiment of the present invention, in which the thermal gas in the thermal expansion chamber is injected into the arc region between the gaps.

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

3 is a vertical cross-sectional view of a small portion of a composite super high voltage circuit breaker according to an embodiment of the present invention. Referring to the drawings, a description will be made in detail of an ashing part of a composite super high voltage circuit breaker according to each embodiment of the present invention.

The low pressure portion of the composite super high pressure circuit breaker according to an embodiment of the present invention includes a fixing portion housing 10 having a fixing portion cooling tube 11 at a terminal end thereof; A movable part enclosure (30) located opposite to the fixed part enclosure (10) at a predetermined interval and provided with a movable part cooling container (31) at a terminating part; A stationary arc contact 21 installed inside the fixture enclosure 10; A cylinder rod 41 installed to be linearly movable in the fixed unit housing 10 and the movable unit housing 30; A cylinder (42) provided outside the cylinder rod (41) and forming a compression chamber (A) and an expansion chamber (A); And a movable arc contact 43 provided at a terminating end of the cylinder rod 41. The first discharge hole 12 formed in the fixed-portion cooling cylinder 11 and the first discharge hole 12 formed in the fixed- And a third and fourth discharge holes 32 and 33 formed in the movable part cooling tube 30 are provided.

The composite super high voltage circuit breaker according to one embodiment of the present invention can be largely composed of a movable part installed on the left side in the drawing and a fixed part installed on the right side in the drawing.

The movable portion includes a main nozzle 44, an auxiliary nozzle 45, a movable main contact 46, a movable arc contact 43, a cylinder 42, a cylinder rod 41, and the like.

The movable section enclosure 30 is formed as a cylindrical enclosure. The movable part enclosure 30 constitutes the external shape of the movable part and serves to support internal components.

A cylinder rod 41 is provided along the axial center of the movable section enclosure 30. [ The cylinder rod 41 is connected to the movable rod 47 and moves forward and backward by the power of a driving unit (not shown).

A cylinder 42 is coupled to the cylinder rod 41 and slidably installed inside the movable part enclosure 30. An end plate 42a is provided or formed at the tip of the cylinder 42 and a middle plate 42b is formed or formed at the center in the longitudinal direction. Holes are formed in the middle plate 42b so that gas can flow. The space between the end plate 42a and the middle plate 42b constitutes the compression chamber B and the space below the middle plate 42b constitutes the expansion chamber A. [

The movable main contact 46 is coupled to the outside of the end plate 42a of the cylinder 42. [ When the movable main contact 46 contacts the fixed main contact 22, the main current is energized.

The main nozzle 44 is coupled to the inner peripheral surface of the end plate 42a and the movable main contact 46 of the cylinder 42. [ The main nozzle 44 creates a flow path of the arc that occurs during the interruption. The arc is diffused along the flow path formed inside the main nozzle 44 together with the soot gas injected from the expansion chamber A formed in the cylinder 42 and is formed at the end portion of the fixed section enclosure 30 And cooled in the fixed-portion cooling cylinder 11.

Inside the cylinder 42, an auxiliary nozzle 45 may be provided to form a flow path from the expansion chamber A to the neck of the main nozzle 44. The auxiliary nozzle 45 may be provided outside the movable arc contact 43.

The movable arc contact 43 is coupled to the end of the cylinder rod 41. The movable arc contact 43 is connected to the fixed arc contact 21 when energized to energize the current, and when the current is interrupted, the movable arc contact 43 is disconnected later than the main contact to generate an arc.

A third discharge hole (32) and a fourth discharge hole (33) are formed in the movable part cooling tube (31). Here, the third discharge hole 32 is formed at the outermost side (left side in the figure) of the movable part cooling tube 31, and the fourth discharge hole 33 is formed at the innermost side of the movable part cooling tube 31 . That is, the third discharge hole 32 is located at the end of the moving part cooling tube 31 so that the hot gas can be moved as far as possible and mixed with the cold gas. In addition, the third discharge hole 32 and the fourth discharge hole 33 are formed to be sufficiently spaced from each other so that mixing can be easily performed in the entire movable part cooling cylinder 31. In addition, two discharge holes are formed on the side of the movable part so as to smoothly flow with the outside air to help the discharge of the gas, and to allow the gas to be mixed well in the movable part cooling cylinder (31). The air can flow from the outside into the movable part cooling chamber 31 through the third discharge hole 32 and flow out to the outside through the fourth discharge hole 33. Therefore, the air flow inside the movable part cooling chamber 31 It becomes smooth (of course, the opposite direction is also possible).

The stationary housing 10 is formed in the form of a cylinder. A fixed main contact (22) is provided at the tip of the fixed housing (10).

A fixed arc contact 21 is provided in the fixed enclosure 10 along the central axis. Thermal gas flows around the fixed arc contact (21).

At the end of the fixed housing 10, a fixed-portion cooling cylinder 11 is provided. The stationary cooling compartment (11) is provided outside the fixed compartment (10). Depending on the embodiment, the fixed-portion cooling cylinder 11 may be integrally formed with the fixed-portion housing 10. In the fixing unit cooling tube 11, the hot gas generated during the shutdown is mixed with the cold gas.

The hot gas guide 25 may be provided in the interior of the stationary cooling chamber 11. The thermal gas guide 25 is formed into a cylindrical shape. The hot gas guide 25 may have a wide inlet side and a narrow outlet side. The hot gas guide 25 serves to allow the hot gas and the high-pressure heat generated during the shutoff to flow to the rear end of the fixed-portion cooling tube 11, thereby mixing well with the cold gas. The thermal gas guide 25 may be provided with a plurality of gas holes 26 on its side surface.

The gas dispersion unit 14 having the inclined surface 15 may be protruded from the center of the shaft of the fixing unit cooling tube 11 so that the thermal gas exhausted from the thermal gas guide 25 may be dispersed to the outside. The gas dispersion portion 14 may be formed to have a conical shape and have a sloped surface 15. The hot gas generated at the time of interruption reaches the rear end of the fixing section cooling tube 11 through the fixing section 10 and the thermal gas guide 25. At this time, The dispersed portion 14 spreads the thermal gas to the outside and mixes well with the cold gas.

A first exhaust hole 12 is formed in the fixed cooling unit 11 and a second exhaust hole 13 is formed in the fixed unit 10. And the heat gas escapes through the first discharge hole 12 and the second discharge hole 13 to the outside.

Here, the first discharge hole 12 is formed at the outermost side (right side in the drawing) of the fixed-portion cooling cylinder 11, and the second discharge hole 13 can be formed in the fixed- have. That is, the first discharge hole 12 is positioned at the outermost portion of the fixed-portion cooling cylinder 11 so that the hot gas can be moved as far as possible and mixed with the cold gas. Further, the first discharge hole 12 and the second discharge hole 13 are formed to have a sufficient distance, so that mixing can be easily performed in the entire fixed-portion cooling cylinder 11. In addition, two discharge holes are formed on the fixed portion side to smooth out the flow with the outside air to help the discharge of the gas, and to allow the gas to be mixed well in the fixed portion cooling container 11. [ Air can flow from the outside through the first discharge hole 12 into the fixed-portion cooling cylinder 11 and then flow out to the outside through the second discharge hole 13. Therefore, the air inside the fixed-portion cooling cylinder 11 The flow is smooth (of course, the opposite direction is also possible).

Each of the first, second, third, and fourth discharge holes 12, 13, 32, and 33 may be provided with a mesh network. Here, as the hole size of the mesh network changes, the discharge amount of the thermal gas can be controlled. That is, it is possible to control the amount of discharged gas by adjusting the hole size of the mesh net of the first discharge hole 12 and the second discharge hole 13 at the fixing portion. In addition, the amount of discharged gas can be adjusted by adjusting the hole size of the mesh net of the third discharge hole 32 and the fourth discharge hole 33 in the movable part.

Referring to FIGS. 4 to 6, the operation of shutting down the composite super high voltage circuit breaker according to the embodiment of the present invention will be described. Fig. 4 shows a state in which the thermal gas flows into the thermal expansion chamber as an initial state of interruption. Fig. 5 shows a state in which the thermal gas is mixed with the cold gas in the thermal expansion chamber as a state during the cutting process. Fig. 6 shows a state in which the thermal gas in the thermal expansion chamber is injected into the arc region between the gaps as a break-late state.

Referring to FIG. 4, the arc of the main nozzle 44 is accompanied by the arc generated between the movable arc contact 43 and the fixed arc contact 21 at the time of interruption, and the main nozzle 44 and the auxiliary nozzle 45 Due to the high stagnation pressure between the compression chamber A and the expansion chamber A, the heat gas enters the expansion chamber A through the compression chamber A. [ Referring to FIG. 5, the heat gas is mixed with the existing cold gas in the expansion chamber A, and the internal pressure of the expansion chamber A is increased. Referring to FIG. 6, when the current is zero, the high-pressure gas compressed in the expansion chamber A is injected into the arc region through the flow path between the main nozzle 44 and the auxiliary nozzle 45. The gas injected from the expansion chamber 54 is converted into a high-temperature, high-pressure heat gas. The hot gas is diffused through the flow path between the auxiliary nozzle 45 and the main nozzle 44 and flows to the rear end of the fixed-portion cooling tube 11 through the thermal gas guide 25, And the second discharge hole (13). In other words, the corpse is reduced. At this time, the gas discharge hole is composed of the first discharge hole 12 and the second discharge hole 13, and the outside air enters into the first discharge hole 12 to make an air flow to the second discharge hole 13 So that the gas can be smoothly discharged. In addition, when only one discharge hole is conventionally formed, there is an effect that the ground fault, which may be caused by the sudden discharge of the arc gas, is reduced through the dispersion discharge.

According to an embodiment of the present invention, a plurality of discharge holes are formed in the fixed portion and the movable portion, so that the hot gas and the cold gas are mixed smoothly during the interruption.

In addition, since the flow of air to the outside increases, the flow path through which the hot gas flows in the cooling tube increases, thereby increasing the mixing time of the hot gas and the cold gas.

In addition, there is an effect that the dead volume inside the cooling cylinder is reduced.

As a result, the phenomenon of insulation breakdown from the ground by the sudden outflow of the thermal gas is reduced. Meanwhile, there is an effect that the discharge amount can be controlled by adjusting the mesh size of the mesh net disposed in the discharge hole.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the scope of the present invention but to limit the scope of the technical idea of the present invention. 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 Fixing section enclosure 11 Fixed cooling unit
12 first discharge hole 13 second discharge hole
14 gas dispersion part 15 inclined surface
21 Fixed arc contact 22 Fixed main contact
25 Heat gas guide 26 Gas hole
30 Movable part enclosure 31 Movable part cooling chamber
32 Third discharge hole 33 Fourth discharge hole
41 cylinder rod 42 cylinder
42a end plate 42b middle plate
43 movable arc contact 44 main nozzle
45 auxiliary nozzle 46 movable main contact

Claims (7)

A fixed section enclosure having a fixed section cooling tube at its end;
A movable part enclosure which is located opposite to the fixed part enclosure with a predetermined gap therebetween and has a movable part cooling compartment at a terminating part;
A fixed arc contact installed inside the fixture housing;
A cylinder rod installed in the fixed casing and the movable casing so as to be linearly movable;
A cylinder provided outside the cylinder rod to form a compression chamber and an expansion chamber;
And a movable arc contact provided at a terminating end of the cylinder rod,
A first exhaust hole formed in the fixing portion cooling tube, a second exhaust hole formed in the fixing portion housing, and a third and a fourth exhaust hole formed in the moving portion cooling tube. Loop of the breaker. The refrigerator according to claim 1, further comprising a thermal gas guide installed inside the fixing unit casing or the fixing unit cooling tube to guide the arc generated during the blocking to the rear end of the fixing unit cooling cylinder, Loop of the breaker. The small-diameter portion of the composite super high pressure circuit breaker according to claim 1, wherein the first discharge hole is formed at the outermost side of the fixed-portion cooling cylinder, and the second discharge hole is formed in the fixed portion housing. The high-pressure circuit breaker according to claim 1, wherein the third discharge hole is formed at the outermost side of the moving part cooling cylinder and the fourth discharge hole is formed at the innermost side of the moving part cooling cylinder part. [3] The low noise circuit breaker of claim 1, wherein the first, second, third, and fourth discharge holes are each provided with a mesh network. [6] The low noise amplifier of claim 5, wherein the mesh size of the mesh network is controlled to control the amount of gas discharged. 3. The super high pressure circuit breaker according to claim 2, wherein a gas dispersion part having an inclined surface is protruded and formed on the shaft center part of the fixing part cooling tube so that heat gas escaping from the thermal gas guide can be dispersed to the outside Soho Department.

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