Circuit breaker

Abstract

The present invention relates to a circuit breaker comprising: a fixed unit having a fixed arc contact point, including an outer fixed housing and an inner fixed housing, and including a fixed housing having a discharge channel formed therein to discharge high-temperature gas; a movable unit in which a cylinder rod configured to receive driving power from a movable rod and a cylinder unit connected to the cylinder rod are provided such that the cylinder unit reciprocates forwards / backwards and is electrically connected to the fixed unit or is separated therefrom, a movable arc point being provided to selectively contact the fixed arc contact point, and a discharge channel being provided in the movable unit to discharge high-temperature gas; and induction blade units provided in the discharge channels of the fixed unit and the movable unit, respectively, to induce metal vapor or discharge gas in a predetermined shape or direction. The present invention is advantageous in that, when heat gas generated in a process in which the circuit breaker blocks a fault current is discharged to the outside, the length of the channel is increased by the channel guide unit, and the increased channel length lengthens the cooling time. Accordingly, the discharged heat gas can be cooled more easily, and the metal vapor contained in the discharged heat gas is filtered out by a movement limiting unit or a collection vessel unit when moving along the flow of the heat gas, thereby preventing a ground fault blocking failure in advance.

Description

crossing gate

[0001] The present invention relates to a circuit breaker, and more specifically, to a composite arc-extinguishing or puffer-type circuit breaker.

[0002] Generally, circuit breakers are used to interrupt fault currents and protect power equipment in the event of a fault in a power system.

[0003] The operating principle and device configuration for extinguishing an arc generated by a fault current between two electrical contacts in a conventional ultra-high voltage circuit breaker are explained as follows.

[0004] Basically, when an arc caused by a fault current occurs while the insulating gas is charged at high pressure inside the circuit breaker, the insulating gas is compressed to a very high pressure and forcefully sprayed directly onto the arc to extinguish it.

[0005] Ultra-high voltage circuit breakers are broadly classified into Puffer Type and Hybrid Type depending on the method of extinguishing the arc, and gas circuit breakers of the Hybrid Type are typically configured to include two chambers, such as a Compress Chamber and a Thermal Chamber.

[0006] In a composite arc-extinguishing circuit breaker of this configuration, when a fault occurs in the power system, the movable part moves around the fixed part, and during the movement of the movable part, the gas in the compression chamber is automatically compressed by a fixed-position piston.

[0007] In addition, as the movable part moves, the fixed arc contact and the movable arc contact separate, and an arc is generated between the two arc contacts.

[0008] At this time, if the gas pressure in the compression chamber is higher than the gas pressure in the thermal expansion chamber, the check valve provided on the middle plate opens, and the gas compressed in the compression chamber is injected between the fixed arc contact and the movable arc contact through the thermal expansion chamber and the main nozzle.

[0009] Accordingly, the fault current can be interrupted as the arc generated between the two arc contacts is extinguished by the compressed gas in the compression chamber.

[0010] At this time, as the arc temperature reaches tens of thousands of degrees, the gas surrounding the arc expands due to the high temperature and flows back into the thermal expansion chamber; when the pressure in the thermal expansion chamber becomes higher than that in the compression chamber due to the backflowing gas, the check valve closes.

[0011] The gas that flows back into the thermal expansion chamber mixes with the cold gas in the thermal expansion chamber, and the cooled gas is injected into the arc between the fixed arc contact and the movable arc contact to extinguish the arc.

[0012] During this process, if the pressure in the compression chamber is high, mechanical pressure may be applied to the circuit breaker itself; therefore, when the pressure in the compression chamber exceeds a certain level, the pressure reducing valve of the piston opens to expel the gas from the compression chamber to the rear, thereby regulating the pressure in the compression chamber.

[0013] In other words, when the magnitude of the fault current is small, the arc is extinguished by the compressed gas in the compression chamber to interrupt the fault current; however, when the fault current is large, the arc energy generated between the fixed arc contact and the movable arc contact is used to expand the surrounding gas and cause it to flow back into the thermal expansion chamber. Then, the gas that has been cooled and compressed in the thermal expansion chamber is injected again to extinguish the arc and interrupt the fault current.

[0014] Meanwhile, in the case of a general power system, since it is alternating current, there is a point where the current becomes "0", and at this time, the gas that was filled at high pressure in the thermal expansion chamber (10) is injected between the fixed arc contact and the movable arc contact to extinguish the arc.

[0015] With this, insulation performance is restored, and it is said that the blockage was successful.

[0016] Ultimately, during the process where the circuit breaker interrupts the fault current, the temperature of the insulating gas rises due to arc energy, and the arc contacts are fused, generating metal vapor.

[0017] The hot gas and metal vapor generated as a result are discharged outside the circuit breaker along the gas flow, but if the hot gas does not cool sufficiently or the amount of metal vapor increases, there is a problem that ground fault interruption failure occurs.

[0018] [Prior Art Literature]

[0019] [Patent Literature]

[0020] (Patent Document 1) KR 10-1040592 B1

[0021] The present invention is intended to solve the conventional problems described above, and the objective of the present invention is to provide a circuit breaker for cooling exhausted hot gas and reducing metal vapor.

[0022] To achieve the objectives of the present invention as described above, a circuit breaker according to one embodiment of the present invention may further comprise: a fixed part including a fixed housing formed of an outer fixed housing and an inner fixed housing, wherein a fixed arc contact is provided and an exhaust passage for discharging high-temperature gas is formed on the inside; a movable part having a cylinder part connected to a cylinder rod that receives driving force from a movable rod inside, wherein the cylinder part reciprocates back and forth and is electrically connected to and disconnected from the fixed part and selectively contacts the fixed arc contact, and an exhaust passage for discharging high-temperature gas is formed on the inside; and a guide vane part provided in the exhaust passage of each of the fixed part and the movable part to guide metal vapor or exhaust gas in a predetermined shape or direction.

[0023] In a circuit breaker according to one embodiment of the present invention, a flow guide portion may be further included, which is extended or connected along the longitudinal direction of the fixed arc contact from one side of the inner fixed housing, or is extended or connected along the longitudinal direction of the cylinder rod from the cylinder, and extends the length of the discharge flow path through which the expanded high-temperature gas is discharged.

[0024] In a circuit breaker according to one embodiment of the present invention, the movable part includes a rod support part that forms a through hole through which the cylinder rod passes and supports the cylinder rod by contacting the outer surface of the cylinder rod; and the guide wing part may be installed on the surface facing the flow guide part of the rod support part.

[0025] In a circuit breaker according to one embodiment of the present invention, the fixing part includes a fixing support member that fixes and supports the fixed arc contact around the fixed arc contact; and the induction wing part may be installed on the surface of the fixing support member facing the flow guide part.

[0026] In a circuit breaker according to one embodiment of the present invention, the induction vane portion may be formed so that metal vapor or exhaust gas passing through the induction vane portion is rolled and obtains centrifugal force.

[0027] In a circuit breaker according to one embodiment of the present invention, the induction wing portion may further include a wing that is obliquely provided along the longitudinal direction of the cylinder rod on the cylinder rod or the rod support portion with the cylinder rod as the central axis.

[0028] In a circuit breaker according to one embodiment of the present invention, the induction wing portion may further include a wing obliquely provided along the longitudinal direction of the fixed arc contact on the outer side of the fixed arc contact or on the outer side of the fixed support member with the fixed arc contact as the central axis.

[0029] In a circuit breaker according to one embodiment of the present invention, the induction wing portion may further include: a first wing obliquely provided along the longitudinal direction of the central axis on the outer side of the central axis; and a second wing obliquely provided along the longitudinal direction of the central axis on the outer side of the central axis and provided in conjunction with the first wing.

[0030] In a circuit breaker according to one embodiment of the present invention, a movement limiting part provided in the flow guide part and restricting the movement of metal powder or metal residue contained in metal vapor or exhaust gas in which centrifugal force is formed by passing through the guide wing part may be further included.

[0031] In a circuit breaker according to one embodiment of the present invention, the movement limiting part may have a cross-section along the longitudinal direction of the flow guide part formed as an irregularity.

[0032] In a circuit breaker according to one embodiment of the present invention, the movement limiting part may have a cross-section formed along the longitudinal direction of the flow guide part formed as a polygon or at least one surface formed as a curved surface.

[0033] In a circuit breaker according to one embodiment of the present invention, the movement limiting part may be provided in a donut shape on the inner surface of the flow guide part.

[0034] In a circuit breaker according to one embodiment of the present invention, the circuit breaker may further include a collection container portion provided in the flow guide portion in a container shape that is open in the opposite direction of the flow path and collects metal powder or metal residue contained in metal vapor or exhaust gas that has centrifugal force formed by passing through the guide wing portion.

[0035] In the present invention, when a circuit breaker discharges hot gas generated during the process of interrupting a fault current to the outside, the length of the flow path is increased by the flow path guide, and the increased length of the flow path provides more cooling time, thereby allowing the discharged hot gas to be cooled more easily.

[0036] In addition, the present invention has the effect of preventing ground fault interruption failure in advance because metal vapor contained in the discharged hot gas is filtered by a movement restriction part or a collection container part as it moves along the flow of the hot gas.

[0037] Figure 1 is a schematic cross-sectional view of a conventional circuit breaker.

[0038] FIG. 2 is a cross-sectional view schematically showing a circuit breaker according to an embodiment of the present invention.

[0039] FIG. 3 is a schematic perspective view showing the induction wing portion of a circuit breaker according to an embodiment of the present invention.

[0040] Figures 4 (a) and (b) are schematic perspective views of other embodiments of Figure 3.

[0041] FIG. 5 is a schematic diagram showing a movement limiting part installed on a fixed part of a circuit breaker according to an embodiment of the present invention.

[0042] FIG. 6 is a schematic diagram showing a movement limiting part installed on a movable part of a circuit breaker according to an embodiment of the present invention.

[0043] FIG. 7 is a drawing illustrating various shapes of a movement limiting part of a circuit breaker according to an embodiment of the present invention.

[0044] Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the embodiments of the present invention, if it is determined that a detailed description of related known components or functions would hinder understanding of the embodiments of the present invention, such detailed description is omitted.

[0045] In addition, terms such as first, second, A, B, (a), (b), etc., may be used when describing the components of the embodiments of the present invention. These terms are intended merely to distinguish the components from other components, and the essence, order, or sequence of the components is not limited by these terms. Where it is stated that a component is "connected," "combined," or "joined" to another component, it should be understood that the component may be directly connected or joined to the other component, but that another component may also be "connected," "combined," or "joined" between each component.

[0046] Hereinafter, a circuit breaker according to an embodiment of the present invention will be described with reference to the attached drawings.

[0047] FIG. 1 is a schematic cross-sectional view of a conventional circuit breaker, FIG. 2 is a schematic cross-sectional view of a circuit breaker according to an embodiment of the present invention, FIG. 3 is a schematic perspective view of an induction wing portion of a circuit breaker according to an embodiment of the present invention, FIG. 4 (a) and (b) are schematic perspective views of another embodiment of FIG. 3, FIG. 5 is a schematic diagram showing a movement limiting portion installed on a fixed portion of a circuit breaker according to an embodiment of the present invention, FIG. 6 is a schematic diagram showing a movement limiting portion installed on a movable portion of a circuit breaker according to an embodiment of the present invention, and FIG. 7 is a diagram exemplifying various shapes of a movement limiting portion of a circuit breaker according to an embodiment of the present invention.

[0048] Referring to FIG. 2, a circuit breaker according to one embodiment of the present invention may include a fixed part (100), a movable part (200), and a guide wing part (300).

[0049] The fixed part (100) can accommodate the fixed housing part (110), the fixed arc contact (120), and the fixed support member (130).

[0050] The fixed housing portion (110) may be provided in a cylindrical shape. The fixed housing portion (110) may include an outer fixed housing (111) and an inner fixed housing (112). In this case, although the inner fixed housing (112) is named as "inner," at least a portion of it may be exposed and protrude outward. The fixed housing portion (110), that is, the outer fixed housing (111), may have an outlet (111) provided on its outer surface, and exhaust gas that has traveled along the fixed discharge path (P) may be discharged to the outside through the outlet (111). Although the drawing shows only one outlet (111), this is an option for the manufacturer, and it is possible to form multiple outlets (111) at locations desired by the manufacturer. A mesh-shaped net may be provided in the outlet (111).

[0051] The fixed arc contact (120) can be accommodated along a virtual central axis inside the fixed part (100), and one end can be provided toward the movable part (200) described later.

[0052] A fixed support member (130) capable of supporting the fixed arc contact (120) may be provided on a portion of the outer surface of the fixed arc contact (120).

[0053] The fixed part (100) may be provided with a fixed main contact (140) that can be electrically connected when in contact with the movable part (200).

[0054] The movable part (200) may be electrically connected to or disconnected from the fixed part (100). The movable part (200) may accommodate a movable arc contact (250) described later inside, and the movable arc contact (250) may be provided on a virtual central axis of the movable part (200). The movable part (200) may include a movable housing part (210), a cylinder part (220), a rod part (240), a movable arc contact (250), a main nozzle part (260), an auxiliary nozzle part (270), and a rod support part (280).

[0055] The movable housing portion (210) can support the components housed inside. An outlet (211) may be provided on the outer surface of the movable housing portion (210), and multiple outlets (211) may be provided.

[0056] The cylinder part (220) can be placed inside the movable housing part (210). The cylinder part (220) can be connected to the rod part (240) described later to receive driving force. The cylinder part (220) can slide toward the fixed part (100), that is, move forward or backward, by the driving force.

[0057] The cylinder section (220) may include an end plate (221) and a middle plate (222). The cylinder section (220) may form a thermal expansion chamber (223) and a compression chamber (224) together with the end plate (221) and the middle plate (222). For reference, a hole (not indicated) may be formed in the middle plate (222) to allow gas to move. The thermal expansion chamber (223) may allow gas introduced from the internal space to expand, and the compression chamber (224) may compress gas introduced from the internal space.

[0058] A movable main contact (230) may be coupled to the outer side of the end plate (221) of the cylinder part (220). The movable main contact (230) can conduct main current when it comes into contact with the fixed main contact (140).

[0059] The rod portion (240) may include a cylinder rod (241) and a movable rod (242).

[0060] The cylinder rod (241) can be positioned on a virtual central axis of the movable part (200). The cylinder rod (241) can be connected to a movable rod (242) and can move forward or backward by the movable rod (242) which transmits the driving force of a driving part (not shown).

[0061] The movable arc contact (250) can selectively contact the fixed arc contact (120). The movable arc contact (250) can be coupled to the end of the cylinder rod (41). When energized, the movable arc contact (250) is connected to the fixed arc contact (120) to conduct current, and when cut off, it can generate an arc by being separated later than the movable main contact (230) and the fixed main contact (140).

[0062] A main nozzle section (260) may be coupled to the end plate (221) of the cylinder section (220) and the inner circumference of the movable main contact (230). The main nozzle section (260) may create a flow path for the arc generated during interruption. The arc may spread and move along the flow path formed inside the main nozzle section (260) together with the arc extinguishing gas sprayed from the thermal expansion chamber (223) formed inside the cylinder section (220). The main nozzle section (260) may have a neck (261) that narrows toward an imaginary centerline. The neck (261) may pressurize and support the fixed arc contact (120) when the fixed arc contact (120) passes through the main nozzle section (260).

[0063] An auxiliary nozzle section (270) may be provided inside the cylinder section (220) to form a flow path from the thermal expansion chamber (223) to the neck of the main nozzle section (260). The auxiliary nozzle section (270) may be provided outside the movable arc contact (250) described later.

[0064] The movable part (200) may include a load support part (280).

[0065] One side of the movable housing part (210) is combined with or supported by the fixed housing part (110), and a through hole (not shown) is provided on the other side of the movable housing part (210) to allow the rod part (240) to be inserted, and a rod support part (280) may be provided that is bent inward from the through hole into the movable housing part (210). The rod support part (280) may contact the outer surface of the rod part (240), specifically the cylinder rod (241), guide the reciprocating sliding of the cylinder rod (241), and support the cylinder rod (241).

[0066] Referring to FIG. 2, the guide wing section (300) may include a first guide wing section (310) installed in the fixed section (100) and a second guide wing section (320) installed in the movable section (200). The first guide wing section (310) may be provided on the outer side of the fixed support member (130) of the fixed section (100), that is, on the surface facing the first flow guide section (410) described later. The second guide wing section (320) may be provided on the outer side of the rod support section (280) of the movable section (200), that is, on the surface facing the second flow guide section (420).

[0067] The guide wing section (300) is provided in the discharge passages (P, Q) of the fixed section (100) and the movable section (200), respectively, and can guide metal vapor or discharged hot gas in a predetermined shape or direction. To explain in detail, the guide wing section (300) can be formed so that the metal vapor or discharged hot gas passing through the guide wing section (300) is rolled and obtains centrifugal force.

[0068] Referring to FIGS. 2 and 3, the first guide wing section (310) and the second guide wing section (320) may each include a wing support body (311, 321) and a wing (312, 322). That is, the first guide wing section (310) may have a cylindrical first wing support body (311) provided on the outer surface of the fixed support member (130), with the inner surface corresponding to the outer surface of the fixed support member (130), with the fixed support member (130) or the fixed arc contact (120) as the central axis, and a wing (312) may be provided protruding from the outer surface of the first wing support body (311). Additionally, the second guide wing section (320) may be provided with a cylindrical second wing support (321) on the outer surface of the rod support section (280) with the cylinder rod (241) as the central axis, and a wing (322) may be provided protruding from the outer surface of the second wing support (321). As mentioned above, the wing (312, 322) may be formed so as not to coincide with the central axis, that is, so as to be twisted and bent at a predetermined angle along the longitudinal direction of the fixed arc contact (120) or the cylinder rod (241), so that the metal vapor or discharged hot gas passing through the guide wing section (300) rolls and obtains centrifugal force.

[0069] Referring to FIG. 4 (a) and (b), the first guide wing section (310) may include a first wing (313) and a second wing (314). The first wing (313) and the second wing (314) may be provided on the outer side of the fixed support member (130) at an angle determined by a predetermined angle along the longitudinal direction of the central axis. The second wing (313) may be provided in conjunction with the first wing (312), and the angle or shape formed from the central axis of the first wing (313) and the second wing (314) may be different from each other. For example, the angle of the second wing (314) may be formed relatively larger than the angle formed by the first wing (313) relative to the central axis, thereby increasing the centrifugal force of the discharged hot gas.

[0070] Additionally, the second guide wing section (320) may include a first wing (323) and a second wing (324). The first wing (323) and the second wing (324) may be provided obliquely along the longitudinal direction of the central axis on the outer side of the rod support section (280) by a predetermined angle. The second wing (324) may be provided in conjunction with the first wing (323), and the angle or shape formed from the central axis of the first wing (323) and the second wing (324) may be different from each other. For example, the angle of the second wing (324) may be formed relatively larger than the angle formed by the first wing (323) relative to the central axis, thereby increasing the centrifugal force of the discharged hot gas.

[0071] Meanwhile, the first wing support (311) and the second wing support (321) may be omitted. For example, the wings (312, 313, 314) may be provided protruding from the outside of the fixed support member (130), and the wings (322, 323, 324) may be provided protruding from the outside of the rod support member (280).

[0072] In addition, the metal vapor or exhausted hot gas passing through the first and second guide wing sections (310, 320) is bent obliquely by the wings (312, 313, 314) and wings (322, 323, 324), and as the length of the flow path increases, the metal vapor or exhausted hot gas can secure more time for cooling.

[0073] Referring to FIG. 2 and FIG. 5 to 6, a circuit breaker according to one embodiment of the present invention may further include a flow guide portion (400).

[0074] The Euro guide section (400) can guide the high-temperature gas to extend the length of the exhaust passage (P, Q) through which the high-temperature gas expanded inside the fixed housing section (110) or the movable housing section (210) is discharged. The Euro guide section (400) may include a first and a second Euro guide section (420). The first Euro guide section (410) may be extended or connected along the longitudinal direction of the fixed arc contact (120) from one side of the inner fixed housing (112). The second Euro guide section (420) may be extended or connected along the longitudinal direction of the cylinder rod (241) from the cylinder section (220). In FIGS. 2, FIGS. 5, and FIGS. 6, the Euro guide section (400) is shown as a straight line, but this represents the Euro guide section (400) as seen in a cross-sectional view, and the actual Euro guide section (400) is preferably in the shape of a cylinder as shown in FIGS. 8 and FIGS. 9.

[0075] The first and second Euro guide sections (410, 420) may be provided with a movement limiting section (430) on the inner side, that is, on the surface facing the first and second guide wing sections (310, 320), respectively. The movement limiting section (430) may serve to limit the movement of metal powder or metal residue contained in the metal steam or discharged hot gas that has formed centrifugal force through the guide wing section (300).

[0076] Referring to FIGS. 5 and 6, the movement limiting part (430) may have a cross-section along the longitudinal direction of the Euro guide part (400) formed with irregularities. At this time, metal powder or metal residue contained in the metal vapor or discharged hot gas may get caught in the iron part (not marked) and accumulate in the hollow part (not marked).

[0077] Meanwhile, the movement limiting part (430) may have a cross-section formed along the longitudinal direction of the Euro guide part (400) formed as a polygon or at least one surface formed as a curved surface. For reference, the shape of the movement limiting part (430) is not specifically limited to any one type, and as long as it can restrict the movement of metal powder or metal residue in the metal steam or discharged hot gas, the shape can be provided in various ways according to the manufacturer's intention.

[0078] The movement restriction part (430) can be provided in a donut shape on the inner side of the Euro guide part (400).

[0079] As one of the movement restriction sections (430), a collection container section (not shown) may be provided in the flow guide section (400). The collection container section may be provided in the flow guide section (400) in the shape of a container that is open in the opposite direction of the discharge flow path (P, Q). Although not shown in the drawing, the collection container section may correspond to the fourth or fifth shape from the left in FIG. 7. The collection container section can collect metal powder or metal residue contained in metal vapor or discharged hot gas in which centrifugal force is formed by passing through the guide wing section (300).

[0080] Hereinafter, the operation process of a circuit breaker according to an embodiment of the present invention when interrupting is described with reference to the attached drawings.

[0081] Referring to FIG. 2, a circuit breaker according to one embodiment of the present invention has a fixed arc contact (120) and a movable arc contact (250) in contact to conduct current between a fixed part (100) and a movable part (200).

[0082] Subsequently, the movable part (200) moves to cut off the current, and the main contact is separated first, followed by the fixed arc contact (120) and the movable arc contact (250). Due to the relatively high current between the contacts, an arc is generated between the fixed arc contact (120) and the movable arc contact (250). When the current is cut off, the insulating gas temperature rises due to the arc generated between the movable arc contact (250) and the fixed arc contact (120), and the dissolution of the main nozzle part (260) proceeds. In the arc region between the main nozzle part (260) and the auxiliary nozzle part (270), the gas is formed in a high temperature and high pressure state.

[0083] As the movable part (200) moves, the insulating gas in the compression chamber (224) is compressed and flows into the thermal expansion chamber (223), and the high-temperature hot gas heated by the arc generated between the fixed arc contact (120) and the movable arc contact (250) flows into the thermal expansion chamber (223) and increases the pressure inside the thermal expansion chamber (223). For reference, when the current is zero, the high-pressure gas compressed in the thermal expansion chamber (223) is sprayed into the arc area through the flow path between the main nozzle part (260) and the auxiliary nozzle part (270).

[0084] When the fixed arc contact (120) and the main nozzle part (260) are separated and separated by a considerable distance, the high-temperature, high-pressure insulating gas compressed in the thermal expansion chamber (223) is discharged toward the arc (A) formed between the fixed arc contact (120) and the movable arc contact (250). Accordingly, the arc (A) formed between the fixed arc contact (120) and the movable arc contact (250) is extinguished. In addition, at the fixed arc contact (120) and the movable arc contact (250), a portion is eroded by the arc energy, and metal vapor is formed.

[0085] Subsequently, the gas injected from the thermal expansion chamber (223) is converted into high-temperature, high-pressure hot gas. The hot gas and metal vapor diffuse through the flow path between the auxiliary nozzle section (270) and the main nozzle section (260) and travel along the fixed discharge path (P) passing through the inside of the fixed section (100) and the discharge path (Q) passing through the inside of the movable section (200).

[0086] First, the fixed discharge path (P) passing through the inside of the fixed part (100) is described.

[0087] The exhaust hot gas and metal vapor sprayed from the thermal expansion chamber (223) pass between the main nozzle section (260) and the fixed arc contact (120) and then pass through the first guide vane section (310). At this time, since the first guide vane section (310) is formed at an angle, the exhaust hot gas gains centrifugal force while rolling, and since it travels further in a curved path than the straight distance to the end of the first flow guide section (410), cooling can be achieved for the increased travel distance. In addition, the distance to the discharge port (113) is increased by the first flow guide section (410), so the exhaust hot gas moves and cooling can be achieved. Also, some of the exhaust hot gas and metal vapor can be collected in the flow guide section (410) due to centrifugal force.

[0088] Afterward, the discharged hot gas that has been cooled is discharged to the outside through the outlet (113).

[0089] Next, the operating discharge path (Q) passing through the inside of the operating part (200) is first described.

[0090] The exhaust hot gas and metal vapor sprayed from the thermal expansion chamber (223) pass between the main nozzle section (260) and the auxiliary nozzle section (270), move into the auxiliary nozzle section (270) and the movable arc contact (250), and then pass through the second guide wing section (320). At this time, since the second guide wing section (320) is formed at an angle, the exhaust hot gas gains centrifugal force while rolling, and since it moves further in a curved path from the straight distance to the end of the second flow guide section (420), cooling can be achieved for the increased travel distance. Also, the distance to the discharge port (211) is increased by the second flow guide section (420), so the exhaust hot gas moves and cooling can be achieved. Also, the distance to the discharge port (211) is increased by the second flow guide section (410), so the exhaust hot gas moves and cooling can be achieved. In addition, the discharged hot gas and the metal vapor may be partially collected in the flow guide section (420) by centrifugal force.

[0091] Afterward, the discharged hot gas that has been cooled is discharged to the outside through the outlet (211).

[0092] The above description is merely an example for implementing a circuit breaker according to the present invention, and the present invention is not limited to the above-described example. The technical spirit of the present invention extends to the scope in which any person with ordinary knowledge in the technical field to which the present invention belongs can implement it by making various modifications without departing from the gist of the present invention as claimed in the following patent claims.

[0093] [Explanation of the symbol]

[0094] 100 : Fixed part 110 : Fixed housing part

[0095] 111 : Outer fixing housing 112 : Inner fixing housing

[0096] 113 : Outlet 120 : Fixed arc contact

[0097] 130 : Fixed support member 140 : Fixed main contact

[0098] 200 : Movable part 210 : Movable housing part

[0099] 211 : Outlet 220 : Cylinder part

[0100] 221 : End plate 222 : Middle plate

[0101] 223 : Thermal expansion chamber 224 : Compression chamber

[0102] 230: Movable main contact 240: Load part

[0103] 241: Cylinder rod 242: Movable rod

[0104] 250: Movable arc contact 260: Main nozzle section

[0105] 261 : Neck 270 : Auxiliary nozzle section

[0106] 280 : Rod support section 300 : Guide wing section

[0107] 310: First guide wing section 311: First wing support

[0108] 312 : Wing 313 : First Wing

[0109] 314: Second wing 320: Second guide wing section

[0110] 321 : Second wing support 322 : Wing

[0111] 323 : 1st Wing 324 : 2nd Wing

[0112] 400 : Euroguide Section 410 : 1st Euroguide Section

[0113] 420: 2nd Euroguide Section 430: Movement Restriction Section

[0114] P: Fixed discharge channel Q: Operating discharge channel

Claims

1. A fixed part comprising a fixed housing having a fixed arc contact, the fixed housing being composed of an outer fixed housing and an inner fixed housing, and having an exhaust passage formed on the inner side for discharging high-temperature gas; A movable part having a cylinder portion connected to a cylinder rod that receives driving force from a movable rod inside, a movable arc contact provided that reciprocates back and forth and is electrically connected to and disconnected from the fixed part and selectively contacts the fixed arc contact, and a discharge passage formed inside for discharging high-temperature gas; and A guide vane provided in the discharge passage of each of the fixed and movable parts to guide metal vapor or exhaust gas in a predetermined shape or direction; A circuit breaker that further includes.

2. In Paragraph 1, A flow path guide portion that extends or is connected along the longitudinal direction of the fixed arc contact from one side of the inner fixed housing, or extends or is connected along the longitudinal direction of the cylinder rod from the cylinder, and extends the length of the discharge path through which the expanded high-temperature gas is discharged; A circuit breaker that further includes.

3. In Paragraph 2, The above-mentioned movable part is, A rod support member that forms a through hole through which the cylinder rod passes and supports the cylinder rod by contacting the outer surface of the cylinder rod; Includes, The above-mentioned guide wing portion is a circuit breaker installed on the surface facing the above-mentioned flow guide portion of the above-mentioned rod support portion.

4. In Paragraph 2, The above fixed part is, A fixed support member that fixes and supports the fixed arc contact around the fixed arc contact; Includes, The above-mentioned guide wing portion is a circuit breaker installed on the surface of the above-mentioned fixed support member facing the above-mentioned flow guide portion.

5. In Paragraph 1, A circuit breaker in which the above-mentioned guide vane is formed so that metal vapor or exhaust gas passing through the above-mentioned guide vane rolls and obtains centrifugal force.

6. In Paragraph 3, The above-mentioned guide wing section is, A wing formed obliquely along the longitudinal direction of the cylinder rod on the cylinder rod or the rod support, with the cylinder rod as the central axis; A circuit breaker that further includes.

7. In Paragraph 4, The above-mentioned guide wing section is, A wing formed obliquely along the longitudinal direction of the fixed arc contact on the outer side of the fixed arc contact or on the outer side of the fixed support member, with the fixed arc contact as the central axis; A circuit breaker that further includes.

8. In Paragraph 6 or 7, The above-mentioned guide wing section is, A first wing obliquely provided along the longitudinal direction of the central axis on the outer side of the central axis; and A second wing provided obliquely along the longitudinal direction of the central axis on the outer side of the central axis and connected to the first wing; A circuit breaker that further includes.

9. In Paragraph 2, A movement restriction part provided in the above Euro guide part and restricting the movement of metal powder or metal residue contained in metal vapor or exhaust gas in which centrifugal force is formed by passing through the above guide wing part; A circuit breaker that further includes.

10. In Paragraph 9, The above movement limiting part is a circuit breaker in which the cross-section along the longitudinal direction of the above Euro guide part is formed as irregularities.

11. In Paragraph 9, The above movement limiting part is a blocker in which the cross-section formed along the longitudinal direction of the above Euro guide part is formed as a polygon or at least one side is formed as a curved surface.

12. In Paragraph 9, The above movement limiting part is a blocker provided in a donut shape on the inner surface of the above Euro guide part.

13. In Paragraph 2, A collection container portion provided in the above-mentioned Euro guide portion in the shape of a container open in the opposite direction of the Euro, and collecting metal powder or metal residue contained in metal vapor or exhaust gas in which centrifugal force is formed by passing through the above-mentioned guide wing portion; A circuit breaker that further includes.

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