JP6639692B2 - Gas circuit breaker - Google Patents

Description

  The present invention relates to a gas circuit breaker and an arc extinguishing method.

  A gas circuit breaker that extinguishes an arc generated between a fixed contact and a movable contact when the movable contact separates from the fixed contact by blowing arc-extinguishing gas to the fixed contact and the movable contact is known. (See Patent Document 1). The gas circuit breaker disclosed in Patent Document 1 includes a container filled with an arc-extinguishing gas, a fixed contact, a movable contact, a high-pressure chamber, a low-pressure chamber, and a high-pressure chamber and a low-pressure chamber. A blow-off valve.

JP-A-47-4233

  In the gas circuit breaker disclosed in Patent Literature 1, the blowing valve opens at the same time that the movable contact moves away from the fixed contact. At the moment the arc occurs, there is no flow of the arc-extinguishing gas around the movable and stationary contacts. Therefore, at the moment when an arc is generated, the arc-extinguishing gas is not quickly blown to the movable contact and the fixed contact. The gas circuit breaker disclosed in Patent Literature 1 has insufficient arc quenching performance.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a gas circuit breaker and an arc extinguishing method having high arc extinguishing performance.

  A gas circuit breaker according to the present invention includes a fixed contact, a movable contact having a first end on the fixed contact side, and a gas blower for blowing arc-extinguishing gas to at least one of the fixed contact and the first end. And The gas blowing unit continues to blow the arc-extinguishing gas to at least one of the fixed contact and the first end from before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. It is configured as follows.

  The arc extinguishing method of the present invention includes separating the movable contact that is in contact with the fixed contact from the fixed contact. The arc extinguishing method according to the present invention is characterized in that the first end of the fixed contact and the movable contact on the fixed contact side are provided before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. At least one of the parts comprises continuing to blow the arc-extinguishing gas.

  In the gas circuit breaker of the present invention, at least one of the fixed contact and the first end is provided before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. It is configured to continuously blow the arc-extinguishing gas. Therefore, in the gas circuit breaker of the present invention, at the moment when the movable contact is separated from the fixed contact and an arc is generated, the arc-extinguishing gas is already sprayed on at least one of the first ends of the fixed contact and the movable contact. Have been. The gas circuit breaker of the present invention has high arc extinguishing performance.

  According to the arc extinguishing method of the present invention, at least one of the fixed contact and the first end is extinguished between before the movable contact separates from the fixed contact and after the movable contact separates from the fixed contact. Gas continues to be sprayed. Therefore, in the arc extinguishing method of the present invention, at the moment when the movable contact is separated from the fixed contact and an arc is generated, the arc-extinguishing gas is already sprayed on at least one of the first ends of the fixed contact and the movable contact. Have been. The arc extinguishing method of the present invention has high arc extinguishing performance.

FIG. 2 is a schematic sectional view showing a closed state of the gas circuit breaker according to Embodiment 1 of the present invention. FIG. 3 is a schematic cross-sectional view showing a circuit opening process of the gas circuit breaker according to Embodiment 1 of the present invention. FIG. 2 is a schematic sectional view showing an open state of the gas circuit breaker according to Embodiment 1 of the present invention. It is a schematic sectional view showing the closed state of the gas circuit breaker according to Embodiment 2 of the present invention. FIG. 10 is a schematic cross-sectional view showing an opening process of the gas circuit breaker according to Embodiment 2 of the present invention. FIG. 7 is a schematic sectional view showing an open state of a gas circuit breaker according to Embodiment 2 of the present invention. FIG. 9 is a schematic sectional view showing a closed state of a gas circuit breaker according to Embodiment 3 of the present invention. FIG. 10 is a schematic cross-sectional view of a regulating member in a closed state of a gas circuit breaker according to Embodiment 3 of the present invention. FIG. 13 is a schematic cross-sectional view showing an opening process of the gas circuit breaker according to Embodiment 3 of the present invention. FIG. 13 is a schematic cross-sectional view of a regulating member in a process of opening a gas circuit breaker according to Embodiment 3 of the present invention. FIG. 9 is a schematic sectional view showing an open state of a gas circuit breaker according to Embodiment 3 of the present invention. FIG. 10 is a schematic cross-sectional view of a regulating member in an open state of a gas circuit breaker according to Embodiment 3 of the present invention. It is a schematic sectional view showing the closed state of the gas circuit breaker according to Embodiment 4 of the present invention. FIG. 13 is a schematic cross-sectional view showing an opening process of the gas circuit breaker according to Embodiment 4 of the present invention. FIG. 14 is a schematic sectional view showing an open state of a gas circuit breaker according to Embodiment 4 of the present invention. FIG. 14 is a schematic sectional view showing a closed state of a gas circuit breaker according to Embodiment 5 of the present invention. FIG. 13 is a schematic sectional view showing a closed state of a gas circuit breaker according to Embodiment 6 of the present invention. It is a schematic sectional view showing an opening process of a gas circuit breaker concerning Embodiment 6 of the present invention. FIG. 13 is a schematic sectional view showing an open state of a gas circuit breaker according to Embodiment 6 of the present invention. FIG. 13 is a schematic sectional view showing an open state of a gas circuit breaker according to Embodiment 6 of the present invention.

  Hereinafter, embodiments of the present invention will be described. Note that the same components are denoted by the same reference numerals, and description thereof will not be repeated.

Embodiment 1 FIG.
The gas circuit breaker 1 according to the first embodiment will be described with reference to FIGS. The gas circuit breaker 1 according to the present embodiment includes a first gas chamber 20, a second gas chamber 22, a fixed contact 25, a movable contact 30, and a gas blowing unit (13, 16, 20, 22). , 26, 55). The gas circuit breaker 1 of the present embodiment includes a first gas chamber 23, a guide member (first guide member 37), an elastic member 40, a driving unit 53, and a movable member (first movable member 50). , And a pump 63.

The first gas chambers 20 and 23 are filled with an arc-extinguishing gas having a first pressure. The second gas chamber 22 is filled with an arc-extinguishing gas having a second pressure higher than the first pressure. The arc-extinguishing gas is, for example, sulfur hexafluoride (SF ₆ ) gas, carbon dioxide (CO ₂ ) gas, trifluoromethane iodide (CF ₃ I) gas, tetrafluoromethane (CF ₄ ), nitrogen (N ₂ ) The gas may be a gas, an argon (Ar) gas, a dry air, or a mixed gas of at least two of them. The first gas chambers 20 and 23 and the second gas chamber 22 may be formed by partitioning the internal space of the gas tank 9. Specifically, the first gas chambers 20 and 23 and the second gas chamber 22 may be formed by partitioning the internal space of the gas tank 9 with the first partition plate 13 and the second partition plate 16. . The first partition plate 13 and the second partition plate 16 are fixed to the gas tank 9.

  The outer walls (10, 11) of the gas tank 9 include a first outer wall 10 and a second outer wall 11. The first outer wall 10 is in contact with the first gas chamber 23 on the first partition plate 13 side and the first gas chamber 20 on the second partition plate 16 side. The second outer wall 11 is in contact with the second gas chamber 22. The second outer wall 11 has a first outer wall 10 in contact with the first gas chamber 23 on the first partition plate 13 side, and a first outer wall 10 in contact with the first gas chamber 20 on the second partition plate 16 side. May be connected.

  The second outer wall 11 of the gas tank 9 in contact with the second gas chamber 22 may be thicker than the first outer wall 10 of the gas tank 9 in contact with the first gas chambers 20,23. Since the second outer wall 11 is thicker than the first outer wall 10, the gas tank 9 can withstand the second pressure of the arc-extinguishing gas sealed in the second gas chamber 22. The first outer wall 10 may have the same thickness as the second outer wall 11.

  The first partition plate 13 may include a first terminal plate 14 having conductivity and a first insulating spacer 15. The first insulating spacer 15 may be arranged on the outer periphery of the first terminal board 14. The first partition plate 13 (first insulating spacer 15) may be in contact with the first outer wall 10. The first partition plate 13 (first insulating spacer 15) may be in contact with the second outer wall 11.

  The second partition plate 16 may include a second terminal plate 17 having conductivity and a second insulating spacer 18. The second insulating spacer 18 may be arranged on the outer periphery of the second terminal plate 17. The second partition plate 16 (second insulating spacer 18) may be in contact with the first outer wall 10. The second partition plate 16 (second insulating spacer 18) may be in contact with the second outer wall 11.

  The second partition plate 16 may have a first through hole 19. Specifically, the second terminal plate 17 may have the first through hole 19. The second partition plate 16 may include a sealing member 57 such as an O-ring on the surface of the second partition plate 16 that is in contact with the first gas chamber 20 on the second partition plate 16 side. As shown in FIG. 1, when the valve 55 is in a closed state in which the second gas chamber 22 is fluidly shut off from the first gas chamber 20, the sealing member 57 is connected to the valve 55 and the second partition plate. 16 (second terminal plate 17) is prevented from leaking. The sealing member 57 may be arranged in a recess provided on the surface of the second partition plate 16 facing the first gas chamber 20.

  The fixed contact 25 is fixed to the gas tank 9. Specifically, the fixed contact 25 is fixed to the first partition plate 13. More specifically, the fixed contact 25 is fixed to the first terminal plate 14 of the first partition plate 13. The first conductor 5 is arranged in the first gas chamber 23 on the first partition plate 13 side. A current supplied from outside the gas circuit breaker 1 flows through the first conductor 5. The fixed contact 25 is electrically connected to the first conductor 5. Specifically, the fixed contact 25 is electrically connected to the first conductor 5 via the first conductive member 7 and the first terminal plate 14. The first conductor 5 extends inside the first bushing 3. The first bushing 3 is connected to the first outer wall 10 that is in contact with the first gas chamber 23 on the first partition plate 13 side.

  The movable contact 30 has a first end 31 on the fixed contact 25 side and a second end 32 on the opposite side to the first end 31. The movable contact 30 can move with respect to the fixed contact 25. When the movable contact 30 is in contact with the fixed contact 25 as shown in FIGS. 1 and 2, the first end 31 of the movable contact 30 may be in contact with the fixed contact 25. The movable contact 30 may slide on the first guide member 37 fixed to the gas tank 9 via the second partition plate 16. Specifically, the movable contact 30 may slide on the second inner peripheral portion 39 of the first guide member 37.

  The second conductor 6 is arranged in the first gas chamber 20 on the second partition plate 16 side. A current supplied from outside the gas circuit breaker 1 flows through the second conductor 6. The movable contact 30 is electrically connected to the second conductor 6. Specifically, the movable contact 30 is electrically connected to the second conductor 6 via the second conductive member 8, the second terminal plate 17, and the first guide member 37. The second conductor 6 extends inside the second bushing 4. The second bushing 4 is connected to the first outer wall 10 that is in contact with the first gas chamber 20 on the second partition plate 16 side.

  The movable contact 30 may be a cylindrical conductive member having the first inner peripheral portion 38. At least one of the movable contact 30 and the fixed contact 25 is such that even if the movable contact 30 is in contact with the fixed contact 25, the first inner peripheral portion 38 of the movable contact 30 is the first inner peripheral portion 38 of the movable contact 30. It is configured to fluidly communicate with the second gas chamber 22 outside the end 31. The movable contact 30 may have an opening 31p at the first end 31. The movable contact 30 may have a second through hole 36 at the second end 32. The second through-hole 36 fluidly connects the first inner peripheral portion 38 of the movable contact 30 and the second inner peripheral portion 39 of the first guide member 37.

  The gas blowing section (13, 16, 20, 22, 26, 55) includes a first gas chamber 20 in which an arc-extinguishing gas having a first pressure is filled, and a second pressure higher than the first pressure. A second gas chamber 22 filled with an arc-extinguishing gas having The gas blowing section (13, 16, 20, 22, 26, 55) may include a second partition plate 16 that partitions the first gas chamber 20 and the second gas chamber 22, and a nozzle 26.

  The valve 55 has a closed state in which the valve 55 fluidly shuts off the second gas chamber 22 from the first gas chamber 20 (FIG. 1), and the valve 55 connects the second gas chamber 22 to the first gas chamber 20. It is configured to be movable between an open state (FIGS. 2 and 3) that fluidly communicates with. The valve 55 closes the first through hole 19 when the valve 55 is closed. Specifically, the valve 55 is in close contact with the second partition plate 16 (the second terminal plate 17) via the sealing member 57 in the closed state of the valve 55, and closes the first through hole 19.

  The valve 55 opens the first through hole 19 when the valve 55 is open. Specifically, the valve 55 separates from the second partition plate 16 (the second terminal plate 17) and opens the first through hole 19 when the valve 55 is open. The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. When the valve 55 is open, the arc-extinguishing gas flows from the second gas chamber 22 to the first gas chamber 20. At least one of the fixed contact 25 and the first end 31 of the movable contact 30 is arranged in a flow path of the arc-extinguishing gas formed when the valve 55 is open.

  The gas blowing unit (13, 16, 20, 22, 26, 55) blows an arc-extinguishing gas to at least one of the fixed contact 25 and the first end 31 of the movable contact 30. The gas blowing unit (13, 16, 20, 22, 22, 26, 55) provides fixed contact between before the movable contact 30 separates from the fixed contact 25 and after the movable contact 30 separates from the fixed contact 25. It is configured to continuously blow the arc-extinguishing gas to at least one of the first end 31 of the contact 25 and the movable contact 30. The valve 55 is configured to switch from the closed state to the open state before the movable contact 30 separates from the fixed contact 25.

  Specifically, the elastic member 40 connects the movable contact 30 and the valve 55. The end on the movable contact 30 side of the elastic member 40 is connected to the second end 32 of the movable contact 30. The elastic member 40 may be, for example, a spring such as a coil spring, or a rubber member such as a columnar rubber member. In the closed state (FIG. 1) and the open circuit process (FIG. 2) of the gas circuit breaker 1, the elastic member 40 is compressed. The compression of the elastic member 40 means that the elastic member 40 has a length shorter than the natural length of the elastic member 40. The natural length of the elastic member 40 is defined as the length of the elastic member 40 when no force is applied to the elastic member 40. In the closed state (FIG. 1) and the open circuit state (FIG. 2) of the gas circuit breaker 1, the elastic member 40 is compressed, and the elastic member 40 continues to urge the movable contact 30 toward the fixed contact 25. . In the closed state (FIG. 1) and the open circuit process (FIG. 2) of the gas circuit breaker 1, the movable contact 30 continues to contact the fixed contact 25.

  At least one of the movable contact 30 and the fixed contact 25 is such that, even when the movable contact 30 is in contact with the fixed contact 25, the first inner peripheral portion 38 of the movable contact 30 is in contact with the movable contact 30. It is configured to be in fluid communication with the second gas chamber 22 outside the first end 31 of the child 30. The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. Before the movable contact 30 separates from the fixed contact 25, that is, from when the movable contact 30 is in contact with the fixed contact 25, at least the first end 31 of the fixed contact 25 and the movable contact 30. One is blown with an arc-extinguishing gas.

  As shown in FIG. 3, when the drive unit 53 further drives the first movable member 50 and the valve 55 further moves, the elastic member 40 becomes longer than the natural length of the elastic member 40. The movable contact 30 is pulled by the elastic member 40 and starts moving. The movable contact 30 is separated from the fixed contact 25, and the gas circuit breaker 1 is in an open circuit state (FIG. 3). The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. Even after the movable contact 30 separates from the fixed contact 25, the arc-extinguishing gas is blown to at least one of the fixed contact 25 and the first end 31. Thus, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 from before the movable contact 30 separates from the fixed contact 25 until after the movable contact 30 separates from the fixed contact 25. The arc-extinguishing gas is continuously blown.

  The nozzle 26 guides the arc-extinguishing gas toward at least one of the fixed contact 25 and the first end 31 of the movable contact 30. The nozzle 26 concentrates the arc-extinguishing gas flowing from the second gas chamber 22 toward the first gas chamber 20 to at least one of the fixed contact 25 and the first end 31 of the movable contact 30. The nozzle 26 may have electrical insulation.

  The nozzle 26 may include a base 27 and a protrusion 28 projecting from the base 27 toward the movable contact 30. The nozzle 26 may be attached to a side surface of the fixed contact 25. Specifically, the base 27 of the nozzle 26 may be attached to the side of the fixed contact 25. The protrusion 28 may surround the end of the fixed contact 25 on the movable contact 30 side. In the closed state (FIG. 1) and the open circuit process (FIG. 2) of the gas circuit breaker 1, the protrusion 28 may surround the first end 31 of the movable contact 30. In the closed state (FIG. 1) and the open circuit process (FIG. 2) of the gas circuit breaker 1, the projecting portion 28 may surround the contact portion between the fixed contact 25 and the movable contact 30. The protrusion 28 may surround an end of the first guide member 37 on the movable contact 30 side.

  The protrusion 28 is arranged with a gap from the first guide member 37. In the open state of the valve 55 (FIGS. 2 and 3), the arc-extinguishing gas fills the gap between the projection 28 and the first guide member 37 with the first end 31 of the fixed contact 25 and the movable contact 30. Flows towards at least one of

  The first guide member 37 guides the movable contact 30. The first guide member 37 may be a cylindrical conductive member having a second inner peripheral portion 39. The movable contact 30 may be arranged in the second inner peripheral portion 39 of the first guide member 37. The first guide member 37 may define at least a part of the arc extinguishing gas flow path. The first guide member 37 concentrates the arc-extinguishing gas flowing from the second gas chamber 22 toward the first gas chamber 20 to at least one of the fixed contact 25 and the first end 31 of the movable contact 30. Can be done. In a closed state of the valve 55 (FIG. 1), the elastic member 40 may be disposed in the second inner peripheral portion 39 of the first guide member 37.

  The drive unit 53 drives the first movable member 50. The first movable member 50 may be an insulating rod. The valve 55 is attached to the first movable member 50. The valve 55 moves integrally with the first movable member 50. The end of the elastic member 40 on the drive unit 53 side is connected to the first movable member 50. The movable contact 30 is connected to the first movable member 50 via the elastic member 40. In the closed state of the valve 55 (FIG. 1), a part of the first movable member 50 may extend into the first through hole 19 and the second inner peripheral portion 39 of the first guide member 37.

  In the closing process of the gas circuit breaker 1 in which the gas circuit breaker 1 changes from the open circuit state (FIG. 3) to the closed state (FIG. 1), the pump 63 removes the arc-extinguishing gas sealed in the first gas chamber 20. It is sent to the second gas chamber 22. The pump 63 decreases the pressure of the arc-extinguishing gas in the first gas chamber 20 and increases the pressure of the arc-extinguishing gas in the second gas chamber 22. The pump 63 may be connected to the first gas chamber 20 via the first pipe 64. The pump 63 may be connected to the second gas chamber 22 via the second pipe 65.

The operation of the gas circuit breaker 1 according to the present embodiment and the arc extinguishing method according to the present embodiment will be described.
In the closed state (FIG. 1) of the gas circuit breaker 1, the movable contact 30 is in contact with the fixed contact 25, and the valve 55 is configured such that the valve 55 connects the second gas chamber 22 to the first gas chamber 22. Is in a closed state where it is fluidly shut off from the gas chamber 20. In the closed state of the valve 55, the elastic member 40 is compressed and urges the movable contact 30 toward the fixed contact 25. The fixed contact 25 may contact the first end 31 of the movable contact 30. The valve 55 is in close contact with the second partition plate 16 (second terminal plate 17). The valve 55 prevents the extinguishing gas from flowing from the second gas chamber 22 to the first gas chamber 20.

  In the course of opening the gas circuit breaker 1 (FIG. 2), the drive unit 53 drives the first movable member 50, and the valve 55 switches from the closed state to the open state. The valve 55 is separated from the second partition plate 16 (second terminal plate 17). Also in the course of opening the gas circuit breaker 1, the elastic member 40 is compressed, and the elastic member 40 continues to urge the movable contact 30 toward the fixed contact 25. The movable contact 30 keeps in contact with the fixed contact 25 even in the process of opening the gas circuit breaker 1.

  The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. At least one of the movable contact 30 and the fixed contact 25 is such that even if the movable contact 30 is in contact with the fixed contact 25, the first inner peripheral portion 38 of the movable contact 30 is the first inner peripheral portion 38 of the movable contact 30. It is configured to fluidly communicate with the second gas chamber 22 outside the end 31. When the valve 55 switches from the closed state to the open state, the arc-extinguishing gas flows from the second gas chamber 22 to the first gas chamber 20. At least one of the fixed contact 25 and the first end 31 of the movable contact 30 is arranged in a flow path of the arc-extinguishing gas formed when the valve 55 is open. Before the movable contact 30 separates from the fixed contact 25, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is blown with an arc-extinguishing gas.

  As shown in FIG. 3, when the drive unit 53 further drives the first movable member 50 and the valve 55 further moves, the elastic member 40 becomes longer than the natural length of the elastic member 40. The movable contact 30 is pulled by the elastic member 40 and starts moving. The movable contact 30 is separated from the fixed contact 25, and the gas circuit breaker 1 is opened. Since the second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20, even when the gas circuit breaker 1 is in the open state (FIG. 3), the fixed contact 25 and the movable contact 25 are provided. Arc extinguishing gas is still blown on at least one of the first ends 31 of 30.

  As described above, from the time before the movable contact 30 separates from the fixed contact 25 to the time after the movable contact 30 separates from the fixed contact 25, the first ends 31 of the fixed contact 25 and the movable contact 30 are changed. At least one arc-extinguishing gas is continuously blown. At the moment when the movable contact 30 separates from the fixed contact 25 and an arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 It is configured such that the arc-extinguishing gas has already been blown to the fin. The gas circuit breaker 1 of the present embodiment can quickly extinguish the arc 60.

  In the closing process of the gas circuit breaker 1 in which the gas circuit breaker 1 transitions from the open circuit state shown in FIG. 3 to the closed circuit state shown in FIG. 1, the movable contact 30 first contacts the fixed contact 25. Next, the valve 55 switches from the open state to the closed state, and fluidly shuts off the second gas chamber 22 from the first gas chamber 20. Then, the pump 63 sends the arc-extinguishing gas sealed in the first gas chamber 20 to the second gas chamber 22. When the gas circuit breaker 1 transits from the closed state shown in FIG. 1 to the open state shown in FIG. 3, the arc-extinguishing gas flowing out of the second gas chamber 22 toward the first gas chamber 20 is supplied to the pump 63. Is returned to the second gas chamber 22. The pump 63 decreases the pressure of the arc-extinguishing gas in the first gas chamber 20 and increases the pressure of the arc-extinguishing gas in the second gas chamber 22.

  As shown in FIGS. 1 to 3, the arc extinguishing method of the present embodiment includes separating the movable contact 30 that is in contact with the fixed contact 25 from the fixed contact 25. As shown in FIGS. 2 and 3, the arc extinguishing method according to the present embodiment is performed from before the movable contact 30 separates from the fixed contact 25 to after the movable contact 30 separates from the fixed contact 25. The method further includes continuously blowing the arc-extinguishing gas to at least one of the fixed contact 25 and the first end 31 of the movable contact 30 on the fixed contact 25 side. In the arc extinguishing method of the present embodiment, at the moment when the movable contact 30 is separated from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is applied. Arc extinguishing gas has already been sprayed. According to the arc extinguishing method of the present embodiment, arc 60 can be extinguished quickly.

The effects of the gas circuit breaker 1 and the arc extinguishing method of the present embodiment will be described.
The gas circuit breaker 1 of the present embodiment includes a fixed contact 25, a movable contact 30 having a first end 31 on the fixed contact 25 side, and at least one of the fixed contact 25 and the first end 31. And a gas blowing portion (13, 16, 20, 22, 26, 55) for blowing an arc-extinguishing gas. The gas blowing unit (13, 16, 20, 22, 22, 26, 55) provides fixed contact between before the movable contact 30 separates from the fixed contact 25 and after the movable contact 30 separates from the fixed contact 25. It is configured to continue blowing the arc-extinguishing gas to at least one of the terminal 25 and the first end 31.

  In the gas circuit breaker 1 of the present embodiment, at the moment when the movable contact 30 separates from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is formed. The arc-extinguishing gas has already been sprayed. The gas circuit breaker 1 of the present embodiment can quickly extinguish the arc 60. The gas circuit breaker 1 of the present embodiment has high arc extinguishing performance.

  In the gas circuit breaker 1 according to the present embodiment, the gas blowing units (13, 16, 20, 22, 26, and 55) include a first gas chamber 20 in which an arc-extinguishing gas having a first pressure is filled, The valve includes a second gas chamber in which an arc-extinguishing gas having a second pressure higher than the first pressure is filled, and a valve. The valve 55 has a closed state in which the valve 55 fluidly shuts off the second gas chamber 22 from the first gas chamber 20, and the valve 55 fluidly connects the second gas chamber 22 to the first gas chamber 20. It is configured to be switchable between an open state for communication. At least one of the fixed contact 25 and the first end 31 is disposed in a flow path of the arc-extinguishing gas formed when the valve 55 is open. The valve 55 is configured to switch from the closed state to the open state before the movable contact 30 separates from the fixed contact 25.

  In the gas circuit breaker 1 of the present embodiment, the valve 55 switches from the closed state to the open state before the movable contact 30 separates from the fixed contact 25. Therefore, at the moment when the movable contact 30 separates from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is already blown with the arc-extinguishing gas. I have. The gas circuit breaker 1 of the present embodiment can quickly extinguish the arc 60. The gas circuit breaker 1 of the present embodiment has high arc extinguishing performance.

  The gas circuit breaker 1 of the present embodiment further includes a guide member (first guide member 37) for guiding the movable contact 30. The guide member (first guide member 37) defines at least a part of the flow path of the arc-extinguishing gas. The guide member (first guide member 37) converts the arc-extinguishing gas flowing from the second gas chamber 22 to the first gas chamber 20 into at least the first end 31 of the fixed contact 25 and the movable contact 30. Focus on one. The gas circuit breaker 1 of the present embodiment has a higher arc extinguishing performance.

  In the gas circuit breaker 1 according to the present embodiment, the gas blowing units (13, 16, 20, 22, 26, 55) are provided with a partition plate (the second plate) that separates the first gas chamber 20 and the second gas chamber 22 from each other. Partition plate 16). The partition plate (second partition plate 16) includes a first through hole 19 that fluidly connects the first gas chamber 20 and the second gas chamber 22, and a terminal plate (second terminal plate 17). Having. The valve 55 closes the through hole (first through hole 19) when the valve 55 is closed, and opens the through hole (first through hole 19) when the valve 55 is open. The movable contact 30 is electrically connected to a terminal plate (second terminal plate 17) via a guide member (first guide member 37).

  The gas circuit breaker 1 of the present embodiment is configured so that a current is supplied to the movable contact 30 from the outside of the gas circuit breaker 1, and is directed from the second gas chamber 22 to the first gas chamber 20. The arc-extinguishing gas flowing is blown intensively to at least one of the fixed contact 25 and the first end 31 of the movable contact 30. The gas circuit breaker 1 of the present embodiment has a higher arc extinguishing performance.

  The gas circuit breaker 1 of the present embodiment further includes an elastic member 40 connecting the movable contact 30 and the valve 55. When the valve 55 is closed, the elastic member 40 is compressed. The elastic member 40 allows the valve 55 to switch from the closed state to the open state before the movable contact 30 separates from the fixed contact 25. At the moment when the movable contact 30 separates from the fixed contact 25 and the arc 60 is generated, the elastic member 40 has already extinguished the arc-extinguishing gas on at least one of the fixed contact 25 and the first end 31 of the movable contact 30. Allows you to be sprayed. The gas circuit breaker 1 of the present embodiment has high arc extinguishing performance.

  The gas circuit breaker 1 according to the present embodiment includes a driving unit 53 and a movable member (first movable member 50) driven by the driving unit 53. The valve 55 is attached to a movable member (first movable member 50). The movable contact 30 is connected to a movable member (first movable member 50) via an elastic member 40. In the gas circuit breaker 1 of the present embodiment, the valve 55 switches from the closed state to the open state before the movable contact 30 separates from the fixed contact 25. At the moment when the movable contact 30 is separated from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is already blown with the arc-extinguishing gas. The gas circuit breaker 1 of the present embodiment has high arc extinguishing performance.

  In the gas circuit breaker 1 of the present embodiment, the movable contact 30 has a second end 32 opposite to the first end 31. The movable contact 30 is a cylindrical conductive member having an opening 31p at the first end 31 and a hole (second through hole 36) at the second end 32. The movable contact 30 having the opening 31p and the hole (the second through-hole 36) enables the arc-extinguishing gas to flow smoothly from the second gas chamber 22 to the first gas chamber 20. The gas circuit breaker 1 of the present embodiment has a higher arc extinguishing performance.

  In the gas circuit breaker 1 of the present embodiment, the movable contact 30 has a second end 32 opposite to the first end 31. The movable contact 30 is a cylindrical conductive member having an opening 31p at the first end 31 and a hole (second through hole 36) at the second end 32. The movable contact 30 slides on a guide member (first guide member 37). The movable contact 30 having the opening 31p and the hole (the second through-hole 36) enables the arc-extinguishing gas to flow smoothly from the second gas chamber 22 to the first gas chamber 20. The guide member (first guide member 37) converts the arc-extinguishing gas flowing from the second gas chamber 22 to the first gas chamber 20 into at least the first end 31 of the fixed contact 25 and the movable contact 30. Focus on one. The gas circuit breaker 1 of the present embodiment has a higher arc extinguishing performance. A current can be supplied to the movable contact 30 from the outside of the gas circuit breaker 1 via a guide member (first guide member 37).

  In the gas circuit breaker 1 according to the present embodiment, the gas blowing units (13, 16, 20, 22, 26, 55) direct the arc-extinguishing gas to at least one of the fixed contact 25 and the first end 31. And a nozzle 26 for guiding. The nozzle 26 concentrates the arc-extinguishing gas flowing from the second gas chamber 22 toward the first gas chamber 20 to at least one of the fixed contact 25 and the first end 31 of the movable contact 30. The gas circuit breaker 1 of the present embodiment has a higher arc extinguishing performance.

  The arc extinguishing method of the present embodiment includes separating the movable contact 30 that is in contact with the fixed contact 25 from the fixed contact 25. The arc extinguishing method according to the present embodiment is performed between the movable contact 30 and the fixed contact 25 before the movable contact 30 separates from the fixed contact 25 until the movable contact 30 separates from the fixed contact 25. The method further comprises continuously blowing the arc-extinguishing gas to at least one of the first ends 31 of the movable contact 30 of the present invention. In the arc extinguishing method of the present embodiment, at the moment when the movable contact 30 is separated from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is applied. Arc extinguishing gas has already been sprayed. According to the arc extinguishing method of the present embodiment, arc 60 can be extinguished quickly. The arc extinguishing method of the present embodiment has high arc extinguishing performance.

Embodiment 2 FIG.
The gas circuit breaker 1a according to the second embodiment will be described with reference to FIGS. The gas circuit breaker 1a of the present embodiment has the same configuration as the gas circuit breaker 1 of the first embodiment, but differs mainly in the following points.

  In the present embodiment, the gas blowing section (13, 16, 20, 22, 26, 55a) is provided with a first gas chamber 20 in which an arc-extinguishing gas having a first pressure is sealed, and a first pressure chamber. A second gas chamber 22 filled with an arc-extinguishing gas having a high second pressure, and a valve 55a. The gas blowing part (13, 16, 20, 22, 26, 55a) includes a first partition plate 13 that partitions the first gas chamber 23 and the second gas chamber 22, a first gas chamber 20, and a second gas chamber 20. And a nozzle 26 may be included.

  The valve 55a has the shape of a cup that opens to the movable contact 30 side. In the closed state of the valve 55a, the valve 55a fluidly shuts off the second gas chamber 22 and the inside 56 of the valve 55a from the first gas chamber 20. When the valve 55a is closed, the interior 56 of the valve 55a is in fluid communication with the second gas chamber 22. The valve 55a closes the first through hole 19 when the valve 55a is closed. Specifically, in the closed state of the valve 55a, the valve 55 is in close contact with the second partition plate 16 (the second terminal plate 17) via the sealing member 57, and closes the first through hole 19. In the closed state of the valve 55a, the arc-extinguishing gas having the second pressure is sealed in the interior 56 of the valve 55a. In the open state of the valve 55a, the valve 55a fluidly connects the second gas chamber 22 and the interior 56 of the valve 55a to the first gas chamber 20. In the open state of the valve 55a, the valve 55 separates from the second partition plate 16 (second terminal plate 17) and opens the first through hole 19.

  The elastic member 40 is housed in the interior 56 of the valve 55a. When the valve 55a is closed, the elastic member 40 is compressed. When the valve 55a is in the closed state, the elastic member 40 has a length shorter than the natural length of the elastic member 40.

  The gas circuit breaker 1a according to the present embodiment may further include a second movable member 51. The second movable member 51 connects the movable contact 30 and the elastic member 40. The second movable member 51 is attached to the second end 32 of the movable contact 30. The second movable member 51 moves integrally with the movable contact 30. The second movable member 51 may be an insulating rod. When the valve 55a is in the closed state, the second movable member 51 may be disposed in the first through hole 19 and the second inner peripheral portion 39 of the first guide member 37.

The operation of the gas circuit breaker 1a according to the present embodiment will be described.
In the closed state of the gas circuit breaker 1a (FIG. 4), the movable contact 30 is in contact with the fixed contact 25, and the valve 55a is configured such that the valve 55a connects the second gas chamber 22 and the inside 56 of the valve 55a to the first. Is in a closed state where it is fluidly shut off from the gas chamber 20. In the closed state of the valve 55a, the elastic member 40 is compressed and urges the movable contact 30 toward the fixed contact 25. The fixed contact 25 may contact the first end 31 of the movable contact 30. When the valve 55a is closed, the interior 56 of the valve 55a is in fluid communication with the second gas chamber 22. The pressure of the arc-extinguishing gas in the interior 56 of the valve 55a is equal to the second pressure of the arc-extinguishing gas sealed in the second gas chamber 22. An arc-extinguishing gas having a second pressure is sealed in the interior 56 of the valve 55a. The valve 55a is in close contact with the second partition plate 16 (second terminal plate 17). The valve 55a prevents the arc-extinguishing gas from flowing from the second gas chamber 22 and the inside 56 of the valve 55a to the first gas chamber 20.

  In the course of opening the gas circuit breaker 1a (FIG. 5), the drive unit 53 drives the first movable member 50, and the valve 55a switches from the closed state to the open state. The valve 55a is separated from the second partition plate 16 (second terminal plate 17). The elastic member 40 is also compressed during the opening process of the gas circuit breaker 1 a, and the elastic member 40 continues to urge the movable contact 30 and the second movable member 51 toward the fixed contact 25. The movable contact 30 keeps in contact with the fixed contact 25 even in the process of opening the gas circuit breaker 1a.

  The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. At least one of the movable contact 30 and the fixed contact 25 is such that even if the movable contact 30 is in contact with the fixed contact 25, the first inner peripheral portion 38 of the movable contact 30 is the first inner peripheral portion 38 of the movable contact 30. It is configured to fluidly communicate with the second gas chamber 22 outside the end 31. When the valve 55a switches from the closed state to the open state, the arc-extinguishing gas flows from the second gas chamber 22 to the first gas chamber 20. At least one of the fixed contact 25 and the first end 31 of the movable contact 30 is disposed in a flow path of the arc-extinguishing gas formed when the valve 55a is open. Before the movable contact 30 separates from the fixed contact 25, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is blown with an arc-extinguishing gas.

  The interior 56 of the valve 55a has a higher arc-extinguishing gas pressure than the first gas chamber 20. When the valve 55a switches from the closed state to the open state, the arc-extinguishing gas flows from the inside 56 of the valve 55a to the first gas chamber 20.

  As shown in FIG. 6, when the drive unit 53 further drives the first movable member 50 and the valve 55a further moves, the elastic member 40 becomes longer than the natural length of the elastic member 40. The movable contact 30 and the second movable member 51 are pulled by the elastic member 40 and start moving. The movable contact 30 is separated from the fixed contact 25, and the gas circuit breaker 1a is opened. Since the second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20, even when the gas circuit breaker 1a is open (FIG. 6), the fixed contact 25 and the movable contact 25 are provided. Arc extinguishing gas is still blown on at least one of the first ends 31 of 30.

  As described above, from the time before the movable contact 30 separates from the fixed contact 25 to the time after the movable contact 30 separates from the fixed contact 25, the first ends 31 of the fixed contact 25 and the movable contact 30 are changed. At least one arc-extinguishing gas is continuously blown. The gas circuit breaker 1a according to the present embodiment includes at least one of the fixed contact 25 and the first end 31 of the movable contact 30 at the moment when the movable contact 30 is separated from the fixed contact 25 and an arc 60 is generated. It is configured such that the arc-extinguishing gas has already been blown to the fin. The gas circuit breaker 1a of the present embodiment can quickly extinguish the arc 60.

  The interior 56 of the valve 55a has a higher arc-extinguishing gas pressure than the first gas chamber 20. Even when the gas circuit breaker 1a is open (FIG. 6), the arc-extinguishing gas continues to flow from the inside 56 of the valve 55a to the first gas chamber 20. The arc-extinguishing gas flowing from the interior 56 of the valve 55a toward the first gas chamber 20 prevents the high-temperature arc-extinguishing gas heated by the arc 60 from being blown to the elastic member 40. The arc-extinguishing gas flowing from the interior 56 of the valve 55a toward the first gas chamber 20 causes the high-temperature arc-extinguishing gas heated by the arc 60 to damage the elastic member 40 and change the elastic characteristic of the elastic member 40. Can be prevented.

  The effects of the gas circuit breaker 1a of the present embodiment have the following effects in addition to the effects of the gas circuit breaker 1 of the first embodiment.

  In the gas circuit breaker 1a according to the present embodiment, the valve 55a has a shape of a cup that opens to the movable contact 30 side. The elastic member 40 is housed in the interior 56 of the valve 55a. In the closed state of the valve 55a, the arc-extinguishing gas having the second pressure is sealed in the interior 56 of the valve 55a.

  In the gas circuit breaker 1a of the present embodiment, when the movable contact 30 is separated from the fixed contact 25 and an arc 60 is generated, the arc-extinguishing gas flows from the inside 56 of the valve 55a to the first gas chamber 20. . The arc-extinguishing gas flowing from the interior 56 of the valve 55a toward the first gas chamber 20 prevents the high-temperature arc-extinguishing gas heated by the arc 60 from being blown to the elastic member 40. The arc-extinguishing gas flowing from the interior 56 of the valve 55a toward the first gas chamber 20 causes the high-temperature arc-extinguishing gas heated by the arc 60 to damage the elastic member 40 and change the elastic characteristic of the elastic member 40. Can be prevented. The gas circuit breaker 1a according to the present embodiment has high arc extinguishing performance and long life.

Embodiment 3 FIG.
Third Embodiment A gas circuit breaker 1b according to a third embodiment will be described with reference to FIGS. The gas circuit breaker 1b of the present embodiment has the same configuration as the gas circuit breaker 1 of the first embodiment, but differs mainly in the following points.

  The gas circuit breaker 1b according to the present embodiment further includes a limiting member 70 that limits the length of the elastic member 40 to the natural length of the elastic member 40 or less. The length of the elastic member 40 in the closed state (FIGS. 7 and 8), the open process (FIGS. 9 and 10), and the open state (FIGS. 11 and 12) of the gas circuit breaker 1b is limited. The extension of the elastic member 40 is limited so as to be limited to the natural length or less. The gas circuit breaker 1b according to the present embodiment may further include a second movable member 51.

  The restriction member 70 may include a first plate 71, a second plate 72, a second guide member 75, and a stopper 76. The first plate 71 may be attached to the first movable member 50. The first plate 71 may move integrally with the first movable member 50. The second plate 72 may be attached to the second movable member 51. The second plate 72 may move integrally with the second movable member 51. In the closed state of the valve 55 (FIG. 7), the restricting member 70 may be disposed in the second inner peripheral portion 39 of the first guide member 37.

  The second guide member 75 guides the first plate 71 and the second plate 72. The first plate 71 and the second plate 72 slide on the second guide member 75. The second guide member 75 may be a rod-shaped member. The second guide member 75 may be inserted into a hole (not shown) provided in each of the first plate 71 and the second plate 72.

  The stopper 76 limits the movable range of the first plate 71 and the second plate 72. The stopper 76 may be a member having a larger diameter than the second guide member 75. The stoppers 76 may be provided at both ends of the second guide member 75.

  The second movable member 51 connects the movable contact 30 and the limiting member 70. The second movable member 51 is attached to the second end 32 of the movable contact 30 and the restricting member 70 (second plate 72). The second movable member 51 may move integrally with the movable contact 30 and the second plate 72. The second movable member 51 may be an insulating rod. In the closed state of the valve 55 (FIG. 7), the second movable member 51 may be arranged in the second inner peripheral portion 39 of the first guide member 37.

The operation of the gas circuit breaker 1b according to the present embodiment will be described.
In the closed state (FIGS. 7 and 8) of the gas circuit breaker 1b, the movable contact 30 has the movable contact 30 in contact with the fixed contact 25, and the valve 55 has the valve 55 connected to the second gas chamber 22. Is closed from the first gas chamber 20 in a fluid state. In the closed state of the valve 55, the elastic member 40 is compressed and urges the movable contact 30 toward the fixed contact 25. The fixed contact 25 may contact the first end 31 of the movable contact 30. The valve 55 is in close contact with the second partition plate 16 (second terminal plate 17). The valve 55 prevents the extinguishing gas from flowing from the second gas chamber 22 to the first gas chamber 20.

  In the course of opening the gas circuit breaker 1b (FIGS. 9 and 10), the drive unit 53 drives the first movable member 50, and the valve 55 switches from the closed state to the open state. The valve 55 is separated from the second partition plate 16 (second terminal plate 17). Also in the process of opening the gas circuit breaker 1b, the length of the elastic member 40 is limited by the restriction member 70 to be equal to or less than the natural length of the elastic member 40. The elastic member 40 keeps urging the movable contact 30 and the second movable member 51 toward the fixed contact 25 also in the course of opening the gas circuit breaker 1b (FIGS. 9 and 10). The movable contact 30 keeps in contact with the fixed contact 25 even in the process of opening the gas circuit breaker 1b.

  The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. At least one of the movable contact 30 and the fixed contact 25 is such that even if the movable contact 30 is in contact with the fixed contact 25, the first inner peripheral portion 38 of the movable contact 30 is the first inner peripheral portion 38 of the movable contact 30. It is configured to fluidly communicate with the second gas chamber 22 outside the end 31. When the valve 55 switches from the closed state to the open state, the arc-extinguishing gas flows from the second gas chamber 22 to the first gas chamber 20. At least one of the fixed contact 25 and the first end 31 of the movable contact 30 is arranged in a flow path of the arc-extinguishing gas formed when the valve 55 is open. Before the movable contact 30 separates from the fixed contact 25, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is blown with an arc-extinguishing gas.

  As shown in FIGS. 11 and 12, when the drive unit 53 further drives the first movable member 50 and the valve 55 further moves, the first plate 71 and the second plate 72 contact the stopper 76, The second movable member 51 starts to move integrally with the limiting member 70 and the first movable member 50. The movable contact 30 moves together with the second movable member 51, the limiting member 70, and the first movable member 50. The movable contact 30 moves away from the fixed contact 25. Thus, the gas circuit breaker 1b is in an open circuit state. Since the second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20, even when the gas circuit breaker 1b is in the open state (FIGS. 11 and 12), the fixed contacts 25 and At least one of the first ends 31 of the movable contact 30 is still blown with the arc-extinguishing gas. Even in the open state of the gas circuit breaker 1b (FIGS. 11 and 12), the length of the elastic member 40 is limited by the restricting member 70 to be equal to or less than the natural length of the elastic member 40.

  As described above, from the time before the movable contact 30 separates from the fixed contact 25 to the time after the movable contact 30 separates from the fixed contact 25, the first ends 31 of the fixed contact 25 and the movable contact 30 are changed. At least one arc-extinguishing gas is continuously blown. At the moment when the movable contact 30 separates from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is provided. It is configured such that the arc-extinguishing gas has already been blown to the fin. The gas circuit breaker 1b according to the present embodiment can quickly extinguish the arc 60.

  The effects of the gas circuit breaker 1b of the present embodiment have the following effects in addition to the effects of the gas circuit breaker 1 of the first embodiment.

  The gas circuit breaker 1b according to the present embodiment further includes a limiting member 70 that limits the length of the elastic member 40 to the natural length of the elastic member 40 or less. The restricting member 70 prevents the elastic member 40 from extending beyond the natural length of the elastic member 40 and then significantly contracting. In the gas circuit breaker 1b of the present embodiment, the movable contact 30 is fixedly contacted by the elastic member 40 which expands and contracts in the opening process (FIGS. 9 and 10) and in the open state (FIGS. 11 and 12) of the gas circuit breaker 1b. Contact with the child 25 again can be prevented. The gas circuit breaker 1b of the present embodiment can prevent the current interrupting performance from deteriorating in the opening process (FIGS. 9 and 10) and the open state (FIGS. 11 and 12) of the gas circuit breaker 1b. .

Embodiment 4 FIG.
Fourth Embodiment A gas circuit breaker 1c according to a fourth embodiment will be described with reference to FIGS. The gas circuit breaker 1c of the present embodiment has the same configuration as the gas circuit breaker 1 of the first embodiment, but differs mainly in the following points.

  In the gas circuit breaker 1c of the present embodiment, the movable contact 30c includes the conductive rod member 33. The movable contact 30c (conductive rod member 33) has a first end 31c on the fixed contact 25c side and a second end 32c on the opposite side to the first end 31c. The second end 32 c of the movable contact 30 c (conductive rod member 33) is attached to the first movable member 50. The valve 55 and the movable contact 30c (the conductive rod member 33) are attached to the first movable member 50. The valve 55 and the movable contact 30c (the conductive rod member 33) move integrally with the first movable member 50.

  In the gas circuit breaker 1c of the present embodiment, the movable contact 30c may further include a conductive sliding member 34. The conductive sliding member 34 is attached to the conductive rod member 33. The conductive sliding member 34 moves integrally with the conductive rod member 33. The conductive sliding member slides on the first guide member 37. The movable contact 30 may slide on the inner peripheral portion (the third inner peripheral portion 38c, the second inner peripheral portion 39c) of the first guide member 37. The movable contact 30c is electrically connected to the second conductor 6. Specifically, the movable contact 30c is electrically connected to the second conductor 6 via the second conductive member 8, the second terminal plate 17, the first guide member 37, and the conductive sliding member. .

  The conductive sliding member 34 includes a third inner peripheral portion 38c of the first guide member 37 adjacent to the first end 31c of the conductive sliding member 34 and a first inner peripheral portion 38c of the conductive sliding member 34 adjacent to the valve 55. The guide member 37 is configured to fluidly communicate with the second inner peripheral portion 39c. For example, the conductive sliding member 34 is adjacent to the third inner peripheral portion 38c of the first guide member 37 adjacent to the first end 31c of the conductive sliding member 34, and adjacent to the valve 55 of the conductive sliding member 34. The first guide member 37 may have a second through hole 36c communicating with the second inner peripheral portion 39c.

  In the closed state of the valve 55, the fixed contact 25c is in contact with the side surface of the conductive rod member 33 away from the first end 31c. The fixed contact 25c may be a finger contact.

  In the present embodiment, the gas blowing unit (13, 16, 20, 22, 26c, 55) is provided with a first gas chamber 20 in which an arc-extinguishing gas having a first pressure is filled, and a first pressure chamber. A second gas chamber 22 filled with an arc-extinguishing gas having a higher second pressure, and a valve 55. The gas blowing section (13, 16, 20, 22, 26c, 55) includes a first partition plate 13 that partitions the first gas chamber 23 and the second gas chamber 22, a first gas chamber 20, and a second gas chamber 20. May be included, and the second partition plate 16 for partitioning the gas chamber 22 of the second embodiment and the nozzle 26c.

  The nozzle 26c may be attached to the first guide member 37. Specifically, the base 27c of the nozzle 26c may be attached to the end of the first guide member 37 on the fixed contact 25c side. The protrusion 28c may surround the end of the fixed contact 25c on the movable contact 30c side. In the closed state (FIG. 13) and the open circuit process (FIG. 14) of the gas circuit breaker 1c, the protruding portion 28c may surround the first end 31c of the movable contact 30c. In the closed state (FIG. 13) and the open circuit process (FIG. 14) of the gas circuit breaker 1c, the projecting portion 28c may surround the contact portion between the fixed contact 25c and the movable contact 30c.

  The protruding portion 28c is arranged with a gap from the fixed contact 25c. In the open state of the valve 55 shown in FIG. 14 and FIG. Flow towards one. The nozzle 26c concentrates the arc-extinguishing gas flowing from the second gas chamber 22 to the first gas chamber 20 to at least one of the fixed contact 25c and the first end 31c of the movable contact 30c.

The operation of the gas circuit breaker 1c according to the present embodiment will be described.
In the closed state (FIG. 13) of the gas circuit breaker 1c, the movable contact 30c is in contact with the fixed contact 25c, and the valve 55 is connected to the second gas chamber 22 by the first valve. Is in a closed state where it is fluidly shut off from the gas chamber 20. In the closed state of the valve 55, the fixed contact 25c is in contact with the side surface of the movable contact 30c (conductive bar member 33) apart from the first end 31c. The valve 55 is in close contact with the second partition plate 16 (second terminal plate 17). The valve 55 prevents the extinguishing gas from flowing from the second gas chamber 22 to the first gas chamber 20.

  In the course of opening the gas circuit breaker 1c (FIG. 14), the drive unit 53 drives the first movable member 50, and the valve 55 switches from the closed state to the open state. The valve 55 is separated from the second partition plate 16 (second terminal plate 17). When the first movable member 50 moves, the movable contact 30c (the conductive rod member 33) also moves. Also during the opening process of the gas circuit breaker 1c, the fixed contact 25c continues to contact the side surface of the movable contact 30c (the conductive rod member 33). The movable contact 30c keeps in contact with the fixed contact 25c even in the process of opening the gas circuit breaker 1c.

  The second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20. At least one of the movable contact 30c and the fixed contact 25c has the first inner peripheral portion 38 of the movable contact 30c on the first end 31 side even if the movable contact 30c is in contact with the fixed contact 25c. It is configured to fluidly communicate with the second gas chamber 22 outside the movable contact 30c. When the valve 55 switches from the closed state to the open state, the arc-extinguishing gas flows from the second gas chamber 22 to the first gas chamber 20. At least one of the fixed contact 25c and the first end 31c of the movable contact 30c is arranged in the arc-extinguishing gas flow path formed when the valve 55 is open. Before the movable contact 30c separates from the fixed contact 25c, at least one of the fixed contact 25c and the first end 31c of the movable contact 30c is blown with the arc-extinguishing gas.

  As shown in FIG. 15, when the drive unit 53 further drives the first movable member 50 and the valve 55 and the movable contact 30c further move, the movable contact 30c moves away from the fixed contact 25c. Thus, the gas circuit breaker 1c is in an open circuit state. Since the second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20, even when the gas circuit breaker 1c is open (FIG. 15), the fixed contact 25c and the movable contact The arc-extinguishing gas is still blown on at least one of the first ends 31c of 30c.

  As described above, from before the movable contact 30c separates from the fixed contact 25c to after the movable contact 30c separates from the fixed contact 25c, the first end 31c of the fixed contact 25c and the movable contact 30c is removed. At least one arc-extinguishing gas is continuously blown. The gas circuit breaker 1c according to the present embodiment includes at least one of the fixed contact 25c and the first end 31c of the movable contact 30c at the moment when the movable contact 30c is separated from the fixed contact 25c and an arc 60 is generated. It is configured such that the arc-extinguishing gas has already been blown to the fin. The gas circuit breaker 1c of the present embodiment can quickly extinguish the arc 60.

  The effects of the gas circuit breaker 1c of the present embodiment have the following effects in addition to the effects of the gas circuit breaker 1 of the first embodiment.

  In the gas circuit breaker 1c of the present embodiment, the movable contact 30c includes the conductive rod member 33. In the closed state of the valve 55, the fixed contact 25c is in contact with the side surface of the conductive rod member 33 away from the first end 31c. Therefore, before the movable contact 30c separates from the fixed contact 25c, the valve 55 switches from the closed state to the open state. The gas circuit breaker 1c according to the present embodiment includes at least one of the fixed contact 25c and the first end 31c of the movable contact 30c at the moment when the movable contact 30c is separated from the fixed contact 25c and an arc 60 is generated. It is configured so that the arc-extinguishing gas is already blown to the gas. The gas circuit breaker 1c of the present embodiment has high arc extinguishing performance.

  In the gas circuit breaker 1c of the present embodiment, the movable contact 30c includes a conductive sliding member 34 that slides on a guide member (first guide member 37), and a conductive rod member 33 attached to the conductive sliding member 34. And In the closed state of the valve 55, the fixed contact 25c contacts the side surface of the conductive rod member 33 away from the first end 31c. The conductive sliding member 34 includes a first inner peripheral portion (third inner peripheral portion 38c) of a guide member (first guide member 37) adjacent to the first end portion 31c side of the conductive sliding member 34 and a conductive sliding member. It is configured to fluidly communicate with the second inner peripheral portion 39c of the guide member (first guide member 37) adjacent to the valve 55 side of the valve.

  Before the movable contact 30c separates from the fixed contact 25c, the valve 55 switches from the closed state to the open state. The gas circuit breaker 1c according to the present embodiment includes at least one of the fixed contact 25c and the first end 31c of the movable contact 30c at the moment when the movable contact 30c is separated from the fixed contact 25c and an arc 60 is generated. It is configured so that the arc-extinguishing gas is already blown to the gas. The guide member (the first guide member 37) transmits the arc-extinguishing gas flowing from the second gas chamber 22 toward the first gas chamber 20 to at least the first end 31c of the fixed contact 25c and the movable contact 30c. Focus on one. The gas circuit breaker 1c of the present embodiment has a higher arc extinguishing performance. The movable contact 30 c including the conductive sliding member 34 can smoothly flow the arc-extinguishing gas from the second gas chamber 22 to the first gas chamber 20. A current can be supplied to the conductive rod member 33 from the outside of the gas circuit breaker 1c via the guide member (first guide member 37) and the conductive sliding member.

  The gas circuit breaker 1c according to the present embodiment includes a driving unit 53 and a movable member driven by the driving unit 53. The valve 55 and the movable contact 30c are attached to a movable member. In the gas circuit breaker 1c of the present embodiment, the valve 55 switches from the closed state to the open state before the movable contact 30c separates from the fixed contact 25c. At the moment when the movable contact 30c separates from the fixed contact 25c and the arc 60 is generated, at least one of the fixed contact 25c and the first end 31c of the movable contact 30c is already blown with the arc-extinguishing gas. The gas circuit breaker 1c of the present embodiment has high arc extinguishing performance.

Embodiment 5 FIG.
A gas circuit breaker 1d according to Embodiment 5 will be described with reference to FIG. The gas circuit breaker 1d of the present embodiment has the same configuration as the gas circuit breaker 1 of the first embodiment, but differs mainly in the following points.

  In the present embodiment, the gas blowing units (13d, 16d, 20, 22, 23, 24, 26, 55) are provided with first gas chambers 20, 24 in which arc-extinguishing gas having a first pressure is filled. , A second gas chamber 22 filled with an arc-extinguishing gas having a second pressure higher than the first pressure, and a valve 55. The gas blowing section (13d, 16d, 20, 22, 23, 24, 26, 55) is a first partition plate that partitions the first gas chamber 23, the first gas chamber 23 and the second gas chamber 22. 13d, a second partition plate 16d for partitioning the first gas chamber 20 and the second gas chamber 22 and a nozzle 26 may be included.

  In the gas circuit breaker 1d of the present embodiment, the first gas chambers 20, 23, 24 and the second gas chamber 22 may be formed by partitioning the internal space of the gas tank 9d. Specifically, the first gas chambers 20, 23, 24 and the second gas chamber 22 are formed by the first partition plate 13d, the second partition plate 16d, and the first tubular member 12 in the internal space of the gas tank 9d. May be formed by partitioning.

  The outer wall (10, 11d) of the gas tank 9d includes a first outer wall 10 and a second outer wall 11d. The first outer wall 10 is in contact with the first gas chamber 23 on the side of the first partition 13d and the first gas chamber 20 on the side of the second partition 16d. The second outer wall 11d is in contact with the first gas chamber 24. The second outer wall 11d may connect the first outer wall 10 in contact with the first gas chamber 23 and the first outer wall 10 in contact with the first gas chamber 20.

  The second gas chamber 22 is isolated from the outer wall (10, 11d) of the gas tank 9d. The second gas chamber 22 is not in contact with the outer wall (10, 11d) of the gas tank 9d. Specifically, the second gas chamber 22 is isolated from the outer wall (10, 11d) of the gas tank 9d by the first partition plate 13d, the second partition plate 16d, and the first tubular member 12. The second gas chamber 22 is partitioned by the first partition plate 13d, the second partition plate 16d, and the first cylindrical member 12. The first cylindrical member 12 is in close contact with the first partition plate 13d (first terminal plate 14) and the second partition plate 16d (first terminal plate 14). When the valve 55 is in a closed state in which the second gas chamber 22 is fluidly shut off from the first gas chamber 20 (FIG. 16), the second gas chamber 22 includes the first partition plate 13d and the second partition plate. 16d, the valve 55 and the first cylindrical member 12 are hermetically closed. The first tubular member 12 may have electrical insulation.

  The first gas chamber 24 between the first cylindrical member 12 and the second outer wall 11d of the gas tank 9d may fluidly communicate with the first gas chamber 20 on the second partition 16d side. The second insulating spacer 18d is configured such that the first gas chamber 24 between the first cylindrical member 12 and the second outer wall 11d of the gas tank 9d is fluidly connected to the first gas chamber 20 on the second partition plate 16d side. May be configured to communicate with. For example, the second insulating spacer 18d connects the first gas chamber 24 between the first cylindrical member 12 and the second outer wall 11d of the gas tank 9d and the first gas chamber 20 on the second partition plate 16d side. It may have a through hole (not shown) for connection.

  The first gas chamber 24 between the first cylindrical member 12 and the second outer wall 11d of the gas tank 9d may be in fluid communication with the first gas chamber 23 on the first partition 13d side. The first insulating spacer 15d is configured such that the first gas chamber 24 between the first cylindrical member 12 and the second outer wall 11d of the gas tank 9d is fluidly connected to the first gas chamber 23 on the first partition plate 13d side. May be configured to communicate with. For example, the first insulating spacer 15d connects the first gas chamber 24 between the first cylindrical member 12 and the second outer wall 11d of the gas tank 9d and the first gas chamber 23 on the first partition plate 13d side. It may have a through hole (not shown) for connection.

  The second gas chamber 22 may be surrounded by the first gas chambers 20, 23, 24. The second outer wall 11d of the gas tank 9d in contact with the first gas chamber 24 has the same thickness as the first outer wall 10 of the gas tank 9d in contact with the first gas chamber 23 and the first gas chamber 20. Is also good.

  The effects of the gas circuit breaker 1d of the present embodiment have the following effects in addition to the effects of the gas circuit breaker 1 of the first embodiment.

  In the gas circuit breaker 1d of the present embodiment, the first gas chambers 20, 23, and 24 and the second gas chamber 22 are formed by partitioning the internal space of the gas tank 9d. The second gas chamber 22 is isolated from the outer wall (10, 11d) of the gas tank 9d. Therefore, in the gas circuit breaker 1d of the present embodiment, a gas tank 9d having a thin outer wall (10, 11d), similar to the conventional case, can be used. According to the gas circuit breaker 1d of the present embodiment, the structural design of the gas tank 9d can be simplified.

Embodiment 6 FIG.
Embodiment 6 A gas circuit breaker 1e according to Embodiment 6 will be described with reference to FIGS. The gas circuit breaker 1e of the present embodiment has the same configuration as the gas circuit breaker 1a of the second embodiment, but differs mainly in the following points.

  The gas circuit breaker 1e according to the present embodiment further includes a first tubular member 12 and a second tubular member 12e. The first cylindrical member 12 according to the present embodiment has the same configuration as the first cylindrical member 12 according to the fifth embodiment. In the present embodiment, a gas tank 9d including a second outer wall 11d according to the fifth embodiment is used instead of the gas tank 9 including the second outer wall 11 according to the second embodiment. In the present embodiment, the first partition 13, the first insulating spacer 15, the second partition 16, and the second insulating spacer 18 of the second embodiment are replaced with the first partition 13 d of the fifth embodiment, The first insulating spacer 15d, the second partition plate 16d, and the second insulating spacer 18d are used. Similarly to the fifth embodiment, the first partition plate 13d partitions the first gas chamber 23 from the second gas chamber 22. Similarly to the fifth embodiment, the first gas chambers 20, 23, 24 and the second gas chamber 22 are formed by the first partition plate 13d, the second partition plate 16d, and the first cylindrical member 12 in the gas tank 9d. It is formed by partitioning the internal space.

  The first gas chamber 20 includes a first sub gas chamber 20f and a second sub gas chamber 20g. The first sub gas chamber 20f is between the second gas chamber 22 and the second sub gas chamber 20g. The second cylinder member 12e divides the first gas chamber 20 into a first sub gas chamber 20f and a second sub gas chamber 20g. The first tubular member 12 and the second tubular member 12e may be integrated. The second tubular member 12e may have electrical insulation. The second cylindrical member 12e has a third through hole 19f. The first movable member 50 passes through the third through hole 19f. The second cylinder member 12e may include a sealing member 58 such as an O-ring on the surface of the second cylinder member 12e facing the valve 55a. As shown in FIG. 20, when the valve 55a is in the second open state in which the first sub-gas chamber 20f is fluidly shut off from the second sub-gas chamber 20g, the sealing member 58 connects the valve 55a to the second sub-gas chamber 20f. The arc extinguishing gas is prevented from leaking from between the second cylindrical member 12e. The sealing member 58 may be disposed in a recess provided on the surface of the second cylindrical member 12e facing the valve 55a.

  The valve 55a has a closed state in which the valve 55a fluidly shuts off the second gas chamber 22 from the first sub-gas chamber 20f (FIG. 17), and the valve 55a connects the second gas chamber 22 to the first sub-gas chamber 20f. It is configured to be switchable between an open state (FIGS. 18 to 20) that fluidly communicates with. The open state is the first state in which the valve 55a fluidly connects the second gas chamber 22 to the first sub-gas chamber 20f and fluidly connects the first sub-gas chamber 20f to the second sub-gas chamber 20g. 18 and FIG. 19, the valve 55a fluidly connects the second gas chamber 22 to the first sub-gas chamber 20f, and connects the first sub-gas chamber 20f to the second sub-gas chamber 20g. And a second open state (FIG. 20) that fluidly shuts off the The valve 55a is configured to be switchable between a first open state and a second open state. That is, the valve 55a is configured to be switchable between a closed state, a first open state, and a second open state.

  Specifically, when the valve 55a is in the closed state (FIG. 17), the valve 55a is in close contact with the second partition plate 16 (second terminal plate 17) via the sealing member 57, and the first through hole 19 is formed. Close. When the valve 55a is closed, the valve 55a is apart from the second cylindrical member 12e and opens the third through hole 19f.

  The valve 55a separates from the second partition plate 16 (second terminal plate 17) and opens the first through hole 19 when the valve 55a is in the first open state (FIGS. 18 and 19). When the valve 55a is in the first open state, the valve 55a is separated from the second cylindrical member 12e and opens the third through hole 19f. At least one of the fixed contact 25 and the first end 31 is disposed in the arc-extinguishing gas flow path formed when the valve 55a is in the first open state. As shown in FIG. 18, the valve 55a is configured to switch from the closed state to the first open state before the movable contact 30 separates from the fixed contact 25. As shown in FIGS. 18 and 19, the gas blowing portions (13, 16, 20, 22, 23, 24, 26, 55a) are provided at least at the first end 31 of the fixed contact 25 and the movable contact 30. Blow off the arc-extinguishing gas to one. The gas blowing portions (13, 16, 20, 22, 23, 24, 26, 55a) are provided before the movable contact 30 separates from the fixed contact 25 and after the movable contact 30 separates from the fixed contact 25. During this time, it is configured to continue blowing the arc-extinguishing gas to at least one of the fixed contact 25 and the first end 31 of the movable contact 30.

  When the valve 55a is in the second open state (FIG. 20), the valve 55a is in close contact with the second cylindrical member 12e via the sealing member 58 and closes the third through hole 19f. The valve 55a is separated from the second partition plate 16 (second terminal plate 17) and opens the first through hole 19 in the second open state of the valve 55a. As shown in FIG. 20, the valve 55a is configured to switch from the first open state to the second open state after the movable contact 30 separates from the fixed contact 25. Therefore, after the arc 60 is extinguished, the arc-extinguishing gas having a high pressure is prevented from continuing to flow from the second gas chamber 22 to the second sub-gas chamber 20g.

The operation of the gas circuit breaker 1e according to the present embodiment will be described.
Similarly to the gas circuit breaker 1a of the second embodiment, in the closed state (FIG. 17) of the gas circuit breaker 1e of the present embodiment, the movable contact 30 is in contact with the fixed contact 25, and the valve 55a is The valve 55a is in a closed state that fluidly shuts off the second gas chamber 22 and the inside 56 of the valve 55a from the first sub-gas chamber 20f. The valve 55a prevents the extinguishing gas from flowing from the second gas chamber 22 and the inside 56 of the valve 55a to the first gas chamber 20 (the first sub gas chamber 20f and the second sub gas chamber 20g). In the closed state of the gas circuit breaker 1e (FIG. 17), the valve 55a is separated from the second cylindrical member 12e and opens the third through hole 19f.

  Similarly to the gas circuit breaker 1a of the second embodiment, the valve 55a switches from the closed state to the open state in the course of opening the circuit breaker 1e of the present embodiment (FIG. 18). Specifically, the valve 55a switches from the closed state to the first open state. The valve 55a separates from the second partition plate 16 (second terminal plate 17) and opens the first through hole 19. The valve 55a is separated from the second cylindrical member 12e, and opens the third through hole 19f. The movable contact 30 keeps in contact with the fixed contact 25 also in the process of opening the gas circuit breaker 1e (FIG. 18). When the valve 55a switches from the closed state to the first open state, the arc-extinguishing gas flows from the second gas chamber 22 and the interior 56 of the valve 55a to the first gas chamber 20 (the first sub-gas chamber 20f and the second gas chamber 20f). It flows into the sub gas chamber 20g). At least one of the fixed contact 25 and the first end 31 of the movable contact 30 is disposed in the arc-extinguishing gas flow path formed when the valve 55a is in the first open state. Before the movable contact 30 separates from the fixed contact 25, at least one of the fixed contact 25 and the first end 31 of the movable contact 30 is blown with an arc-extinguishing gas.

  As shown in FIG. 19, when the drive unit 53 further drives the first movable member 50 and the valve 55a further moves, the elastic member 40 becomes longer than the natural length of the elastic member 40. The movable contact 30 and the second movable member 51 are pulled by the elastic member 40 and start moving. The movable contact 30 is separated from the fixed contact 25, and the gas circuit breaker 1e is opened. Since the second gas chamber 22 has a higher arc-extinguishing gas pressure than the first gas chamber 20 (the first sub gas chamber 20f and the second sub gas chamber 20g), the open state of the gas circuit breaker 1e is set. In FIG. 19 as well, the arc-extinguishing gas is still blown to at least one of the fixed contact 25 and the first end 31 of the movable contact 30.

  As described above, from the time before the movable contact 30 separates from the fixed contact 25 to the time after the movable contact 30 separates from the fixed contact 25, the first ends 31 of the fixed contact 25 and the movable contact 30 are changed. At least one arc-extinguishing gas is continuously blown. At the moment when the movable contact 30 separates from the fixed contact 25 and the arc 60 is generated, at least one of the fixed contact 25 and the first end portion 31 of the movable contact 30 is provided. Is configured so that the arc-extinguishing gas has already been blown. The gas circuit breaker 1e according to the present embodiment can quickly extinguish the arc 60.

  As shown in FIG. 20, when the drive unit 53 further drives the first movable member 50 to further move the valve 55a, the valve 55a switches from the first open state to the second open state. The valve 55a is in close contact with the second cylindrical member 12e via the sealing member 58, and closes the third through hole 19f. Therefore, after the arc 60 is extinguished, the arc-extinguishing gas having a high pressure is prevented from continuing to flow from the second gas chamber 22 to the second sub-gas chamber 20g. The valve 55a is separated from the second partition plate 16 (second terminal plate 17) and opens the first through hole 19 in the second open state of the valve 55a.

  In the closing process of the gas circuit breaker 1e in which the gas circuit breaker 1e transitions from the open state shown in FIG. 20 to the closed state shown in FIG. 17, first, the valve 55a is switched from the second open state (FIG. 20) to the first state. It switches to the open state (FIG. 19). Then, the movable contact 30 contacts the fixed contact 25 as shown in FIG. Next, the valve 55a is switched from the first open state to the closed state (FIG. 17), and the second gas chamber 22 is connected to the first gas chamber 20 (the first sub gas chamber 20f and the second sub gas chamber 20g). ) Is fluidly isolated from Then, the pump 63 sends the arc-extinguishing gas sealed in the first gas chamber 20 (the first sub-gas chamber 20f and the second sub-gas chamber 20g) to the second gas chamber 22. When the gas circuit breaker 1e transitions from the closed state shown in FIG. 17 to the open state shown in FIGS. 18 and 19, the arc-extinguishing gas flowing out of the second gas chamber 22 toward the second sub-gas chamber 20g is removed. , The pump 63 returns to the second gas chamber 22. The pump 63 decreases the pressure of the arc-extinguishing gas in the first gas chamber 20 and increases the pressure of the arc-extinguishing gas in the second gas chamber 22.

  The effects of the gas circuit breaker 1e of the present embodiment have the following effects in addition to the effects of the gas circuit breaker 1a of the second embodiment.

  In the gas circuit breaker 1e according to the present embodiment, the gas blowing section (13, 16, 20, 22, 23, 24, 26, 55a) is provided with the first gas in which the arc-extinguishing gas having the first pressure is filled. It includes a chamber 20, a second gas chamber 22 in which an arc-extinguishing gas having a second pressure higher than the first pressure is filled, and a valve 55a. The first gas chamber 20 includes a first sub gas chamber 20f and a second sub gas chamber 20g. The first sub gas chamber 20f is between the second gas chamber 22 and the second sub gas chamber 20g. The valve 55a is in a closed state in which the valve 55a fluidly shuts off the second gas chamber 22 from the first sub-gas chamber 20f, and the valve 55a fluidly connects the second gas chamber 22 to the first sub-gas chamber 20f. It is configured to be switchable between an open state for communication.

  The open state is the first state in which the valve 55a fluidly connects the second gas chamber 22 to the first sub-gas chamber 20f and fluidly connects the first sub-gas chamber 20f to the second sub-gas chamber 20g. And the valve 55a disconnects the second gas chamber 22 fluidly from the first sub-gas chamber 20f and fluidly shuts off the first sub-gas chamber 20f from the second sub-gas chamber 20g. 2 open state. The valve 55a is configured to be switchable between a first open state and a second open state. At least one of the fixed contact 25 and the first end 31 is disposed in the arc-extinguishing gas flow path formed when the valve 55a is in the first open state. The valve 55a is configured to switch from the closed state to the first open state before the movable contact 30 separates from the fixed contact 25. The valve 55a is configured to switch from the first open state to the second open state after the movable contact 30 separates from the fixed contact 25.

  In the gas circuit breaker 1e of the present embodiment, the arc-extinguishing gas having a high pressure is prevented from continuing to flow from the second gas chamber 22 to the second sub-gas chamber 20g after the arc 60 is extinguished. You. According to the gas circuit breaker 1e of the present embodiment, the time required for returning the arc-extinguishing gas from the first gas chamber 20 to the second gas chamber 22 using the pump 63 can be reduced. The time between the end of the first shut-off operation and the start of the second shut-off operation following the first shut-off operation of the gas circuit breaker 1e can be reduced.

  The first to sixth embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. As long as there is no contradiction, at least two of the first to sixth embodiments disclosed this time may be combined. For example, in the second to fourth embodiments, the first tubular member 12 may be provided as in the fifth embodiment. In Embodiment 1, Embodiment 3 and Embodiment 4, as in Embodiment 6, the valve 55a, the first tubular member 12, and the second tubular member 12e may be used. In the fifth embodiment, the valve 55a and the second cylindrical member 12e may be used as in the sixth embodiment. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1, 1a, 1b, 1c, 1d, 1e Gas circuit breaker, 3 first bushing, 4 second bushing, 5 first conductor, 6 second conductor, 7 first conductive member, 8 second conductive member, 9, 9d Gas tank, 10 first outer wall, 11, 11d second outer wall, 12 first cylindrical member, 12e second cylindrical member, 13, 13d first partition plate, 14 first terminal plate, 15, 15d first insulation Spacer, 16, 16d Second partition plate, 17 Second terminal plate, 18, 18d Second insulating spacer, 19 First through hole, 19f Third through hole, 20, 23, 24 First gas chamber, 20f First Sub gas chamber, 20 g second sub gas chamber, 22 second gas chamber, 25 stationary contact, 26, 26 c nozzle, 27, 27 c base, 28, 28 c projection, 30, 30 c movable contact, 31, 31 c 1 end, 3 p opening, 32, 32c second end, 33 conductive rod member, 34 conductive sliding member, 36, 36c second through hole, 37 first guide member, 38 first inner peripheral part, 38c third inner peripheral part , 39, 39c second inner peripheral portion, 40 spring, 50 first movable member, 51 second movable member, 53 drive portion, 55, 55a valve, 56 inside, 57, 58 sealing member, 60 arc, 63 pump, 64 first piping, 65 second piping, 70 limiting member, 71 first plate, 72 second plate, 75 second guide member, 76 stopper.

Claims (13)

Fixed contacts,
A movable contact having a first end on the fixed contact side;
A gas blowing unit for blowing an arc-extinguishing gas to at least one of the fixed contact and the first end,
The gas blowing unit may be configured to perform the at least one of the fixed contact and the first end from before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. is configured to continue spraying the extinguishing gas to One,
The gas blowing section includes a first gas chamber in which the arc-extinguishing gas having a first pressure is filled, and a first gas chamber in which the arc-extinguishing gas having a second pressure higher than the first pressure is filled. A second gas chamber and a valve, wherein the first gas chamber includes a first sub-gas chamber and a second sub-gas chamber, and wherein the first sub-gas chamber includes the second gas chamber and the second gas chamber. Between the two sub-gas chambers,
A closed state in which the valve fluidly shuts off the second gas chamber from the first sub-gas chamber; and a valve in which the valve fluidly connects the second gas chamber to the first sub-gas chamber. It is configured to be switchable between the open state to communicate,
The open state is such that the valve fluidly communicates the second gas chamber with the first sub-gas chamber and fluidly communicates the first sub-gas chamber with the second sub-gas chamber. 1 open, the valve fluidly connects the second gas chamber to the first sub-gas chamber and fluidly shuts off the first sub-gas chamber from the second sub-gas chamber A second open state, wherein the valve is configured to be switchable between the first open state and the second open state,
The fixed contact and the at least one of the first end are disposed in a flow path of the arc-extinguishing gas formed in the first open state of the valve;
The valve is configured to switch from the closed state to the first open state before the movable contact moves away from the fixed contact,
The gas circuit breaker, wherein the valve is configured to switch from the first open state to the second open state after the movable contact moves away from the fixed contact . Further comprising a guide member for guiding the movable contact,
The gas circuit breaker according to claim 1, wherein the guide member defines at least a part of the flow path . The gas blowing unit includes a partition plate that separates the first gas chamber and the second gas chamber,
The partition plate has a through hole that fluidly connects the first gas chamber and the second gas chamber, and a terminal plate,
The valve closes the through hole in the closed state of the valve, and opens the through hole in the open state of the valve,
The gas circuit breaker according to claim 2 , wherein the movable contact is electrically connected to the terminal plate via the guide member . Fixed contacts,
A movable contact having a first end on the fixed contact side;
A gas blowing unit for blowing an arc-extinguishing gas to at least one of the fixed contact and the first end;
A guide member for guiding the movable contact,
The gas blowing unit may be configured to perform the at least one of the fixed contact and the first end from before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. And is configured to continuously blow the arc-extinguishing gas,
The gas blowing section includes a first gas chamber in which the arc-extinguishing gas having a first pressure is filled, and a first gas chamber in which the arc-extinguishing gas having a second pressure higher than the first pressure is filled. Two gas chambers and a valve,
A closed state in which the valve fluidly shuts off the second gas chamber from the first gas chamber; and a valve in which the valve fluidly connects the second gas chamber to the first gas chamber. It is configured to be switchable between the open state to communicate,
The fixed contact and the at least one of the first end are disposed in a flow path of the arc-extinguishing gas formed in the open state of the valve;
The valve is configured to switch from the closed state to the open state before the movable contact moves away from the fixed contact,
The guide member defines at least a part of the flow path,
The gas blowing unit includes a partition plate that partitions the first gas chamber and the second gas chamber,
The partition plate has a through hole that fluidly connects the first gas chamber and the second gas chamber, and a terminal plate,
The valve closes the through hole in the closed state of the valve, and opens the through hole in the open state of the valve,
A gas circuit breaker, wherein the movable contact is electrically connected to the terminal plate via the guide member . An elastic body that connects the movable contact and the valve;
A limiting member that limits the length of the elastic body to a natural length or less of the elastic body,
The gas circuit breaker according to claim 4 , wherein the elastic body is compressed in the closed state of the valve . Further comprising an elastic body that connects the movable contact and the valve,
In the closed state of the valve, the elastic body is compressed, the gas circuit breaker according to any one of claims 1 to 4. Fixed contacts,
A movable contact having a first end on the fixed contact side;
A gas blowing unit for blowing an arc-extinguishing gas to at least one of the fixed contact and the first end;
With an elastic body,
The gas blowing unit may be configured to perform the at least one of the fixed contact and the first end from before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. And is configured to continuously blow the arc-extinguishing gas,
The gas blowing section includes a first gas chamber in which the arc-extinguishing gas having a first pressure is filled, and a first gas chamber in which the arc-extinguishing gas having a second pressure higher than the first pressure is filled. Two gas chambers and a valve,
A closed state in which the valve fluidly blocks the second gas chamber from the first gas chamber; and a valve in which the valve fluidly connects the second gas chamber to the first gas chamber. It is configured to be switchable between the open state to communicate,
The fixed contact and the at least one of the first end are disposed in a flow path of the arc-extinguishing gas formed in the open state of the valve;
The valve is configured to switch from the closed state to the open state before the movable contact moves away from the fixed contact,
The elastic body connects the movable contact and the valve,
The gas circuit breaker , wherein the elastic body is compressed in the closed state of the valve . The gas circuit breaker according to claim 7 , further comprising a limiting member that limits a length of the elastic body to a natural length or less of the elastic body. The valve has a shape of a cup that opens to the movable contact side,
The elastic body is housed inside the valve,
7. The valve of claim 6, wherein in the closed state of the valve, the interior of the valve is in fluid communication with the second gas chamber and is fluidly isolated from the first gas chamber. 8. The gas circuit breaker according to 7 . A drive unit;
A movable member driven by the driving unit,
The valve is attached to the movable member,
The gas circuit breaker according to any one of claims 5 to 9 , wherein the movable contact is connected to the movable member via the elastic body . Fixed contacts,
A movable contact having a first end on the fixed contact side;
A gas blowing unit for blowing an arc-extinguishing gas to at least one of the fixed contact and the first end,
The gas blowing unit may be configured to perform the at least one of the fixed contact and the first end from before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. And is configured to continuously blow the arc-extinguishing gas,
The gas blowing section includes a first gas chamber in which the arc-extinguishing gas having a first pressure is filled, and a first gas chamber in which the arc-extinguishing gas having a second pressure higher than the first pressure is filled. Two gas chambers and a valve,
A closed state in which the valve fluidly blocks the second gas chamber from the first gas chamber; and a valve in which the valve fluidly connects the second gas chamber to the first gas chamber. It is configured to be switchable between the open state to communicate,
The fixed contact and the at least one of the first end are disposed in a flow path of the arc-extinguishing gas formed in the open state of the valve;
The valve is configured to switch from the closed state to the open state before the movable contact moves away from the fixed contact,
The movable contact includes a conductive rod member,
In the closed state of the valve, the fixed contact is in contact with a side surface of the conductive rod member away from the first end . Fixed contacts,
A movable contact having a first end on the fixed contact side;
A gas blowing unit for blowing an arc-extinguishing gas to at least one of the fixed contact and the first end;
A guide member for guiding the movable contact,
The gas blowing unit may be configured to perform the at least one of the fixed contact and the first end from before the movable contact separates from the fixed contact until after the movable contact separates from the fixed contact. And is configured to continuously blow the arc-extinguishing gas,
The gas blowing section includes a first gas chamber in which the arc-extinguishing gas having a first pressure is filled, and a first gas chamber in which the arc-extinguishing gas having a second pressure higher than the first pressure is filled. Two gas chambers and a valve,
A closed state in which the valve fluidly blocks the second gas chamber from the first gas chamber; and a valve in which the valve fluidly connects the second gas chamber to the first gas chamber. It is configured to be switchable between the open state to communicate,
The fixed contact and the at least one of the first end are disposed in a flow path of the arc-extinguishing gas formed in the open state of the valve;
The valve is configured to switch from the closed state to the open state before the movable contact moves away from the fixed contact,
The guide member defines at least a part of the flow path,
The movable contact includes a conductive sliding member that slides on the guide member, and a conductive rod member attached to the conductive sliding member,
In the closed state of the valve, the fixed contact is in contact with a side surface of the conductive rod member away from the first end,
The conductive sliding member includes a first inner peripheral portion of the guide member adjacent to the first end side of the conductive sliding member and a second inner peripheral portion of the guide member adjacent to the valve side of the conductive sliding member. A gas circuit breaker configured to fluidly communicate with an inner peripheral portion . A drive unit;
A movable member driven by the driving unit,
The valve and the movable contact is attached to the movable member, the gas breaker according to claim 11 or claim 12.

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