JPH0126137B2 - - Google Patents
Info
- Publication number
- JPH0126137B2 JPH0126137B2 JP55147170A JP14717080A JPH0126137B2 JP H0126137 B2 JPH0126137 B2 JP H0126137B2 JP 55147170 A JP55147170 A JP 55147170A JP 14717080 A JP14717080 A JP 14717080A JP H0126137 B2 JPH0126137 B2 JP H0126137B2
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- movable contact
- suction chamber
- check valve
- fixed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000012530 fluid Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
Landscapes
- Circuit Breakers (AREA)
Description
【発明の詳細な説明】
この発明は、可動接触子の開離により発生する
アークを、パツフア手段による消弧性圧力流体の
吹出しと、負圧吸引手段によるアークの吸出しと
により消弧するようにした電力開閉装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention is designed to extinguish an arc generated by the opening of a movable contact by blowing out arc-extinguishing pressure fluid by a puffer means and sucking out the arc by a negative pressure suction means. The present invention relates to electric power switchgear.
しや断器など、負圧吸引手段を付加したこの種
のパツフア形の開閉装置は、先行技術として第１
図に縦断面図に示すものがある。図は開路状態を
示し、１は固定部（図示していない）に固定され
た端子板、２はこの端子板に後端で固着された筒
状体で、内部に蓄圧室３を形成している。４はこ
の筒状体の前端部にはめ込み固着された絶縁ノズ
ルで、内径部４ａの外端側はらつぱ状に広がつた
開口部４ｂが形成されている。５は筒状体２内で
端子板１に固着された固定接触子、６は他方の端
子板（図示は略す）側に電気接触され、図示して
ない駆動機構により矢印Ａ方向に投入移動され、
矢印Ｂ方向に開離移動される可動接触子で、投入
移動されると、絶縁ノズル４の内径部４ａを通り
固定接触子５に差込まれ、第３図に示すように投
入状態になる。７は絶縁材からなり、筒状体２の
外円周に固着された負圧シリンダ、８は可動接触
子６に固着され負圧シリンダ７内をしゆう動する
吸引ピストン、９は負圧シリンダ７と吸引ピスト
ン８及び筒状体２の前端部とで形成された負圧吸
引室である。 This type of puffer-type switchgear equipped with a negative pressure suction means, such as a shield disconnector, is the first known prior art.
Some of the figures are shown in longitudinal cross-section. The figure shows an open circuit state, where 1 is a terminal plate fixed to a fixed part (not shown), 2 is a cylindrical body fixed to this terminal plate at the rear end, and a pressure accumulation chamber 3 is formed inside. There is. Reference numeral 4 designates an insulating nozzle that is fitted and fixed to the front end of this cylindrical body, and an opening 4b that widens out in the shape of a flap is formed at the outer end of the inner diameter portion 4a. A fixed contact 5 is fixed to the terminal plate 1 within the cylindrical body 2, and a fixed contact 6 is brought into electrical contact with the other terminal plate (not shown), and is moved in the direction of arrow A by a drive mechanism (not shown). ,
It is a movable contact that is moved apart and opened in the direction of arrow B, and when it is moved in, it passes through the inner diameter part 4a of the insulating nozzle 4 and is inserted into the fixed contact 5, and becomes in the closed state as shown in FIG. 7 is a negative pressure cylinder made of an insulating material and fixed to the outer circumference of the cylindrical body 2; 8 is a suction piston fixed to the movable contact 6 and moves within the negative pressure cylinder 7; 9 is a negative pressure cylinder 7, the suction piston 8, and the front end of the cylindrical body 2.
上記のように構成された開閉装置は、消弧性流
体、例えばSF6ガス、空気、絶縁油などが封入さ
れた密封容器（図示してない）内に収められてい
る。 The switchgear configured as described above is housed in a sealed container (not shown) filled with an arc-extinguishing fluid such as SF 6 gas, air, insulating oil, etc.
上記開閉装置において、第３図の投入状態のと
き、しや断信号が与えられると、駆動機構により
可動接触子６が急速開離移動される。すると、可
動接触子６が固定接触子５から開離しアークが発
生する。このアーク熱により、蓄圧室３内の消弧
性流体は高圧に昇圧される。一方、可動接触子６
によりピストン８も後退移動し、吸引室９の容積
が増大して負圧を生じる。可動接触子６が絶縁ノ
ズル４の開口部４ｂから遠ざかると、蓄圧室３の
高圧流体が噴出し、引伸ばされているアークに吹
付けて冷却する。同時にこのアークの混合ガスは
吸引室９の増大する負圧に吸引され、吸出されて
消弧され第１図に示す開路状態になる。 In the opening/closing device described above, in the closed state shown in FIG. 3, when a shrinkage signal is applied, the movable contact 6 is rapidly opened and moved by the drive mechanism. Then, the movable contact 6 separates from the fixed contact 5 and an arc is generated. This arc heat increases the pressure of the arc-extinguishing fluid in the pressure storage chamber 3 to a high pressure. On the other hand, the movable contact 6
As a result, the piston 8 also moves backward, increasing the volume of the suction chamber 9 and creating negative pressure. When the movable contactor 6 moves away from the opening 4b of the insulating nozzle 4, the high-pressure fluid in the pressure accumulator 3 is ejected and sprayed onto the elongated arc to cool it. At the same time, the mixed gas of this arc is attracted by the increasing negative pressure in the suction chamber 9, and is extinguished by being sucked out, resulting in the open circuit state shown in FIG.
上記開閉装置の可動接触子６の投入動作のとき
は、第２図に示すように、ピストン８のシリンダ
７内への前進により、吸引室９内の消弧性流体を
圧縮し加圧する。このため、大きな駆動抵抗が作
用する。この可動接触子６の投入前進位置と吸引
室の圧力との関係を、第４図に曲線図で示す。可
動接触子６の先端位置のA1は第１図の開路状態
を、A2は第２図の投入途中を、A3は第４図の投
入状態を示す。 When the movable contactor 6 of the opening/closing device is turned on, the piston 8 moves forward into the cylinder 7, compressing and pressurizing the arc-extinguishing fluid in the suction chamber 9, as shown in FIG. Therefore, a large driving resistance acts. The relationship between the closing forward position of the movable contactor 6 and the pressure in the suction chamber is shown in a curve diagram in FIG. A 1 at the tip of the movable contact 6 indicates the open state in FIG. 1, A 2 indicates the closing state in FIG. 2, and A 3 indicates the closing state in FIG. 4.
このように、上記先行技術の開閉装置では、投
入時に可動接触子６の運動によりピストン８もシ
リンダ７内を前進し、吸引室９内の消弧性流体を
圧縮し圧力が増大する。この抵抗力のため可動接
触子６の駆動機構は大きな操作力のものが必要で
あつた。また、大電流しや断の場合、発生するア
ークは非常に熱容量が大きく、この高温ガスが吸
引室９内に流入して昇圧し、一時的に負圧発生を
上回り、しや断性能が低下するおそれがあつた。 In this manner, in the above prior art opening/closing device, the piston 8 also moves forward within the cylinder 7 due to the movement of the movable contactor 6 at the time of closing, compressing the arc-extinguishing fluid within the suction chamber 9 and increasing the pressure. Because of this resistance, the drive mechanism for the movable contactor 6 required a large operating force. In addition, in the case of large current shearing, the generated arc has a very large heat capacity, and this high-temperature gas flows into the suction chamber 9 and increases the pressure, temporarily exceeding the negative pressure generation and reducing the shearing performance. There was a risk that it would happen.
この発明は、負圧吸引室を形成している囲い部
材に逆止弁を設け、常時は閉じており、吸引ピス
トンの前進などで負圧吸引室の圧力が外部より高
くなると開いて外方に放圧するようにし、可動接
触子の駆動機構は操作力が低減でき、大電流しや
断においても性能よく消弧される電力開閉装置を
提供することを目的としている。 In this invention, a check valve is provided in the enclosure member forming the negative pressure suction chamber, and the check valve is normally closed and opens when the pressure in the negative pressure suction chamber becomes higher than the outside due to the movement of the suction piston, etc. It is an object of the present invention to provide a power switchgear in which the pressure is released, the operating force of the movable contact drive mechanism can be reduced, and the arc can be extinguished with good performance even when a large current is interrupted.
第５図はこの発明の一実施例による電力開閉装
置の縦断面図であり、１〜７，９，４ａ，４ｂは
上記先行技術による装置と同一のものである。１
１は可動接触子６に固着された吸引ピストンで、
逆止弁１２が設けられている。この逆止弁１２は
次のように構成されている。１１ａ及び１１ｂは
ピストン１１にあけられた弁支持穴及び放出穴、
１３はこの弁支持穴に可動に支持された弁体で、
ばね部材１４により常時は弁体１３を閉じ、放出
穴１１ｂをふさいでいる。１５は弁体１３の先端
に固着され、ばね部材１４を受ける受け板であ
る。負圧シリンダ７、吸引ピストン１１及び筒状
体２の前端部により、負圧吸引室９を形成する囲
い部材をなしている。 FIG. 5 is a longitudinal sectional view of a power switchgear according to an embodiment of the present invention, in which numerals 1 to 7, 9, 4a, and 4b are the same as the apparatus according to the prior art described above. 1
1 is a suction piston fixed to a movable contactor 6;
A check valve 12 is provided. This check valve 12 is constructed as follows. 11a and 11b are valve support holes and discharge holes drilled in the piston 11;
13 is a valve body movably supported in this valve support hole;
The spring member 14 normally closes the valve body 13 and blocks the discharge hole 11b. A receiving plate 15 is fixed to the tip of the valve body 13 and receives the spring member 14. The negative pressure cylinder 7, the suction piston 11, and the front end of the cylindrical body 2 form an enclosing member that forms the negative pressure suction chamber 9.
上記一実施例の装置において、開路状態の可動
接触子６が投入動作をすると、ピストン１１も前
進し吸引室９内の消弧性流体を圧縮するが、逆止
弁１２が開かれ放圧される。このため、可動接触
子６の駆動機構は大きな操作力のものでなくてよ
い。また、投入状態から可動接触子６が開離動作
をすると、ピストン１１も後退し、逆止弁１２は
閉じていて吸引室９内には大きな負圧を生じる。
大電流のしや断の場合、大きな熱容量のアークに
よる高温ガスが吸引室９内に流入し圧力が高まる
と、逆止弁１２が開き放出して降圧し、続行する
ピストン１１の後退運動により負圧を回復し、性
能よく消弧する。 In the device of the above embodiment, when the movable contact 6 in the open state performs the closing operation, the piston 11 also moves forward and compresses the arc-extinguishing fluid in the suction chamber 9, but the check valve 12 is opened and the pressure is released. Ru. Therefore, the drive mechanism for the movable contactor 6 does not need to require a large operating force. Further, when the movable contactor 6 performs an opening/separating operation from the closed state, the piston 11 also retreats, the check valve 12 is closed, and a large negative pressure is generated in the suction chamber 9.
In the case of a large current interruption, high-temperature gas due to an arc with a large heat capacity flows into the suction chamber 9 and the pressure increases.The check valve 12 opens and releases the gas, causing the pressure to drop, and the continued backward movement of the piston 11 causes a negative Restores pressure and extinguishes arc with good performance.
第６図はこの発明の他の実施例による開閉装置
の縦断面図で、投入状態を示す。可動接触子１６
は先端側に軸穴１６ａが設けられ、側穴１６ｂが
あけられている。１７は固定部（図示していな
い）に固定された他方の端子板で、接触片１８に
より可動接触子１６に電気接触している。１９は
一端で端子板１７に固着された負圧シリンダで、
吸引ピストン８及び端子板１７とにより囲い部材
をなし、内部に負圧吸引室２０を形成している。
２１は端子板１７に設けられた逆止弁で、次のよ
うに構成されている。１７ａ及び１７ｂは端子板
１７にあけられた弁支持穴及び放出穴、２２はこ
の弁支持穴に可動に支持された弁体で、ばね部材
２３により常時は弁体２２を閉じ、放出穴１６ｂ
をふさいでいる。２４は弁体２２の先端に固着さ
れ、ばね部材２３を受ける受け板である。 FIG. 6 is a longitudinal sectional view of a switchgear according to another embodiment of the present invention, showing the closed state. Movable contact 16
A shaft hole 16a is provided on the tip side, and a side hole 16b is bored. The other terminal plate 17 is fixed to a fixed part (not shown) and is in electrical contact with the movable contact 16 through a contact piece 18 . 19 is a negative pressure cylinder fixed to the terminal plate 17 at one end;
The suction piston 8 and the terminal plate 17 form an enclosing member, and a negative pressure suction chamber 20 is formed inside.
21 is a check valve provided on the terminal plate 17, and is configured as follows. 17a and 17b are valve support holes and discharge holes drilled in the terminal plate 17; 22 is a valve body movably supported in the valve support hole; the valve body 22 is normally closed by a spring member 23;
is blocking the A receiving plate 24 is fixed to the tip of the valve body 22 and receives the spring member 23.
上記他の実施例の開閉装置では、開路状態から
可動接触子１６が投入動作をすると、ピストン８
も前進し吸引室２０内の消弧性流体を圧縮する
が、逆止弁２１が開かれ放圧される。このため、
可動接触子１６の駆動操作力は先行技術のものよ
り小さくてよい。また投入状態から可動接触子１
６が開離動作をすると、ピストン８も後退し、逆
止弁２１は閉じていて吸引室２０内に大きな負圧
を生じる。大電流のしや断の場合、大きな熱容量
のアークによる高温ガスが軸穴１６ａと側穴１６
ｂを通り吸引室２０内に流入し圧力が高まつて
も、逆止弁２１が開き放出して降圧され、ピスト
ン８の後退運動により負圧が回復され消弧に至
る。 In the switchgear of the other embodiment described above, when the movable contact 16 performs the closing operation from the open state, the piston 8
The arc-extinguishing fluid in the suction chamber 20 is also moved forward, but the check valve 21 is opened and the pressure is released. For this reason,
The actuating force of the movable contact 16 may be smaller than that of the prior art. Also, from the closed state, movable contact 1
When the piston 6 performs the opening/separating operation, the piston 8 also moves back, and the check valve 21 closes, creating a large negative pressure in the suction chamber 20. In the case of a large current break, high-temperature gas due to an arc with a large heat capacity is transferred to the shaft hole 16a and the side hole 16.
Even if the pressure increases as it flows into the suction chamber 20 through b, the check valve 21 opens and releases the pressure, which lowers the pressure.The backward movement of the piston 8 restores the negative pressure and extinguishes the arc.
なお、この発明による電力開閉装置は、しや断
器に限らず、開閉器、接触器、断路器及びノーヒ
ユーズブレーカなどにも適用できるものである。 Note that the power switchgear according to the present invention is applicable not only to circuit breakers but also to switches, contactors, disconnectors, no-fuse breakers, and the like.
以上のように、この発明によれば、負圧吸引室
を形成している囲い部材に逆止弁を設け、常時は
閉じており、吸引室内の圧力が外部より高くなる
と開いて放圧するようにしているので、可動接触
子の駆動機構の操作力が低減でき、また、大電流
しや断においても性能よく消弧することができ
る。 As described above, according to the present invention, a check valve is provided in the enclosure member forming the negative pressure suction chamber, and the check valve is normally closed and opens when the pressure inside the suction chamber becomes higher than the outside pressure, thereby releasing the pressure. Therefore, the operating force of the drive mechanism of the movable contact can be reduced, and arc extinguishing can be performed with good performance even in the event of a large current breakage.
第１図は先行技術による電力開閉装置の開路状
態の縦断面図、第２図及び第３図は第１図の装置
の投入途中状態の縦断面図及び投入状態の縦断面
図、第４図は第１図ないし第３図の装置の投入動
作のときの可動接触子の位置と負圧吸引室の圧力
との関係を示す曲線図、第５図はこの発明の一実
施例による電力開閉装置の投入状態の縦断面図、
第６図はこの発明の他の実施例による電力開閉装
置の投入状態の縦断面図である。
２……筒状体、３……蓄圧室、４……絶縁ノズ
ル、５……固定接触子、６……可動接触子、７…
…負圧シリンダ、８……吸引ピストン、９……負
圧吸引室、１１……吸引ピストン、１２……逆止
弁、１６……可動接触子、１７……端子板、１９
……負圧シリンダ、２０……負圧吸引室、２１…
…逆止弁。なお、図中同一符号は同一又は相当部
分を示す。
FIG. 1 is a longitudinal sectional view of the power switchgear according to the prior art in an open state, FIGS. 2 and 3 are longitudinal sectional views of the device in FIG. is a curve diagram showing the relationship between the position of the movable contact and the pressure in the negative pressure suction chamber during the closing operation of the device shown in FIGS. 1 to 3, and FIG. 5 is a power switchgear according to an embodiment of the present invention. A vertical cross-sectional view of the loaded state,
FIG. 6 is a longitudinal sectional view of a power switchgear in a closed state according to another embodiment of the present invention. 2... Cylindrical body, 3... Pressure accumulation chamber, 4... Insulating nozzle, 5... Fixed contact, 6... Movable contact, 7...
... Negative pressure cylinder, 8 ... Suction piston, 9 ... Negative pressure suction chamber, 11 ... Suction piston, 12 ... Check valve, 16 ... Movable contact, 17 ... Terminal plate, 19
...Negative pressure cylinder, 20...Negative pressure suction chamber, 21...
…non-return valve. Note that the same reference numerals in the figures indicate the same or equivalent parts.
Claims (1)
着され、内部に消弧性流体の蓄圧室を形成した筒
状体、この筒状体内に配設された固定接触子、投
入状態では上記絶縁ノズルを貫通し上記固定接触
子に接触する可動接触子、上記筒状体の前方に配
設された負圧シリンダ、上記可動接触子に固着さ
れ上記負圧シリンダ内をしゆう動する吸引ピスト
ン、上記負圧シリンダ内に形成され、上記吸引ピ
ストンの移動で負圧を生じ、可動接触子の開離に
より発生したアークの混合ガスを吸引し消弧させ
る負圧吸引室、及びこの負圧吸引室を形成する囲
い部材に設けられ、吸引室の内圧が外部圧より高
くなると開く逆止弁を備えたことを特徴とする電
力開閉装置。 ２ 囲い部材の一部の一方の端板をなす吸引ピス
トンに逆止弁を設けたことを特徴とする特許請求
の範囲第１項記載の電力開閉装置。 ３ 囲い部材の一部の他方の端板をなす他方の端
子板に逆止弁を設けたことを特徴とする特許請求
の範囲第１項記載の電力開閉装置。[Scope of Claims] 1. A cylindrical body attached to a stationary side and having an insulating nozzle fixed to its front end and forming an arc-extinguishing fluid pressure accumulation chamber inside, a fixed contact disposed inside this cylindrical body, In the closed state, a movable contact passes through the insulating nozzle and contacts the fixed contact, a negative pressure cylinder is disposed in front of the cylindrical body, and the movable contact is fixed to the movable contact and moves inside the negative pressure cylinder. a moving suction piston, a negative pressure suction chamber formed in the negative pressure cylinder, which generates negative pressure by the movement of the suction piston, and which sucks and extinguishes the mixed gas of the arc generated by the opening of the movable contact; A power switching device characterized by comprising a check valve that is provided in an enclosure member that forms the negative pressure suction chamber and opens when the internal pressure of the suction chamber becomes higher than the external pressure. 2. The power switching device according to claim 1, wherein a check valve is provided on a suction piston forming one end plate of a part of the enclosing member. 3. The power switching device according to claim 1, characterized in that a check valve is provided on the other terminal plate forming the other end plate of a part of the enclosing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14717080A JPS5769634A (en) | 1980-10-20 | 1980-10-20 | Power switching unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14717080A JPS5769634A (en) | 1980-10-20 | 1980-10-20 | Power switching unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5769634A JPS5769634A (en) | 1982-04-28 |
| JPH0126137B2 true JPH0126137B2 (en) | 1989-05-22 |
Family
ID=15424160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14717080A Granted JPS5769634A (en) | 1980-10-20 | 1980-10-20 | Power switching unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5769634A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5045651A (en) * | 1989-02-08 | 1991-09-03 | Hitachi, Ltd. | Switch |
| JPH03116638U (en) * | 1990-03-14 | 1991-12-03 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4729345U (en) * | 1971-04-26 | 1972-12-04 | ||
| JPS5572740U (en) * | 1978-11-14 | 1980-05-19 | ||
| JPS6336589Y2 (en) * | 1979-01-11 | 1988-09-28 |
-
1980
- 1980-10-20 JP JP14717080A patent/JPS5769634A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5769634A (en) | 1982-04-28 |
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