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KR-20260063997-A - GAS CIRCUIT BREAKER WITH ROTARY VANES

KR20260063997AKR 20260063997 AKR20260063997 AKR 20260063997AKR-20260063997-A

Abstract

The present invention relates to a high-voltage circuit breaker comprising a rotating blade. The invention may further comprise: a fixed part including a fixed housing and a fixed arc contact; a movable part having a cylinder part connected to a cylinder rod that receives driving force from a movable rod, and having a movable arc contact that reciprocates back and forth, is electrically connected to and disconnected from the fixed part, and selectively contacts the fixed arc contact; a flow guide part that extends or is connected along the longitudinal direction of the fixed arc contact from one side of the 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; and a guide blade part provided in the discharge path of each of the fixed part or the movable part and rotates to guide metal vapor or exhaust gas in a predetermined shape or direction. The present invention has the effect of reducing metal powder or metal debris contained in the hot gas discharged outside the circuit breaker, as the centrifugal force is strengthened as the induction vane rotates when the circuit breaker discharges hot gas generated during the process of interrupting the fault current, causing metal powder or metal debris contained in the discharged hot gas to gather at the edge of the flow guide part and be easily collected.

Inventors

  • 유정현
  • 송태헌

Assignees

  • 에이치디현대일렉트릭 주식회사

Dates

Publication Date
20260507
Application Date
20241031

Claims (13)

  1. A fixed part comprising a fixed housing composed of an outer fixed housing and an inner fixed housing, wherein a fixed arc contact is provided in a column shape having a predetermined length; A movable part comprising a cylinder portion connected to a cylinder rod that receives driving force from a movable rod, having a column shape having a predetermined length, and a movable arc contact that reciprocates back and forth, is electrically connected to and disconnected from the fixed portion, and selectively contacts the fixed arc contact; 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; and A guide vane portion provided in the discharge passage of each of the above-mentioned fixed or movable portions and rotating to guide metal vapor or exhaust gas in a predetermined shape or direction; A high-voltage circuit breaker including a rotating blade that further includes
  2. In paragraph 1, A high-voltage circuit breaker comprising a rotating blade formed such that the induction vane portion is rolled and centrifugal force is obtained by the metal vapor or exhaust gas passing through the induction vane portion.
  3. In paragraph 1, 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-described guide wing portion is a high-voltage circuit breaker comprising a rotating wing installed on the surface facing the flow guide portion of the above-described fixed support member.
  4. In paragraph 3, The above-mentioned guide wing section is, A first rotating body rotatably provided around the fixed support member in a cylindrical shape having an inner surface corresponding to the outer surface of the fixed support member; and A wing obliquely arranged along a virtual central axis on the outer surface of the first rotating body; A high-voltage circuit breaker including a rotating blade that further includes
  5. In paragraph 1, A high-voltage circuit breaker comprising a guide vane installed in the Euro guide section, and a rotating vane installed on a surface facing the virtual center axis of the fixed section.
  6. In paragraph 5, The above-mentioned guide wing section is, A second rotating body having an outer surface corresponding to the inner surface of the above-mentioned Euro guide portion in a cylindrical shape and rotatably provided on the inner surface of the above-mentioned Euro guide portion; and A wing obliquely arranged along the virtual central axis on the inner circumference of the second rotating body; A high-voltage circuit breaker including a rotating blade that further includes
  7. In paragraph 1, 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, A high-voltage circuit breaker comprising a rotating blade installed on the surface of the guide wing portion facing the flow guide portion of the rod support portion.
  8. In Paragraph 7, The above-mentioned guide wing section is, A third rotating body provided in a cylindrical shape having an inner surface corresponding to the outer surface of the rod support member and rotatably centered on the rod support member; and A wing obliquely arranged along a virtual central axis on the outer surface of the third rotating body; A high-voltage circuit breaker including a rotating blade that further includes
  9. In paragraph 1, A high-voltage circuit breaker comprising a guide vane installed in the Euro guide section, and a rotating vane installed on a surface facing the virtual center axis of the movable section.
  10. In paragraph 6, The above-mentioned guide wing section is, A fourth rotating body having a cylindrical shape with an outer surface corresponding to the inner surface of the above-mentioned Euro guide part and rotatably provided on the inner surface of the above-mentioned Euro guide part; and A wing obliquely arranged along the virtual central axis on the inner circumference of the fourth rotating body; A high-voltage circuit breaker including a rotating blade that further includes
  11. In paragraph 3, The above-mentioned guide wing section is, A first outer rotating body that is cylindrical in shape, having a virtual rotation axis identical to the virtual center axis of the fixed arc contact, and is rotatably installed around the virtual rotation axis on the inner surface of the inner fixed housing or the inner surface of the flow guide part; A first inner rotating body that is cylindrical, having a virtual rotation axis identical to the virtual center axis of the fixed arc contact, through which the fixed arc contact passes, and which is spaced apart from the fixed arc contact; and A wing connecting the first outer rotating body and the first inner rotating body and obliquely provided at a predetermined angle along the virtual central axis; A high-voltage circuit breaker including a rotating blade that further includes
  12. In Paragraph 7, The above-mentioned guide wing section is, A second outer rotating body having a cylindrical shape having a virtual rotation axis identical to the virtual central axis of the rod support part, rotatably installed on the inner surface of the flow guide part around the virtual rotation axis, and having an inner surface to which the outer end of the wing is connected; A second inner rotating body provided on the outer surface of the rod support member in a cylindrical shape having a virtual rotation axis identical to the virtual central axis of the rod support member; and A wing connecting the second outer rotating body and the second inner rotating body and obliquely provided at a predetermined angle along the virtual central axis; A high-voltage circuit breaker including a rotating blade that further includes
  13. In any one of paragraphs 4, 6, 8, 10 through 12, The above wing is, A first wing obliquely arranged along a virtual central axis on the outer or inner surface of each rotating body; and A second wing provided obliquely along a virtual central axis on the outer or inner surface of each rotating body and connected to the first wing; A high-voltage circuit breaker including a rotating blade that further includes

Description

High-voltage circuit breaker including rotary vanes {Gas Circuit Breaker with Rotary Vanes} The present invention relates to a circuit breaker, and more specifically, to a high-voltage circuit breaker including a rotating blade. Generally, circuit breakers are used to interrupt fault currents and protect power equipment in the event of a fault in a power system. 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. Basically, when an arc caused by a fault current occurs while the insulating gas is filled into the circuit breaker at high pressure, the insulating gas is compressed to a very high pressure and forcefully sprayed directly onto the arc to extinguish it. 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. This type of composite arc-extinguishing gas circuit breaker forms high-pressure gas using a compression chamber and a thermal expansion chamber installed inside the breaker to extinguish the arc caused by the fault current. 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. 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. 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 installed between the compression chamber and the thermal expansion chamber 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. 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. 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. The gas that flows back into the thermal expansion chamber mixes with the gas that moved from the compression chamber to the thermal expansion chamber, lowers its temperature, and is then injected into the arc between the fixed arc contact and the movable arc contact to extinguish the arc. 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. Meanwhile, in the case of a typical power system, since it is AC, there exists a point where the current becomes "zero." At this time, the gas charged at high pressure in the thermal expansion chamber is injected as an arc to extinguish the arc between the two electrical contacts, thereby interrupting the fault current. With this, insulation performance is restored, and it is said that the blockage was successful. At this time, as 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. 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. FIG. 1 is a schematic cross-sectional view of a high-voltage circuit breaker including a rotating blade according to an embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing another embodiment of FIG. 1. FIG. 3 is a schematic perspective view showing an induction vane portion of a high-voltage circuit breaker including a rotating vane according to an embodiment of the present invention. FIG. 4 is a schematic perspective view of another embodiment of FIG. 3. FIG. 5 is a schematic perspective view showing the appearance of an outer or inner rotating body installed in FIG. 3. Figures 6 (a) and (b) are schematic perspective views showing a modified example of Figure 3. Figures 7 (a) and (b) are schema