JP2011018498A

JP2011018498A - Vacuum valve

Info

Publication number: JP2011018498A
Application number: JP2009161388A
Authority: JP
Inventors: Tomokazu Yoshida; 友和吉田; Mitsuru Tsukima; 満月間; Junichi Abe; 淳一安部; Tadahiro Yoshida; 忠広吉田
Original assignee: Mitsubishi Electric Corp
Current assignee: Mitsubishi Electric Corp
Priority date: 2009-07-08
Filing date: 2009-07-08
Publication date: 2011-01-27
Anticipated expiration: 2029-07-08
Also published as: JP5281975B2

Abstract

【課題】アークの局所的な停留の防止と、接点の十分な冷却と、各電極ロッドの接点接離時における耐衝撃性の向上とを図り、小型化と高電圧化と遮断・定格電流の大容量化とを実現する真空バルブを得ることである。
【解決手段】一端に接点が接合された固定と可動の各電極ロッドが、管状の電極とこの電極の外周側に設けられた管状の補強材とで形成され、各電極の接点側端部の管壁に、電極の軸方向に対して傾斜した複数のスリットによる電極コイル部が形成されたものである。
【選択図】図１[PROBLEMS] To prevent local arching of arcs, to sufficiently cool contacts, and to improve impact resistance at the time of contact / separation of each electrode rod. It is to obtain a vacuum valve that realizes a large capacity.
Each fixed and movable electrode rod having a contact bonded at one end is formed of a tubular electrode and a tubular reinforcing material provided on the outer peripheral side of the electrode, and the contact side end portion of each electrode is formed. An electrode coil portion is formed on the tube wall by a plurality of slits inclined with respect to the axial direction of the electrode.
[Selection] Figure 1

Description

本発明は、電気回路を開閉する真空遮断器の開閉接点を内蔵した真空バルブに関するものであり、特に、冷却性に優れ、大容量化が可能な電極構造を有する真空バルブに関するものである。 The present invention relates to a vacuum valve having a built-in switching contact of a vacuum circuit breaker that opens and closes an electric circuit, and particularly relates to a vacuum valve having an electrode structure that is excellent in cooling performance and capable of increasing capacity.

従来の真空バルブは、絶縁円筒の真空容器からなり、その内側に筒状のアークシールドが配置されている。アークシールドの内部には、固定接点と可動接点とが接離可能に配置されている。また、固定接点は固定ロッドに接続され、可動接点は可動ロッドに接続されている。固定ロッドにおける固定接点接合部の反対側は、真空容器の一方の蓋部から引き出され、可動ロッドにおける可動接点接合部の反対側は、真空容器の他方の蓋部からベローズを介して引き出されている。
真空バルブは、その固定ロッドと可動ロッドとが主回路に接続されており、可動ロッドを上下に駆動することにより、固定接点と可動接点とを接離させ、主回路電流の遮断または通電を行う。 A conventional vacuum valve is composed of an insulating cylindrical vacuum vessel, and a cylindrical arc shield is disposed inside thereof. Inside the arc shield, a fixed contact and a movable contact are disposed so as to be able to contact and separate. The fixed contact is connected to the fixed rod, and the movable contact is connected to the movable rod. The opposite side of the fixed contact junction in the fixed rod is drawn out from one lid of the vacuum vessel, and the opposite side of the movable contact junction in the movable rod is drawn out from the other lid of the vacuum vessel via the bellows. Yes.
The vacuum valve has a fixed rod and a movable rod connected to the main circuit. By driving the movable rod up and down, the fixed contact and the movable contact are brought into and out of contact with each other, and the main circuit current is cut off or energized. .

従来の真空バルブでは、通電中に固定接点と可動接点とを開離させると、開離間隙にアークが発生する。固定接点または可動接点におけるアークが発生する場所（アークスポットと記す）が局所的であると、固定接点または可動接点が局所的に溶融してしまうとの問題があった。
この問題を解決した真空バルブとして、固定接点と固定ロッドとの間および可動接点と可動ロッドとの間にコイル部を設け、このコイル部により、固定接点と可動接点との開離間隔に縦磁界を発生させ、アークスポットの局所的な停留を防止し、発生アークを拡散させるものがある。 In the conventional vacuum valve, when the fixed contact and the movable contact are separated during energization, an arc is generated in the separation gap. If the place where the arc occurs in the fixed contact or the movable contact (referred to as an arc spot) is local, the fixed contact or the movable contact is locally melted.
As a vacuum valve that solves this problem, a coil portion is provided between the fixed contact and the fixed rod and between the movable contact and the movable rod, and this coil portion allows a vertical magnetic field to be separated between the fixed contact and the movable contact. Is generated, the local stop of the arc spot is prevented, and the generated arc is diffused.

この真空バルブの、コイル部は、固定ロッドまたは可動ロッドを接合する接合孔が設けられたリング部と、リング部から外径側に伸びる４本の腕部と、この腕部の先端から円周方向に伸びる円弧部と、この円弧部から突出した凸部とからなっているものである。
また、別のコイル部は、固定ロッドの固定接点と接合される端部と可動ロッドの可動接点と接合される端部とに設けられた鍋底形の凹み部を、クランク形状に加工したものである（例えば、特許文献１参照）。 The coil part of this vacuum valve has a ring part provided with a joining hole for joining a fixed rod or a movable rod, four arm parts extending from the ring part to the outer diameter side, and a circumference from the tip of the arm part. It consists of a circular arc part extending in the direction and a convex part protruding from the circular arc part.
In addition, another coil part is obtained by processing a pot-bottom dent provided at the end joined to the fixed contact of the fixed rod and the end joined to the movable contact of the movable rod into a crank shape. Yes (for example, see Patent Document 1).

また、従来の真空バルブは、固定接点と可動接点とが真空容器中にあり、熱放散性が極めて悪く、大電流を通電すると温度上昇が非常に大きいとの問題があった。
この問題を解決した、固定接点と可動接点との熱放散性を向上させ、温度が非常に高くなるのを防止した真空バルブとして、固定ロッドと可動ロッドとを中空管として、中空の固定ロッドの一端側の開口部に固定接点を設け、中空の可動ロッドの一端側の開口部に可動接点を設け、固定接点の裏面および可動接点の裏面が、冷却媒体に接する構造としたものがある（例えば、特許文献２参照）。 Further, the conventional vacuum valve has a problem that the fixed contact and the movable contact are in the vacuum vessel, the heat dissipation is extremely poor, and the temperature rise is very large when a large current is applied.
As a vacuum valve that solves this problem and improves heat dissipation between the fixed contact and the movable contact and prevents the temperature from becoming very high, the fixed rod and the movable rod are used as a hollow tube, and the hollow fixed rod is used. There is a structure in which a fixed contact is provided at the opening on one end of the rod, a movable contact is provided on the opening on one end of the hollow movable rod, and the back surface of the fixed contact and the back surface of the movable contact are in contact with the cooling medium ( For example, see Patent Document 2).

特開２０００−５７９１３号公報（第１頁、第４頁、第１図、第２図第１７図）JP 2000-57913 A (first page, fourth page, FIG. 1, FIG. 2, FIG. 17) 特開昭６０−９１５１７号公報（第２頁、第２図）JP 60-91517 A (2nd page, FIG. 2)

しかし、特許文献１に記載の真空バルブにおいて、特許文献２に記載の真空バルブと同様に、固定ロッドと可動ロッドとを冷却媒体を取り入れることができる中空管としても、固定接点と固定ロッドとの間および可動接点と可動ロッドとの間に、上記構造のコイル部が設けられており、コイル部の構造から、固定接点の裏面および可動接点の裏面が、冷却気体に接することができないので、やはり、固定接点および可動接点が十分に冷却されず、温度上昇が大きくなり真空バルブの大容量化が困難であるとの問題があった。 However, in the vacuum valve described in Patent Document 1, similar to the vacuum valve described in Patent Document 2, the fixed rod and the movable rod can be used as a hollow tube that can incorporate a cooling medium. And between the movable contact and the movable rod, the coil portion of the above structure is provided, and from the structure of the coil portion, the back surface of the fixed contact and the back surface of the movable contact cannot contact the cooling gas. Again, there was a problem that the fixed contact and the movable contact were not sufficiently cooled, and the temperature rise increased, making it difficult to increase the capacity of the vacuum valve.

また、真空バルブは、通常高温炉内で真空ロウ付けされるため、高電気伝導率、脱ガスが少ない等の利点から、固定ロッドと可動ロッドとには無酸素銅を使用される。無酸素銅が用いられた中空の固定ロッドおよび中空の可動ロッドは、十分な機械強度を有しておらず、接点間の接離における耐衝撃性が低いとの問題があった。
また、耐衝撃性を向上させるため、固定ロッドと可動ロッドとの軸方向に垂直な断面の面積を増加させると、真空バルブ自体が大型化したり、絶縁距離の短縮により耐電圧性能が低下する等の問題があった。 In addition, since the vacuum valve is normally brazed in a high temperature furnace, oxygen-free copper is used for the fixed rod and the movable rod because of advantages such as high electrical conductivity and low outgassing. A hollow fixed rod and a hollow movable rod using oxygen-free copper have a problem that they do not have sufficient mechanical strength and have low impact resistance in contact and separation between contacts.
In order to improve impact resistance, increasing the cross-sectional area perpendicular to the axial direction of the fixed rod and movable rod will increase the size of the vacuum valve itself and decrease the withstand voltage performance by shortening the insulation distance. There was a problem.

本発明は、上記のような問題を解決するためになされたものであり、その目的は、アークスポットの局所的な停留の防止と、固定接点および可動接点の十分な冷却と、大型化させずに固定ロッドと可動ロッドとの接点の接離時における耐衝撃性の向上とができ、小型化と高電圧化と遮断・定格電流の大容量化とを実現する真空バルブを提供することである。 The present invention has been made in order to solve the above-described problems, and its purpose is to prevent local stagnation of the arc spot, sufficient cooling of the fixed contact and the movable contact, and no increase in size. In addition, it is possible to improve the impact resistance when the contact between the fixed rod and the movable rod contacts and separates, and to provide a vacuum valve that realizes downsizing, higher voltage, and higher interrupting and rated current capacity. .

本発明に係わる真空バルブは、両端にフランジが接合された絶縁円筒の真空容器と、真空容器の内部に収納された接離可能な固定接点と可動接点と、一端側が固定接点と接合し、且つ他端側が一方のフランジを貫通して延出した固定電極ロッドと、一端側が可動接点と接合し、且つ他端側が他方のフランジに設けられたベローズを介して延出した可動電極ロッドとを備えた真空バルブであって、固定電極ロッドが、管状の固定電極と固定電極の外周側に設けられた管状の補強材とで形成され、可動電極ロッドが、管状の可動電極と可動電極の外周側に設けられた管状の補強材とで形成され、固定電極の固定接点側端部の管壁に、固定電極の軸方向に対して傾斜した複数のスリットによる固定電極コイル部が形成され、可動電極の可動接点側端部の管壁に、可動電極の軸方向に対して傾斜した複数のスリットによる可動電極コイル部が形成されたものである。 A vacuum valve according to the present invention includes an insulating cylindrical vacuum container having flanges joined at both ends, a fixed contact and a movable contact that are housed in the vacuum container, and one end joined to the fixed contact, and A fixed electrode rod having the other end extending through one flange, and a movable electrode rod having one end joined to a movable contact and the other end extending through a bellows provided on the other flange. The fixed electrode rod is formed of a tubular fixed electrode and a tubular reinforcing material provided on the outer peripheral side of the fixed electrode, and the movable electrode rod is formed on the outer peripheral side of the tubular movable electrode and the movable electrode. A fixed electrode coil portion formed by a plurality of slits inclined with respect to the axial direction of the fixed electrode is formed on the tube wall of the fixed contact side end portion of the fixed electrode. End of movable contact To the tube wall, in which the movable electrode coil portion by a plurality of slits inclined relative to the axial direction of the movable electrode is formed.

本発明に係わる真空バルブは、両端にフランジが接合された絶縁円筒の真空容器と、真空容器の内部に収納された接離可能な固定接点と可動接点と、一端側が固定接点と接合し、且つ他端側が一方のフランジを貫通して延出した固定電極ロッドと、一端側が可動接点と接合し、且つ他端側が他方のフランジに設けられたベローズを介して延出した可動電極ロッドとを備えた真空バルブであって、固定電極ロッドが、管状の固定電極と固定電極の外周側に設けられた管状の補強材とで形成され、可動電極ロッドが、管状の可動電極と可動電極の外周側に設けられた管状の補強材とで形成され、固定電極の固定接点側端部の管壁に、固定電極の軸方向に対して傾斜した複数のスリットによる固定電極コイル部が形成され、可動電極の可動接点側端部の管壁に、可動電極の軸方向に対して傾斜した複数のスリットによる可動電極コイル部が形成されたものであり、小型化と高電圧化と遮断・定格電流の大容量化とが実現できる。 A vacuum valve according to the present invention includes an insulating cylindrical vacuum container having flanges joined at both ends, a fixed contact and a movable contact that are housed in the vacuum container, and one end joined to the fixed contact, and A fixed electrode rod having the other end extending through one flange, and a movable electrode rod having one end joined to a movable contact and the other end extending through a bellows provided on the other flange. The fixed electrode rod is formed of a tubular fixed electrode and a tubular reinforcing material provided on the outer peripheral side of the fixed electrode, and the movable electrode rod is formed on the outer peripheral side of the tubular movable electrode and the movable electrode. A fixed electrode coil portion formed by a plurality of slits inclined with respect to the axial direction of the fixed electrode is formed on the tube wall of the fixed contact side end portion of the fixed electrode. End of movable contact The movable electrode coil part is formed on the tube wall by a plurality of slits inclined with respect to the axial direction of the movable electrode, and it is possible to achieve downsizing, higher voltage, and higher interrupting and rated current capacity. .

本発明の実施の形態１に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 1 of this invention. 本発明の実施の形態１に係わる真空バルブにおける、固定電極および可動電極のスリットが設けられた部分の構造を示す斜視模式図である。It is a perspective schematic diagram which shows the structure of the part in which the slit of the fixed electrode and the movable electrode was provided in the vacuum valve concerning Embodiment 1 of this invention. 本発明の実施の形態１に係わる真空バルブにおいて、固定接点と可動接点との開離間隔に縦磁界を形成させる機構を説明する図である。In the vacuum valve concerning Embodiment 1 of this invention, it is a figure explaining the mechanism which forms a longitudinal magnetic field in the separation interval of a fixed contact and a movable contact. 本発明の実施の形態１に係わる真空バルブにおいて、縦置された場合（ａ）および横置された場合（ｂ）の固定接点と可動接点とが冷却される機構を説明する図である。In the vacuum valve concerning Embodiment 1 of this invention, it is a figure explaining the mechanism in which the fixed contact and movable contact of the case (a) vertically arranged and the case (b) horizontally arranged are cooled. 本発明の実施の形態２に係わる真空バルブの固定電極および可動電極のスリットが設けられた部分の構造を示す斜視模式図である。It is a perspective schematic diagram which shows the structure of the part provided with the slit of the fixed electrode and movable electrode of the vacuum valve concerning Embodiment 2 of this invention. 本発明の実施の形態３に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 3 of this invention. 本発明の実施の形態４に係わる真空バルブの、接点と電極ロッドとの接合部の構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the junction part of the contact and electrode rod of the vacuum valve concerning Embodiment 4 of this invention. 本発明の実施の形態５に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 5 of this invention. 本発明の実施の形態６に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 6 of this invention. 発明の実施の形態７に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 7 of invention. 本発明の実施の形態８に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 8 of this invention. 本発明の実施の形態９に係わる真空バルブの構造を示す断面模式図である。It is a cross-sectional schematic diagram which shows the structure of the vacuum valve concerning Embodiment 9 of this invention.

実施の形態１．
図１は、本発明の実施の形態１に係わる真空バルブの構造を示す断面模式図である。
図１に示すように、本実施の形態の真空バルブ１００は、両端に蓋部となるフランジ１ａ，１ｂが接合された絶縁円筒の真空容器１と、真空容器１の内側に配置されたアークシールド２と、アークシールド２の内部に設けられた接離可能な固定接点３ａと可動接点３ｂとを備えている。
固定接点３ａは、固定電極ロッド４ａに、例えば、ロウ付けで接合されており、可動接点３ｂは、可動電極ロッド４ｂに、例えば、ロウ付けで接合されている。
そして、固定電極ロッド４ａは、管状の固定電極５ａと固定電極５ａの外壁を囲んで設けられた管状の補強材（固定側補強材と記す）６ａとで形成され、固定電極５ａと固定側補強材６ａとの端面が、共に固定接点３ａに接合されている。
また、可動電極ロッド４ｂは、管状の可動電極５ｂと可動電極５ｂの外壁とを囲んで設けられた管状の補強材（可動側補強材と記す）６ｂとで形成され、可動電極５ｂと可動側補強材６ｂとの端面が、共に可動接点３ｂに接合されている。 Embodiment 1 FIG.
FIG. 1 is a schematic sectional view showing the structure of a vacuum valve according to Embodiment 1 of the present invention.
As shown in FIG. 1, a vacuum valve 100 according to the present embodiment includes an insulating cylindrical vacuum vessel 1 having flanges 1 a and 1 b serving as lids at both ends, and an arc shield disposed inside the vacuum vessel 1. 2, and a fixed contact 3 a and a movable contact 3 b which are provided inside the arc shield 2 and can be separated from each other.
The fixed contact 3a is joined to the fixed electrode rod 4a, for example, by brazing, and the movable contact 3b is joined to the movable electrode rod 4b, for example, by brazing.
The fixed electrode rod 4a is formed of a tubular fixed electrode 5a and a tubular reinforcing material (referred to as a fixed-side reinforcing material) 6a provided so as to surround the outer wall of the fixed electrode 5a. Both end surfaces of the material 6a are joined to the fixed contact 3a.
The movable electrode rod 4b is formed of a tubular movable electrode 5b and a tubular reinforcing material (referred to as a movable-side reinforcing material) 6b provided so as to surround the outer wall of the movable electrode 5b. Both end surfaces of the reinforcing material 6b are joined to the movable contact 3b.

また、固定電極ロッド４ａにおける固定接点３ａと接合される端面がある部分（固定接点側端部と記す）の反対側の端部は、一方のフランジ１ａを貫通して気密に外部に引き出されている。可動電極ロッド４ｂにおける可動接点３ｂと接合される端面がある部分（可動接点側端部と記す）の反対側の端部は、他方のフランジ１ｂに接合されたベローズ７を介して、気密に外部に引き出されている。
固定電極５ａと可動電極５ｂとは、共に、銅等のような電気伝導度に優れた金属管であり、固定電極５ａにおける固定接点側端部の管壁と、可動電極５ｂにおける可動接点側端部の管壁とには、各々スリット（図示せず）が設けられている。 Further, the end of the fixed electrode rod 4a opposite to the portion with the end face joined to the fixed contact 3a (referred to as the fixed contact side end) passes through one flange 1a and is airtightly drawn to the outside. Yes. The end of the movable electrode rod 4b opposite to the portion with the end face joined to the movable contact 3b (referred to as the movable contact side end) is airtightly sealed via the bellows 7 joined to the other flange 1b. Has been drawn to.
The fixed electrode 5a and the movable electrode 5b are both metal tubes having excellent electrical conductivity, such as copper. The tube wall at the fixed contact side end of the fixed electrode 5a and the movable contact side end of the movable electrode 5b Each tube wall is provided with a slit (not shown).

図２は、本発明の実施の形態１に係わる真空バルブにおける、固定電極および可動電極のスリットが設けられた部分の構造を示す斜視模式図である。
本実施の形態の真空バルブ１００では、図２に示すように、固定電極５ａの固定接点側端部の管壁に形成された複数のスリット８ａと、可動電極５ｂの可動接点側端部の管壁に形成された複数のスリット８ｂとは、共に各接点３ａ，３ｂとの接合部から斜めの方向に形成されている。そして、スリット８ａの傾斜方向とスリット８ｂの傾斜方向とは、固定電極５ａと可動電極５ｂとを貫く軸方向に対して同じである。
すなわち、固定電極５ａの固定接点側端部の管壁には、スリット８ａにより固定電極５ａの軸方向に対して傾斜した歯部９ａが形成され、固定電極コイル部１０ａとなっている。また、可動電極５ｂの可動接点側端部の管壁には、スリット８ｂにより可動電極５ｂの軸方向に対して傾斜した歯部９ｂが形成され、可動電極コイル部１０ｂとなっている。 FIG. 2 is a schematic perspective view showing the structure of a portion where the slits of the fixed electrode and the movable electrode are provided in the vacuum valve according to Embodiment 1 of the present invention.
In the vacuum valve 100 of the present embodiment, as shown in FIG. 2, a plurality of slits 8a formed on the tube wall at the fixed contact side end of the fixed electrode 5a and the tube at the movable contact side end of the movable electrode 5b The plurality of slits 8b formed on the wall are both formed in an oblique direction from the joint portion with each contact 3a, 3b. The inclination direction of the slit 8a and the inclination direction of the slit 8b are the same with respect to the axial direction passing through the fixed electrode 5a and the movable electrode 5b.
That is, a tooth portion 9a inclined with respect to the axial direction of the fixed electrode 5a is formed by the slit 8a on the tube wall at the fixed contact side end portion of the fixed electrode 5a to form the fixed electrode coil portion 10a. Further, a tooth portion 9b inclined with respect to the axial direction of the movable electrode 5b is formed by a slit 8b on the tube wall at the movable contact side end portion of the movable electrode 5b, thereby forming a movable electrode coil portion 10b.

本実施の形態の真空バルブ１００では、固定電極コイル部１０ａと可動電極コイル部１０ｂとで、固定接点３ａと可動接点３ｂとの開離間隔に縦磁界を発生させる。
図３は、本発明の実施の形態１に係わる真空バルブにおいて、固定接点と可動接点との開離間隔に縦磁界を形成させる機構を説明する図である。
図３は、電流Ａが可動電極５ｂから固定電極５ａへ流れる場合を示している。 In the vacuum valve 100 of the present embodiment, a vertical magnetic field is generated at the separation interval between the fixed contact 3a and the movable contact 3b by the fixed electrode coil portion 10a and the movable electrode coil portion 10b.
FIG. 3 is a diagram for explaining a mechanism for forming a longitudinal magnetic field in the separation interval between the fixed contact and the movable contact in the vacuum valve according to the first embodiment of the present invention.
FIG. 3 shows a case where the current A flows from the movable electrode 5b to the fixed electrode 5a.

図３に示すように、電流Ａが、固定電極コイル部１０ａの歯部９ａ、および可動側コイル部１０ｂの歯部９ｂに流れると、各々の歯部９ａ，９ｂに磁場Ｂが発生する。この磁場Ｂにより、固定接点３ａと可動接点３ｂとの開離間隔に縦磁界Ｃを形成する。
この縦磁界Ｃは、遮断時に固定接点３ａと可動接点３ｂとの開離間隔に発生するアークを停留させず、拡散させる（拡散アークＤにする）ので、アークの電流密度を低減させる。それゆえ、アークの維持または遮断後の再点弧の原因となる接点材料からの金属蒸気の発生を抑制し、真空バルブの遮断性能を向上させる。 As shown in FIG. 3, when the current A flows through the tooth portion 9a of the fixed electrode coil portion 10a and the tooth portion 9b of the movable coil portion 10b, a magnetic field B is generated at each tooth portion 9a, 9b. By this magnetic field B, a longitudinal magnetic field C is formed at the separation interval between the fixed contact 3a and the movable contact 3b.
The longitudinal magnetic field C causes the arc generated at the separation interval between the fixed contact 3a and the movable contact 3b at the time of interruption to be diffused without making it stay (diffuse arc D), so that the current density of the arc is reduced. Therefore, generation of metal vapor from the contact material that causes re-ignition after the arc is maintained or interrupted is suppressed, and the interrupting performance of the vacuum valve is improved.

図４は、本発明の実施の形態１に係わる真空バルブにおいて、縦置された場合（ａ）および横置された場合（ｂ）の固定接点と可動接点とが冷却される機構を説明する図である。
図４（ａ）の縦置された真空バルブ１００では、流動状態を矢印で示した冷却媒体Ｅは、中空状の固定電極５ａの内壁に沿って供給され、発熱部Ｆにある固定接点３ａを冷却する。固定接点３ａに接して温められた冷却媒体Ｅは、中空管の固定電極５ａの中心部を通って、固定電極５ａから排出される。また、冷却媒体Ｅは、中空管の可動電極５ｂ内も同様に流れ、発熱部Ｆにある可動接点３ｂを冷却する。 FIG. 4 is a diagram for explaining a mechanism for cooling the fixed contact and the movable contact in the case of being placed vertically (a) and in the case of being placed horizontally (b) in the vacuum valve according to Embodiment 1 of the present invention. It is.
In the vertically placed vacuum valve 100 in FIG. 4A, the cooling medium E whose flow state is indicated by an arrow is supplied along the inner wall of the hollow fixed electrode 5a, and the fixed contact 3a in the heat generating part F is connected to the cooling medium E. Cooling. The cooling medium E warmed in contact with the fixed contact 3a is discharged from the fixed electrode 5a through the center of the fixed electrode 5a of the hollow tube. The cooling medium E also flows in the movable electrode 5b of the hollow tube in the same manner, and cools the movable contact 3b in the heat generating part F.

図４（ｂ）の横置された真空バルブ１００では、流動状態を矢印で示した冷却媒体Ｅは、中空管の固定電極５ａの下側の内壁に沿って供給され、発熱部Ｆにある固定接点３ａを冷却する。固定接点３ａに接して温められた冷却媒体Ｅは、中空管の固定電極５ａの上側の内壁に沿って固定電極５ａから排出される。また、冷却媒体Ｅは、中空管の可動電極５ｂ内も同様に流れ、発熱部Ｆにある可動接点３ｂを冷却する。
本実施の形態では、冷却媒体Ｅには、気体または液体が用いられる。そして、接点部分の冷却は、冷却媒体Ｅの自然対流で行われるが、例えばファンによる強制的な対流で行っても良い。
本実施の形態の真空バルブ１００は、固定電極５ａおよび可動電極５ｂの管内に冷却媒体Ｅを流し、この冷却媒体Ｅを、固定接点３ａの裏面および可動接点３ｂの裏面に、接触できる構造であるので、発熱部Ｆを直接に冷却でき、大型化することなしに、電流容量を大きくできる。 In the horizontally placed vacuum valve 100 in FIG. 4B, the cooling medium E whose flow state is indicated by an arrow is supplied along the inner wall on the lower side of the fixed electrode 5 a of the hollow tube and is in the heat generating portion F. The fixed contact 3a is cooled. The cooling medium E heated in contact with the fixed contact 3a is discharged from the fixed electrode 5a along the inner wall on the upper side of the fixed electrode 5a of the hollow tube. The cooling medium E also flows in the movable electrode 5b of the hollow tube in the same manner, and cools the movable contact 3b in the heat generating part F.
In the present embodiment, gas or liquid is used as the cooling medium E. The contact portion is cooled by natural convection of the cooling medium E, but may be forced convection by a fan, for example.
The vacuum valve 100 of the present embodiment has a structure in which a cooling medium E is allowed to flow through the tubes of the fixed electrode 5a and the movable electrode 5b, and this cooling medium E can be brought into contact with the back surface of the fixed contact 3a and the back surface of the movable contact 3b. Therefore, the heat generating portion F can be directly cooled, and the current capacity can be increased without increasing the size.

本発明の実施の形態１に係わる真空バルブは、固定電極ロッド４ａが固定電極５ａとその外周側に設けられた固定側補強材６ａとで形成され、可動電極ロッド４ｂが可動電極５ｂとその外周側に設けられた可動側補強材６ｂとで形成されている。そして、補強材６ａ，６ｂには、例えばステンレスが用いられる。
そのため、固定接点３ａと可動接点３ｂの接離動作時に、固定電極ロッド４ａと固定接点３ａとの接合部、および固定電極ロッド４ａと真空遮断器の固定側端子部との接合部（図示せず）に加わる衝撃力は、固定側補強材６ａが受け止める。また、固定接点３ａと可動接点３ｂの接離動作時に、可動電極ロッド４ｂと可動接点３ａとの接合部および可動電極ロッド４ｂと真空遮断器の可動側操作機構との接合部（図示せず）に加わる衝撃力は、可動側補強材６ｂが受け止める。 In the vacuum valve according to Embodiment 1 of the present invention, the fixed electrode rod 4a is formed by the fixed electrode 5a and the fixed-side reinforcing material 6a provided on the outer peripheral side thereof, and the movable electrode rod 4b is formed by the movable electrode 5b and the outer periphery thereof. And a movable side reinforcing member 6b provided on the side. For example, stainless steel is used for the reinforcing members 6a and 6b.
Therefore, at the time of contact / separation operation of the fixed contact 3a and the movable contact 3b, the joint between the fixed electrode rod 4a and the fixed contact 3a, and the joint between the fixed electrode rod 4a and the fixed terminal portion of the vacuum circuit breaker (not shown) ) Is applied to the fixed side reinforcing member 6a. Further, during the contact / separation operation of the fixed contact 3a and the movable contact 3b, the joint between the movable electrode rod 4b and the movable contact 3a and the joint between the movable electrode rod 4b and the movable side operation mechanism of the vacuum circuit breaker (not shown). The movable side reinforcing material 6b receives the impact force applied to the.

すなわち、固定接点３ａと可動接点３ｂの接離動作時の衝撃力は、補強材６ａ，６ｂにかかり、固定電極５ａと可動電極５ｂとには加わらないので、固定電極５ａおよび可動電極５ｂは、大きな強度が不要であり、中空管を用いることができる。また、各電極５ａ，５ｂの断面積は電流容量で決まる大きさ以上にする必要がない。また、各電極５ａ，５ｂの歯部の変形も防止できる。
補強材６ａ，６ｂには、耐圧性にすぐれたステンレスを用いることができるので、真空バルブの耐電圧が向上する。 That is, the impact force during the contact / separation operation of the fixed contact 3a and the movable contact 3b is applied to the reinforcing members 6a and 6b and is not applied to the fixed electrode 5a and the movable electrode 5b. A large strength is not required, and a hollow tube can be used. Further, the cross-sectional area of each electrode 5a, 5b need not be larger than the size determined by the current capacity. Further, deformation of the tooth portions of the electrodes 5a and 5b can be prevented.
Since the stainless steel having excellent pressure resistance can be used for the reinforcing members 6a and 6b, the withstand voltage of the vacuum valve is improved.

本実施の形態の真空バルブ１００は、固定電極５ａと可動電極５ｂに金属の中空管が用いられ、それら開口部に接点が接合されているので、冷却媒体で各接点３ａ，３ｂの裏面を直接冷却でき、高温化するのを防止し、定格電流通電性能および遮断性能の向上が図れる。
また、固定電極５ａの固定接点側端部および可動電極５ｂの可動接点側端部がコイル部１０ａ，１０ｂとなっており、接点の開離間隔に発生するアークを拡散アークにできるので、アークの維持または遮断後の再点弧の原因となる接点材料からの金属蒸気の発生を抑制し、遮断性能の向上が図れる。 In the vacuum valve 100 of the present embodiment, a metal hollow tube is used for the fixed electrode 5a and the movable electrode 5b, and the contacts are joined to the openings, so the back surface of each contact 3a, 3b is covered with a cooling medium. It can be cooled directly, preventing high temperature, and improving the rated current conduction performance and interruption performance.
Further, the fixed contact side end of the fixed electrode 5a and the movable contact side end of the movable electrode 5b are coil portions 10a and 10b, and the arc generated at the contact separation interval can be made a diffusion arc. The generation of metal vapor from the contact material, which causes re-ignition after maintenance or interruption, can be suppressed, and the interruption performance can be improved.

また、固定電極ロッド４ａが固定電極５ａとその外周側に設けられた固定側補強材６ａとで形成され、可動電極ロッド４ｂが可動電極５ｂとその外周側に設けられた可動側補強材６ｂとで形成されており、各電極５ａ，５ｂには、接離動作時の衝撃力が加わらないので、電極のサイズが電気性能から決まり、固定電極ロッド４ａおよび可動電極ロッド４ｂが大きくなるのを防止できる。
すなわち、本実施の形態の真空バルブ１００は、小型化できるとともに、高電圧化と遮断・定格電流の大容量化とが実現できる。 The fixed electrode rod 4a is formed of a fixed electrode 5a and a fixed side reinforcing material 6a provided on the outer peripheral side thereof, and the movable electrode rod 4b is provided on the movable electrode 5b and a movable side reinforcing material 6b provided on the outer peripheral side thereof. Since no impact force is applied to each of the electrodes 5a and 5b during contact / separation operation, the size of the electrode is determined by the electrical performance, and the fixed electrode rod 4a and the movable electrode rod 4b are prevented from becoming large. it can.
That is, the vacuum valve 100 of the present embodiment can be miniaturized, and can realize higher voltage and higher interrupting / rated current capacity.

実施の形態２．
図５は、本発明の実施の形態２に係わる真空バルブの固定電極および可動電極のスリットが設けられた部分の構造を示す斜視模式図である。
図５に示すように、本実施の形態の真空バルブは、固定電極２５ａのスリット８ａの傾斜方向と可動電極２５ｂのスリット８ｂの傾斜方向とが、固定電極２５ａと可動電極２５ｂとを貫く軸方向に対して、反対である以外、実施の形態１の真空バルブと同様である。
すなわち、固定電極２５ａの固定接点側端部には、スリット８ａにより固定電極２５ａの軸方向に対して傾斜した歯部９ａが形成され、固定電極コイル部１０ａとなっている。
また、可動電極２５ｂの可動接点側端部には、スリット８ｂにより可動電極２５ｂの軸方向に対して傾斜した歯部９ｂが形成され、可動電極コイル部１０ｂとなっている。そして、歯部９ａの傾斜方向と歯部９ｂの傾斜方向は逆である。 Embodiment 2. FIG.
FIG. 5 is a schematic perspective view showing a structure of a portion provided with slits of the fixed electrode and the movable electrode of the vacuum valve according to the second embodiment of the present invention.
As shown in FIG. 5, the vacuum valve according to the present embodiment has an axial direction in which the inclination direction of the slit 8a of the fixed electrode 25a and the inclination direction of the slit 8b of the movable electrode 25b penetrate the fixed electrode 25a and the movable electrode 25b. On the other hand, it is the same as the vacuum valve of the first embodiment except for the opposite.
That is, at the fixed contact side end of the fixed electrode 25a, a tooth portion 9a inclined with respect to the axial direction of the fixed electrode 25a is formed by the slit 8a to form the fixed electrode coil portion 10a.
Further, a tooth portion 9b inclined with respect to the axial direction of the movable electrode 25b is formed by the slit 8b at the movable contact side end portion of the movable electrode 25b, thereby forming the movable electrode coil portion 10b. And the inclination direction of the tooth part 9a and the inclination direction of the tooth part 9b are reverse.

図５に示すように、電流Ａが、固定電極コイル部１０ａの歯部９ａ、および可動側コイル部１０ｂの歯部９ｂに流れると、各々の歯部９ａ，９ｂに磁場Ｂが発生する。
しかし、歯部９ａの傾斜方向と歯部９ｂの傾斜方向とが逆であるので、磁場Ｂによって形成される磁界Ｈの方向は、接点面と平行な方向となり、磁気駆動力Ｌが発生し、集中アークＭが一定位置に停留することがない。
本実施の形態の真空バルブは、実施の形態１の真空バルブと同様な効果を有するとともに、集中アークを動かすことにより、接点からの金属蒸気の発生を抑制することができ、真空バルブの遮断性能を向上させることができる。 As shown in FIG. 5, when the current A flows through the tooth portion 9a of the fixed electrode coil portion 10a and the tooth portion 9b of the movable coil portion 10b, a magnetic field B is generated at each tooth portion 9a, 9b.
However, since the inclination direction of the tooth portion 9a and the inclination direction of the tooth portion 9b are opposite, the direction of the magnetic field H formed by the magnetic field B is parallel to the contact surface, and a magnetic driving force L is generated. The concentrated arc M does not stop at a fixed position.
The vacuum valve according to the present embodiment has the same effect as the vacuum valve according to the first embodiment, and can suppress the generation of metal vapor from the contact by moving the concentrated arc. Can be improved.

実施の形態３．
図６は、本発明の実施の形態３に係わる真空バルブの構造を示す断面模式図である。
図６は、固定電極ロッドが真空遮断器の固定側端子部に、可動電極ロッドが真空遮断器の可動側操作機構に取り付けられた状態を示している。
図６に示すように、本実施の形態の真空バルブ３００は、一方のフランジ１ａから延出した部分に、排気孔１１が設けられた固定電極ロッド３４ａと、他方のフランジ１ｂに設けられたベローズ７を介して延出した部分に、排気孔１１が設けられた可動電極ロッド３４ｂを用いた以外、実施の形態１の真空バルブと同様である。 Embodiment 3 FIG.
FIG. 6 is a schematic cross-sectional view showing the structure of a vacuum valve according to Embodiment 3 of the present invention.
FIG. 6 shows a state where the fixed electrode rod is attached to the fixed side terminal portion of the vacuum circuit breaker, and the movable electrode rod is attached to the movable side operation mechanism of the vacuum circuit breaker.
As shown in FIG. 6, the vacuum valve 300 of the present embodiment includes a fixed electrode rod 34a provided with an exhaust hole 11 in a portion extending from one flange 1a and a bellows provided on the other flange 1b. 7 is the same as the vacuum valve of the first embodiment, except that the movable electrode rod 34b provided with the exhaust hole 11 is used in a portion extending through 7.

本実施の形態の真空バルブ３００は、実施の形態１の真空バルブと同様な効果を有するとともに、図６に示すように、固定電極ロッド３４ａの上端の開口が、真空遮断器の固定側端子部２１で塞がれ、可動電極ロッド３４ｂの下端の開口が、真空遮断器の可動側操作機構２２で塞がれたとしても、固定電極５ａ内および可動電極５ｂ内の、例えば空気等の冷却媒体Ｅが、矢印のように流れ、外気と入れ替わることができ、固定接点３ａおよび可動接点３ｂを冷却できる。
本実施の形態における、固定電極ロッドの真空容器から延出した部分と、可動電極ロッドの真空容器から延出した部分とに、排気孔を設ける構造は、実施の形態２の真空バルブにも適用できる。 The vacuum valve 300 of the present embodiment has the same effect as the vacuum valve of the first embodiment, and, as shown in FIG. 6, the opening at the upper end of the fixed electrode rod 34a has a fixed terminal portion of the vacuum circuit breaker. Even if the opening at the lower end of the movable electrode rod 34b is blocked by the movable side operation mechanism 22 of the vacuum circuit breaker, a cooling medium such as air in the fixed electrode 5a and the movable electrode 5b. E flows as indicated by an arrow and can be replaced with outside air, and the fixed contact 3a and the movable contact 3b can be cooled.
The structure in which exhaust holes are provided in the portion of the fixed electrode rod extending from the vacuum vessel and the portion of the movable electrode rod extending from the vacuum vessel in the present embodiment is also applicable to the vacuum valve of the second embodiment. it can.

実施の形態４．
図７は、本発明の実施の形態４に係わる真空バルブの、接点と電極ロッドとの接合部の構造を示す断面模式図である。
図７に示すように、本実施の形態の真空バルブは、固定電極５ａが導板１２を介して固定接点３ａに接合された固定電極ロッド４４ａと、可動電極５ｂが導板１２を介して可動接点３ｂに接合された可動電極ロッド４４ｂとを用いた以外、実施の形態１の真空バルブと同様である。 Embodiment 4 FIG.
FIG. 7 is a schematic cross-sectional view showing the structure of the joint between the contact and the electrode rod in the vacuum valve according to Embodiment 4 of the present invention.
As shown in FIG. 7, the vacuum valve of the present embodiment includes a fixed electrode rod 44 a in which the fixed electrode 5 a is joined to the fixed contact 3 a through the conductive plate 12, and a movable electrode 5 b that is movable through the conductive plate 12. The vacuum valve is the same as that of the first embodiment except that the movable electrode rod 44b joined to the contact 3b is used.

本実施の形態の真空バルブは、実施の形態１の真空バルブと同様な効果を有するとともに、各電極５ａ，５ｂが、対応する接点３ａ，３ｂに導板１２を介して接合され、導板１２で真空シールされているので、接点の品質に関係なく、高品質な真空シールが実現できる。また、各接点３ａ，３ｂは、導板１２と接合しているので、熱容量が増加し、遮断時における接点の温度上昇を小さくでき、接点からの金属蒸気の発生が抑制され、遮断性能を向上できる。
本実施の形態の各電極が導板を介して対応する接点に接合される構造は、実施の形態２と実施の形態３との真空バルブにも適用できる。 The vacuum valve according to the present embodiment has the same effect as the vacuum valve according to the first embodiment, and the electrodes 5a and 5b are joined to the corresponding contacts 3a and 3b via the conductive plate 12, so that the conductive plate 12 Therefore, a high-quality vacuum seal can be realized regardless of the contact quality. Moreover, since each contact 3a, 3b is joined to the conducting plate 12, the heat capacity increases, the temperature rise of the contact at the time of interruption can be reduced, the generation of metal vapor from the contact is suppressed, and the interruption performance is improved. it can.
The structure in which each electrode of the present embodiment is joined to the corresponding contact via a conductive plate can also be applied to the vacuum valves of the second and third embodiments.

実施の形態５．
図８は、本発明の実施の形態５に係わる真空バルブの構造を示す断面模式図である。
図８に示すように、本実施の形態の真空バルブ５００は、固定電極５ａにおける固定接点側端部と反対側の端部に、固定側補強材６ａの内壁と接合した固着部１３を備えた固定電極ロッド５４ａと、可動電極５ｂにおける可動接点側端部と反対側の端部に、可動側補強材６ｂの内壁と接合した固着部１３を備えた可動電極ロッド５４ｂとを用いた以外、実施の形態１の真空バルブと同様である。
本実施の形態の真空バルブ５００は、実施の形態１の真空バルブと同様な効果を有するとともに、各電極５ａ，５ｂの一端が、対応する接点３ａ、３ｂに接合し、他端が対応する各補強材６ａ、６ｂの内壁に接合しているので、接離動作時の衝撃力に対する耐力がいっそう向上している。
本実施の形態における、各電極の他端が、対応する各補強材の内壁に接合した構造は、実施の形態２から実施の形態４のいずれの真空バルブにも適用できる。 Embodiment 5 FIG.
FIG. 8 is a schematic cross-sectional view showing the structure of a vacuum valve according to Embodiment 5 of the present invention.
As shown in FIG. 8, the vacuum valve 500 of the present embodiment includes a fixing portion 13 joined to the inner wall of the fixed-side reinforcing material 6a at the end of the fixed electrode 5a opposite to the fixed contact-side end. Implementation was performed except that the fixed electrode rod 54a and the movable electrode rod 54b provided with the fixed portion 13 joined to the inner wall of the movable side reinforcing member 6b at the end opposite to the movable contact side end portion of the movable electrode 5b were used. It is the same as that of the vacuum valve of the form 1.
The vacuum valve 500 of the present embodiment has the same effect as the vacuum valve of the first embodiment, and one end of each electrode 5a, 5b is joined to the corresponding contact 3a, 3b, and the other end Since it is joined to the inner walls of the reinforcing members 6a and 6b, the proof stress against the impact force during the contact / separation operation is further improved.
The structure in which the other end of each electrode in this embodiment is joined to the inner wall of the corresponding reinforcing member can be applied to any of the vacuum valves of the second to fourth embodiments.

実施の形態６．
図９は、本発明の実施の形態６に係わる真空バルブの構造を示す断面模式図である。
図９に示すように、本実施の形態の真空バルブ６００は、固定電極コイル部１０ａの径が固定電極コイル部１０ａ以外の径より大きい固定電極６５ａと固定電極６５ａと相似形の固定側補強材６６ａとで形成される固定電極ロッド６４ａ、および、可動電極コイル部１０ｂの径が可動電極コイル部１０ｂ以外の径より大きい可動電極６５ｂと可動電極６５ｂと相似形の可動側補強材６６ｂとで形成される可動電極ロッド６４ｂを用いた以外、実施の形態１の真空バルブと同様である。 Embodiment 6 FIG.
FIG. 9 is a schematic sectional view showing the structure of a vacuum valve according to Embodiment 6 of the present invention.
As shown in FIG. 9, the vacuum valve 600 according to the present embodiment includes a fixed electrode 65a and a fixed-side reinforcing material similar to the fixed electrode 65a in which the diameter of the fixed electrode coil portion 10a is larger than the diameter other than the fixed electrode coil portion 10a. 66a and a movable electrode coil portion 10b having a diameter larger than that of the movable electrode coil portion 10b and a movable side reinforcing material 66b similar to the movable electrode 65b. This is the same as the vacuum valve of the first embodiment except that the movable electrode rod 64b is used.

本実施の形態の真空バルブ６００は、実施の形態１の真空バルブと同様な効果を有するとともに、各電極のコイル部１０ａ，１０ｂの径を、コイル部１０ａ，１０ｂ以外の径より大きくしているので、真空バルブのサイズを大きくすることなしに、遮断電流を大きくすることができる。
本実施の形態における、各電極のコイル部の径をコイル部以外の径より大きくする構造は、実施の形態２から実施の形態５のいずれの真空バルブにも適用できる。 The vacuum valve 600 of the present embodiment has the same effect as the vacuum valve of the first embodiment, and the diameters of the coil portions 10a and 10b of each electrode are larger than the diameters other than the coil portions 10a and 10b. Therefore, the breaking current can be increased without increasing the size of the vacuum valve.
The structure in which the diameter of the coil portion of each electrode in the present embodiment is larger than the diameter other than the coil portion can be applied to any of the vacuum valves in the second to fifth embodiments.

実施の形態７．
図１０は、本発明の実施の形態７に係わる真空バルブの構造を示す断面模式図である。
図１０に示すように、本実施の形態の真空バルブ７００は、固定側電極６５ａと相似ではなく、径が真空容器１内で固定電極コイル部１０ａ側に向かって連続して大きくなった形状の固定側補強材７６ａ、および、可動側電極６５ｂと相似ではなく、径が真空容器１内で可動電極コイル部１０ｂ側に向かって連続して大きくなった形状の可動側補強材７６ｂを用いた以外、実施の形態６の真空バルブと同様である。
図１０では、各補強材７６ａ，７６ｂの径が連続して大きくなった部分の形状は円錐台である。
本実施の形態の真空バルブ７００は、実施の形態６の真空バルブと同様な効果を有するとともに、各補強材７６ａ，７６ｂの径が、真空容器１内において、対応する電極コイル部１０ａ，１０ｂ側に向かって傾斜して大きくなっているので、アークシールド２と電極ロッド７４ａ，７４ｂとの距離の偏りが小さく、電界を均一化でき、真空バルブの耐電圧が向上する。 Embodiment 7 FIG.
FIG. 10 is a schematic cross-sectional view showing the structure of a vacuum valve according to Embodiment 7 of the present invention.
As shown in FIG. 10, the vacuum valve 700 according to the present embodiment is not similar to the fixed electrode 65a, and has a shape in which the diameter continuously increases toward the fixed electrode coil portion 10a in the vacuum vessel 1. It is not similar to the fixed-side reinforcing material 76a and the movable-side electrode 65b, but the movable-side reinforcing material 76b having a shape in which the diameter continuously increases toward the movable electrode coil portion 10b in the vacuum vessel 1 is used. This is the same as the vacuum valve of the sixth embodiment.
In FIG. 10, the shape of the portion where the diameters of the reinforcing members 76a and 76b are continuously increased is a truncated cone.
The vacuum valve 700 of the present embodiment has the same effect as the vacuum valve of the sixth embodiment, and the diameters of the reinforcing members 76a and 76b are within the corresponding vacuum coil 1 on the corresponding electrode coil portions 10a and 10b side. Therefore, the deviation in the distance between the arc shield 2 and the electrode rods 74a and 74b is small, the electric field can be made uniform, and the withstand voltage of the vacuum valve is improved.

また、真空バルブの耐電圧性能を向上するため、製造段階で行われる電圧印加による繰り返し閃絡をして弱点部を潰すコンディショニングでは、電界が不均一だと電界の最大箇所に閃絡が集中しコンディショニング領域が限られる。しかし、本実施の形態の真空バルブ７００では、電界が均一なので、コンディショニング領域が増え、閃絡による表面改質および不純物や吸着ガスの除去を広範囲に実施することができ、真空バルブ全体の耐圧性能の安定化が図れる。
本実施の形態における、各補強材の径を、真空容器内において、対応する各電極のコイル部側に向かって連続して大きくする構造は、実施の形態２から実施の形態５のいずれの真空バルブにも適用できる。 Also, in order to improve the withstand voltage performance of the vacuum valve, in the conditioning that repeatedly flashes by applying voltage in the manufacturing stage and collapses the weak point, if the electric field is not uniform, the flashing will concentrate at the maximum point of the electric field. Conditioning area is limited. However, in the vacuum valve 700 of this embodiment, since the electric field is uniform, the conditioning area increases, surface modification by flashing and removal of impurities and adsorbed gas can be performed over a wide range, and the pressure resistance performance of the entire vacuum valve Can be stabilized.
The structure in which the diameter of each reinforcing member in the present embodiment is continuously increased toward the coil portion side of each corresponding electrode in the vacuum vessel is the vacuum of any of the second to fifth embodiments. It can also be applied to valves.

実施の形態８．
図１１は、本発明の実施の形態８に係わる真空バルブの構造を示す断面模式図である。
図１１は、固定電極ロッドが真空遮断器の固定側端子部に、可動電極ロッドが真空遮断器の可動側操作機構に取り付けられた状態を示している。
図１１に示すように、本実施の形態の真空バルブ８００では、固定電極５ａと固定電極５ａの内壁側に設けられた固定側補強材６ａとで形成された固定電極ロッド８４ａ、および、可動電極５ｂと可動電極５ｂの内壁側に設けられた可動側補強材６ｂとで形成された可動電極ロッド８４ｂを用いた以外、実施の形態１の真空バルブと同様である。
本実施の形態の真空バルブ８００は、実施の形態１の真空バルブと同様な効果を有するとともに、通電部である固定電極５ａと可動電極５ｂとが、各電極ロッド８４ａ，８４ｂの外周側にあるため、固定電極５ａを、固定側端子部２１の外部導体につながる上部端子２３に容易に接続でき、可動電極５ｂを、可動側操作機構２２の外部導体に連通する下部端子２４に容易に接続できる。 Embodiment 8 FIG.
FIG. 11 is a schematic sectional view showing the structure of a vacuum valve according to the eighth embodiment of the present invention.
FIG. 11 shows a state in which the fixed electrode rod is attached to the fixed side terminal portion of the vacuum circuit breaker, and the movable electrode rod is attached to the movable side operation mechanism of the vacuum circuit breaker.
As shown in FIG. 11, in the vacuum valve 800 of the present embodiment, a fixed electrode rod 84a formed of a fixed electrode 5a and a fixed-side reinforcing material 6a provided on the inner wall side of the fixed electrode 5a, and a movable electrode The vacuum valve is the same as that of the first embodiment except that a movable electrode rod 84b formed by 5b and a movable side reinforcing member 6b provided on the inner wall side of the movable electrode 5b is used.
The vacuum valve 800 of the present embodiment has the same effect as the vacuum valve of the first embodiment, and the fixed electrode 5a and the movable electrode 5b, which are current-carrying parts, are on the outer peripheral sides of the electrode rods 84a and 84b. Therefore, the fixed electrode 5a can be easily connected to the upper terminal 23 connected to the external conductor of the fixed side terminal portion 21, and the movable electrode 5b can be easily connected to the lower terminal 24 communicating with the external conductor of the movable side operation mechanism 22. .

実施の形態９．
図１２は、本発明の実施の形態９に係わる真空バルブの構造を示す断面模式図である。
図１２に示すように、本実施の形態の真空バルブ９００は、固定電極コイル部１０ａの径が固定電極コイル部１０ａ以外の径より大きい固定電極９５ａを備えた固定電極ロッド９４ａ、および、可動電極コイル部１０ｂの径が可動電極コイル部１０ｂ以外の径より大きい可動電極９５ｂを備えた可動電極ロッド９４ｂを用いた以外、実施の形態８の真空バルブと同様である。
本実施の形態の真空バルブ９００は、実施の形態８の真空バルブと同様な効果を有するとともに、各コイル部１０ａ，１０ｂの径が、コイル部１０ａ，１０ｂ以外の径より大きい各電極９５ａ，９５ｂが用いられているので、真空バルブのサイズを大きくすることなしに、短絡遮断性能を向上できる。
また、本実施の形態の真空バルブ９００は、各補強材６ａ，６ｂの径を小さくでき、各電極９５ａ，９５ｂのコイル部以外の部分の径を小さくできるので、ベローズ7の径、各フランジ１ａ，１ｂの孔径が小さくなり、真空バルブの組み立て性が向上し、低コスト化が可能となる。 Embodiment 9 FIG.
FIG. 12 is a schematic sectional view showing the structure of a vacuum valve according to the ninth embodiment of the present invention.
As shown in FIG. 12, the vacuum valve 900 of the present embodiment includes a fixed electrode rod 94a having a fixed electrode 95a in which the diameter of the fixed electrode coil portion 10a is larger than the diameter other than the fixed electrode coil portion 10a, and a movable electrode This is the same as the vacuum valve of the eighth embodiment except that the movable electrode rod 94b provided with the movable electrode 95b having a diameter of the coil portion 10b larger than that other than the movable electrode coil portion 10b is used.
The vacuum valve 900 of the present embodiment has the same effect as the vacuum valve of the eighth embodiment, and the diameters of the coil portions 10a and 10b are larger than the diameters of the electrodes 95a and 95b other than the coil portions 10a and 10b. Therefore, the short circuit breaking performance can be improved without increasing the size of the vacuum valve.
Further, the vacuum valve 900 of the present embodiment can reduce the diameters of the reinforcing members 6a and 6b and reduce the diameters of the portions other than the coil portions of the electrodes 95a and 95b, so the diameter of the bellows 7 and the flanges 1a. , 1b becomes smaller, the assemblability of the vacuum valve is improved, and the cost can be reduced.

本実施の形態の真空バルブ９００でも、各電極９５ａ，９５ｂには、導電率が大きな金属、例えば無酸素銅が用いられ、このような銅材は加工性に優れているので、各コイル部１０ａ，１０ｂが太くなった構造の電極９５ａ，９５ｂも容易に形成される。各電極９５ａ，９５ｂの加工は、例えば管状の銅材を圧縮、拡大プレスで行う。
また、各補強材６ａ，６ｂには、強度が要求される硬い材料、例えばステンレスが用いられるが、本実施の形態の補強材６ａ，６ｂは、構造が単純な管であるので、複雑な加工が不要である。
すなわち、本実施の形態の真空バルブ９００における、各コイル部１０ａ，１０ｂが太くなった構造の電極９５ａ，９５ｂを備えた電極ロッド９４ａ，９４ｂは容易に形成できる。 Also in the vacuum valve 900 of the present embodiment, each electrode 95a, 95b is made of a metal having a high conductivity, such as oxygen-free copper, and such a copper material is excellent in workability. , 10b can be easily formed. Each electrode 95a, 95b is processed by, for example, compressing and enlarging a tubular copper material.
The reinforcing members 6a and 6b are made of a hard material that requires high strength, such as stainless steel. However, the reinforcing members 6a and 6b of the present embodiment are pipes having a simple structure, and thus are complicatedly processed. Is unnecessary.
That is, in the vacuum valve 900 of the present embodiment, the electrode rods 94a and 94b including the electrodes 95a and 95b having a structure in which the coil portions 10a and 10b are thick can be easily formed.

本発明に係わる真空バルブは、アークスポットが局所的に留まるのを防止できるとともに、固定接点および可動接点を十分に冷却でき、固定電極ロッドと可動電極ロッドとの接点の接離時における耐衝撃性が向上したものであり、小型、高電圧、大電流容量の真空遮断器に用いることができる。 The vacuum valve according to the present invention can prevent the arc spot from staying locally, can sufficiently cool the fixed contact and the movable contact, and has an impact resistance when the contact between the fixed electrode rod and the movable electrode rod contacts and separates. It can be used for a vacuum breaker having a small size, a high voltage and a large current capacity.

１真空容器、１ａ，１ｂフランジ、２アークシールド、３ａ固定接点、
３ｂ可動接点、
４ａ，３４ａ，４４ａ，５４ａ，６４ａ，７４ａ，８４ａ，９４ａ固定電極ロッド、
４ｂ，３４ｂ，４４ｂ，５４ｂ，６４ｂ，７４ｂ，８４ｂ，９４ｂ可動電極ロッド、
５ａ，２５ａ，６５ａ，９５ａ固定電極、５ｂ，２５ｂ，６５ｂ，９５ｂ可動電極、
６ａ，６６ａ，７６ａ固定側補強材、６ｂ，６６ｂ，７６ｂ可動側補強材、
７ベローズ、８ａ，８ｂスリット、９ａ，９ｂ歯部、１０ａ固定電極コイル部、
１０ｂ可動電極コイル部、１１排気孔、１２導板、１３固着部、
２１固定子側端子、２２可動側操作機構、２３上部端子、２４下部端子、
１００，３００，５００，６００，７００，８００，９００真空バルブ、
Ａ電流、Ｂ磁場、Ｃ縦磁界、Ｄ拡散アーク、Ｅ冷却媒体、Ｆ発熱部、
Ｈ磁界、Ｌ磁気駆動力、Ｍ集中アーク。 1 vacuum vessel, 1a, 1b flange, 2 arc shield, 3a fixed contact,
3b movable contact,
4a, 34a, 44a, 54a, 64a, 74a, 84a, 94a fixed electrode rod,
4b, 34b, 44b, 54b, 64b, 74b, 84b, 94b movable electrode rod,
5a, 25a, 65a, 95a fixed electrode, 5b, 25b, 65b, 95b movable electrode,
6a, 66a, 76a Fixed side reinforcing material, 6b, 66b, 76b Movable side reinforcing material,
7 Bellows, 8a, 8b Slit, 9a, 9b Teeth, 10a Fixed electrode coil,
10b Movable electrode coil part, 11 exhaust hole, 12 conducting plate, 13 fixing part,
21 Stator side terminal, 22 Movable side operation mechanism, 23 Upper terminal, 24 Lower terminal,
100, 300, 500, 600, 700, 800, 900 vacuum valve,
A current, B magnetic field, C longitudinal magnetic field, D diffusion arc, E cooling medium, F heat generating part,
H magnetic field, L magnetic driving force, M concentrated arc.

Claims

Insulated cylindrical vacuum container with flanges joined to both ends, a contact and movable contact that can be separated from and held inside the vacuum container, one end joined to the fixed contact, and the other end to the one flange And a movable electrode rod having one end joined to the movable contact and the other end extended through a bellows provided on the other flange. The fixed electrode rod is formed of a tubular fixed electrode and a tubular reinforcing material provided on the outer peripheral side of the fixed electrode, and the movable electrode rod is formed on the outer peripheral side of the tubular movable electrode and the movable electrode. A fixed electrode coil portion formed by a plurality of slits inclined with respect to the axial direction of the fixed electrode is formed on the tube wall of the fixed contact side end portion of the fixed electrode. Movable electrode The tube wall of the dynamic contact side end portion, a plurality of vacuum valves movable electrode coil portion is formed by slits inclined with respect to the axial direction of the movable electrode.

The inclination direction of the slit formed in the fixed electrode coil part and the inclination direction of the slit formed in the movable electrode coil part are the same with respect to the axial direction passing through the fixed electrode and the movable electrode. The vacuum valve according to claim 1, wherein the vacuum valve is provided.

An inclination direction of the slit formed in the fixed electrode coil portion and an inclination direction of the slit formed in the movable electrode coil portion are opposite to an axial direction penetrating the fixed electrode and the movable electrode. The vacuum valve according to claim 1, wherein the vacuum valve is provided.

Exhaust holes are provided in a portion that extends through the one flange of the fixed electrode rod and a portion that extends through the bellows provided in the other flange of the movable electrode rod. The vacuum valve according to claim 1.

The vacuum valve according to claim 1, wherein the fixed electrode is joined to the fixed contact through a conductive plate, and the movable electrode is joined to the movable contact through a conductive plate.

The fixed electrode rod includes a fixed portion joined to an inner wall of the fixed-side reinforcing member at an end opposite to the fixed contact side end of the fixed electrode, and the movable electrode rod is connected to the movable contact side of the movable electrode. The vacuum valve according to claim 1, further comprising an adhering portion joined to an inner wall of the movable reinforcing member at an end opposite to the end.

The fixed electrode rod is formed of a fixed electrode in which the diameter of the fixed electrode coil portion is larger than the diameter other than the fixed electrode coil portion and a fixed-side reinforcing material provided on the outer peripheral side of the fixed electrode, and the movable electrode rod 2. The movable electrode coil portion is formed of a movable electrode having a diameter larger than a diameter other than the movable electrode coil portion, and a movable side reinforcing material provided on an outer peripheral side of the movable electrode. The vacuum valve as described in.

8. The vacuum valve according to claim 7, wherein the fixed-side reinforcing material is similar to the fixed electrode, and the movable-side reinforcing material is similar to the movable electrode.

The fixed side reinforcing material has a shape in which the diameter of the fixed side reinforcing material continuously increases toward the fixed electrode coil portion of the fixed electrode rod in the vacuum vessel, and the movable side reinforcing material is formed on the movable side. The vacuum valve according to claim 7, wherein the diameter of the reinforcing material is a shape that continuously increases toward the movable electrode coil portion of the movable electrode rod in the vacuum vessel.

The fixed electrode rod is formed of a tubular fixed electrode and a tubular fixed side reinforcing material provided on the inner wall side of the fixed electrode, and the movable electrode rod is formed on the inner side of the tubular movable electrode and the movable electrode. The vacuum valve according to claim 1, wherein the vacuum valve is formed of a tubular movable side reinforcing material provided.

The fixed electrode rod includes a fixed electrode in which a diameter of the fixed electrode coil portion is larger than a diameter other than the fixed electrode coil portion, and the movable electrode rod has a diameter of the movable electrode coil portion other than the diameter of the movable electrode coil portion. The vacuum valve according to claim 10, further comprising a larger movable electrode.