200847214 i 九、發明說明： " 【發明所屬之技術領域】 * 本發明係有關一種真空斷電器（vacuum interrupte]r)， 尤其有關一種圍繞著設於真空容器内之可接離的一對電極 而設置有電弧屏蔽之真空斷電器。 【先前技術】 真空斷電器在進行電流的切斷時，係令接觸於固定侧 電極的可動侧電極離開固定侧電極來進行電流切斷，但於 電流切斷進行時，在兩電極的接離點處，會產生電弧。而 伴隨該電弧的產生會產生金屬蒸汽，當該金屬蒸汽附著於 構成真空容H之絕緣容器的内面，則將使其絕緣特性下 I1牛，故，通常在真空斷電器係配置有電弧屏蔽圍繞兩電極 的接離點附近，而則該電弧屏蔽來防止金屬S汽附著於 絕緣容器内面。例如，如專利文獻i的第5圖所示，於電 孤屏敝的外徑御】設有凸部，並以硬焊㈣zing)方式盘 金屬件固定。 〆、 專利文獻1 :日本公開2000-294089號公報 【發明内容】 (發明所欲解決之課題） 驾知的真空斷電器之電弧屏蔽的外徑侧的 (emb〇SS)係必、須以切削或壓製（press)加工方式來製作 以[衣加卫方式製作電弧屏蔽的兩端部徑 之構造的電弧屏蔽時，魏屏蔽的最外徑部的尺寸= 變大’ μ“製作凸㈣4本便變高，並且凸部 31951? 5 200847214 徑部的尺寸公差亦變大。此外，當以切削加工方式製作凸 '部時，由於電弧屏蔽的最外徑部的尺寸公差大，若不將電 • 弧屏蔽的壁厚做厚點便無法加工，因此不僅是成本高，亦 有製作困難的情形。 當於支撐金屬件設置吸收凸部的外徑部的尺寸公差之 構造時，筒狀的絕緣容器内徑與電弧屏蔽外徑間必須有構 成吸收構造所需要的空間。真空斷電器的外徑尺寸係由切 斷事故電流所需要的電極直裡、耐電堡性能所需要的電極 •與電弧屏蔽間的空間距離、固定電弧屏蔽所需要的電弧屏 蔽與絕緣容器之間的尺寸、以及絕緣容器的壁厚來決定。 而當於支撐金屬件設有吸收尺寸公差的構造時，真空斷電 器的外徑便變大。 本發明乃提出解決前述問題的真空斷電器者。 (解決課題的手段） 本發明的真空斷電器係為具備將圓筒狀的第1、第2 _絕緣容器結合而構成之真空容器、收納於前述真空容器内 之可接離的一對電極、與圍繞該些兩電極而設置之筒狀的 電弧屏蔽之真空斷電器，其特徵為：經由環形狀的密封構 件將前述第1絕緣容器與第2絕緣容器結合，另一方面， 於前述電弧屏蔽係固定有包圍其外周之電弧屏蔽的固定用 金屬帶，並藉由使前述固定用金屬帶抵接於前述密封構件 而硬焊接合，而以前述密封構件支撐並固定前述電弧屏蔽。 此外，前述固定用金屬帶與密封構件之接合方式係使 固定用金屬帶的侧端面的整體或一部分抵接於前述密封構 6 319517 200847214 i 件的侧面而接合。 - 此外，前述電弧屏蔽與固定用金屬帶係以焊接方式固 • 定。 此外，前述固定用金屬帶係於環形狀的一處設有切口。 (發明的效果） 依據本發明的真空斷電器，由於能夠支撐固定能吸收 電弧屏蔽的製作過程中的尺寸差異之電弧屏叙^所以電孤 屏蔽能夠使用以壓製加工方式製成的廉價品，並且固定用 馨金屬帶亦能夠以壓製加工方式便宜地製作。因此，能夠減 少真空斷電器的成本。 此外，簡化了電弧屏蔽的固定方法，能夠使電弧屏蔽 及固定用金屬帶與絕緣容器間的空間尺寸最小化，所以能 夠做到絕緣容器的外徑尺寸的最小化，即真空斷電器的小 型化。 【實施方式】 •實施形態1 第1圖係顯示本實施形態1的真空斷電器的構成之剖 視圖。該真空斷電器係具有由氧化鋁陶瓷（alumina ceramics)等材料形成之筒狀的第1、第2絕緣容器la、lb， 將這些第1、第2絕緣容器la、lb結合而構成筒狀的真空 容器30。第1絕緣容器la的一端係以固定侧端板2氣密 地封閉。第2絕緣容器lb的一端係以可動侧端板3封閉。 該些固定侧及可動侧端板2及3係分別硬焊於絕緣容器 la、lb的端面而安裝於同軸上。 7 319517 - 200847214 於以絕緣容器la、lb而形成的真空容器％内，固定 電極棒4與可動電極棒7係相對向設置，於固定電極棒* 綠κ古η*备帝4 、了動電極棒7的前端係 硬知有可動笔極6。固定電極 鈿 配置於直命交哭丁貝牙固疋侧知板2而 2。另i二Γ 且氣密地硬輝接合於固定側端板 口3㈤杆’/動電極棒7係通過設於可動側端板3的開 二入真空容器3〇内，透過伸縮囊( 裝 於可動侧端板3,該伸缩嚢s在如i 备 蛇腹狀且-切η 以薄的不鎮鋼製作成 而配-由二Γ氣密一邊能夠移動可動侧電極棒7 而配汉。由於該伸縮囊8， . 固定電極5與可動電極6#喜、7係沿軸方向動作， 動书極6係一邊保持真空容器30的直介濟 密一邊能夠做接離。 谷α。儿的真工轧 筒狀的第1與第2绍绘0 Ί μ 甘ΒΒ 巴緣谷态1a與〗b係硬焊於配嗖於 其之間的密封構件9而接合。封 、-»又於 第_斤示的環狀，為被夹;ΓΓ第= ，之間接合該兩容 _ 谷益la、200847214 i IX, invention description: " [Technical field of invention] * The present invention relates to a vacuum interrupter (r), and more particularly to a pair of detachable ones disposed in a vacuum container The electrode is provided with an arc-shielded vacuum breaker. [Prior Art] When the vacuum interrupter cuts off the current, the movable side electrode contacting the fixed side electrode is separated from the fixed side electrode to perform current cut, but when the current cut is performed, the connection between the two electrodes is performed. At the point of departure, an arc is generated. With the generation of the arc, metal vapor is generated. When the metal vapor adheres to the inner surface of the insulating container constituting the vacuum capacity H, the insulating property is made to be I1, so that the arc shield is usually disposed in the vacuum breaker. The arc shield is placed around the junction of the two electrodes to prevent the metal S from adhering to the inner surface of the insulating container. For example, as shown in Fig. 5 of the patent document i, the outer diameter of the electric screen is provided with a convex portion, and is fixed by a hard metal welding method.专利 专利 专利 专利 2000 2000 2000 2000 2000 2000 ( em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em em When the arc-shielding of the structure of the both ends of the arc shield is made by the cutting or pressing method, the size of the outermost diameter portion of the Wei shield becomes larger = μ "4" The height is increased, and the dimensional tolerance of the diameter of the convex portion 31951? 5 200847214 is also increased. In addition, when the convex portion is formed by the cutting method, since the outer diameter portion of the arc shield has a large dimensional tolerance, if the electric resistance is not large, • The wall thickness of the arc shield cannot be processed because it is thick, so it is not only costly but also difficult to manufacture. When the support metal member is provided with the dimensional tolerance of the outer diameter portion of the absorption convex portion, the cylindrical insulation There must be a space between the inner diameter of the vessel and the outer diameter of the arc shield to form the absorption structure. The outer diameter of the vacuum breaker is the electrode required to cut off the accident current and the electrode required for the performance of the electric castle. Screen The spatial distance between the arc shield and the size of the insulating container required for the fixed arc shield, and the wall thickness of the insulating container are determined. When the supporting metal member is provided with a structure for absorbing dimensional tolerance, the vacuum interrupter is The present invention is directed to a vacuum interrupter that solves the above problems. (Means for Solving the Problem) The vacuum interrupter of the present invention is provided with a cylindrical first and second _ insulating container And a vacuum container formed, a pair of separable electrodes housed in the vacuum container, and a cylindrical arc-shielded vacuum breaker disposed around the two electrodes, characterized by: a seal through a ring shape The member is coupled to the first insulating container and the second insulating container. On the other hand, a fixing metal strip surrounding the arc shield of the outer circumference is fixed to the arc shield, and the fixing metal strip is brought into contact with the aforementioned metal strip. The sealing member is hard welded, and the arc shield is supported and fixed by the sealing member. Further, the fixing metal strip and the sealing member are joined to each other. The whole or a part of the side end surface of the metal strip is joined to the side surface of the sealing member 6 319 517 200847214 i. Further, the arc shield and the fixing metal strip are fixed by welding. The metal strip is provided with a slit at one place of the ring shape. (Effect of the Invention) The vacuum interrupter according to the present invention is capable of supporting an arc screen of a size difference in a manufacturing process capable of absorbing an arc shield. The shield can use a cheap product made by press working, and the fixing sinus metal strip can also be produced inexpensively by press working. Therefore, the cost of the vacuum breaker can be reduced. Further, the fixing method of the arc shield is simplified. Since the space between the arc shield and the fixing metal strip and the insulating container can be minimized, the outer diameter of the insulating container can be minimized, that is, the size of the vacuum interrupter can be reduced. [Embodiment] Embodiment 1 Fig. 1 is a cross-sectional view showing the configuration of a vacuum interrupter according to a first embodiment. The vacuum breaker has a cylindrical first and second insulating containers 1a and 1b formed of a material such as alumina ceramics, and the first and second insulating containers 1a and 1b are combined to form a cylindrical shape. Vacuum container 30. One end of the first insulating container 1a is hermetically sealed by the fixed side end plate 2. One end of the second insulating container 1b is closed by the movable side end plate 3. The fixed side and movable side end plates 2 and 3 are respectively brazed to the end faces of the insulating containers la and lb and mounted on the coaxial. 7 319517 - 200847214 In the vacuum container % formed by the insulating containers la, lb, the fixed electrode rod 4 and the movable electrode rod 7 are arranged opposite to each other, and the fixed electrode rod * green κ η 备 备 备 4 The front end of the rod 7 is known to have a movable pen pole 6. The fixed electrode 钿 is placed on the side of the sacred sputum. The other two Γ 气 气 气 气 气 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定 固定The movable side end plate 3 is configured such that it is made of a bellows-like shape and a tantalum is made of a thin non-town steel, and the movable side electrode rod 7 can be moved by the airtight side of the two sides. The bellows 8, the fixed electrode 5 and the movable electrode 6#, 7 are operated in the axial direction, and the movable book 6 can be separated while maintaining the tightness of the vacuum container 30. The valley is rolled. The cylindrical first and second etched 0 Ί μ Gan ΒΒ 缘 谷 谷 谷 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Ring, for being clamped; ΓΓ第= , joining the two volumes _ 谷益la,
的壁厚而歧微突寸為大於絕緣容器U 緣容器la，的硬輝接合部的殘留應力而以口 或銅合金來製作。或者 乂車人貝孟屬的銅 U相近的柯^但熱膨脹率與絕緣容m 定電極5、可動1極6^ ·錄合金來製作亦可。於固 j動包極6與絕緣容器u、比 * 弧屏蔽包圍兩電極5、的崎 、王間故有电 H)係為防止因以電極5Γ =點附近周圍。該電弧屏蔽 產生之電極的全屬3與可動電極6之間產生的電弧而 電極的至屬条汽附著於絕緣容器㈣的 319517 8 200847214 4 固定侧與可動侧間的絕緣特性降低者。 屏㈣1()係具有兩端為往内複側縮入之形狀的 鈿徑。M〇a、i〇b。此係具有抑制因 Β朴+ n朴 w u电狐而產生之電極的金The wall thickness and the micro-bump are made larger than the residual stress of the hard-glued joint portion of the U-edge container la of the insulating container, and are made of a port or a copper alloy. Or the copper U of the 乂人人贝孟 is close to the ke, but the thermal expansion rate and the insulating capacity of the fixed electrode 5, the movable 1 pole 6^ In the case of the solid-state pole 6 and the insulating container u, the ratio of the *-arc shield surrounds the two electrodes 5, and there is electricity between the king and the king. H) is to prevent the electrode 5Γ from being around the point. The arc generated by the arc shield generates an arc between the entire genus 3 and the movable electrode 6 and the genus of the electrode is attached to the insulating container (4) 319517 8 200847214 4 The insulating property between the fixed side and the movable side is lowered. The screen (4) 1 () has a diameter that has a shape in which both ends are retracted toward the inward side. M〇a, i〇b. This system has a gold that suppresses the electrode generated by the simple + n pu w u electric fox.
屬瘵况附者於絕緣容器la、lbR 制於日丄 面的夏，但當以壓製加工 方式衣作具有縮徑部10a、1〇b的 上 曰7电弧屏敝10時，電弧屏 敝取外徑的尺寸公差係變大為±0.5mm以上。 於電孤屏蔽H)的外周係固定有壁厚約〇5麵至 環狀固定用金屬帶1卜該環狀固定用金屬帶U 述用以支撐固定電弧屏蔽1〇者，如第3圖的俯視 圖（m刚視圖（B)中放大顯示的其形狀，將厚度〇5mm至 .〇随的長條狀的板成形為環形狀，於環狀的—處設有切 2部山。電弧屏蔽10與固定用金屬帶u的固定方法的 一，為硬焊接合(brazing)。例如有，#真空斷電器的其他 更焊接σ。卩使用的硬焊填料為銀_銅類的硬焊填料時，使用 :點更高的鎳_銅類硬焊填料來進行硬焊接合之方法。這是 士於當在真空爐内進行真空斷電器的最終密封硬焊接合 ^若使用相同溶點的硬焊填料，電弧屏蔽1〇與固定用金 声π 1的硬焊接合部有因為再度炫化而使接合脫落之 二册此外’ f 2種固定方法為，當電弧屏蔽1〇與固定用金 η兩者皆為不銹鋼製時，以焊接（welding)方式進行接 知·別是以點知接（spotweiding)進行揍合，既簡單又便 宜。 第2圖係放大顯示本發明的實施形態〗的主要部分的 構成之剖視圖。固W電弧屏蔽1G的岐用金屬帶n係 319517 200847214It belongs to the case that the insulating containers la, lbR are made in the summer of the sundial surface, but when the upper casing 7 arc screen 10 having the reduced diameter portions 10a, 1〇b is made by pressing processing, the arc screen is taken. The dimensional tolerance of the outer diameter is increased to ±0.5 mm or more. The outer circumference of the electric shield H) is fixed with a wall thickness of about 5 faces to the annular fixing metal strip 1 . The annular fixing metal strip U is used to support the fixed arc shield 1 , as shown in FIG. 3 . The shape of the top view (m) is enlarged in the view (B), and the elongated plate having a thickness of 〇5 mm to 〇 is formed into a ring shape, and two mountains are cut at the annular shape. The arc shield 10 One of the fixing methods of the fixing metal strip u is brazing. For example, there are other welding σ of the vacuum interrupter. When the brazing filler used is a silver-copper brazing filler Use: a higher nickel-copper brazing filler to carry out the method of hard soldering. This is the final sealing and hard soldering of the vacuum breaker in the vacuum furnace. If the same melting point is used, The welding filler, the arc shield 1〇 and the hard-welded joint of the fixed gold sound π 1 have two joints due to re-shocking, and the 'f 2 kinds of fixing methods are: when the arc shield 1〇 and the fixed gold η When both are made of stainless steel, they are welded by welding. The iding) is simple and convenient. Fig. 2 is a cross-sectional view showing the configuration of the main part of the embodiment of the present invention in an enlarged manner. The solid metal strip for the solid-W arc shield 1G is 319517 200847214
:於第】、第2絕緣容器1a、ib之間的密封件構 .二牛弧屏蔽！。與密封構件9係由於電弧屏蔽1G的尺 二而無法直接硬谭’所以使固定用金屬帶u介在電弧 5 〇與密封構件9之間，然後再接合固定用金屬帶U 與密封構件9。該接合係，固定用金屬帶u的—側端面1 接於密封構件调私面抵 、側舄面而硬焊接合。由於固定用金屬帶 β册、·5_至1〇_的厚度，以該範圍改變固定用全 =的側端面與密封構件9魏^ 1G的尺寸變化差異。但是，_屏 2定用金屬帶η抵接，此情況下則僅將有抵接處硬^ …1的固定例之剖視圖。僅顯示第1圖的 口丨J面上的電弧屏蔽1 〇鱼 册 ，屏蔽10的周圍固定有固定用金U :。=電弧 K? * 蜀^Γ 11之狀悲。此例係雷 接與固定用金屬帶11兩者皆為不銹鋼製並以點焊 ^方式固定，_部2〇係有5處。基屬 二：^屬帶U與電弧屏蔽1〇其必要的固定強度的 的數目係考慮作業性並且固定用金屬帶u 於電弧屏蔽!。之狀態的最大外=定:金屬帶11固定 器1，徑’所以一邊二Γ:須小於第1絕緣容 人/、反制一邊進行點焊接。夾具 319517 10 200847214 係設計成能使所接合之固定用金屬帶n纟最大容許外形 之範，内。固定用金屬帶n的壁厚係為〇5mm至i〇mm， 比較薄且具有彈性，故如第4圖所示，焊接部2〇間係產生 有進行點焊接時往外徑側膨脹的部分。 利用該膨脹的部分，便能夠吸收電弧屏蔽10的最外徑 尺寸的差異與密封構件9的内徑尺寸的差異與固定用金^ π 11 土厚的差異。此為從能承受在電極動作時產生的對電 弧屏蔽1G的重覆衝擊之固定用金屬帶u與密封構件9的 固著強度來判斷’所以不需將固定用金屬帶η與密封構件 9整圈皆進行硬焊連接。即使是#固定用金屬帶η的壁厚 較薄時，料設定成制定用金屬帶u完全地沿著電弧屏 蔽10的最大外徑貝占合時其切口部lla幾乎為〇麵， 夠在電弧屏蔽10$最小外徑尺寸時，使固定金屬帶 接於密封構件9〇 依據Μι述構k ’具有將兩端往内徑側縮入的縮徑 =、議之構造的電弧屏蔽10係能多句使用以尺寸差異會 變大的壓製加工方式製成的廉價品，並且固定用金屬帶u 構造亦簡單’所則⑽關製加4式便宜地製作。因此， 用做真空斷電器能夠減少成本。/ 此外，簡化了電孤屏蔽1G的固定方法，能夠最小化電 弧屏蔽10及固定用金屬帶u與絕緣容器Ia、ib間的空間 尺寸，所以能夠做龜緣容it的外徑尺寸的最小化，即直 空斷電器的小型化。 ’ 〜 【圖式簡單說明】 319517 11: In the first], the second insulating container 1a, ib seal structure. Two cattle arc shield! . Since the sealing member 9 cannot be directly hardened by the ruler of the arc shield 1G, the fixing metal strip u is interposed between the arc 5 〇 and the sealing member 9, and then the fixing metal strip U and the sealing member 9 are joined. In the joint system, the side end surface 1 of the fixing metal strip u is joined to the sealing member to the private surface and the side surface to be hard welded. Due to the thickness of the metal strip for fixing, 5_ to 1〇_, the difference in dimensional change between the side end surface of the fixing all = and the sealing member 9 Wei 1 G is changed in this range. However, the _ panel 2 is fixed by the metal strip η. In this case, only a cross-sectional view of the fixing example of the abutting portion 1 is provided. Only the arc shield 1 squid on the surface of the mouth J of Fig. 1 is displayed, and the fixing gold U is fixed around the shield 10. =Arc K? * 蜀^Γ 11 is sad. In this example, both the lightning and fixing metal strips 11 are made of stainless steel and fixed by spot welding, and there are five sections of the _ section. Base 2: The number of U-bands and arc shields 1 required for their fixed strength is considered to be workability and the metal strip u is fixed to the arc shield! The maximum outer state of the state is as follows: the metal strip 11 is fixed to the holder 1, and the diameter is "two sides": it must be smaller than the first insulating capacity / and the side of the counter is welded. The fixture 319517 10 200847214 is designed to provide the maximum allowable shape of the bonded metal strip. The thickness of the fixing metal strip n is 〇5 mm to i〇mm, which is relatively thin and elastic. Therefore, as shown in Fig. 4, the welded portion 2 has a portion which is expanded toward the outer diameter side during spot welding. With this expanded portion, it is possible to absorb the difference between the difference in the outer diameter dimension of the arc shield 10 and the inner diameter dimension of the sealing member 9 and the difference in the thickness of the fixing gold π 11 . This is judged from the fixing strength of the fixing metal strip u and the sealing member 9 capable of withstanding the repeated impact on the arc shield 1G generated during the operation of the electrode. Therefore, it is not necessary to fix the fixing metal strip η and the sealing member 9 The rings are all soldered. Even when the wall thickness of the #fixing metal strip η is thin, the material is set such that the metal strip u completely surrounds the maximum outer diameter of the arc shield 10, and the slit portion 11a is almost a surface, which is sufficient for the arc. When the minimum outer diameter of the shield is 10$, the fixed metal strip is connected to the sealing member 9 〇 according to the description k' has a reduced diameter of the both ends toward the inner diameter side = the arc shield 10 of the structure can be more In the sentence, a cheap product made by a press working method in which the difference in size is increased is used, and the structure of the fixing metal strip u is also simple, and the (10) closed type is inexpensively produced. Therefore, using a vacuum breaker can reduce costs. / In addition, the method of fixing the electric orphan shield 1G is simplified, and the space size between the arc shield 10 and the fixing metal strip u and the insulating containers Ia and ib can be minimized, so that the outer diameter size of the turtle edge can be minimized. That is, the miniaturization of straight air breakers. ’ ~ [Simple description] 319517 11
I 200847214 第1圖係顯示本發明的實施形態！的直空 '視圖。 /、崎电裔之剖 弟2圖係放大顯示貫施形態1的主要部分之刊視园 第3圖係放大顯示實施形態1的固定用金屬冊 圖（A)與前視圖（B)。 ^ ^視 弟4圖係顯示實施形態1的電孤屏蔽與固定用金屬帶 的固定例之剖視圖。 弟5圖係放大顯示貫施形悲1的密封構件之俯視圖（a) •與前視圖（B) 〇 【主要元件符號說明】 la 第1絕緣容器 lb 第2絕緣容器 2 固定侧端板 3 可動侧端板 3a 開口 4 固定電極棒 5 固定電極 6 可動電極 7 可動電極棒 8 伸縮囊 9 密封構件 10 電弧屏蔽 10a、 10b 縮徑部 11 固定用金屬帶 11a 切口部 20 焊接部 30 真空容器 319517 12I 200847214 Fig. 1 shows an embodiment of the present invention! Straight empty 'view. Fig. 2 is a view showing a main part of the image of the first aspect of the first embodiment. Fig. 3 is an enlarged view showing the metal sheet for fixing (A) and the front view (B) of the first embodiment. Fig. 4 is a cross-sectional view showing a fixing example of the electric orphan shield and the fixing metal strip of the first embodiment. Figure 5 is a top view of the sealing member of the singularity 1 (a) • Front view (B) 〇 [Main component symbol description] la 1st insulating container lb 2nd insulating container 2 Fixed side end plate 3 movable Side end plate 3a opening 4 fixed electrode rod 5 fixed electrode 6 movable electrode 7 movable electrode rod 8 bellows 9 sealing member 10 arc shield 10a, 10b reduced diameter portion 11 fixing metal strip 11a slit portion 20 welded portion 30 vacuum container 319517 12