JPS59204224A - Vaccum valve operating mechanism of-load tap changer - Google Patents

Abstract

PURPOSE:To hold correctly timing of opening and closing, and the speed of opening and closing of the vacuum valve operating mechanism of an on-load tap changer by a method wherein a protruding cam surface to enlarge pressure loading of a spring at the first stage of a rotation is annexed to a first cam to make a valve to perform opening action. CONSTITUTION:A vaccum valve 51 furnished with a fixed rod 52 and a movable rod 53 performes opening and closing action according to the rotation of a rotary disk 63 fixed to a driving shaft 64 and cams 62, 65, 72. The movable rod 53 is driven according to the rotation of the cams 62, 65, 72 through a cam roller 61, a guide rod 58, a basket 56, and a pressure spring 73. The cam 72 is provided with a cam surface 66 protruded on the outside peripheral circle 65 avoiding the position to come in contact with the cam roller 61 at vacuum valve normally closing time of the cam 62, and the cam roller 61 is pushed up in the fixed rod 52 direction still more than vacuum valve normally closing time. Accordingly, the correct speed of opening and closing, and timing of the vacuum valve can be secured.

Description

【発明の詳細な説明】 この発明は真空パルプ成員荷時タップ切換器に関し、特
に各真空パルプ間の開閉タイミングを正確に保つ方法に
係わる。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vacuum pulp member loading tap changer, and more particularly to a method for maintaining accurate opening/closing timing between each vacuum pulp.

第１図は一般に行なわれているＸ全パルプ大負荷時タッ
プ切換器の一相分の主回路側図で、一つの抵抗ｒとその
抵抗用真空バルブＲと二つの主真空バルブＡ、Ｂをもっ
た１抵抗３真をバルブ成魚荷時タッグ切換器の切挨順序
を示す。これらの真空バルブの一方の端子は一括して中
性点に接続され、主真空バルブＡ、Ｅの他方の端子はそ
れぞれ変圧器の巻線ｌの隣接した異なるタップ’ｌ’ｌ
、Ｔ２を選択する選択器２ａ、　２ｂに接続され、残る
真空バルブＲの他方の端子は限流抵抗ｒを介してタップ
選択器２ａ、　２ｂのいずれか一方に接続される（図で
は２ｂに接続）。Figure 1 is a side view of the main circuit for one phase of a commonly used X-pulp heavy-load tap changer, which includes one resistor r, a vacuum valve R for the resistor, and two main vacuum valves A and B. The following shows the switching order of the tag switch when loading adult fish with 1 resistor and 3 true valves. One terminal of these vacuum valves is connected collectively to the neutral point, and the other terminals of the main vacuum valves A, E are respectively connected to different adjacent taps 'l'l of winding l of the transformer.
, T2, and the other terminal of the remaining vacuum valve R is connected to either one of the tap selectors 2a, 2b via a current limiting resistor r (in the figure, it is connected to 2b). ).

巻線１のタップＴＩからＴ２への切シ換えは図？　（１
）　、　ｆ２１　、　（３）　、　（４１の順に真空バ
ルブが開閉し、タッグＴ２からＴＩへの切シ換えは逆に
（４）から（１）へのＪＩＲに真空バルブが開閉する。Is the diagram how to switch winding 1 from tap TI to T2? (1
), f21, (3), (The vacuum valve opens and closes in the order of 41, and when switching from tag T2 to TI, conversely, the vacuum valve opens and closes from JIR from (4) to (1).

図においてハツチングは閉状態を示す。主真空バルブＢ
の通電状態においては抵抗用真空パルプＲは開となって
ももちろんよい訳であるが、抵抗ｒのために流れる電流
が微少なために閉として主真空パルプＢと並列に通電し
ても差し支えなく、この方が機構的にも有利なため、タ
ップ切シ換え動作を第１図ｆｌ）→（４）または（４）
→（１１０間で行なうのが一般的である。In the figure, hatching indicates a closed state. Main vacuum valve B
In the energized state, the resistance vacuum pulp R can of course be open, but since the current flowing due to the resistance r is small, it can be closed and energized in parallel with the main vacuum pulp B. , since this is mechanically advantageous, the tap switching operation is changed to Fig. 1 fl) → (4) or (4).
→(It is common to do this between 110 and 110 minutes.

第２図はクランク２１．連結棒２２．揺動レバ２３、切
換レバ２４．引張９ばね２５．ストッパ２６とから々る
速動機構２７を含む切換機構図で、Ｑｌ、　Ｑ２．　Ｑ
３は固定された駆動軸を示す。クランク２１が駆動軸０
３を中心に時計方向に回転することにより、連結棒２２
を連結させた揺動レバ２３が軸０１を回動の中心として
揺動運動を行なう。揺動レバ２３の先端に設けられた支
点Ｐと、駆動軸０２に固定された切換レバ２４の先端に
設けられた支点９間には引張りばね２５が取り付けられ
、このばねは揺動レバ２３の動作に応じて蓄勢され、Ｑ
、０２．Ｐが同一直線上に並ぶ点（死点）を越した時に
蓄勢されたエネルギーを急激に放出し、切シ換えレバ２
４をストッパ２６で止められるまで動かすことにより駆
動軸０２を回転させる。Figure 2 shows crank 21. Connecting rod 22. Swing lever 23, switching lever 24. Tension 9 spring 25. A switching mechanism diagram including a stopper 26 and a quick-moving mechanism 27, Ql, Q2. Q
3 indicates a fixed drive shaft. Crank 21 is drive shaft 0
By rotating clockwise around 3, the connecting rod 22
A swinging lever 23 connected to the shaft 01 performs swinging motion with the shaft 01 as the center of rotation. A tension spring 25 is attached between a fulcrum P provided at the tip of the swing lever 23 and a fulcrum 9 provided at the tip of the switching lever 24 fixed to the drive shaft 02. Energy is stored according to the movement, and Q
, 02. When P passes the point where they are aligned on the same straight line (dead center), the stored energy is suddenly released, and the switching lever 2
4 until it is stopped by a stopper 26, the drive shaft 02 is rotated.

駆動軸０２には真空パルプＡ、Ｂ、Ｒ開閉用の開閉装置
２８が設けられ、この動作により真空バルブＢ、　　Ｒ
，Ａを開閉する。この動作図と真空バルブの開閉順序を
示したのが第３図で、タップＴ１からＴ２への切シ換え
順序を示し、（１）→（２）→（３）で１）　Ｑ間に点
線で示す引張りばね２５が蓄勢され、（４）→（７）で
蓄勢されたエネルギーを放出することにより各真空バル
ブが開閉されてタップの切り換えが完了する。第４図は
タッグＴ２からＴ１への切り換え順序を示し、（１）→
（２）で支点Ｐ、Ｑ間の引張りばね２５が蓄勢され、（
３）→（６）でそのエネルギーを放出することによシ切
シ換えが完了する。なお、第３，４図は第２図に対応す
る。The drive shaft 02 is provided with a switching device 28 for opening and closing the vacuum pulps A, B, and R, and this operation opens and closes the vacuum valves B and R.
,A open and close. Figure 3 shows this operation diagram and the opening/closing order of the vacuum valve, showing the switching order from tap T1 to T2. The tension spring 25 shown by is stored, and by releasing the stored energy in steps (4) to (7), each vacuum valve is opened and closed, and the tap switching is completed. Figure 4 shows the switching order from tag T2 to T1, (1)→
At (2), the tension spring 25 between the fulcrums P and Q is stored, and (
The switching is completed by releasing the energy in steps 3) and (6). Note that FIGS. 3 and 4 correspond to FIG. 2.

第５図は駆動軸６４　（０２）　　に取シ付けられた開
閉装置２８と真空バルブ操作機構５４を示しく１）は真
空バルブの閉状態、（２）は真空バルブの開状態を示す
。図において真空バルブ５１はその真空となった内部に
固定ロッド５２と該ロッドの軸方向に固定ロンド端と接
触して閉路し、離れて開路する可動ロッド５３とを備え
る。そして真空バルブ操作機構５４としてはいずれも前
記両ロッド５２゜５３の軸の延長上に設けられた加圧ば
ね５５、加圧ばね５５を収容しその一端が可動ロッド５
３の空中に突出した先端と係合して固定ロッド５２と離
れるように引張るかご５６、かご５６の他端に固定され
支持物５７に案内されるガイドロッド５８、ガイドロッ
ド５８の先端に取り付けられる肩５９、肩５９と支持物
５７との間にガイドロッド５８を囲んで配された加圧ば
ね６０、および肩５９に回転自在に支持されたカムロー
ラ６１を備える。カムローラ６１は開閉装置２８によシ
可動ロジド５３の軸方向に変位されて真空・クルリプ５
１を開閉する。開閉装置２８はカムローラ６１を押し上
げるカム６２とこのカム６２をその円周上に支持する回
転円板６３とよりなり、駆動軸６４（０２）に固定され
ている。FIG. 5 shows the opening/closing device 28 and the vacuum valve operation mechanism 54 attached to the drive shaft 64 (02). 1) shows the vacuum valve in the closed state, and (2) shows the vacuum valve in the open state. In the figure, a vacuum valve 51 has a fixed rod 52 in its vacuumed interior and a movable rod 53 that contacts a fixed rond end in the axial direction of the rod to close the circuit, and separates to open the circuit. The vacuum valve operation mechanism 54 accommodates a pressure spring 55 provided on the extension of the axes of both rods 52 and 53, one end of which is connected to the movable rod 5.
A cage 56 is engaged with the tip protruding into the air of No. 3 and pulled away from the fixed rod 52, a guide rod 58 is fixed to the other end of the cage 56 and guided by a support 57, and is attached to the tip of the guide rod 58. A shoulder 59, a pressure spring 60 disposed between the shoulder 59 and the support 57 surrounding the guide rod 58, and a cam roller 61 rotatably supported by the shoulder 59 are provided. The cam roller 61 is displaced in the axial direction of the movable log 53 by the opening/closing device 28 and
Open and close 1. The opening/closing device 28 includes a cam 62 that pushes up a cam roller 61 and a rotating disk 63 that supports the cam 62 on its circumference, and is fixed to a drive shaft 64 (02).

第６図は駆動軸６４（０２）が角度θ＝φ１＋α＋β＋
γ＋φ２だけ回転することによるカムローラ６１の動き
を略示したもので、各回転角に合わせて中心０２とカム
ローラ６１の中心とを結ぶ距離が変化する図であるが、
わかり易くするだめにカムローラ６１がカム６２の周上
を動くように描いである。駆動軸６４が反時計方向に角
度φ１＋α＋β＋γ（φ１は動作当初の遊び回転である
）回転すればカム６２上をカムローラ６１が動き、真空
ノくルプが閉とな如、その後に角度φ２の遊び回転をし
てカムは停止する。この状態から駆動軸６４が時計方向
に角度φ２＋γ＋β＋α回転すれば真空ノくルプは完全
に開となり、その後φ１の遊び回転をしカムは停止する
。なおθは駆動軸６４の全回転角である◇ 第７図は真空バルブが開閉するために必要な駆動軸（第
５図の０２．６４　）のトルクをカムの回転に合わせて
描いたトルク線図で、カム回転角α。In Figure 6, the drive shaft 64 (02) is at an angle θ=φ1+α+β+
This diagram schematically shows the movement of the cam roller 61 due to rotation by γ+φ2, and the distance connecting the center 02 and the center of the cam roller 61 changes according to each rotation angle.
For the sake of clarity, the cam roller 61 is depicted as moving around the cam 62. When the drive shaft 64 rotates counterclockwise through an angle of φ1 + α + β + γ (φ1 is the free rotation at the beginning of operation), the cam roller 61 moves on the cam 62, and the vacuum nozzle closes, which then rotates with an angle of φ2. and the cam will stop. From this state, when the drive shaft 64 rotates clockwise by an angle of φ2+γ+β+α, the vacuum nozzle is completely opened, and then the cam rotates by an amount of φ1 and the cam stops. Note that θ is the total rotation angle of the drive shaft 64 ◇ Figure 7 is a torque line drawn by matching the torque of the drive shaft (02.64 in Figure 5) necessary for opening and closing the vacuum valve to the rotation of the cam. In the figure, cam rotation angle α.

β、γは第６図の回転角に合致する。第７図の（１）は
真空バルブが閉する場合のもので、第６図でカム６２が
反時計方向に動くわけであるから、軸トルクは零から第
５図で示す引外しばね６０を圧縮しながら次第に増加し
、角度α動いた時点で可動ロッド５３が固定ロッド５２
に接触し、そのおと加圧ばね５５を押し込む行程に入る
。そこで軸トルクが急激に増大し、カム６２の外周円６
５にカムローラ６１が接する角度β動いた点で最大トル
クとなり、そのあと次第に小さくなり真空バルブが所定
の外部加圧力を与えられた力度γで軸トルクは零となる
。真空バルブを開く場合は上述と全く逆の動作となり、
駆動軸に対するトルクも負として働き第７図（２）のよ
うになる。すなわち、真空バルブ投入時には正方向、開
極時には負方向のトルクが駆動軸６４にかかる。β and γ match the rotation angles shown in FIG. (1) in FIG. 7 is when the vacuum valve is closed, and since the cam 62 moves counterclockwise in FIG. 6, the shaft torque changes from zero to the trip spring 60 shown in FIG. The movable rod 53 gradually increases while being compressed, and when the angle α moves, the movable rod 53 moves to the fixed rod 52.
, and then begins the process of pushing in the pressure spring 55. At this point, the shaft torque increases rapidly, and the outer circumference 6 of the cam 62 increases.
The maximum torque is reached at the point where the cam roller 61 moves by an angle β where the cam roller 61 comes into contact with the shaft torque 5, and then gradually decreases until the shaft torque becomes zero at the force γ when the vacuum valve is applied with a predetermined external pressing force. When opening the vacuum valve, the operation is completely opposite to that described above.
The torque on the drive shaft also acts as negative, as shown in FIG. 7(2). That is, a positive torque is applied to the drive shaft 64 when the vacuum valve is closed, and a negative torque is applied when the vacuum valve is opened.

第８図は三相の同一作用をする真空バルブＲ２Ａ、Ｂが
それぞれ同時に開閉する場合の開閉タイムチャートで斜
線部は閉状態を示す。このタイムチャート通）に三相す
べでの真空バルブが動作するように、カムを回動円板上
に配置し駆動させる場合の合成トルク線図を第９図およ
び第１０図に示す。これらの図は第７図（１）、　＋２
）で示された単体真空バルブのトルク線図の合成で点線
は三相分の合成トルクである。なお、三相の場合には駆
動軸上には回動円板を３個配置し、各回動円板にはそれ
ぞれ３個のカムを配置し、これらの動作により９個の真
空バルブが開閉される。FIG. 8 is an opening/closing time chart when the three-phase vacuum valves R2A and B, which have the same function, open and close at the same time, and the shaded area indicates the closed state. FIGS. 9 and 10 show composite torque diagrams in the case where the cam is arranged on a rotating disk and driven so that all three-phase vacuum valves operate according to this time chart. These figures are Figure 7 (1), +2
), the dotted line is the composite torque of the three phases. In the case of three-phase, three rotating disks are placed on the drive shaft, and three cams are placed on each rotating disk, and nine vacuum valves are opened and closed by these operations. Ru.

第９図は単独の主真空バルブＡで通電しているタップＴ
２から主真空バルブＢと抵抗用真空バルブＲとで並列通
電するタップＴ１への切り換え時の合成トルク線図で、
第８図のタイムチャート通り各相の真空バルブＲの閉で
始まり、真空バルブＢの閉で終わる。この場合、駆動当
初においては合成トルクが正となシ抗力として作用する
。引張しばね（第２図２５）による駆動トルクは常に前
記合成トルクを上まわるので図示しない。Figure 9 shows tap T energized by a single main vacuum valve A.
This is a composite torque diagram when switching from 2 to tap T1, which energizes main vacuum valve B and resistance vacuum valve R in parallel.
As shown in the time chart of FIG. 8, the process starts with the closing of the vacuum valve R of each phase and ends with the closing of the vacuum valve B. In this case, at the beginning of driving, the resultant torque is positive and acts as a drag force. The driving torque by the tension spring (FIG. 2, 25) is not shown because it always exceeds the resultant torque.

第１０図はタップＴ１からＴ２への切り換え時の駆動軸
の合成トルク線図で各相の真空バルブＢの開で始まシ真
空バルブＲの開で終わる。この場合、駆動当初において
は合成トルクは抗力としては作用せず、負の力、すなわ
ちカムを回転させる力として作用する。FIG. 10 is a composite torque diagram of the drive shaft when switching from tap T1 to T2, starting with the opening of the vacuum valve B of each phase and ending with the opening of the vacuum valve R. In this case, at the beginning of driving, the resultant torque does not act as a drag force, but acts as a negative force, that is, a force that rotates the cam.

引張シばね（第２図２５）に蓄積されたエネルギを急激
に放出する機構はタップＴ１→Ｔ２切換時は第３図（３
）、タップＴ２→Ｔ１時は第４図（２）で示されるよう
な死点を越すことが条件となっている。The mechanism that rapidly releases the energy stored in the tension spring (Fig. 2, 25) is shown in Fig. 3 (3) when switching from tap T1 to T2.
), when the tap T2→T1, the condition is to cross the dead center as shown in FIG. 4 (2).

しかし死点位置は揺動レバ（第２図の２３）に与えるト
ルクが小さく、機械的摩擦力で動作が左右されるため非
常に不安定であるのでタップＴ１→Ｔ２方向切換時のよ
うな駆動当初に抗力がない場合には、引張シばねによる
トルクが規定値にならないうちに真空バルブが動き出す
ことがあシ、正確な開閉速度やタイミングが得られない
欠点がある。However, at the dead center position, the torque applied to the swing lever (23 in Fig. 2) is small, and the operation is affected by mechanical frictional force, making it extremely unstable. If there is no resistance at the beginning, the vacuum valve may begin to move before the torque from the tension spring reaches the specified value, which has the drawback that accurate opening/closing speed and timing cannot be obtained.

この発明は前述のような従来の欠点を改め、特に高価に
せずに各真空バルブ間の開閉タイミングや開閉速度を正
確に保つことを目的とする。この目的はこの発明によれ
ば次のように構成することによシ達成される。すなわち
、複数個の真空バルブと、このそれぞれの真空バルブの
可動ロンドに所定の加圧力を与えて前記真空バルブを閉
成させるばねを有する操作機構と、前記ばねを伸縮させ
て真空バルブを開閉するカムを有する開閉機構と、連動
機構に連結されて回動されるとともにそれぞれの真空バ
ルブを所定の順序で開閉可能に前記開閉機構が取り付け
られた駆動軸とを備えたものにおいて、負荷時タップ切
換器の真空バルブ駆動機構の前記駆動軸の回動によって
前記真空バルブを開閉動作させる最初のカムであってか
つ真空バルブを開動作させるカムに前記ばねの加圧力を
駆動軸の回動初期に増大させる突出したカム面を付加さ
せる。The present invention aims to correct the above-mentioned conventional drawbacks and to accurately maintain the opening/closing timing and opening/closing speed between each vacuum valve without increasing the cost. This object is achieved according to the present invention by the following configuration. That is, a plurality of vacuum valves, an operating mechanism having a spring that applies a predetermined pressure to a movable rod of each vacuum valve to close the vacuum valve, and an operating mechanism that expands and contracts the spring to open and close the vacuum valve. A device equipped with an opening/closing mechanism having a cam, and a drive shaft connected to an interlocking mechanism to be rotated and to which the opening/closing mechanism is attached so as to be able to open and close each vacuum valve in a predetermined order, the tap switching under load. The pressurizing force of the spring is increased at the beginning of rotation of the drive shaft, which is the first cam that opens and closes the vacuum valve by rotation of the drive shaft of the vacuum valve drive mechanism of the device, and the cam that opens and opens the vacuum valve. A protruding cam surface is added.

この発明にかかわる負荷時タップ切換器の構造は既に述
べたものと開閉装置および真空バルブ操作機構の一部を
除いて従来のものと同一であり、以下同一符号は前出と
同一作用をするものを示す。The structure of the on-load tap changer according to the present invention is the same as that of the conventional one except for the part already described and the opening/closing device and the vacuum valve operation mechanism, and the same reference numerals hereinafter refer to the same functions as those described above. shows.

第１１図はこの発明実施例の真空パルプ操作機構７０と
開閉装置７１で前述しだ１抵抗３真空バルブ式三和負荷
時タップ切換器の抵抗用真空バルブと並列通電される（
第１図では真空バルブＢ）１個の主真空バルブを作動さ
せるものである。FIG. 11 shows a vacuum pulp operating mechanism 70 and a switch 71 according to an embodiment of the present invention, which are energized in parallel with the resistor vacuum valve of the one-resistance, three-vacuum-valve type Sanwa on-load tap changer.
In FIG. 1, vacuum valve B) operates one main vacuum valve.

第１１図においてカム７２と加圧ばね７３以外は前述の
第５図と同様であるので重複部の説明を省略する。カム
７２はカム６２の正常な真空バルブ閉時のカムローラ６
１との当接位置を避けて外周円６５上に突出したカム面
６６を設けたものである。すなわち、カムローラ６１が
突出したカム面６６上に乗った場合はカムローラ６１は
真空バルブの正常な閉時より一層固定ロッド５２方向に
押し上げられる。換言すれば加圧ばね７３は一層圧縮さ
れ、さらにいいがえれば固定ロッド５２と可ｉｎロッド
５３との接触圧力は一層大きくなる。しかしこれは加圧
ばね７３のばね常数を従来よシ小さく選択することにょ
シ何等差し支えない。In FIG. 11, the components other than the cam 72 and the pressure spring 73 are the same as those in FIG. 5 described above, so the explanation of the overlapping parts will be omitted. The cam 72 is the cam roller 6 when the cam 62 normally closes the vacuum valve.
A cam surface 66 is provided that protrudes onto the outer circumferential circle 65 avoiding the contact position with 1. That is, when the cam roller 61 rides on the protruding cam surface 66, the cam roller 61 is pushed up further toward the fixed rod 52 than when the vacuum valve is normally closed. In other words, the pressure spring 73 is further compressed, and in other words, the contact pressure between the fixed rod 52 and the in-line rod 53 is further increased. However, this does not pose any problem even if the spring constant of the pressure spring 73 is selected to be smaller than the conventional one.

第１２図はカム７２の拡大図であシ、駆動軸６４　（０
２）が角度θ＝φ１＋α十β＋γ＋δ１＋δ２十φ２だ
け往復回転することにょシ真空バルブが開閉する。第６
図とはカムローラ６１が突出したカム面６６上を動くこ
とだけが違っている。FIG. 12 is an enlarged view of the cam 72 and the drive shaft 64 (0
2) is reciprocated by an angle θ = φ1 + α + β + γ + δ1 + δ2 + φ2, and the vacuum valve opens and closes. 6th
The only difference from the figure is that the cam roller 61 moves on a protruding cam surface 66.

第１３図（１）　（２１はこの発明のカムにょシ真空パ
ルプを開閉するために必要な駆動軸のトルクをカムの回
転角に合わせて描いたトルク線図で、カム回転角α、β
、乙　δ１．δ２は第１２図の回転角に合致する。（１
）は真空バルブ閉動作、（２）は真空バルブ開動作の線
図である。Figure 13 (1) (21 is a torque diagram depicting the torque of the drive shaft required to open and close the cam vacuum pulp of this invention according to the rotation angle of the cam, and the cam rotation angle α, β
, Otsu δ1. δ2 matches the rotation angle shown in FIG. (1
) is a diagram of the vacuum valve closing operation, and (2) is a diagram of the vacuum valve opening operation.

この発明によるカムの動作は、真空バルブ開がら閉への
方向へは第１２図でカム７２が反時計方向に動くから遊
び回転角φ１の後軸トルクは零から第１１図で示す引け
ずしばね５８を押しながら次第に増加し、α角動いた時
点で可動ロッド５３が固定ロッド５２に接触する。以後
加圧はね７３を押し込む行程に入シ、トルクが急激に増
大しカム７２の突出したカム面６６の頂部に接する角度
β動いた点で最大トルクとなる。その後次第に小さくな
シ角度δ１の遊び回転を経て角度δ２動作した点で真空
バルブ所定正常の外部圧力になシ、トルクは零となる。The operation of the cam according to the present invention is such that the cam 72 moves counterclockwise in the direction from opening to closing of the vacuum valve as shown in FIG. It gradually increases while pushing the spring 58, and the movable rod 53 comes into contact with the fixed rod 52 when it moves by α angle. Thereafter, the pressurizing spring 73 enters the stroke of being pushed in, and the torque increases rapidly, reaching the maximum torque at the point where the cam 72 has moved by an angle β in contact with the top of the protruding cam surface 66. After that, the vacuum valve reaches a predetermined normal external pressure and the torque becomes zero at the point where the vacuum valve moves at an angle δ2 after passing through idle rotation at an angle δ1 which gradually becomes smaller.

その後角度φ２の遊び回転をして停止し、駆動軸のトル
ク線図は集１３図の（１）となる。真空パルプ閉から開
への方向は駆動軸を逆回転させると上述と全く反対の動
作となシ、第１３図（２）のよ−うになる。Thereafter, it rotates with an idle angle of φ2 and stops, and the torque diagram of the drive shaft becomes (1) in Figure 13 of the collection. When the drive shaft is rotated in the opposite direction, the direction from the vacuum pulp close to the open direction is completely opposite to that described above, as shown in FIG. 13 (2).

第１４図および第１５図は三相の、同様な作用をする各
真空バルブが第８図のタイムチャートのように同時に開
閉される場合のトルク線図で実線は一相分で点線は三相
分の合成トルクである。そして第１４図はタップＴ１→
Ｔ２方向切シ換え時、すなわち限流抵抗用真空バルブＲ
と並列通電中の主真空バルブＢがら主真空バルブＡへの
切シ換え時のものである。この場合は合成トルクがカム
７２の突出したカム面６６にょシ切シ換え当初に正とな
シ抗力として作用するので従来のように引張りばねによ
るトルクが規定値にならないうちに真空バルブが動きだ
すことがない。第１５図はタップＴ２→Ｔ１方向切シ換
え時のトルク線図でこの場合は合成トルクが切シ換え当
初から大きな抗力となシ、突出したカム面６６は切シ換
えの終シに負のトルクとして作用するので何等差し支え
ない。Figures 14 and 15 are torque diagrams when three-phase vacuum valves with similar actions are opened and closed simultaneously as shown in the time chart in Figure 8. The solid line is for one phase, and the dotted line is for three phases. The resultant torque is And in Fig. 14, tap T1→
When switching the T2 direction, that is, the vacuum valve R for current limiting resistance
This is when switching from main vacuum valve B to main vacuum valve A, which is energized in parallel with . In this case, the resultant torque acts as a positive resistance force on the protruding cam surface 66 of the cam 72 at the beginning of switching, so unlike the conventional method, the vacuum valve starts to move before the torque from the tension spring reaches the specified value. There is no. Figure 15 is a torque diagram when switching from tap T2 to T1. Since it acts as a torque, there is no problem.

この三相同時切り換えの場合は任意の相の真空バルブＢ
をこの発明のカム７２で開閉させてもよい。In the case of this three-phase simultaneous switching, vacuum valve B of any phase
may be opened and closed by the cam 72 of the present invention.

真空バルブを使用した三相負荷時タップ切換器において
は合成トルクを小さくするために第１６図に示すように
許す限シ各真空バルブの開閉タイミングをずらすことが
ある。この場合に所定のタップ切）換えが抵抗用真空バ
ルブと並列通電される主真空バルブの開路からはじまる
場合は少なくとも最初に開路する主真空バルブにこの発
明のカム７２を使用することによシヵム７２の突出した
カム面６６によるトルクは抗力として働き従来の欠点が
改められる。上記と逆の切シ換えの場合は突出したカム
面６６によるトルクは負として働くが第１５図の場合と
同様なんら差し支えない。In a three-phase on-load tap changer using vacuum valves, in order to reduce the combined torque, the opening and closing timing of each vacuum valve may be staggered within the allowable limit, as shown in FIG. 16. In this case, if the predetermined tap switching starts with the opening of the main vacuum valve that is energized in parallel with the resistance vacuum valve, the cam 72 of the present invention can be used at least for the main vacuum valve that is first opened. The torque produced by the protruding cam surface 66 acts as a drag force, thereby overcoming the conventional drawback. In the case of switching opposite to the above, the torque due to the protruding cam surface 66 acts as a negative force, but there is no problem as in the case of FIG. 15.

同様に三相各バルブの開閉タイミングを少しだけずらし
たときはどの相の真空バルブＢのカムに突出したカム面
６６を設けてもよい。Similarly, when the opening and closing timings of the three-phase valves are slightly shifted, the protruding cam surface 66 may be provided on the cam of the vacuum valve B of any phase.

以上の説明においては主として三相の負荷時タップ切換
器について述べたが、この発明はこれにとどまらず１相
用又は２相以上の多相用にもそのまま適用し得る。In the above description, a three-phase on-load tap changer was mainly described, but the present invention is not limited to this, and can be applied as is to a one-phase or a multi-phase device having two or more phases.

以上の説明で明らかなように、１抵抗３真空バルブ式負
荷時タップ切換器を連動機構にょシ操作するものにおい
て、抵抗用真全バルブと並列通電される少なくとも１個
の止具をバルンをその切υ換え中に固定ロッドと可動ロ
ッドの接触圧力を正常時の接触圧力よシ一層増加させる
突出したカム面を備えたカムにょシ操作することにより
、％真空パルプの正確な開閉速度やタイミングを確保す
ることかできる。As is clear from the above explanation, in a device that operates a one-resistance, three-vacuum-valve on-load tap changer using an interlocking mechanism, at least one stopper that is energized in parallel with the resistor valve is connected to the valve. By operating a cam with a protruding cam surface that increases the contact pressure between the fixed rod and the movable rod even more than the normal contact pressure during switching, accurate opening/closing speed and timing of the vacuum pulp can be controlled. It is possible to secure it.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は１抵抗３真空パルプ式負荷時タップ切換器の１
相分の切シ換え順序を示す図、第２図はタップ切り換え
機構説明図、第３図、第４図はそれぞれタップ切シ換え
動作図、第５図は真空バルブ操作機構と開閉装置構造図
、第６図はカムおよびカムローラ動作図、第７図は真空
バルブを開閉するだめの駆動軸のトルク線図、第８図は
三相負荷時タップ切換器の開閉チャート図、第９図は三
相同時開閉時のタッグＴ２→Ｔ１方向切換時のトルク線
図、第１０図は三相同時開閉時タップＴ１→Ｔ２方向切
換時のトルク線図、第１１図はこの発明実施例の真空バ
ルブ操作機構と開閉装置構造図、第１２図はこの発明実
施例のカムおよびカムローラ動作図、第１３図、第１４
図、第１５図、第１７図はこの発明実施例の三相負荷時
タップ切換器の切シ換え時のトルク線図、第１６図は許
す限シ各真空バルブの開閉タイミングをずらした時の三
相負荷時タップ切換器の開閉チャートである。 ２ａ２ｂ：タップ選択器、２７：速動機構、５２：固定
ロッド、５３：可動ロッド、６４：駆動軸、６６：突出
したカム面、７１：開閉装置、７３：加圧ばね、Ａ、Ｂ
：主真空バルブ、Ｒ−：抵抗用真空バルブ、ｒ−限流抵
抗、Ｔ１．　　Ｔ２　’、タップ、０２：駆動軸。 ↑　　　１　　図 （１１Ｔ２１　　　　　　　　　　（３〕　　　　　　
　　　　（４７オ　　２’ｆＱ 才　　３　　図 −ｆ　　　４　　　図 オ　　５　　　図 （１）　　　　　　　　　　　　　　　　　　　（２７
１ｚ−ＴＩ−１２ 芽　　ｇ　　図 １ 才　ｑ　　図 １ ？　７０　　図 才１１喝Figure 1 shows a 1-resistance, 3-vacuum-pulp type on-load tap changer.
A diagram showing the phase switching order, Figure 2 is an explanatory diagram of the tap switching mechanism, Figures 3 and 4 are respectively diagrams of the tap switching operation, and Figure 5 is a structural diagram of the vacuum valve operating mechanism and opening/closing device. , Fig. 6 is a diagram of the operation of the cam and cam roller, Fig. 7 is a torque diagram of the drive shaft for opening and closing the vacuum valve, Fig. 8 is an opening/closing chart of the tap changer during three-phase load, and Fig. 9 is a diagram of the operation of the three-phase load tap changer. Torque diagram when switching from tag T2 to T1 direction during phase simultaneous opening/closing, Fig. 10 is a torque diagram when switching from tap T1 to T2 direction during three phase simultaneous opening/closing, Fig. 11 shows vacuum valve operation according to the embodiment of this invention. The structure of the mechanism and opening/closing device is shown in Fig. 12, and the cam and cam roller operation diagram of the embodiment of this invention are shown in Fig. 13 and Fig. 14.
Figures 15 and 17 are torque diagrams when switching the three-phase load tap changer according to the embodiment of the present invention, and Figure 16 is a torque diagram when the opening/closing timing of each vacuum valve is shifted within the allowable limit. It is an opening/closing chart of a three-phase load tap changer. 2a2b: Tap selector, 27: Speed mechanism, 52: Fixed rod, 53: Movable rod, 64: Drive shaft, 66: Projected cam surface, 71: Opening/closing device, 73: Pressure spring, A, B
: Main vacuum valve, R-: Vacuum valve for resistance, r- Current limiting resistor, T1. T2', tap, 02: drive shaft. ↑ 1 Figure (11T21 (3)
(47o 2'fQ year old 3 Figure-f 4 Figure-O 5 Figure (1) (27
1z-TI-12 Bud g Figure 1 Year q Figure 1 ? 70 Illustration 11 cheers

Claims (1)

【特許請求の範囲】 １）複数個の真空バルブと、このそれぞれの真空バルブ
の可動ロンドに所定の加圧力を与えて前記真空バルブを
閉成させるばねを有する操作機構と、前記ばねを伸縮さ
せて真空バルブを開閉するカムを有する開閉機構と、連
動機構に連結されて回動されるとともにそれぞれの真空
バルブを所定の順序で開閉可能に前記開閉機構が取シ付
けられた駆動軸とを備えたものにおいて、前記駆動軸の
回動によって前記真空バルブを開閉動作させる最初のカ
ムであってかつ真空バルブを開動させるカムに付加され
、前記はねの加圧力を駆動軸の回動初期に増大させる突
出したカム面を有してなることを↑矛イＹ 特徴とする負荷時タップ切換器の真空パルプ駆動機構。[Scope of Claims] 1) An operation mechanism having a plurality of vacuum valves, a spring that applies a predetermined pressure to a movable rod of each vacuum valve to close the vacuum valve, and an operation mechanism that expands and contracts the spring. an opening/closing mechanism having a cam for opening and closing vacuum valves; and a drive shaft connected to an interlocking mechanism to rotate and to which the opening/closing mechanism is attached so as to be able to open and close each vacuum valve in a predetermined order. In the first cam, the cam is the first cam that opens and closes the vacuum valve as the drive shaft rotates, and is added to the cam that opens the vacuum valve, increasing the pressing force of the spring at the beginning of the drive shaft rotation. A vacuum pulp drive mechanism for an on-load tap changer, characterized by having a protruding cam surface that causes